CN104359710A - Automatic-demoulding molten steel sampler and use method thereof - Google Patents
Automatic-demoulding molten steel sampler and use method thereof Download PDFInfo
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- CN104359710A CN104359710A CN201410639765.XA CN201410639765A CN104359710A CN 104359710 A CN104359710 A CN 104359710A CN 201410639765 A CN201410639765 A CN 201410639765A CN 104359710 A CN104359710 A CN 104359710A
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Abstract
The invention relates to an automatic-demoulding molten steel sampler and a use method thereof, belonging to the field of iron and steel metallurgy technologies; the automatic-demoulding molten steel sampler comprises a sampling cylinder and a demoulding device; the upper part of the sampling cylinder is open; a locating cover and a convex plug are arranged at the lower part of the sampling cylinder; a locating through hole is formed in the locating cover; a locating protruding block corresponding to the locating through hole is arranged on the convex plug; the locating cover and the convex plug are matched with the locating protruding block through the locating through hole; the side wall of the sampling cylinder is a double-layer structure; a heating agent is arranged in the clearance between the inner wall and the outer wall; the demoulding device comprises a bracket; a hydraulic cylinder is arranged at the upper part of the bracket and connected to a hydraulic pump; a movable chuck and a demoulding base are respectively arranged in the middle part and the lower part of the bracket; after sampling, force is applied to the convex plug through the hydraulic cylinder, and therefore, a sample is pressed out through the upper opening of the sampling cylinder. Secondary pollution cannot be caused in the sampling process; the obtained sample has few pores and uniform and accurate components; the automatic-demoulding molten steel sampler disclosed by the invention is simple and reliable in structure and low in manufacture cost; and demoulding can be carried out conveniently through the hydraulic device.
Description
Technical field:
The invention belongs to technical field of ferrous metallurgy, be specifically related to a kind of automatic demoulding molten steel sampler and using method thereof.
Background technology:
In order to ensure steel product quality, sampling in Steel Refining process, is needed to carry out chemical element and gas composition analysis.The molten steel sampler generally used both at home and abroad at present mainly contains sonde-type and the large class of bucket-type two.Wherein the component such as metal-like diaphragm capsule of being generally put together by quartz ampoule, table tennis racket of sonde-type sampler formed, and adopt cylindric papery casing to live, sonde-type molten steel sampler disclosed in Chinese patent CN200620089061.0 and CN200720098163.3, when sampling, molten steel can flow into sampler from bottom to top.This sampling mode can cause pore in sample more usually, and the sample rate of getting into is on the low side.Disclosed in Chinese patent CN200620093973.5 and CN201220426356.8, sonde-type molten steel sampler is improved to side feed liquor, and due to MOLTEN STEEL FLOW sexual deviation, this improvement also fails thoroughly to solve the more problem of pore.In actual production, the sonde-type sampler rate of getting into is on the low side, and probe complex manufacturing technology, on the high side, but its easy demoulding of sample of taking out.The mode that bucket-type sampler adopts molten steel to flow into molten steel sampler from top to bottom samples, and in molten steel sampler, molten steel is filled closely knit, and the porosity is low.But in sample cooling procedure, shrinkage cavity is serious, organize not fine and close, and the sample demoulding is difficult.Top is generally adopted to increase thermofin for reducing shrinkage cavity, top surplus heat is made to supplement bottom dispersed heat, to reduce shrinkage cavity, disclosed in Chinese patent CN200520043896.8 and CN201020015828.1, bucket-type molten steel sampler adds a thermofin on top.Although the thermofin increased can reduce shrinkage cavity effect, easily cause the secondary pollution to molten steel, the accuracy that impact detects.
For the ease of the demoulding, sampler can adopt the structure of up big and down small conical internal cavity, and disclosed in Chinese patent CN200620057735.9, CN200820023055.4 and CN201120080580.1, bucket-type molten steel sampler all adopts this kind of structure.But shaped piece processing difficulties, processing cost is also higher.
Summary of the invention:
For solving prior art Problems existing, the present invention proposes one can prevent secondary pollution, obtains that sample pore is few, low cost of manufacture, uniform composition accurate, and the automatic demoulding molten steel sampler be convenient in demoulding and using method thereof.
