CN215544783U - Industrial gas cutting nozzle with cutting oxygen flow velocity of 2.3 Mach - Google Patents
Industrial gas cutting nozzle with cutting oxygen flow velocity of 2.3 Mach Download PDFInfo
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- CN215544783U CN215544783U CN202122332752.6U CN202122332752U CN215544783U CN 215544783 U CN215544783 U CN 215544783U CN 202122332752 U CN202122332752 U CN 202122332752U CN 215544783 U CN215544783 U CN 215544783U
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Abstract
The utility model relates to the technical field of cutting nozzles, in particular to an industrial gas cutting nozzle with cutting oxygen flow velocity of Mach 2.3. The cutting nozzle comprises a shell, a cutting oxygen channel is arranged along the axial direction of the shell, a plurality of preheating oxygen channels and gas channels are arranged around the cutting oxygen channel, and the preheating oxygen channels and the gas channels are communicated in the shell to form a mixed gas channel; the cutting oxygen channel adopts aerodynamic design, and the whole molded line is streamline. The utility model can improve the flow velocity of oxygen gas for cutting by the cutting nozzle, so that the flow velocity reaches the supersonic speed of Mach 2.3, the cutting speed is improved, and the quality of a cutting section is improved.
Description
Technical Field
The utility model relates to the technical field of cutting nozzles, in particular to an industrial gas cutting nozzle with cutting oxygen flow velocity of Mach 2.3.
Background
The basic characteristics of the metallurgy continuous casting cutting technology are high speed, high quality, high stability and long service life. Continuous casting and cutting technology has been introduced by some countries in europe, and the cutting oxygen flow velocity of some technologies in germany has reached supersonic speed of mach 2.2 so far. The cutting oxygen flow rate is increased, so that the cutting speed and the cutting thickness are increased, namely, the cutting efficiency and the cutting capacity are improved. However, the cutting oxygen flow velocity is required to reach a higher velocity, and still needs to be solved at present.
SUMMERY OF THE UTILITY MODEL
In view of the above disadvantages and shortcomings of the prior art, the present invention provides an industrial gas cutting nozzle with cutting oxygen flow velocity of mach 2.3, which can increase the cutting oxygen flow velocity of the cutting nozzle to reach supersonic speed of mach 2.3, increase cutting speed, and improve quality of cutting section.
In order to achieve the purpose, the utility model adopts the main technical scheme that:
the utility model provides an industrial gas cutting nozzle with cutting oxygen flow velocity of Mach 2.3, which comprises a shell, wherein a cutting oxygen channel is arranged along the axial direction of the shell, a plurality of preheating oxygen channels and gas channels are arranged around the cutting oxygen channel, and the preheating oxygen channels and the gas channels are communicated in the shell to form a mixed gas channel; the integral molded line for cutting the oxygen channel is streamline.
Furthermore, the cutting oxygen channel comprises a cutting oxygen inlet, a throat part and a cutting oxygen outlet, the diameter of the cutting oxygen channel sequentially comprises the throat part, the cutting oxygen outlet and the cutting oxygen inlet from small to large, and the throat part is arranged close to the cutting oxygen outlet.
Further, the diameter of the throat part is 2.3-3.3 mm.
Further, the ratio of the cutting oxygen outlet diameter to the throat diameter was 1.5.
Further, the included angle between the axis of the mixture passage and the axis of the cutting oxygen passage is 4 °.
Further, the cutting oxygen inlet pressure was 1.2MPa, and the cutting oxygen outlet flow wasThe oxygen flow rate of the discharged cutting is 60Nm3/h。
Further, the preheating oxygen pressure input by the preheating oxygen channel is 0.2-0.6MPa, and the preheating oxygen flow is 19Nm3/h。
Further, the gas pressure input by the gas channel is 0.15-0.3MPa, and the gas flow is 8Nm3/h。
The utility model relates to a cutting process of an industrial gas cutting nozzle with the cutting oxygen flow velocity of Mach 2.3, which comprises the following steps:
s1, preheating oxygen, and YT-2 type novel industrial fuel gas by a fuel gas channel through a preheating oxygen channel, wherein the preheating oxygen and the YT-2 type novel industrial fuel gas adopt 3.5: 1, mixing the mixture in the cutting nozzle to obtain mixed gas, and spraying the mixed gas out of the cutting nozzle through a mixed gas channel for combustion to form preheated oxygen flame;
s2, setting the mixed gas channel to incline to the axial direction of the cutting oxygen channel;
s3, the whole molded line of the cutting oxygen channel arranged in the middle of the shell is streamline, and supersonic oxygen flow is formed, wherein the speed can reach Mach 2.3.
