CN206794759U - Gas atomizing nozzle - Google Patents
Gas atomizing nozzle Download PDFInfo
- Publication number
- CN206794759U CN206794759U CN201720494959.4U CN201720494959U CN206794759U CN 206794759 U CN206794759 U CN 206794759U CN 201720494959 U CN201720494959 U CN 201720494959U CN 206794759 U CN206794759 U CN 206794759U
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- CN
- China
- Prior art keywords
- nozzle
- catheter
- air inlet
- inner ring
- outer shroud
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Abstract
The utility model is a kind of gas atomizing nozzle.Including nozzle outer shroud, nozzle inner ring, catheter, main air inlet pipe, auxiliary air inlet pipe, tundish, catheter is installed in the bottom of tundish, and one end of catheter communicates with the cavity of tundish, the protruding formation nozzle of the other end of catheter, nozzle inner ring sleeve is mounted in the outside of nozzle set by catheter, nozzle exterior ring cap is mounted in the outside of nozzle inner ring, atomization air chamber is formed between the inwall of nozzle outer shroud and the outer wall of nozzle inner ring, nozzle gas outlet circumferential weld is formed between the inwall of nozzle outer shroud and the outer wall of nozzle inner ring in the end of nozzle, and nozzle gas outlet circumferential weld communicates with atomization air chamber, two main air inlet pipes are symmetrically installed in the both sides of nozzle outer shroud, and one end of two main air inlet pipes communicates with atomization air chamber.The utility model not only improves liquation and smoothly flowed out, and is advantageous to control liquid inventory again, improves the atomizing effect and cooldown rate of molten metal, and gained deposit preform metal surface is evenly distributed, pore-free, improves recovery rate of iron.
Description
Technical field
The utility model is a kind of gas atomizing nozzle, more particularly to a kind of metal being used in precise spray forming technology
Liquid atomizer, it is a kind of high speed and high pressure gas confined type atomizing nozzle, belongs to the innovative technology of gas atomizing nozzle.
Background technology
Injection is formed with very high cooldown rate（≥l03~106K·s-1）With high interface growth speed under big supercooling degree
（>=1~100cms-1）Coagulating property, Fine Texture of Material can be made uniformly to refine, eliminate composition gross segregation, suppress it is microcosmic
Segregation generation, forms metastable structure, reduces brittlement phase, weakens material anisotropy, so that material has excellent usability
Energy.In stage of spray forming process, mainly nozzle is realized accelerates to pressurize to atomization gas, and reaches required mist with reference to tundish
Change effect, therefore, atomization system is one of key and core of injection shaping.
At present, various atomizing nozzle design schemes are a lot, but generally existing ejection air-flow is whard to control, atomization ability is weak,
The defects such as atomization scattering is big, catheter easily blocks, recovery rate is low, so as to be difficult to reach preferable atomizing effect and ensure to be injected into
Shape is smoothed out.Rational atomization system will not only ensure good atomizing effect, also avoid drain tube inlet because metal melts
Liquid tension force difficultly flows into, export because " regurgitating " cause to block the problems such as.At present, it has been disclosed that patent be including notification number
CN201082470Y, CN201399583Y, CN201900264U etc., on the one hand it is that nozzle arrangements improve, does not consider to influence mist
Change another key factor catheter design of effect；On the other hand use double-round or annular distance to arrange, cause to be atomized cone-shaped not
Preferable, the problems such as deposit preform cooling rate is relatively low.
The content of the invention
The purpose of this utility model is to consider above mentioned problem and provide a kind of gas atomizing nozzle.The utility model is being led
In the case that liquid pipe preheating temperature is relatively low, ensure that molten metal smoothly flows out from catheter, but drain bore need not be increased, keep away
Exempt from atomizing effect decrease；Meanwhile speed and pressure that atomization gas sprays from nozzle are improved, and ensure that ejection gas direction is steady
Fixed, concentration.
