CN212551739U

CN212551739U - Atomizing chamber vacuum pumping mechanism

Info

Publication number: CN212551739U
Application number: CN202020961789.8U
Authority: CN
Inventors: 王利民; 黄力军; 陈舟; 李盘; 蔡巍; 汤剑成
Original assignee: Hunan Skyline Smart Material Technology Co ltd
Current assignee: Hunan Skyline Smart Material Technology Co ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-02-19
Anticipated expiration: 2030-06-01

Abstract

The invention provides an atomizing chamber vacuumizing mechanism which comprises an atomizing chamber body and a sealing valve, wherein an atomizer is arranged at the upper end of the atomizing chamber body, the sealing valve is arranged at the lower end of the atomizer, the atomizing chamber body is connected with a vacuum pump through a pipeline, the sealing valve comprises a driver, a connecting rod, an isolating valve core, an isolating plate and a limiting block, one end of the driver is fixed outside the atomizing chamber, the other end of the driver is detachably connected with the isolating plate in the atomizing chamber, the limiting block is arranged in the extending direction of the isolating plate, the isolating plate is movably connected with the isolating valve core positioned above the isolating plate through the connecting rod, and the isolating valve core is used for sealing an opening at the upper. This scheme is effectual has reduced atomizing indoor air or oxygen content, the effectual vacuum that improves the atomizing indoor, to filling behind the inert gas of pressure-fired in the atomizing room, can effectual reduction outside air's entering, the effectual product course of working that has reduced is by the oxidation probability, further improvement to the processingquality of product.

Description

Atomizing chamber vacuum pumping mechanism

Technical Field

The invention relates to the technical field of metal powder preparation, in particular to an atomizing chamber vacuumizing mechanism.

Background

The core of the metal 3D printing technology is materials and devices, the devices are mature gradually along with the development of the metal 3D printing technology, but the types of materials which can be used for metal 3D printing are few, the performance is unstable, and the traditional metal powder material for powder metallurgy cannot be completely suitable for the metal 3D printing process. In addition, the research and production of the special metal powder are mainly concentrated in a few foreign metal powder metallurgy companies, few domestic enterprises capable of producing high-quality spherical metal powder materials suitable for metal 3D printing are provided, the technical level of relevant industries in China is limited, the metal powder for 3D printing is required to be high in sphericity, low in oxygen content and narrow in particle size distribution, and the research on the performance of the metal powder materials, the accumulation of preparation technical data and the like are hidden in China. At present, most of materials used in the 3D printing rapid prototyping technology in China need to be imported from abroad, or equipment manufacturers invest great energy and cost for research and development, and the price is high, so that the production cost is increased. Therefore, the problems of good material performance and cost are solved, and the development of the rapid forming technology in China can be better promoted.

The preparation method of the metal powder mainly comprises an air atomization method, a liquid drop injection method, a shredding, punching and re-cauterizing method, an electric spark erosion method and the like. Among them, the gas atomization method is a powder preparation technique which is developed rapidly and widely used in recent years. The gas atomization method is used for preparing powder, high-pressure high-speed airflow is used for acting on molten liquid flow, kinetic energy of the high-speed airflow is converted into surface energy of molten drops, and then the molten drops are crushed to form fine liquid drops, and the fine liquid drops are spheroidized and cooled to generate powder. The gas atomization powder preparation has the advantages of small environmental pollution, simple process, high cooling speed and the like, and the prepared powder has the advantages of high sphericity, uniform components, fine crystal grains and the like, but also has the problems of wide particle size distribution, high oxygen content, large gas consumption, high cost and the like which need to be solved. The patent number CN109482896A discloses the field of vacuum induction gas atomization powder making equipment, in particular to a vacuum semi-continuous gas atomization powder making furnace, which comprises a platform, wherein a furnace body assembly, an atomization chamber, a powder collecting assembly, a vacuum assembly and a turret assembly are respectively arranged on the platform; the furnace body component is fixedly arranged on the atomizing chamber; the cavity of the furnace body component is communicated with the cavity of the atomizing chamber through a first isolating valve; the vacuum pipeline port of the vacuum component is respectively communicated with the furnace body component and the cavity of the atomizing chamber; the turret assembly is connected with the furnace body assembly; and the powder collecting port of the powder collecting component is communicated with the powder outlet at the bottom of the atomizing chamber. In the use process of the existing powder preparation method and the existing powder preparation device, before smelting and atomizing, a feeding chamber, a smelting chamber and an atomizing chamber need to be vacuumized again, and then inert gas with certain pressure is injected into the smelting chamber and the atomizing chamber.