For realizing above object, the present invention by the following technical solutions, a kind of automatic demoulding molten steel sampler, comprise sampler barrel and stripper, the bottom of described sampler barrel is provided with locating cover and convex plug, and convex plug is arranged in sampler barrel, and be positioned at the top of locating cover, described locating cover is provided with positioning through hole, and convex is provided with the locating convex block corresponding with described positioning through hole beyond the Great Wall, and locating cover is matched by positioning through hole and locating convex block with convex plug; The sidewall of sampler barrel is double-decker, is provided with exothermic mixture in the space between inside and outside wall; Described stripper comprises support, the top of support is provided with hydraulic cylinder, hydraulic cylinder is connected to hydraulic pump, the middle part of support and bottom are respectively arranged with movable chuck and demoulding base, described movable chuck is provided with the first through hole, its size is consistent with the external diameter of sampler barrel, and described demoulding base is provided with the second through hole, and its size is more than or equal to the internal diameter of sampler barrel.
Described exothermic mixture is the potpourri of aluminium powder and iron oxide, and the mass ratio of aluminium powder and iron oxide is 0.3 ~ 0.5.
The top of described sampler barrel is provided with extension rod, and extension rod is multistage, adopts and be threaded between adjacent two segment elongation bars.
The oiler of described hydraulic pump is connected to hydraulic reservoir by oil pipe, the oil-out of hydraulic pump is connected to hydraulic cylinder by oil pipe, oil pipe between the oil-out and hydraulic cylinder of hydraulic pump is provided with retaining valve, described hydraulic cylinder is connected to hydraulic reservoir by oil pipe, and the oil pipe between hydraulic cylinder and hydraulic reservoir is provided with hand valve.
Described stripper also comprises pallet, and described pallet is arranged on support, the below of demoulding base.
The using method of described automatic demoulding molten steel sampler, comprises the following steps:
Step one: place seals up aluminium foil at sampler barrel upper opening, and wrap up one deck refractory wass at the outer wall of sampler barrel;
Step 2: sampler barrel is stretched in molten steel and samples;
Step 3: sampler barrel is upside down on stripper, make the bottom of sampler barrel be arranged in the first through hole of movable chuck, its top contacts with the upper surface of demoulding base, and makes the upper opening of sampler barrel corresponding with the second through hole of demoulding base;
Step 4: primer fluid press pump, makes the piston of hydraulic cylinder move downward, and exerts pressure to convex plug, and then the sample promoted in sampler barrel comes off in sampler barrel.
Beneficial effect of the present invention: can not bring secondary pollution in sampling, obtain the few and uniform composition of sample pore accurate, the present invention is simple and reliable for structure, low cost of manufacture, carries out the demoulding more convenient by hydraulic means.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of sampler barrel of the present invention;
Fig. 2 is the locating cover of Fig. 1 and the structural representation of convex plug;
Fig. 3 is the structural representation after sampler barrel of the present invention coordinates with stripper;
Wherein: 1-sampler barrel, 2-locating cover, 3-convex plug, 4-exothermic mixture, 5-fire clay, 6-support, 7-movable chuck, 8-demoulding base, 9-hydraulic cylinder, 10-hydraulic pump, 11-piston, 12-pallet, 13-extension rod, 14-hand valve, 15-retaining valve, 16-spring, 17-aluminium foil, 18-hydraulic reservoir, 19-sample, 20-solder joint, 21-positioning through hole, 22-locating convex block.
