CN102997243B - Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot - Google Patents
Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot Download PDFInfo
- Publication number
- CN102997243B CN102997243B CN201210471775.8A CN201210471775A CN102997243B CN 102997243 B CN102997243 B CN 102997243B CN 201210471775 A CN201210471775 A CN 201210471775A CN 102997243 B CN102997243 B CN 102997243B
- Authority
- CN
- China
- Prior art keywords
- cutting
- cutting torch
- low
- duct
- steel ingot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Gas Burners (AREA)
Abstract
The invention provides a cutting torch for cutting an ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot and belongs to the technical field of the ultrahigh-thickness low-carbon steel ingot oxygen cutting device. The invention aims to solve the technical problem in the background art that the 2000-3500 mm ultrahigh-thickness low-carbon and low-alloy steel ingot cannot be cut at high efficiency and good quality. The cutting torch is mainly characterized in that preheating oxygen and propane gas are not mixed inside the cutting tip of the cutting torch at first, and mixed and burnt in atmosphere after being jet out of the cutting torch instead, a preheating oxygen duct (5) and a gas duct (6) both are inclined toward the axis of the cutting torch, the diameter of the throat part of a large-flow cutting oxygen cutting tip (7) is 17-22 mm, each gas duct (6) is designed into a structure with the lower part thereof slightly spread, and the diameter of the inlet thereof is 4.5 mm, the spreading taper angle is 1.146% and the length of the spreading section is 8 mm. The cutting torch provided by the invention is suitable for good-quality and high-efficiency cutting of the ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot.
Description
Invention field
The present patent application proposes a kind of cutting torch cutting ultra-thick 2500 ~ 3500 ㎜ low-carbon (LC) and low-alloy steel ingot, belong to the technical field of ultra-thick mild steel ingot oxygen cutter sweep, refer more particularly to low-carbon (LC) and the high-quality of low-alloy steel ingot, the high efficiency cutting torch of 2500 ~ 3500 ㎜ thickness or diameter.
Background technology
21 century basis manufacturing equipment level be mainly reflected in several aspects such as maximization, high accuracy, high efficiency, low cost and high flexibility.Maximization is one of key character preparing manufacturing industry high-end product.Manufacture main equipment and large foundation manufacturing equipment, just need large-scale even superhuge casting/forging as blank to manufacture the parts of Large-Scale Equipment.And the first operation that Big Steel Castings/forging carries out processing is exactly will remove the rising head of part and spare volume and weight by cutting to meet the requirements of size, shape and weight, so the gas flame cuttiug thickness of heavy casting and forging and quality be directly connected to the size of the workload of following process and energy resource consumption number, therefore superhuge casting/forging ultra-thick flame-cutting plant can require create basis for the manufacturing equipment high-quality, high efficiency, low energy consumption etc. proposed that maximize.
In current method for hot cutting, laser cutting method maximum cutting thickness is no more than 30 ㎜, plasma cut method can reach 180 ㎜, oxygen patterning method also can only reach 1500 ~ 1800 ㎜, in order to cut 2000 ~ 3500 ㎜ ultra-thick steel ingots, current oxygen cutting device also should improve further.
Summary of the invention
In order to solve the oxygen patterning method cutting low-carbon (LC) that exists in background technology and low-alloy steel ingot thickness does not reach the problem of 2000 ~ 3500mm, the present invention proposes a kind of ultra-thick mild steel ingot oxygen cutting cutting torch that can cut 2000 ~ 3500 ㎜.
Technical scheme of the present invention is as follows:
1, cut a cutting torch for ultra-thick 2000 ~ 3500 ㎜ Ultra-low carbon and low-alloy steel ingot, employing oxygen is cutting gas, and
3:1 ratio give hot oxygen and propane combustion gas mixing gas gives thermal-flame as cutting,
It is characterized in that,
1) hot oxygen and propane combustion gas hybrid combination outside cutting torch are given in employing, namely hot oxygen duct (5) is given and combustion gas duct (6) do not intersect in cutting torch inside, give hot oxygen and combustion gas is not pre-mixed in cutting torch inside, and mixed combustion in an atmosphere after the cutting torch (7) of ejection cutting oxygen, this structure is conducive to cutting ultra-thick workpiece;
2) between the axis of combustion gas duct (6) and the axis of cutting torch, angle is 4 °, the angle given between the axis of hot oxygen duct (5) and the axis of cutting torch is 12 °, combustion gas duct (6) and give hot oxygen duct (5) and all tilt and point to the axis of cutting torch, this combustion gas duct (6) and give being configured with to be beneficial to improve and giving the heating effect of hot mist to cut workpiece of hot oxygen duct (5).
