CN202675280U

CN202675280U - Novel burner of flame scarfing machine

Info

Publication number: CN202675280U
Application number: CN2012203357981U
Authority: CN
Inventors: 杨燕; 姚刚; 易萍; 张成志
Original assignee: SHANGHAI ZHENHUA WELDING TOOLS CO Ltd
Current assignee: SHANGHAI ZHENHUA WELDING TOOLS CO Ltd
Priority date: 2012-07-12
Filing date: 2012-07-12
Publication date: 2013-01-16
Anticipated expiration: 2022-07-12

Abstract

The utility model relates to a novel burner of a flame scarfing machine, and the burner comprises a burner body, a boot block, an upper preheating block seat and an upper preheating block head, a lower preheating block seat and a lower preheating block head; the burner body is fixedly arranged on a distributor; the upper preheating block seat and the lower preheating block seat are fixedly arranged on the burner body and are in parallel; a gap is left between the bottoms of the upper preheating block seat and the lower preheating block seat; one end of the gap is connected with the oxygen outlet of an oxygen distribution rod; the upper preheating block head is fixedly arranged on the upper preheating block seat, and the lower preheating block head is fixedly arranged on the lower preheating block seat; the boot block is fixedly arranged on the burner body through a bolt; 45 gas spray nozzles are uniformly distributed on the lower preheating block head; 45 oxygen spray nozzles and 34 burning spray nozzles are uniformly distributed on the upper preheating block head; and water-cooled channels are arranged on the burner body, the boot block, the upper preheating block seat, the upper preheating block head, the lower preheating block seat and the lower preheating block head. According to the novel burner of the flame scarfing machine, the difference between the peak and the trough of a cleared surface id reduced by improving the uniformity degree of the burning of flame, so that the levelness of a cleared plate ingot is greatly improved, and the needs of a Japanese automobile plate on a rolled plate ingot are met.

Description

A kind of novel hot scarfing machine burner

Technical field

The utility model belongs to metallurgical technology field, is specifically related to a kind of novel hot scarfing machine burner.

Background technology

Hot scarfing machine is to utilize oxygen and coal gas mixed combustion, the surface heating of slab to burning-point, be that then metal can use pure oxygen in high pressure air-flow and steel slab surface metal to produce oxidation reaction with the activation temperature (the carbon steel burning-point of carbon containing 0.25% is 1250 ℃) that oxygen plays vigorous reaction, and the defective of desurfacing, form bright and clean even curface and clear up simultaneously the top, bottom of slab and the defective on two sidepieces with rolling demand (such as Automobile Plate, tin plate, home appliance panel etc.) the scafing function that satisfies the high-quality steel grade, mechanization degree is high.The aspects such as pit, bright band, groove differ, Wave crest and wave trough difference is excessive that the quality of cleaning quality is mainly manifested in whether.Except whether suitable with the technique (for example pressure of oxygen and coal gas, flow) of cleaning; Burner preheating mouth hole is whether stopped up; The inhomogeneous degree of the flame whether aperture accurately causes; The routine use of burner is safeguarded; Whether the degree of depth and speed mate during cleaning operation; The pressure of high pressure granulation flush slag and flow whether rationally and the degree of registration of burner preheat flame and slab the factor such as suitable is relevant, but mathematically be the structure of burner and make precision and cleaning quality is had direct obvious related.The emphasis of this patent is that the multinomial reform measure of the structural design of burner is brought declining to a great extent of steel slab surface Wave crest and wave trough difference.

Summary of the invention

The purpose of this utility model is to propose a kind of novel hot scarfing machine burner.The conduction that makes the distribution of flame and energy rate by the reform on the nozzle structure is homogenising more, the preheat mode that reaches slab is more balanced, thereby make the difference between the slab Wave crest and wave trough after the cleaning more mild, make slab more smooth bright and clean, satisfied the rolling demand of Japanese Automobile Plate.