The technical solution of the utility model is：Gas atomizing nozzle of the present utility model, include nozzle outer shroud, in nozzle
Ring, catheter, main air inlet pipe, auxiliary air inlet pipe, tundish, wherein catheter are installed in the bottom of tundish, and the one of catheter
End communicates with the cavity of tundish, the protruding formation nozzle of the other end of catheter, and nozzle inner ring sleeve is mounted in set by catheter
The outside of nozzle, nozzle exterior ring cap are mounted in the outside of nozzle inner ring, structure between the inwall of nozzle outer shroud and the outer wall of nozzle inner ring
Into atomization air chamber, nozzle gas outlet circumferential weld is formed between the inwall of nozzle outer shroud and the outer wall of nozzle inner ring in the end of nozzle,
And nozzle gas outlet circumferential weld communicates with atomization air chamber, two main air inlet pipes are symmetrically installed in the both sides of nozzle outer shroud, and two masters
One end of air inlet pipe communicates with atomization air chamber.
The utility model is because using tundish is included, tundish bottom installs catheter, and surround on the outside of catheter
Nozzle structure, gases at high pressure by circumferential weld spray and metal liquid stream meets, be atomized molten metal；Molten metal is by leading
Flow tube draws nozzle.Drain bore entrance uses parabolic structure, and centre is taper, exports as straight wall section, so as to both favourable
Smoothly flowed out in liquation, be advantageous to control liquid inventory again；Catheter stretches out among restricted circumferential weld shape nozzle, atomization gas
Air inlet chamber is entered by the main air inlet pipe perpendicular to catheter distribution with both sides and the auxiliary air inlet pipe being tangentially distributed with air chamber.Into
The gas of air chamber is uniformly distributed in ring-type ellipse air chamber, and gas is through there is the circumferential weld that nozzle inner ring and outer rings are formed to spray；
Circumferential weld is laval structures, gas booster and speed-increasing after circumferential weld, improves the atomizing effect and cooldown rate of molten metal, and
It is good to be atomized cone-shaped, is in Gaussian Profile after deposition, while avoid molten metal and difficultly flow into catheter, outlet port metal
Liquation regurgitates easily blocked phenomenon, and gained deposit preform metal surface is evenly distributed, and pore-free, recovery rate of iron is carried
It is high.The utility model is a kind of ingenious in design, function admirable, convenient and practical gas atomizing nozzle.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the sectional view of the utility model air inlet pipe plane.
Embodiment
Embodiment：
Structural representation of the present utility model as shown in Figure 1, 2, gas atomizing nozzle of the present utility model, includes nozzle
Outer shroud 1, nozzle inner ring 2, catheter 3, main air inlet pipe 4, auxiliary air inlet pipe 5, tundish 6, wherein catheter 3 are installed in tundish 6
Bottom, and one end of catheter 3 communicates with the cavity of tundish 6, the protruding formation nozzle of the other end of catheter 3, spray
Mouth inner ring 2 is sleeved on the outside of nozzle set by catheter 3, and nozzle outer shroud 1 is sleeved on the outside of nozzle inner ring 2, nozzle outer shroud 1
Between inwall and the outer wall of nozzle inner ring 2 form atomization air chamber 7, between the inwall of nozzle outer shroud 1 and the outer wall of nozzle inner ring 2
The end of nozzle forms nozzle gas outlet circumferential weld 8, and nozzle gas outlet circumferential weld 8 communicates with atomization air chamber 7, two main air inlet pipes 4
The symmetrical both sides for being installed in nozzle outer shroud 1, and one end of two main air inlet pipes 4 communicates with atomization air chamber 7.
In the present embodiment, said nozzle gas outlet circumferential weld 8 is Laval structures, i.e. divergent-convergent-divergence form structure.
Angle between the circumferential weld center line of said nozzle gas outlet circumferential weld 8 and the geometric center lines of nozzle is 20 °~
50°.In the present embodiment, the angle between the circumferential weld center line of nozzle gas outlet circumferential weld 8 and the geometric center lines of nozzle is 34 °.
In the present embodiment, gap is 0.5~2mm at the convergence of said nozzle gas outlet circumferential weld 8.In the present embodiment, circumferential weld
Minimum clearance is 0.8mm at convergence.
In the present embodiment, above-mentioned catheter 3 is located at the bottom geometric center of tundish 6, and catheter 3 is using binding agent with
Between bag 6 be connected after high temperature sintering.
In the present embodiment, the hollow cavity inwall of said nozzle inner ring 2 is provided with positioning step, the outer wall of catheter 3 also phase
Positioning step should be provided with, catheter 3 is placed on the positioning table that the inwall of nozzle inner ring 2 is provided with by the positioning step set by its outer wall
Positioned on rank.