The material inlet of the atomizing chamber of the traditional atomizing equipment is not provided with a sealing device, so that the equipment is relatively slow in pre-vacuumizing or low in pre-vacuumizing efficiency, and the residual quantity of air in the atomizing chamber is large and the pre-vacuumizing quality is low after the pre-vacuumizing is finished; then, the micro-positive pressure cannot be maintained after the atomization chamber is filled with inert gas, so that air can easily enter the bin during feeding, and the aeration effect is influenced; when the air content in the atomizing chamber is high, the oxygen content (ppm) of the powder can be increased, the beneficial effect and powder index of equipment are easily reduced, and the quality of a product is finally reduced; the prior art in general suffers from the following disadvantages: 1. the atomization chamber has low efficiency and low pre-pumping quality during pre-pumping vacuum; 2. the atomization chamber can not keep micro-positive pressure after being filled with inert gas, and air can easily enter the atomization chamber during feeding; 3. the atomized powder has high oxygen content (ppm), and the product is easy to be oxidized in the processing process, so that the product quality is low.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the vacuum pumping mechanism of the atomizing chamber, which is convenient for improving the vacuum degree, reducing the risk of oxidation of products and improving the product quality.

The technical scheme of the invention is as follows: the utility model provides an atomizer chamber evacuation mechanism, includes atomizer chamber body and seal valve, and atomizer chamber body upper end is equipped with the atomizer, and the lower extreme of atomizer is located to the seal valve, and the atomizer chamber body passes through the pipe connection vacuum pump, the seal valve includes driver, connecting rod, isolation case, division board and stopper, and the one end of driver is fixed in the atomizer chamber outside, and the other end can be dismantled with the division board in the atomizer chamber and be connected, is equipped with the stopper in the extending direction of division board, and the division board passes through the connecting rod and lies in the isolation case swing joint of division board top, and the drive that the division case passes through the driver is used for the opening of sealed atomizer.

Preferably, the driver is an air cylinder or a hydraulic cylinder, the driver is installed on the outer wall of the atomizing chamber, and a telescopic rod on the driver penetrates through the atomizing chamber and is detachably connected with the partition board in the atomizing chamber, such as clamping, pin shaft connection, embedding connection and the like, so that the partition board can be conveniently installed and overhauled; in the using process, the driver drives the isolation plate to move towards the direction far away from the driver, the isolation plate drives the isolation valve core to move together through the connecting rod, the isolation valve core is limited by the front end limiting block, the isolation plate continuously moves forwards, the isolation valve core moves towards the upper part of the isolation plate under the guidance of the limiting block, so that an opening at the upper end of the isolation valve core is sealed, the atomization chamber is isolated from the external atmosphere to play a sealing role, the effect of pre-vacuumizing the atomization chamber is convenient to promote, the micro-positive pressure can be kept after inert gas is filled into the atomization chamber before the atomization of the metal material, the external air cannot enter, the air or oxygen content in the atomization chamber is reduced, the risk of oxidation of products in the processing process is reduced, and the quality of atomized products is improved; in addition, before the atomization work formally starts, the telescopic rod on the driver is retracted, so that the isolating valve core can be protected, the service life of the sealing valve is prolonged, and the maintenance cost of the sealing valve is reduced.

Further, the sealing valve is installed at the lower end of the atomizer through an installation plate, and a sealing ring is arranged between the isolation valve core and the installation plate. The sealing effect is improved.

Furthermore, one end of the isolation plate, which is far away from the driver, is in a T shape. In the use, when the median moves the isolation case and removes, the direction rebound that the isolation case was restricted the position piece, the T font one end of removal in-process division board can play spacing effect, the upper end that makes the T font can contact with the below of stopper, form the atress that the screens was convenient for to the stuck point, prevent that the screens rebound and influence the sealed effect of isolation case, the while screens passes through the connecting rod and forms lever action with the isolation case, the promotion of the sealed effect of the isolation case of being convenient for.

Furthermore, the one end that the stopper is close to the division board is equipped with the slope, and the contained angle between slope and the mounting panel is the acute angle, and the thickness of stopper is greater than or equal to the thickness of isolation case, makes the isolation valve closely laminate sealedly with the mounting panel. Preferably, the thickness of stopper is between the thickness of isolation case and the distance of isolation case up end and division board up end, makes the upper end opening part of closing at the atomizer chamber of isolation valve can be inseparable, perhaps can closely laminate with the mounting panel.