Embodiment:
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further details, as shown in FIG. 1 to 3, a kind of automatic demoulding molten steel sampler, comprise sampler barrel 1 and stripper, the upper opening of described sampler barrel 1, bottom is provided with locating cover 2 and convex plug 3, convex plug 3 is arranged in sampler barrel 1, and be positioned at the top of locating cover 2, described locating cover 2 is provided with positioning through hole, convex plug 3 is provided with the locating convex block 22 corresponding with described positioning through hole 21, locating cover 2 is matched by positioning through hole 21 and locating convex block 22 with convex plug 3, the external diameter of convex plug 3 is identical with the internal diameter of sampler barrel 1 and be arranged in sampler barrel 1, the sidewall of sampler barrel 1 is double-decker, low carbon stainless steel is all adopted to make, inside and outside wall thickness is 3mm ~ 5mm, sampler barrel height 10cm ~ 20cm, the external diameter of its inwall is 3cm ~ 5cm, internal diameter 2cm ~ the 4cm larger than the external diameter of internal layer barrel of outer wall, is inside provided with the potpourri exothermic mixture 4 of aluminium powder and iron oxide, and the mass ratio of aluminium powder and iron oxide is 0.4, the upper end in the space between inside and outside wall is provided with fire clay 5, and exothermic mixture 4 adds before sampling operation, and the effect of fire clay 5 prevents exothermic mixture 4 from coming off.The temperature of reaction of exothermic mixture 4 is at about 1200C °, in sampling process, due to shorter with the steel contacts time, temperature of reaction can not be heated to, but the concurrent cast alumin(i)um thermal response of temperature of reaction can be reached in cooling procedure, thus heat release also supplements the heat in cooling procedure, and its reacted residue also can play insulation effect, thus effectively decreases the cooled shrinkage cavity of sample 19.
Described stripper comprises support 6, the top of support 6 is provided with hydraulic cylinder 8, hydraulic cylinder 8 by oil pipe to the oil-out of hydraulic pump 10, the oiler of hydraulic pump 10 is connected to hydraulic reservoir 18 by oil pipe, oil pipe between hydraulic pump 8 oil-out and hydraulic cylinder 9 is provided with retaining valve 15, hydraulic cylinder 9 is also connected with hand valve 14, hand valve 14 is connected directly to hydraulic reservoir 18, the middle part of support 6 and bottom are respectively arranged with movable chuck 7 and demoulding base 8, described movable chuck 7 is provided with the first through hole, its size is consistent with the external diameter of sampler barrel 1, to ensure that sampler barrel 1 can be fixed, described demoulding base 8 is provided with the second through hole, its size is greater than the internal diameter of sampler barrel 1, ensure when carrying out demoulding work, sample 19 can drop out smoothly.
The top of described sampler barrel is provided with extension rod 13, and extension rod 13 is multistage, adopts and be threaded between adjacent two segment elongation bars 13, can install the extension rod of appropriate length to prevent workman by high-temperature molten steel roasting wound during sampling.
Described stripper also comprises pallet 12, and described pallet 12 to be arranged on support 6, and the bottom of demoulding base 8, for catching the sample 19 come off in sampler barrel 1.
The using method step of the present embodiment is as follows:
Step one: 2 solder joints 20 of burn-oning between locating cover 2 and convex plug 3, comes off to prevent convex plug 3 in sampling process;
Step 2: seal up an aluminium foil 17, with the impurity of isolated molten steel surface at sampler barrel 1 upper opening place;
Step 3: by sampler barrel 1 outer wrapping one deck refractory wass, do not melted rapidly to protect sampler barrel 1;
Step 4: sampler barrel 1 is stretched into molten steel and samples, aluminium foil 17 can completely cut off the impurity of molten steel surface, after sampler barrel 1 all immerses molten steel, aluminium foil 17 can dissolve rapidly, molten steel can flow in sampler barrel 1, within 10 seconds, complete sampling, prevents too high temperature from damaging sampler barrel 1 and extension rod 13.
Step 5: cooled by the sampler barrel 1 after sampling, stops rubescent being advisable with it;
Step 6: sampler barrel 1 after cooling is inverted and is arranged on stripper, first movable chuck 7 is moved down, the bottom of sampler barrel 1 outer wall is made to be arranged in the first through hole of movable chuck 7, Qi Ding top contacts with the upper surface of demoulding base 8, and make the upper opening of sampler barrel 1 corresponding with the second through hole of demoulding base 8, then movable chuck 7 is moved up, until close to the outer rim of locating cover 2, then movable chuck 7 is fixed;
Step 7: primer fluid press pump 10, makes the piston 11 of hydraulic cylinder 9 move downward, and exerts pressure to convex plug 3, and then the sample 19 promoted in sampler barrel 1 comes off in sampler barrel 1.