A kind of novel hot scarfing machine burner that the utility model proposes, formed by body 1, boots piece 6, top preheating block 2 and top preheating build 3, bottom preheating block 4 and bottom preheating build 5, body 1 is the basic part of burner, be fixed on the distributor by bolt 12 and bolt 13, and guide entering of the media such as oxygen, coal G﹠W; Preheating block 2 in top is fixed on the body 1 by set bolt 14 and pin 15, preheating block 4 in bottom is fixed on the body 1 by set bolt 16 and pin 17, top preheating block 2 be arranged in parallel with bottom preheating block 4, form the space of 5 ~ 6mm between top preheating block 2 bottoms and bottom preheating block 4 bottoms, one end in this space connects the gas outlet of oxygen feed rod 11, thereby makes this space as the cleaning oxygen flow passage of ejection from oxygen feed rod 11; Top workpiece preheating block head 3 is bolted on the top preheating block 2, and bottom workpiece preheating block head 5 is bolted on the bottom preheating block 4; Boots piece 6 is fixed on the body 1 by bolt 18, and boots piece 6 is close on the slab and does relative motion with the slab of red heat, and brake pad 7 is welded on boots piece 6 bottoms, damages with boots piece 6 and the direct friction of slab of avoiding the red copper alloy.Be evenly distributed with 45 jet for gas 8 on the bottom workpiece preheating block head 5, be evenly distributed with 45 oxygen jets 9 and 34 burner noz(zle)s 10 on the top workpiece preheating block head 3; Be equipped with water cooling passageway on described body 1, boots piece 6, top preheating block 2 and the bottom preheating block 4.

In the utility model, described jet for gas 8, oxygen jet 9 and burner noz(zle) 10 are take 30mm as a unit, per 5 jet for

gas

8 or 5 oxygen jets 9 form different unit air chambers with burner noz(zle) 10, adjacent air chamber is gas blowby not mutually, when the width of cleaning slab during less than the spread length of a plurality of burners, the flame of the pre-hot nozzle of burner of redundance can utilize moving of piston rod and close like this.

In the utility model, described bottom preheating block 4 is 32 ° with the angle of horizontal plane.

In the utility model, the middle part of described burner noz(zle) 10 is oxygen outlets, is arranged with 4 crescent shape gas passages outward.

In the utility model, bottom workpiece preheating block head 5 and jet for gas 8 end faces are at vertical equal inside indentation 22mm, adjacent jet for gas 8 sides are 2 ° of angles with cleaning oxygen flow passage, and be evagination, relatively prolonged owing to the lengthening of face size the burning time of coal gas, the change that has prolonged burning time, adjacent side and the cleaning oxygen flow face angle of coal gas has guaranteed the degree of purity of cleaning oxygen flow, has reduced the difference of Wave crest and wave trough, has improved the effect of cleaning.

In the utility model, oxygen feed rod 11 on the body 1 is the frontal impact on plane with the zone of cleaning oxygen flow bump, makes more homogenising of air-flow, and catch is made helical form makes air-flow form the eddy current state, strengthened the uniformity coefficient of oxygen flow, reduced favourable to clearing up surperficial Wave crest and wave trough difference.

Nozzle structure reform of the present utility model has following aspect:

1. clearing up Oxygen Flow is the tang that consists of between top, the bottom workpiece preheating block, and cleaning Oxygen Flow and the angle between the steel slab surface of formation change 32 ° into by 35 °.Such air-flow is sharper keen, owing to dwindling of angle, and the resistance when having reduced burner and slab relative motion, when having relative cleaning speed, the cleaning layer depth is more thinner; Perhaps identical cleaning layer depth cleaning speed is faster, and the variation that just looks like carpenter's planing tool setting angle brings the lighter more smooth the same reason of planing, and this reform is particularly evident to the cleaning effect of hot base.