Furthermore, one end of the isolating valve core, which is far away from the driver, is provided with a slope matched with the limiting block. The removal of the isolation case of being convenient for, can be inseparable with the mounting panel laminating, improve sealed effect.

Furthermore, the limiting block is welded and fixed below the mounting plate, or the limiting block and the mounting plate are integrally formed. The connection strength between the limiting block and the mounting plate is convenient to improve, and further the structural strength of the sealing valve is improved, and the service life of the sealing valve is prolonged.

Further, a transition chamber is arranged between the driver and the isolation plate. The driver makes for cylinder or pneumatic cylinder, and telescopic link on the driver can contract in the transition storehouse room, reduces the influence of temperature and dust environment to the driver, the improvement of the driver life of being convenient for.

Furthermore, a guide block is arranged below one end of the mounting plate, which is close to the driver. The isolating valve core is convenient to cover the opening, the isolating valve core is guided, abrasion to the mounting plate is reduced, and the sealing effect is convenient to improve.

Furthermore, the mounting plate is fixed on the atomizing chamber through a refrigerant interlayer. The cost of preparing materials for the atomizing chamber is convenient to reduce, the temperature of the outer wall of the atomizing chamber can be improved by adopting the refrigerant interlayer, the influence of high temperature on the external environment is reduced, the service life of the sealing ring is prolonged, and the use safety is improved.

Further, an induction heating coil is arranged above the atomizer. In the use process, the metal material is heated and melted by the induction heating coil and then enters the atomizing chamber, and the melt is atomized by the atomizer at the upper end of the atomizing chamber and then is cooled and collected.

The invention has the following characteristics: this scheme is effectual has reduced atomizing indoor air or oxygen content, the effectual vacuum that improves the atomizing indoor, to filling behind the inert gas of pressure-fired in the atomizing room, can effectual reduction outside air's entering, reduced effectively in the product course of working by the oxidation probability, further improved the processingquality to the product.

The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

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

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a sectional view taken along line B-B;

FIG. 4 is an enlarged view of a portion of FIG. 3;

the device comprises a driver, a 2-atomizing chamber, a 3-induction heating coil, a 4-atomizer, a 5-mounting plate, a 6-transition chamber, a 7-sealing ring, an 8-connecting rod, a 9-isolating valve core, a 10-isolating plate, a 11-refrigerant interlayer, a 12-limiting block and a 13-guide block.

Detailed Description

As shown in the attached drawings: the utility model provides a 2 evacuation mechanisms in atomizer chamber, including 2 bodies in atomizer chamber and seal valve, 2 bodies in atomizer chamber upper ends are equipped with atomizer 4, the lower extreme of atomizer 4 is located to the seal valve, 2 bodies in atomizer chamber pass through the pipe connection vacuum pump (not shown), the seal valve includes driver 1, connecting rod 8, isolation valve core 9, division board 10 and stopper 12, the one end of driver 1 is fixed in the 2 outsides of atomizer chamber, the other end can be dismantled with division board 10 in the atomizer chamber 2 and be connected, be equipped with stopper 12 on the extending direction of division board 10, division board 10 passes through connecting rod 8 and the isolation valve core 9 swing joint who is located division board 10 top, isolation valve core 9 is used for the opening of sealed atomizer chamber 2 upper end through the drive of driver 1.

Connecting rod 8's both ends all are equipped with the connecting hole, are connected with division board 10, isolation case 9 respectively through the pivot, and for the stability that improves isolation case 9 and remove, connecting rod 8 sets up two at least, and in this embodiment, two set up three to be triangular distribution, be convenient for support isolation case 9, thereby make isolation case 9 along with division board 10 steady movement.