Two auxiliary air inlet pipe 5 are also equiped with the present embodiment, on said nozzle outer shroud 1, two auxiliary air inlet pipe 5 are in axis pair
Title is distributed in nozzle outer shroud 1, and the geometric center lines of two auxiliary air inlet pipe 5 and the atomization center circle of air chamber 7 are tangent.I.e. two it is auxiliary enter
Tracheae 5 is from the horizontal by 45 ° of angles.
In the present embodiment, the internal diameter of main air inlet pipe 4 is 8mm, and the auxiliary internal diameter of air inlet pipe 5 is 4mm.Two main air inlet pipes 4 and nozzle
Central axis is perpendicular and intersects, and two perpendicular arrangements of main air inlet pipe, two auxiliary air inlet pipe are tangentially arranged.
The internal diameter of above-mentioned main air inlet pipe 4 and the internal diameter size of auxiliary air inlet pipe 5 are between 2.5~0.8.Above-mentioned catheter
3 outlet diameter is 3~7mm, and outlet vertical wall section accounts for catheter total length 10%~20%.In the present embodiment, above-mentioned catheter 3
Outside is stepped, and the internal diameter entrance of catheter 3 uses parabolic structure, and centre is taper, is exported to be through-type.
In the present embodiment, the overall length 45mm of catheter 3, endoporus porch is parabolic shape, inlet diameter 12mm, is thrown
Thing line segment is highly 8mm, so as to avoid catheter inlet diameter smaller, causes molten metal difficult because of molten metal surface tension
To flow into catheter；The end diameter of catheter 3 is 3mm, length 6mm, so that molten metal flow is controlled, and in fact
The effect of existing liquation flow velocity speedup；Interlude is pyramidal structure, and tangent with entrance, it is ensured that molten metal smoothly flow through compared with
Long low temperature catheter, molten metal is avoided to be blocked because of temperature drop mobility variation.
Operation principle of the present utility model is as follows：The gas introduced from high-pressure air source, the pressure regulator valve and flow valve being concatenated,
Control to admission pressure and flow is realized, enters 4 by 1 and goes out multiple way union and be connected with main air inlet pipe 4 and auxiliary air inlet pipe 5, from
And ensure that main air inlet pipe 4 is identical with the auxiliary porch gas pressure of air inlet pipe 5, flow；Enter through main air inlet pipe 4 and auxiliary air inlet pipe 5
The gas sendout of air chamber is controlled by both internal diameter sizes and ratio.The gases at high pressure entered in air inlet chamber are from Laval structure circumferential welds
Middle booster and speed-increasing sprays, and is converged immediately below nozzle；After the molten metal flowed out from catheter 3 meets with gases at high pressure,
Molten metal is atomized by the impact of steady air flow, and continuing injection with air-flow occurs quick solidification, so as to realize that metal is molten
The atomization of liquid.
The utility model nozzle admission line is symmetrical perpendicular to the main air inlet pipe road of catheter and two using two
The individual and tangent auxiliary admission line distribution form of air chamber, main air inlet pipe road is vertical with air chamber, and gas enters；Auxiliary inlet manifold
Road and air chamber are tangent, and gas laterally enters, so that the air pressure in air chamber is uniform and stable, do not produce eddy flow, vortex.Jet expansion
For the ring-crack ventilation passage being made up of inside and outside two ring blocks, circumferential weld cross sectional shape is the Laval structures of divergent-convergent-divergence form,
Circumferential weld central axis is laid out for taper.
The utility model of the catheter internal diameter uses variable section structure, and in porch, using parabolic structure, centre is cone
Shape, export to be through-type.Entrance is parabolic structure, can be avoided because surface tension molten metal is difficult to enter catheter；Molten
After liquid enters catheter, pass through conical pipeline, it is ensured that liquation can flow through longer tubule；Export to be through-type, be liquation
Flowing is controlled and realizes flow control.
Restricted circumferential weld shape booster and speed-increasing gas atomization system of the present utility model has following features：
1st, there is unique four-way to enter system, ensure nozzle air chamber interior air-flow be evenly distributed, stable gas pressure, direction one
Cause, so that steady air current sprays from circumferential weld, be advantageous to control liquation atomization cone-shaped and atomizing effect.
2nd, gas outlet is set for circumferential weld shape, ensures that atomizer (atomizing) cone air flow method is uniform；Outlet circumferential weld is arranged to laval structures,
The effect of booster and speed-increasing can be played, significantly improves atomization gas kinetic energy, lifts atomizing effect, improves atomization metal cooldown rate.