The utility model has the beneficial effects that:
1. the utility model improves the flow velocity of cutting oxygen flow, reaches 2.3M, improves the cutting speed by 5-10 percent compared with an imported continuous casting cutting torch, and improves the production efficiency;
2. the utility model adopts the design of focusing flame, thus improving the heating effect and the quality of the cut section;
3. due to the improvement of the production efficiency, the consumption of energy media such as gas and the like is reduced, the carbon emission is further reduced, and corresponding contribution is made to the environmental-friendly emission;
4. the utility model realizes the metallurgy continuous casting cutting production application, the metallurgy continuous casting cutting process equipment and the process technology progress thereof by making the production cutting process rule, and the metallurgy continuous casting cutting process equipment and the process technology progress are up to and exceeding similar products.
Drawings
FIG. 1 is a schematic structural view of an industrial gas cutting torch according to the present invention, in which the cutting oxygen flow velocity is Mach 2.3;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a graph of a cutting oxygen channel.
In the figure: 1. a housing; 2. cutting an oxygen channel; 21. cutting an oxygen inlet; 22. a throat; 23. cutting an oxygen outlet; 3. preheating an oxygen channel; 31. preheating an oxygen inlet; 4. a gas channel; 41. a gas inlet; 5. a mixed gas channel; 51. and (5) a mixed gas outlet.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
Example 1:
referring to fig. 1 and 2, the present invention provides an industrial gas cutting torch having a cutting oxygen flow velocity of mach 2.3. The cutting nozzle comprises a shell 1, a cutting oxygen channel 2, a preheating oxygen channel 3 and a fuel gas channel 4. The preheating oxygen channel 3 and the fuel gas channel 4 are crossed in the shell 1 of the cutting nozzle to form a mixed gas channel 5. The mixed gas channel 5 is uniformly provided with 18 holes along the circumference of one side of the air outlet of the shell 1, and the axis of the mixed gas channel 5 and the axis of the cutting oxygen channel 2 form an included angle of 4 degrees.
Specifically, the cutting oxygen passage 2 includes a cutting oxygen inlet 21, a throat 22, and a cutting oxygen outlet 23. The diameter of the cutting oxygen inlet is from small to large, the cutting oxygen outlet 23 and the cutting oxygen inlet 21 are arranged in sequence, and the throat 22 is arranged close to the cutting oxygen outlet 23. The diameter variation from the cutting oxygen inlet 21 to the cutting oxygen outlet 23 is: the diameter size is unchanged from the cutting oxygen inlet 21 until the joint of the cutting oxygen inlet 21 and the throat 22 begins to decrease in an arc, and is unchanged after the cutting oxygen inlet and the throat 22 decrease, and finally, the diameter size begins to increase in an arc until the joint of the throat 22 and the cutting oxygen outlet 23 begins to increase in a linear manner.
Wherein, referring to fig. 3, the abscissa is the axial direction of the cutting oxygen passage 2, and the ordinate is the radial direction of the cutting oxygen passage 2. The cutting oxygen channel 2 is designed by adopting an aerodynamic principle, the integral line is a streamline curve which accords with the aerodynamic design, the design is reasonable, the resistance is small, the flow speed of the cutting oxygen reaches the supersonic speed of 2.3M, the cutting speed is effectively improved, and the kinetic energy of the cutting oxygen flow is improved, so that the penetrating power of the cutting billet and the slag discharge capacity are improved, and the cutting quality is improved.
When the cutting nozzle cuts continuous casting steel billets with different thicknesses, the diameters of the throats 22 with different sizes are adopted for the cutting oxygen channel 2, and the channel size is correspondingly changed; its major dimensions are shown in table 1;
TABLE 1 three cutting torches of different sizes
A cutting technology for a novel industrial gas cutting nozzle with cutting oxygen flow velocity of 2.3 Mach adopts preheating oxygen and YT-2 type novel industrial gas to form preheating oxygen flame for cutting. The specific process is as follows:
s1, preheating oxygen and YT-2 type novel industrial fuel gas, wherein the mass ratio of the preheating oxygen to the YT-2 type novel industrial fuel gas is 3.5: 1, mixing the mixture in the cutting nozzle, and then spraying and burning the mixture to form preheating flame, wherein the flame is stable and the temperature is high;
s2, the mixed gas channel 5 is designed into an inclined hole, the included angle between the axis of the inclined hole and the axis of the cutting torch is 4 degrees, and the number of the inclined holes is 18, so that the design effectively improves the flame concentration, improves the heating effect, and is beneficial to improving the width of the cutting seam and the cutting quality;
s3, designing the middle cutting oxygen channel 2 by adopting an aerodynamic principle to form supersonic oxygen flow, wherein the speed can reach Mach 2.3;
s4, in order to meet the requirements of different cutting thicknesses, the diameters of the throat parts 22 of the cutting oxygen pore canals are respectively designed to be different sizes such as 2.3mm, 2.6mm, 3.3mm and the like.