2. top workpiece preheating block and bottom workpiece preheating block are respectively by monoblock type, (per 5 pre-hot nozzles are 1 grade to columned feed rod O type circle circumferential sealing, be divided into 9 grades of 45 nozzles) change split-type structural into, the top workpiece preheating block is split into head and seat section, the bottom workpiece preheating block also is split into head and seat section, its one is connected with burner body, head is fixed with seat section by bolt again, still be 9 grades, every grade of 30mm, control 5 nozzle flames, seal form is then changed into the flat seal of O type ring groove by circumferential sealing, the benefit brought of reform is that the more original circumferential sealing of the processing of annular inside groove flat seal is more convenient reliable like this.As long as use the depth of CNC milling machine assurance groove unanimously, reduced manufacturing cost.When cylindric feed rod originally assembles, needing to use " grain of rice film " to coat silicone oil wraps the feed rod that installs O type circle and slowly fills in the slotted hole that finish reams, take out rapidly the volume that removes photoresist behind the location, in this installation process, very easily break film, such as too loose words O type circle easy to leak.Stud with oxygen, jet for gas on the upper and lower part workpiece preheating block head in addition because baking or slag backwash easily damage, adopts split type after, after damaging as long as the replacing head, consumption and the manufacturing cost of greatly having saved material.

3. workpiece preheating block head in top was equipped with 45 oxygen jets and 45 s' jet for gas originally, burner top workpiece preheating block head after the reform is except keeping 45 oxygen jets, jet for gas changes a kind of novel oxygen and the burner noz(zle) of the direct external mix of coal gas into, the middle part of this nozzle is oxygen outlet, the periphery is 4 crescent shape gas passages, its crescent size is according to oxygen, the combustion ratio of coal gas and design oxygen and coal gas, more can burn fully, flame is more even, efficient hardening to the preheating of slab, the uniformity coefficient of flame temperature and the flatness that improves cleaning are of great benefit to.

4. workpiece preheating block head in bottom has been done the reform of emphasis, the inside indentation 6.8mm of original jet for gas end face, and adjacent side becomes 5 ° angle (indent) with cleaning oxygen flow face.The inside indentation 22mm of lower workpiece preheating block jet for gas end face after the reform, adjacent side becomes 2 ° angle (evagination) with cleaning oxygen flow face, that is to say, jet for gas originally and adjacent side are parastate, jet for gas after the reform and adjacent side are 7 ° of angles, prolonged the burning time of coal gas because the increase of end face indentation size has relatively prolonged the burning time of coal gas.On the direction of gas-fired, change-2 ° into by+5 °, more be conducive to surrounding air and be difficult for being sucked by oxygen, avoid and clear up oxygen flow and mix mutually the generation disturbance with air stream, guaranteed to clear up the degree of purity of oxygen flow; The air-flow that the combustion flame edge of coal gas and cleaning oxygen flow form is closer to parallel airflow.Reduce to greatest extent the upper pit that forms in surface and the excessive disadvantage of difference of Wave crest and wave trough.Also prove in practice positive effect.

Scafing is the chemical reaction of Oxygen Flow and steel with regard to essence, because the gas burner of bottom workpiece preheating block is to consist of (for each piece burner) by 45 nozzles, flame is ejected on the billet surface approximately 6mm of each group injector spacing theoretically, so its burning point will inevitably be variant, the cleaning oxygen flow is average flat air-flow comparatively speaking then, cause like this difference of chemical reaction owing to the difference of preheat flame burning point, thereby cause the Wave crest and wave trough phenomenon on cleaning surface, the difference of preheat flame is obviously reduced, be close to wire flame by point-like flame, the homogenising of flame has been brought the homogenising on cleaning surface, reduced the difference of Wave crest and wave trough, the prune job of practice has also proved above viewpoint.