Namely sample 19 after coming off can be sent to laboratory and analyze after supercooling.Be provided with exothermic mixture 4 in sidewall due to sampler barrel 1, its heat can ensure the stable cooling of sample 19, and thus to produce pore few for sample 19, and its composition is comparatively even.After the demoulding, close hydraulic pump 10, and opened by hand valve 14, the spring 16 in hydraulic cylinder 9 promotes piston 11 and sets back, and the hydraulic oil in hydraulic cylinder 9 can manually flow back in hydraulic reservoir 18 by valve 14.Then sampler barrel 1 is taken off, take out fire clay 5 and the exothermic mixture 4 by mistake, and load new exothermic mixture 4, carry out encapsulation in order to lower sub-sampling with fire clay 5.
Claims (6)
1. an automatic demoulding molten steel sampler, it is characterized in that: comprise sampler barrel and stripper, the bottom of described sampler barrel is provided with locating cover and convex plug, convex plug is arranged in sampler barrel, and be positioned at the top of locating cover, described locating cover is provided with positioning through hole, and convex is provided with the locating convex block corresponding with described positioning through hole beyond the Great Wall, and locating cover is matched by positioning through hole and locating convex block with convex plug; The sidewall of sampler barrel is double-decker, is provided with exothermic mixture in the space between inside and outside wall; Described stripper comprises support, the top of support is provided with hydraulic cylinder, hydraulic cylinder is connected to hydraulic pump, the middle part of support and bottom are respectively arranged with movable chuck and demoulding base, described movable chuck is provided with the first through hole, its size is consistent with the external diameter of sampler barrel, and described demoulding base is provided with the second through hole, and its size is more than or equal to the internal diameter of sampler barrel.
2. automatic demoulding molten steel sampler according to claim 1, is characterized in that: described exothermic mixture is the potpourri of aluminium powder and iron oxide, and the mass ratio of aluminium powder and iron oxide is 0.3 ~ 0.5.
3. automatic demoulding molten steel sampler according to claim 1, is characterized in that: the top of described sampler barrel is provided with extension rod, extension rod is multistage, adopts and be threaded between adjacent two segment elongation bars.
4. automatic demoulding molten steel sampler according to claim 1, it is characterized in that: the oiler of described hydraulic pump is connected to hydraulic reservoir by oil pipe, the oil-out of hydraulic pump is connected to hydraulic cylinder by oil pipe, oil pipe between the oil-out and hydraulic cylinder of hydraulic pump is provided with retaining valve, described hydraulic cylinder is connected to hydraulic reservoir by oil pipe, and the oil pipe between hydraulic cylinder and hydraulic reservoir is provided with hand valve.
5. automatic demoulding molten steel sampler according to claim 1, is characterized in that: described stripper also comprises pallet, described pallet is arranged on support, the below of demoulding base.
6. the using method of automatic demoulding molten steel sampler according to claim 1, is characterized in that: comprise the following steps:
Step one: place seals up aluminium foil at sampler barrel upper opening, and wrap up one deck refractory wass at the outer wall of sampler barrel;
Step 2: sampler barrel is stretched in molten steel and samples;
Step 3: sampler barrel is upside down on stripper, make the bottom of sampler barrel be arranged in the first through hole of movable chuck, its top contacts with the upper surface of demoulding base, and makes the upper opening of sampler barrel corresponding with the second through hole of demoulding base;
Step 4: primer fluid press pump, makes the piston of hydraulic cylinder move downward, and exerts pressure to convex plug, and then the sample promoted in sampler barrel comes off in sampler barrel.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697814A (en) * | 2015-03-31 | 2015-06-10 | 北京首钢股份有限公司 | Pail sample sampling method |