3) adopt the cutting torch (7) of large scale cutting oxygen, this cutting torch (7) throat diameter is 17 ~ 22 ㎜;
4) above-mentioned each combustion gas duct (6) is designed to the structure that spreads a little bottom, and namely the inlet diameter of combustion gas duct (6) is 4.5 ㎜, and diffusion tapering is 1.146%, and diffuser length is 8 ㎜.
2, a kind of cutting torch cutting ultra-thick 2000 ~ 3500 ㎜ low-carbon (LC) and low-alloy steel ingot according to claim 1,
It is characterized in that,
The low-carbon (LC) of cutting different-diameter or thickness and low-alloy steel ingot, select different, the throat diameter of cutting torch (7),
When low-carbon (LC) and low-alloy steel ingot thickness or diameter are 2000 ~ 2500 ㎜, the throat diameter of cutting torch (7) is 17 ㎜,
When low-carbon (LC) and low-alloy steel ingot thickness or diameter are 2500 ~ 3000 ㎜, the throat diameter of cutting torch (7) is 19 ㎜,
When low-carbon (LC) and low-alloy steel ingot thickness or diameter are 3000 ~ 3500 ㎜, the throat diameter of cutting torch (7) is 22 ㎜,
Compared with the prior art, cutting torch of the present invention can cut low-carbon (LC) and the low-alloy steel ingot of 2000 ~ 3500 ㎜ ultra-thicks, and has the advantages such as quality of cut face is good, joint-cutting is narrow, granular residue is few.
Cutting torch of the present invention is that the cutting of ultra-thick high-efficiency high-quality provides desirable best gas flame cuttiug equipment.
Accompanying drawing explanation
Fig. 1. a kind of structural representation cutting ultra-thick 2000 ~ 3500 ㎜ low-carbon (LC) and low-alloy steel ingot cutting torch of the present invention;
Fig. 2. the side view cutaway drawing of Fig. 1, this figure and Fig. 1 matches, and represents the overall structure of this cutting torch;
Fig. 3. the partial enlarged drawing A of the cutting torch of Fig. 1, represents the structure of this cutting torch head;
Fig. 4. the B of Fig. 3, to end view drawing, represents the distribution giving hot oxygen duct (5) combustion gas duct (6) and cutting torch (7) in cutting torch;
Fig. 5. the partial enlarged drawing C of Fig. 3, represents the shape and size in combustion gas duct (6) in cutting torch.
Fig. 6. for the shape and size figure of the cutting torch (7) of the low-carbon (LC) and low-alloy steel ingot that cut different-thickness.
Fig. 1 and Fig. 2 matches, represent the overall structure of this cutting torch, this cutting torch mainly comprises and gives hot oxygen input pipe 1, cutting oxygen input pipe 2, air inlet duct 3, propane gas inlet pipe 4. represents as Fig. 3 and Fig. 4, gives hot oxygen by being divided into two breeches pipe roads by what give that hot oxygen input pipe 1 inputs, and what finally enter some annular spread of cutting torch end annular distribution gives hot oxygen duct 5 and spray from cutting torch; Similar, the combustion gas that propane combustion gas is inputted by gas inlet pipe 4 is by after being divided into two breeches pipe roads, and finally enter the combustion gas duct 6 of some annulars of cutting torch end distribution and spray from cutting torch, the air that air inlet duct 3 inputs is for cooling cutting torch.
Fig. 3 and Fig. 5 clearly shows, combustion gas duct 6 is given hot oxygen duct 5 and is all obliquely installed, namely the axis in each burning duct 6 is all 4 ° with the axis angle of cutting torch, it is each that to give angle between the axis in hot oxygen duct 5 and the axis of cutting torch be 12 °, and combustion gas duct 6 and give the axis that cutting torch is all pointed in hot oxygen duct 5.Combustion gas duct 6 and give hot oxygen duct 5 this be configured with to be beneficial to improve give the heating effect of hot mist to cut workpiece.
Above-mentioned Fig. 3 and Fig. 4 also shows, gives hot oxygen duct (5) and combustion gas duct (6) all with the end of annular distribution at cutting torch, and tilts with the axis of certain angle to cutting torch.Cutting torch this configuration ensure from cutting torch ejection give hot oxygen and combustion gas is not pre-mixed in cutting torch inside, and ejection cutting torch after mixed combustion in an atmosphere, the cutting of the favourable ultra-thick workpiece of this structure of cutting torch.Should illustrate, that points out above gives being obliquely installed of hot oxygen duct 5 and combustion gas duct 6, and what be conducive to mixing gives the heating effect of hot gas to cut workpiece.