5. the reform on burner body oxygen feed rod, enter through 9-9 holes from the oxygen of burner distributor input, through an oxygen feed rod 11, by the wide groove of one section flat 2.5mm out, then progressively enter in the wide groove of one section 4.5mm, air-flow spreads homogenized gradually, and the slype from 5 ~ 6mm between the workpiece preheating block plane, upper and lower part discharges at last, forms the cleaning oxygen flow.This feed rod has nine spacer segments, is milled into a plane on every section the face of cylinder, makes the air-flow frontal impact on this plane, pools together after air-flow is uniformly dispersed again.Except staged was amplified gradually, the catch between nine spacer segments was made helical form, made the rear eddy current state that forms of air-flow ejection, had more strengthened the homogenising of Oxygen Flow, reduced favourable to the Wave crest and wave trough difference of clearing up the surface.

The beneficial effect of burner of the present utility model is to make being more evenly distributed of preheat flame, make as far as possible the flame status of ejection be the linear alignment (being similar to) at slab, rather than point-like is arranged, the difference of Wave crest and wave trough of consequently clearing up base is less, the smooth degree of cleaning base greatly improves the requirement of the high Japanese Automobile Plate of rolling quality that can meet the demands.

Description of drawings

Fig. 1 is the utility model nozzle structure figure.

Number in the figure: 1 body, 2 top preheating blocks, 3 top workpiece preheating block heads, 4 bottom preheating blocks, 5 bottom workpiece preheating block heads, 6 boots pieces, 7 brake pads, 8 jet for gas, 9 oxygen jets, 10 burner noz(zle)s, 11 oxygen feed rods, 12 bolts, 13 bolts, preheating block set bolt on 14, workpiece preheating block seat pin nail on 15,16 times preheating block set bolts, 17 times workpiece preheating block seat pin nails, 18 bolts.

The specific embodiment

Further specify the utility model below in conjunction with accompanying drawing.

Embodiment 1:

As shown in Figure 1, the cleaning burner is comprised of four parts such as body 1, boots piece 6, top preheating block 2 and top preheating build 3, bottom preheating block 4 and bottom workpiece preheating blocks 5.Body 1 is the basic part of burner, be installed together with distributor by bolt 12 and bolt 13, and the entering of the media such as guiding oxygen, coal G﹠W, top preheating block 2 utilizes set bolt 14 and pin 15 to be fixed on the body 1, bottom preheating block 4 utilizes bolt 16 and pin 17 to be fixed on the body 1, the centre has formed the space of 5 a narrow ~ 6mm, as the passage of the cleaning oxygen flow of ejection from body oxygen feed rod 11.Top workpiece preheating block head 3 is fixed by bolts on the top preheating block 2, and bottom workpiece preheating block head 5 also is fixed by bolts on the bottom preheating block 4.Boots piece 6 usefulness bolts 18 are fixed on the body 1, are close on the slab and do relative motion with the slab of red heat, are equipped with water cooling passageway in four parts of burner, and the protection burner is heat damage not.Brake pad 7 is welded on the boots piece 6, damages with the direct friction of the boots piece of avoiding the red copper alloy and slab.On the bottom workpiece preheating block head 5 of each burner 45 gas preheating nozzle 8 is arranged, oxygen preheat nozzle 9 and 34 gas-fired mouths 10 of 45 are arranged on the top workpiece preheating block head 3.Single burner 270mm length, be divided into 9 grades, every grade of 30mm, isolate each other, that is to say that per 5 pre-hot nozzles share 1 air chamber, with the mutual gas blowby not of other air chamber, when the width of cleaning slab during less than the spread length of a plurality of burners, the flame of the pre-hot nozzle of burner of redundance can utilize moving of piston rod and close like this.