When cutting continuous casting steel billets with different thicknesses, selecting the throat 22 diameters Dc of different cutting nozzles, specifically:
when the thickness of the steel billet is 100 and 200mm, the diameter of the throat part 22 of the cutting nozzle is 2.3 mm;
when the thickness of the steel billet is 200 and 260mm, the diameter of the throat part 22 of the cutting nozzle is 2.6 mm;
when the thickness of the steel billet is 300-400mm, the diameter of the throat part 22 of the cutting nozzle is 3.3 mm.
Compared with the prior art, the cutting torch can improve the cutting speed by 5-15%; and effectively improve cutting quality, hang the advantage such as sediment less.
As shown in fig. 1 and 2, the tip cutting material was a low alloy steel having a thickness of 320 mm.
The mixture outlets 51 of the mixture channels 5 are arranged in a ring-like manner around the cutting tip in the cutting torch.
The cutting process using the cutting torch of the utility model has the following specifications:
the pressure of a cutting oxygen inlet 21 which is introduced into the cutting oxygen channel 2 is 1.2MPa,
the cutting oxygen flow from the cutting nozzle out of the cutting oxygen outlet 23 is 60Nm3/h，
The preheated oxygen pressure inputted from the preheated oxygen inlet 31 of the preheated oxygen passage 3 was 1.0PMPa,
the preheating oxygen gas flow rate flowing in from the preheating oxygen gas inlet 31 of the preheating oxygen gas channel 3 is 19Nm3/h，
The gas pressure input from the gas inlet 41 of the gas channel 4 is 0.2MPa,
the flow rate of the gas flowing in from the gas inlet 41 of the gas passage 4 was 8Nm 3/h.
The cutting speed of the cutting nozzle and the process specification is 350 mm/min, so that the cutting speed is improved by 8% compared with that of an imported cutting nozzle. The cut section is smooth and belongs to a high-quality section.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.
Claims (8)
1. The industrial gas cutting nozzle with the cutting oxygen flow velocity of 2.3 Mach is characterized in that: the cutting oxygen channel is arranged along the axial direction of the shell, a plurality of preheating oxygen channels and gas channels are arranged around the cutting oxygen channel, and the preheating oxygen channels and the gas channels are communicated in the shell to form a mixed gas channel; the integral molded line for cutting the oxygen channel is streamline.
2. An industrial gas cutting torch having a cutting oxygen flow velocity of mach 2.3 according to claim 1, wherein: the cutting oxygen channel comprises a cutting oxygen inlet, a throat part and a cutting oxygen outlet, the diameter of the cutting oxygen channel sequentially comprises the throat part, the cutting oxygen outlet and the cutting oxygen inlet from small to large, and the throat part is arranged close to the cutting oxygen outlet.
3. An industrial gas cutting torch having a cutting oxygen flow velocity of mach 2.3 according to claim 2, wherein: the diameter of the throat part is 2.3-3.3 mm.
4. An industrial gas cutting torch having a cutting oxygen flow velocity of mach 2.3 according to claim 2, wherein: the ratio of the cutting oxygen outlet diameter to the throat diameter was 1.5.
5. An industrial gas cutting torch having a cutting oxygen flow velocity of mach 2.3 according to claim 1, wherein: the included angle between the axis of the mixed gas channel and the axis of the cutting oxygen channel is 4 degrees.
6. An industrial gas cutting torch having a cutting oxygen flow velocity of mach 2.3 according to claim 1, wherein: the cutting oxygen inlet pressure is 1.2Mpa, and the cutting oxygen flow flowing out from the cutting oxygen outlet is 60Nm3/h。
7. An industrial gas cutting torch according to claim 1 having a cutting oxygen flow velocity of mach 2.3,the method is characterized in that: the preheating oxygen pressure input by the preheating oxygen channel is 0.2-0.6MPa, and the preheating oxygen flow is 19Nm3/h。
8. An industrial gas cutting torch having a cutting oxygen flow velocity of mach 2.3 according to claim 1, wherein: the gas pressure input by the gas channel is 0.15-0.3MPa, and the gas flow is 8Nm3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122332752.6U CN215544783U (en) | 2021-09-26 | 2021-09-26 | Industrial gas cutting nozzle with cutting oxygen flow velocity of 2.3 Mach |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122332752.6U CN215544783U (en) | 2021-09-26 | 2021-09-26 | Industrial gas cutting nozzle with cutting oxygen flow velocity of 2.3 Mach |
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| Publication Number | Publication Date |
|---|---|
| CN215544783U true CN215544783U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122332752.6U Active CN215544783U (en) | 2021-09-26 | 2021-09-26 | Industrial gas cutting nozzle with cutting oxygen flow velocity of 2.3 Mach |
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| CN (1) | CN215544783U (en) |
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- 2021-09-26 CN CN202122332752.6U patent/CN215544783U/en active Active
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