Preferably, the driver 1 is a pneumatic cylinder or a hydraulic cylinder, the driver 1 is installed on the outer wall of the atomizing chamber 2, the telescopic rod on the driver 1 penetrates through the atomizing chamber 2, and detachably connected with the isolation plate 10 in the atomization chamber 2, such as clamping connection, pin shaft connection, embedding connection and the like, so that the isolation plate 10 is convenient to install and overhaul, the driver 1 drives the isolation plate 10 to move away from the driver 1, the isolation plate 10 drives the isolation valve core 9 to move together through the connecting rod 8, the isolation valve core 9 is limited and guided by the front end limiting block 12, the isolation plate 10 continues to move forward, so that the isolation valve core 9 moves above the isolation plate 10 under the guide of the limiting block 12, thereby sealing the opening at the upper end of the isolating valve core 9, isolating the atomizing chamber 2 from the outside atmosphere to play a sealing role, starting the vacuum pump to vacuumize the atomizing chamber 2 at the moment, and further improving the pre-vacuumizing effect of the atomizing chamber 2; before the metal material is atomized, inert gas is filled into the atomizing chamber 2, and then micro-positive pressure can be kept, so that external air cannot enter, the influence of the air on the atomizing effect is reduced, and the quality of an atomized product is improved; in addition, before the atomization work formally starts, the telescopic rod on the driver 1 is retracted, so that the isolating valve core 9 can be protected, the service life of the sealing valve can be prolonged, and the maintenance cost of the sealing valve is further reduced.

In the embodiment, the sealing valve is mounted at the lower end of the atomizer 4 by means of a mounting plate 5, and a sealing ring 7 is provided between the isolating valve cartridge 9 and the mounting plate 5. The sealing effect is improved. The mounting plate 5 is provided with a hole which is an opening at the upper end of the atomizing chamber 2.

As shown in fig. 4, the end of the isolation plate 10 away from the driver 1 is T-shaped; in the use, when division board 10 drives division case 9 and removes, division case 9 receives the direction rebound of stopper 12, the T font one end of removal in-process division board 10 can play spacing effect, the upper end that makes the T font can contact with the below of stopper 12, form the atress that the division board 10 of being convenient for of stuck point, prevent division board 10 rebound and influence the sealed effect of division case 9, division board 10 forms lever action through connecting rod 8 and division case 9 simultaneously, the promotion of the sealed effect of division case 9 of being convenient for.

In the embodiment, one end of the limiting block 12 close to the isolation plate 10 is provided with a slope, an included angle between the slope and the mounting plate 5 is an acute angle, and the thickness of the limiting block 12 is larger than or equal to that of the isolation valve core 9, so that the isolation valve can be tightly attached and sealed with the mounting plate 5. Preferably, the thickness of the limiting block 12 is between the thickness of the isolating valve core 9 and the distance between the upper end face of the isolating valve core 9 and the upper end face of the isolating plate 10, so that the isolating valve can be tightly covered at the opening at the upper end of the atomizing chamber 2, or can be tightly attached to the mounting plate 5.

One end of the isolating valve core 9 far away from the driver 1 is provided with a slope matched with the limiting block 12. The movement of the isolating valve core 9 is convenient, the isolating valve core can be tightly attached to the mounting plate 5, and the sealing effect is improved.

The limiting block 12 is welded and fixed below the mounting plate 5, or the limiting block 12 and the mounting plate 5 are integrally formed. The connection strength between the limiting block 12 and the mounting plate 5 is improved, and further the structural strength of the sealing valve is improved and the service life of the sealing valve is prolonged.

In another embodiment, a transition chamber 6 is provided between the drive 1 and the isolation plate 10. When the driver 1 is an air cylinder or a hydraulic cylinder, the telescopic rod on the driver 1 can contract the connecting rod 8, the isolating valve core 9 and the isolating plate 10 into the transition bin 6, so that the influence of temperature and dust environment on the driver 1 is reduced, and the service life of the sealing valve is prolonged conveniently.

In another embodiment, a guide block 13 is provided below the mounting plate 5 near one end of the actuator 1. The isolating valve core 9 is convenient to cover the opening, the isolating valve core 9 is guided, abrasion to the mounting plate 5 is reduced, and the sealing effect is convenient to improve.

The mounting plate 5 is fixed on the atomizing chamber 2 through a refrigerant interlayer 11. The cost of atomizing chamber 2 preparation material is convenient for reduce, adopts refrigerant intermediate layer 11, can improve the temperature of 2 outer walls of atomizing chamber, reduces the influence of high temperature to external environment to and the life of sealing washer, improve safe in utilization. An induction heating coil 3 is arranged above the atomizer 4. In the use process, the metal material is heated and melted by the induction heating coil 3 and then enters the atomizing chamber 2, and the melt is atomized by the atomizer 4 at the upper end of the atomizing chamber 2 and then is cooled and collected.