| CN105784442A (en) * | 2016-03-17 | 2016-07-20 | 哈尔滨工程大学 | Combined die for concrete sample and manual demoulding device |
| CN113155531A (en) * | 2021-03-24 | 2021-07-23 | 上海一郎合金材料有限公司 | Multifunctional alloy material sampling device and use method |
| WO2022174819A1 (en) * | 2021-02-20 | 2022-08-25 | 宝山钢铁股份有限公司 | Sampling probe and automatic separation device thereof, and use method |
| CN117405450A (en) * | 2023-10-18 | 2024-01-16 | 苏州苏铸智能装备有限公司 | Full-automatic demoulding sampling device of blast furnace molten steel |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01262103A (en) * | 1988-04-13 | 1989-10-19 | Eiji Iwano | Method and device for mold-releasing, cleaning and oil-applying formwork for concrete specimen |
| JPH1096722A (en) * | 1996-09-24 | 1998-04-14 | Nkk Corp | Sampling device for analytical specimen from molten metal and sampling method |
| CN2653480Y (en) * | 2003-11-07 | 2004-11-03 | 王喜云 | Molten steel sampler |
| CN200939499Y (en) * | 2006-08-07 | 2007-08-29 | 济南圣泉集团股份有限公司 | Novel heating and warming riser sleeve |
| CN101863075A (en) * | 2010-05-21 | 2010-10-20 | 中国地质大学（武汉） | Sample preparing and demoulding integrated instrument |
| CN201740670U (en) * | 2010-06-17 | 2011-02-09 | 宝山钢铁股份有限公司 | Molten steel sampling device |
| CN202393214U (en) * | 2011-12-20 | 2012-08-22 | 北京有色金属研究总院 | Detachable crucible special for smelting lithium boron alloy |
| CN202770687U (en) * | 2012-09-13 | 2013-03-06 | 黄廷国 | Test piece ejector |
| CN103308364A (en) * | 2013-06-25 | 2013-09-18 | 青岛理工大学 | Manual demoulding device |
| CN204286857U (en) * | 2014-11-13 | 2015-04-22 | 东北大学 | A kind of automatic demoulding molten steel sampler |
-
2014
- 2014-11-13 CN CN201410639765.XA patent/CN104359710B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01262103A (en) * | 1988-04-13 | 1989-10-19 | Eiji Iwano | Method and device for mold-releasing, cleaning and oil-applying formwork for concrete specimen |
| JPH1096722A (en) * | 1996-09-24 | 1998-04-14 | Nkk Corp | Sampling device for analytical specimen from molten metal and sampling method |
| CN2653480Y (en) * | 2003-11-07 | 2004-11-03 | 王喜云 | Molten steel sampler |
| CN200939499Y (en) * | 2006-08-07 | 2007-08-29 | 济南圣泉集团股份有限公司 | Novel heating and warming riser sleeve |
| CN101863075A (en) * | 2010-05-21 | 2010-10-20 | 中国地质大学（武汉） | Sample preparing and demoulding integrated instrument |
| CN201740670U (en) * | 2010-06-17 | 2011-02-09 | 宝山钢铁股份有限公司 | Molten steel sampling device |
| CN202393214U (en) * | 2011-12-20 | 2012-08-22 | 北京有色金属研究总院 | Detachable crucible special for smelting lithium boron alloy |
| CN202770687U (en) * | 2012-09-13 | 2013-03-06 | 黄廷国 | Test piece ejector |
| CN103308364A (en) * | 2013-06-25 | 2013-09-18 | 青岛理工大学 | Manual demoulding device |
| CN204286857U (en) * | 2014-11-13 | 2015-04-22 | 东北大学 | A kind of automatic demoulding molten steel sampler |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697814A (en) * | 2015-03-31 | 2015-06-10 | 北京首钢股份有限公司 | Pail sample sampling method |
| CN104697814B (en) * | 2015-03-31 | 2018-01-12 | 北京首钢股份有限公司 | A kind of pail sample sampling method |
| CN105784442A (en) * | 2016-03-17 | 2016-07-20 | 哈尔滨工程大学 | Combined die for concrete sample and manual demoulding device |
| CN105784442B (en) * | 2016-03-17 | 2018-08-31 | 哈尔滨工程大学 | Concrete sample assembling die and hand-stripping device |
| WO2022174819A1 (en) * | 2021-02-20 | 2022-08-25 | 宝山钢铁股份有限公司 | Sampling probe and automatic separation device thereof, and use method |
| CN113155531A (en) * | 2021-03-24 | 2021-07-23 | 上海一郎合金材料有限公司 | Multifunctional alloy material sampling device and use method |
| CN117405450A (en) * | 2023-10-18 | 2024-01-16 | 苏州苏铸智能装备有限公司 | Full-automatic demoulding sampling device of blast furnace molten steel |
| CN117405450B (en) * | 2023-10-18 | 2024-05-14 | 苏州苏铸智能装备有限公司 | Full-automatic demoulding sampling device of blast furnace molten steel |
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