The structure that what Fig. 5 represented is combustion gas duct 6 is concrete and size, this combustion gas duct 6 is bottoms is diffused structure a little, and its inlet diameter is 4.5 ㎜, and diffusion tapering 1.146%, diffusion length is 8 ㎜.This structure in combustion gas duct 6 is also conducive to cutting torch and gives thermal effect to cut workpiece.
Fig. 6 adopts concrete shape and the size of cutting torch 7 when representing cutting torch cutting different-thickness low-carbon (LC) and low-alloy steel ingot.When the throat diameter of cutting torch 7 changes, the size of the other parts of cutting torch 7 also has corresponding change.
Cutting torch 7 can be divided into contraction section, throat and diffuser three part, and the size of each several part is as shown in table 1,
Three kinds of cutting torch 7 of table 1 different size
As can be seen from Table 1, when the throat diameter of cutting torch 7 changes, only its outlet diameter and diffuser length have certain change, and other spot size does not change.
Embodiment 1:
Bar is 25Cr1Mo steel alloy with cutting torch cutting material as shown in Figures 1 to 3 of the present invention, and the thickness of this steel alloy is 3100 ㎜.
Cutting torch 7 surrounding in cutting torch arranges preheat oxygen duct 5 and the combustion gas duct 6 of some annular distribution.The technological specification utilizing cutting torch of the present invention to cut is as follows:
The cutting oxygen inlet pressure passing into cutting oxygen input pipe 2 is 1.0MPa,
The cutting oxygen flow flowed out by cutting torch 7 is 1400Nm
3/ h,
The preheat oxygen pressure inputted by preheat oxygen input pipe 1 is 1.0PMPa,
The preheat oxygen flow flowed out by preheating duct 5 is 420Nm
3/ h,
The gaseous-pressure inputted by gas inlet pipe 4 is 0.2MPa,
The gas flow flowed out by combustion gas duct 6 is 140Nm3/h;
The cutting speed of above-mentioned cutting torch and technological specification is utilized to be 15 ㎜/min.
Complete material cutting, cutting section is smooth, belongs to high-quality section.
Claims (2)
1. cut a cutting torch for ultra-thick 2000 ~ 3500 ㎜ low-carbon (LC) and low-alloy steel ingot, employing oxygen is cutting gas, and adopts the preheated oxygen of 3:1 ratio and propane combustion gas mixing gas as cutting preheating gas, it is characterized in that,
1) adopt preheat oxygen and propane combustion gas in the outer hybrid cutting torch structure of cutting torch, namely preheating duct (5) and combustion gas duct (6) do not intersect in cutting torch inside, preheat oxygen and propane combustion gas are not pre-mixed in cutting torch inside, and mixed combustion in an atmosphere after ejection cutting torch, this structure is conducive to cutting ultra-thick workpiece;
2) between the axis of combustion gas duct (6) and the axis of cutting torch, angle is 4 °, angle between the axis in preheat oxygen duct (5) and the axis of cutting torch is 12 °, combustion gas duct (6) and preheat oxygen duct (5) all tilt and point to the axis of cutting torch, and this combustion gas duct (6) and being configured with of preheat oxygen duct (5) are beneficial to raising preheating mist to the heating effect of cut workpiece;
3) adopt large discharge cutting oxygen cutting torch (7), the throat diameter of this cutting torch (7) is 17 ~ 22mm;
4) above-mentioned each combustion gas duct (6) is designed to the structure that spreads a little bottom, and namely the inlet diameter of combustion gas duct (6) is 4.5mm, and diffusion cone angle is 1.146 °, and diffuser length is 8mm.