The scheme adopts a unique structure, parameters and size design, when a telescopic rod on the driver 1 extends out during use, the telescopic rod drives the isolation plate 10 and the isolation valve core 9 to move forwards, when the isolation valve core 9 touches the limiting block 12 on the mounting plate 5, the isolation valve core 9 is moved towards the mounting plate 5 under the guiding action of the limiting block 12, and the isolation valve core 9 and the mounting plate 5 are tightly attached, so that the atomization chamber 2 is isolated from the external atmosphere to play a sealing role, the pre-vacuumizing effect of the atomization chamber 2 is convenient to improve, inert gas needs to be filled into the atomization chamber 2 before atomization processing is carried out on a metal material, the micro-positive pressure in the atomization chamber 2 is kept, the external air cannot enter the atomization chamber 2, the vacuum effect in the atomization chamber 2 is further improved, the air or oxygen content in the atomization chamber 2 is convenient to reduce, and the quality of an atomized product is convenient to; before the atomization work formally starts, the telescopic rod on the driver 1 is retracted, the telescopic rod drives the isolating valve core 9 and the isolating plate 10 to perform return motion, so that the isolating plate 10, the telescopic rod and the connecting rod 8, and the isolating valve core 9 and the high-temperature sealing ring 7 are all isolated in the transition bin 6, and meanwhile, the service lives of the isolating plate 10, the telescopic rod and the connecting rod 8, and the isolating valve core 9 and the high-temperature sealing ring 7 are all made of high-temperature-resistant materials, so that the interference of the sealing valve on the product processing is reduced, meanwhile, the sealing valve can be well protected, the influence of high temperature on the sealing valve in the metal material processing process is avoided, the service life of the sealing valve is prolonged, and.

The preferred embodiments of the present invention have been described in detail above, but it is apparent that the present invention is not limited to the above embodiments. Within the scope of the technical idea of the invention, many equivalent modifications can be made to the technical solution of the invention, and these equivalent modifications are all within the protection scope of the invention. In addition, it should be noted that the respective technical features described in the above-described embodiments may be separately and independently combined as long as they are within the technical concept of the present invention.

Claims

1. The utility model provides an atomizer chamber evacuation mechanism, includes atomizer chamber body and seal valve, and atomizer chamber body upper end is equipped with the atomizer, and the lower extreme of atomizer is located to the seal valve, and the atomizer chamber body passes through pipe connection vacuum pump, its characterized in that: the seal valve comprises a driver, a connecting rod, an isolation valve core, an isolation plate and a limiting block, one end of the driver is fixed outside the atomization chamber, the other end of the driver is detachably connected with the isolation plate in the atomization chamber, the limiting block is arranged in the extending direction of the isolation plate, the isolation plate is movably connected with the isolation valve core positioned above the isolation plate through the connecting rod, and the isolation valve core is used for sealing an opening in the upper end of the atomization chamber through the drive of the driver.

2. The atomization chamber evacuation mechanism of claim 1, wherein: the sealing valve is installed at the lower end of the atomizer through an installation plate, and a sealing ring is arranged between the isolating valve core and the installation plate.

3. The atomization chamber evacuation mechanism of claim 2, wherein: one end of the isolation plate, which is far away from the driver, is in a T shape.

4. The atomization chamber evacuation mechanism of claim 1, wherein: the limiting block is provided with a slope at one end close to the isolating plate, an included angle between the slope and the mounting plate is an acute angle, and the thickness of the limiting block is larger than or equal to that of the isolating valve core.

5. The atomization chamber evacuation mechanism of claim 1, wherein: and one end of the isolating valve core, which is far away from the driver, is provided with a slope matched with the limiting block.

6. The atomization chamber evacuation mechanism of claim 5, wherein: the limiting block is welded and fixed below the mounting plate, or the limiting block and the mounting plate are integrally formed.

7. The atomization chamber evacuation mechanism of claim 5, wherein: a transition chamber is arranged between the driver and the isolation plate.

8. The atomization chamber evacuation mechanism of claim 2, wherein: and a guide block is arranged below one end of the mounting plate, which is close to the driver.

9. The atomization chamber evacuation mechanism of claim 8, wherein: the mounting plate is fixed on the atomizing chamber through the refrigerant interlayer.

10. The atomizing chamber evacuating mechanism of any one of claims 1-9, wherein: and an induction heating coil is arranged above the atomizer.