3rd, middle drain bore is tertiary structure form, and entrance parabolic structure is advantageous to reduce molten metal surface
Power influences, and metal is smoothly flowed into catheter；Middle pyramidal structure, be advantageous to molten metal and led by the way that longer, temperature are relatively low
Liquid pipe, avoid drain blockage；The through-type structure in end, controllable liquation realize steady-flow, and realize liquation flow velocity speedup
With control.
Claims (10)
- A kind of 1. gas atomizing nozzle, it is characterised in that include nozzle outer shroud, nozzle inner ring, catheter, main air inlet pipe, it is auxiliary enter Tracheae, tundish, wherein catheter are installed in the bottom of tundish, and one end of catheter communicates with the cavity of tundish, leads The protruding formation nozzle of the other end of liquid pipe, nozzle inner ring sleeve are mounted in the outside of nozzle set by catheter, nozzle outer shroud suit In the outside of nozzle inner ring, between the inwall of nozzle outer shroud and the outer wall of nozzle inner ring form atomization air chamber, nozzle outer shroud it is interior Nozzle gas outlet circumferential weld, and nozzle gas outlet circumferential weld and atomization are formed between wall and the outer wall of nozzle inner ring in the end of nozzle Air chamber communicates, and two main air inlet pipes are symmetrically installed in the both sides of nozzle outer shroud, and one end of two main air inlet pipes and atomization air chamber Communicate.
- 2. gas atomizing nozzle according to claim 1, it is characterised in that said nozzle gas outlet circumferential weld is tied for Laval Structure, i.e. divergent-convergent-divergence form structure.
- 3. gas atomizing nozzle according to claim 1, it is characterised in that the circumferential weld center of said nozzle gas outlet circumferential weld Angle between line and the geometric center lines of nozzle is 20 °~50 °.
- 4. gas atomizing nozzle according to claim 1, it is characterised in that between at the convergence of said nozzle gas outlet circumferential weld Gap is 0.5~2mm.
- 5. gas atomizing nozzle according to claim 1, it is characterised in that the bottom that above-mentioned catheter is located at tundish is several What center, catheter are connected using binding agent with tundish after high temperature sintering.
- 6. according to the gas atomizing nozzle described in any one of claim 1 to 5, it is characterised in that the middle cavity of said nozzle inner ring Internal wall is provided with positioning step, and the outer wall of catheter is also correspondingly provided with positioning step, positioning of the catheter set by by its outer wall Step is placed on the positioning step that nozzle inner ring inwall is provided with and positioned.
- 7. gas atomizing nozzle according to claim 6, it is characterised in that be also equiped with said nozzle outer shroud two it is auxiliary Air inlet pipe, two auxiliary air inlet pipe are distributed in nozzle outer shroud in axisymmetrical, and the geometric center lines of two auxiliary air inlet pipe and atomization Air chamber center circle is tangent.
- 8. gas atomizing nozzle according to claim 7, it is characterised in that be stepped, catheter on the outside of above-mentioned catheter Internal diameter entrance use parabolic structure, centre is taper, is exported to be through-type.
- 9. gas atomizing nozzle according to claim 8, it is characterised in that the internal diameter of above-mentioned main air inlet pipe and auxiliary air inlet pipe Internal diameter size between 2.5~0.8.
- 10. gas atomizing nozzle according to claim 9, it is characterised in that the outlet diameter of above-mentioned catheter be 3~ 7mm, outlet vertical wall section account for catheter total length 10%~20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720494959.4U CN206794759U (en) | 2017-05-05 | 2017-05-05 | Gas atomizing nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720494959.4U CN206794759U (en) | 2017-05-05 | 2017-05-05 | Gas atomizing nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206794759U true CN206794759U (en) | 2017-12-26 |
Family
ID=60739193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720494959.4U Expired - Fee Related CN206794759U (en) | 2017-05-05 | 2017-05-05 | Gas atomizing nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206794759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042310A (en) * | 2017-05-05 | 2017-08-15 | 广东工业大学 | A kind of gas atomizing nozzle |
-
2017
- 2017-05-05 CN CN201720494959.4U patent/CN206794759U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042310A (en) * | 2017-05-05 | 2017-08-15 | 广东工业大学 | A kind of gas atomizing nozzle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 Termination date: 20190505 |