Cleaning slab thickness 250mm, width 1930mm, single-piece burner width 270mm, 8 cover burners are respectively used in descaling machine top and bottom, and each 1 burner is used in both sides, add up to and use 8+8+1+1=18 burner, be distributed in upper and lower horizontal plane and two sidepieces of slab, the width of plate slab that can cover is greater than 1930mm, and thickness is greater than 250mm, 45 * 8=360 preheating gas nozzle 8 arranged, for bottom workpiece preheating block head 5 preheating slabs on the whole horizontal plane in preheating gas hole.Be furnished with 45 * 8=360 preheated oxygen nozzle 9 on the top workpiece preheating block head 3 and 34 * 8=272 burner noz(zle) 10 is used as the strengthening preheating slab.Upper horizontal plane has 8 groups of boots pieces 6; the above is welded with 8 * 5=40 group brake pad 7; be not damaged in movement with the protection burner, above member bodies 1, top preheating block 2, top workpiece preheating block head 3 and bottom preheating block 4, bottom workpiece preheating block head 5, boots piece 6 all are in continuously among the water circulation.

When beginning to clear up; coal gas by bottom workpiece preheating block head 5 jet for gas 8 ejection beginning; preheating also forms a heating tape; slightly cross several seconds top workpiece preheating block head oxygen jet 9 and burner noz(zle) 10 of 3 and begin to form stronger preheat flame; reach fast the heating burning-point of metal; then under the effect of pure oxygen high pressure cleaning oxygen flow, metal surface produces chemical reaction and forms slag, is blown off by high pressure granulation water together with defective.Because Gas Flow, the Oxygen Flow of burner after the reform is more even, the flame energy rate more reaches unanimity, and the difference of the slab Wave crest and wave trough after the cleaning is reduced widely, to satisfy effectively the rolling requirement of Japanese Automobile Plate.

Claims

1. novel hot scarfing machine burner, formed by body (1), boots piece (6), top preheating block (2), top preheating build (3), lower preheating block (4) and lower preheating build (5), it is characterized in that body (1) is fixed on the distributor by bolt (12) and bolt (13); Top preheating block (2) is fixed on the body (1) by set bolt (14) and pin (15), bottom preheating block (4) is fixed on the body (1) by set bolt (16) and pin (17), top preheating block (2) be arranged in parallel with bottom preheating block (4), form the space of 5 ~ 6mm between top preheating block (2) bottom and bottom preheating block (8) top, one end in this space connects the gas outlet of oxygen feed rod (11), and this space is as the passage of the cleaning oxygen flow of ejection from oxygen feed rod (11); Top workpiece preheating block head (3) is bolted on the top preheating block (2), and bottom workpiece preheating block head (5) is bolted on the bottom preheating block (4); Boots piece (6) is fixed on the body (1) by bolt (18), boots piece (6) is close on the slab and does relative motion with the slab of red heat, brake pad (7) is welded on boots piece (6) bottom, be evenly distributed with 45 jet for gas (8) on the bottom workpiece preheating block head (5), be evenly distributed with 45 oxygen jets (9) and 34 burner noz(zle)s (10) on the top workpiece preheating block head (3); Be equipped with water cooling passageway on described body (1), boots piece (6), top preheating block (2) and the bottom preheating block (4).

2. novel hot scarfing machine burner according to claim 1, it is characterized in that described jet for gas (8), oxygen jet (9) and burner noz(zle) (10) are take 30mm as a unit, per 5 jet for gas (8) or 5 oxygen jets (9) and burner noz(zle) (10) form different unit air chambers, and adjacent air chamber is gas blowby not mutually.

3. novel hot scarfing machine burner according to claim 1 is characterized in that described bottom preheating block (4) and the angle of horizontal plane are 32 °.

4. novel hot scarfing machine burner according to claim 1 is characterized in that the middle part of described burner noz(zle) (10) is oxygen outlet, is arranged with 4 crescent shape gas passages outward.

5. novel hot scarfing machine burner according to claim 1, it is characterized in that bottom workpiece preheating block head (5) and jet for gas (8) end face are at vertical equal inside indentation 22mm, adjacent jet for gas (8) side is 2 ° of angles with cleaning oxygen flow passage, and jet for gas (8) side is evagination.