2. a kind of cutting torch cutting ultra-thick 2000 ~ 3500 ㎜ low-carbon (LC) and low-alloy steel ingot according to claim 1, is characterized in that:
Select the mild steel ingot of the throat diameter cutting different-thickness of different size cutting torch (7), namely
When low-carbon (LC) and low-alloy steel ingot thickness or diameter are 2000 ~ 2500 ㎜, the throat diameter of cutting torch (7) is 17 ㎜,
When low-carbon (LC) and low-alloy steel ingot thickness or diameter are 2500 ~ 3000 ㎜, the throat diameter of cutting torch (7) is 19 ㎜,
When low-carbon (LC) and low-alloy steel ingot thickness or diameter are 3000 ~ 3500 ㎜, the throat diameter of cutting torch (7) is 22 ㎜.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210471775.8A CN102997243B (en) | 2012-11-20 | 2012-11-20 | Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot |
| PCT/CN2013/072787 WO2014079179A1 (en) | 2012-11-20 | 2013-03-18 | Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot and cutting process of the cutting torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210471775.8A CN102997243B (en) | 2012-11-20 | 2012-11-20 | Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102997243A CN102997243A (en) | 2013-03-27 |
| CN102997243B true CN102997243B (en) | 2015-05-20 |
Family
ID=47926157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210471775.8A Active CN102997243B (en) | 2012-11-20 | 2012-11-20 | Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102997243B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114905174A (en) * | 2022-05-18 | 2022-08-16 | 东北石油大学 | Plasma-flame coaxial composite cutting process for nuclear power thick-wall stainless steel complex pipe fitting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2358343Y (en) * | 1998-12-30 | 2000-01-12 | 上海五钢(集团)有限公司 | Nozzle of flame cutting torch |
| CN2403538Y (en) * | 1999-11-03 | 2000-11-01 | 李公 | Multi-oxygen hole and multiple atomization ring cutting torch |
| CN2614311Y (en) * | 2003-04-21 | 2004-05-05 | 李天成 | Dual-purpose gas-liquid cutting torch |
| CN2826185Y (en) * | 2005-03-09 | 2006-10-11 | 李天成 | Self-priming cutting torch head |
| CN101769440A (en) * | 2008-12-28 | 2010-07-07 | 崔玥 | Multi-stage switching gas circuit |
| CN201885233U (en) * | 2010-11-22 | 2011-06-29 | 周广旺 | Billet cutting balanced-pressure energy-saving cutting nozzle |
-
2012
- 2012-11-20 CN CN201210471775.8A patent/CN102997243B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2358343Y (en) * | 1998-12-30 | 2000-01-12 | 上海五钢(集团)有限公司 | Nozzle of flame cutting torch |
| CN2403538Y (en) * | 1999-11-03 | 2000-11-01 | 李公 | Multi-oxygen hole and multiple atomization ring cutting torch |
| CN2614311Y (en) * | 2003-04-21 | 2004-05-05 | 李天成 | Dual-purpose gas-liquid cutting torch |
| CN2826185Y (en) * | 2005-03-09 | 2006-10-11 | 李天成 | Self-priming cutting torch head |
| CN101769440A (en) * | 2008-12-28 | 2010-07-07 | 崔玥 | Multi-stage switching gas circuit |
| CN201885233U (en) * | 2010-11-22 | 2011-06-29 | 周广旺 | Billet cutting balanced-pressure energy-saving cutting nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102997243A (en) | 2013-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108655626A (en) | A kind of heating device for product weld preheating | |
| CN102997243B (en) | Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot | |
| CN201636866U (en) | Supersonic flame cutting torch | |
| CN102950359B (en) | 2000-to-3500mm super-thick low-carbon and low-alloy steel ingot cutting process | |
| CN204127955U (en) | Combustion gas oxygen enrichment spray gun | |
| CN202371722U (en) | Torch type heater of natural gas | |
| CN102423824B (en) | Disassembly method of damaged bridge pipe of coke oven | |
| CN201269528Y (en) | Heater of bell type annealing furnace | |
| CN202947136U (en) | Oxyhydrogen fuel gas cutting gun and cutting nozzle thereof | |
| CN2358343Y (en) | Nozzle of flame cutting torch | |
| WO2019114184A1 (en) | Effect-increasing and energy-saving cutting method for continuous casting steel blank | |
| WO2014079179A1 (en) | Cutting torch for cutting ultrahigh-thickness 2000-3500 mm low-carbon and low-alloy steel ingot and cutting process of the cutting torch | |
| CN201944854U (en) | Cutting nozzle | |
| CN204449681U (en) | Electric arc plane cuts system and electric arc plane cuts bar | |
| CN2911443Y (en) | Flame cutting torch of large slab gas cutting apparatus | |
| CN2937840Y (en) | Oxyhydrogen flame cutter nozzle | |
| CN104456566A (en) | Acetylene gas spray nozzle with massive structure | |
| CN202747354U (en) | Welding auxiliary device | |
| CN102328042B (en) | Integral continuous casting cutting nozzle and processing method thereof | |
| CN206912457U (en) | A kind of steel material blank automatic feed preparation device | |
| CN101012931B (en) | Steel-smelting continuous casting cutting nozzle | |
| CN202224806U (en) | Injection type industrial gas welding-cutting torch | |
| CN205662537U (en) | Multi -functional rifle on efflux type tied in a bundle | |
| CN204893148U (en) | High efficiency cutting machine | |
| CN220312100U (en) | Laser-flame composite cutting head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 150028 No. 2077, Chuangxin Road, Harbin, Heilongjiang, Songbei Patentee after: HARBIN WELDING INSTITUTE Ltd. Address before: 150080 No. 111 Hexing Road, Nangang District, Heilongjiang, Harbin Patentee before: HARBIN WELDING INSTITUTE, CHINA ACADEMY OF MACHINERY SCIENCE AND TECHNOLOGY |