CN102382950A - Conductive wheel electric heating device for cold-rolled ribbed steel bar production line - Google Patents
Conductive wheel electric heating device for cold-rolled ribbed steel bar production line Download PDFInfo
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- CN102382950A CN102382950A CN2011103508765A CN201110350876A CN102382950A CN 102382950 A CN102382950 A CN 102382950A CN 2011103508765 A CN2011103508765 A CN 2011103508765A CN 201110350876 A CN201110350876 A CN 201110350876A CN 102382950 A CN102382950 A CN 102382950A
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- conductive casters
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- conductive wheel
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Abstract
The invention discloses a conductive wheel electric heating device for a cold-rolled ribbed steel bar production line. The conductive wheel electric heating device comprises a frame, a positive conductive wheel and a negative conductive wheel; the positive conductive wheel and the negative conductive wheel are mutually spaced and hinged on the frame; the positive conductive wheel and the negative conductive wheel are respectively connected with an anode and a cathode of a power supply; and a steel bar goes round the top/bottom of the positive conductive wheel under the traction of a power device and leaves the bottom/top of the negative conductive wheel in a contact manner, and the steel bar is heated by electricity during going round the positive conductive wheel and leaving the negative conductive wheel in the contact manner. The device has the advantages that: the steel bar is heated by adopting resistance heat, so that the device saves the space, has high efficiency, replaces a high-frequency induction heating furnace of the ribbed steel bar production line in the prior art and saves 30 percent of energy compared with the prior art; the device is simple in structure and low in cost; the manufacturing cost of the device is about one third of the high-frequency furnace; and when the device is used with a cold rolling mill, the advantages of a heating tempering technology can be exerted.
Description
Technical field
What the present invention relates to is the Ribbed Bar production line, particularly be the conductive casters electric heater unit of cold rolled reinforcing steel bar with ribs production line.
Background technology
From the twentieth century later stage, domestic cold rolled reinforcing steel bar with ribs develops rapidly becomes the novel building rolling shapes because cold rolled reinforcing steel bar with ribs have intensity height, plasticity good, be easy to processing, also have with the cement bond stress by force, can practice thrift advantages such as great deal of steel.Though cold rolled reinforcing bar intensity is higher, exist unit elongation to hang down defective, so the use of cold rolled reinforcing bar is restricted.For overcoming above-mentioned defective, prior art cold rolled reinforcing steel bar with ribs production line is provided with dielectric heating oven, and cold rolled reinforcing bar can improve the over-all properties of cold rolled reinforcing steel bar with ribs after dielectric heating oven temper operation.
Fig. 1 is the syndeton synoptic diagram of prior art cold rolled reinforcing steel bar with ribs production line.
As shown in Figure 1, prior art cold rolled reinforcing steel bar with ribs production line is cooperated the reinforcing bar unwrapping wire part of constitutive material by horizontal pay off rack 2a and reason wire frame 2b; Scale breaker 3 is used to away the oxidation firecoat and the corrosion of rebar surface; Tube reducing milling train 4 is accomplished primary reducing and rolling to the reinforcing bar after the de-scaling; Moulding milling train 5 is used for the rolling again pressure rib of a reinforcing bar and is shaped to Ribbed Bar; Straightening mechanism 6 is used for the Ribbed Bar aligning that comes out rolling; Counting mechanism 7 is used for scale and measures the length of the reinforcing bar that milling train comes out; Anti-play device 9 is used for preventing the play of reinforcing bar; Cutting mechanism 10 is used for cutting off the Ribbed Bar that rolls out; Material collecting device 11 is used for collecting rolling good finished product Ribbed Bar.Dielectric heating oven 8a among Fig. 1 is arranged between moulding milling train 5 and the cutting mechanism 10, adopts the method for high frequency furnace induction heating reinforcing bar to be carried out tempering heat treatment to the reinforcing bar heating.
There is following defective in above-mentioned prior art cold rolled reinforcing steel bar with ribs production line: though the cold rolled reinforcing steel bar with ribs after the tempered processing has improved the over-all properties of reinforcing bar; But still the manufacturing cost of depositing dielectric heating oven is high; Current consumption is high; It is big to take up room, and the defective that equipment cost is high has restricted using and popularizing of this technology.
When prior art cold rolled reinforcing steel bar with ribs production line adopts dielectric heating oven heating reinforcing bar; Need a cover high-frequency induction equipment, manufacturing cost is very high, is that the reinforcing bar roll speed of 10mm is when being 3m/s like diameter; Heating temperature is to 600 deg.c, and high frequency furnace needs the power of 600KW at least; The induction heating length of tube of high frequency furnace is greater than ten meters, and equipment occupation space is very big.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned technology; Provide a kind of reinforcing bar contact through one group of charged opposite polarity conductive casters contact conducting heating; Reinforcing bar is heat-treated, and it is low to have a cost, and it is little to take up room; Current consumption is little, improves the conductive casters electric heater unit of the cold rolled reinforcing steel bar with ribs production line of reinforcing bar over-all properties.
The technical scheme that solves the problems of the technologies described above is: a kind of conductive casters electric heater unit of cold rolled reinforcing steel bar with ribs production line, and said conductive casters electric heater unit comprises: frame, anodal conductive casters and negative pole conductive casters that structure is identical; Said anodal conductive casters and negative pole conductive casters are provided with and hinged being supported on the frame of while each other at interval; Said anodal conductive casters is connected positive source and power cathode respectively with the negative pole conductive casters; Reinforcing bar is walked around to contact from the bottom/top of negative pole conductive casters from the top/bottom contact of anodal conductive casters down in PWR PLT tractions again and is laid out, and reinforcing bar is walked around in anodal conductive casters and the negative pole conductive casters operational process in contact and is energized heating.
The invention has the beneficial effects as follows: the present invention overcomes the defective of prior art, and the present invention adopts the power that the conductive casters electric heater unit only need about 400kw, than the energy-conservation raising 30% of prior art; The present invention takes up room little, and the length between two conductive casterses is about 0.5 meter, and length is about 1/20th of dielectric heating oven; The present invention has simple in structure, and manufacturing cost and use cost is low; Heating unit cost of the present invention is about 1/3rd of high frequency furnace, with the supporting real advantage of having given play to the heating tempering process of ability of using of cold-rolling mill.
The present invention substitutes the high-frequency induction furnace of prior art Ribbed Bar production line, is used on the cold rolled reinforcing steel bar with ribs production line the online heating of reinforcing bar, heats reinforcing bar owing to adopt electric current directly to flow through the reinforcing bar heat that has a resistance, and saves the space; Owing to adopted the energising direct heating, efficient is high.
Description of drawings
Fig. 1 is the syndeton synoptic diagram of prior art cold rolled reinforcing steel bar with ribs production line;
Fig. 2 is the syndeton synoptic diagram of cold rolled reinforcing steel bar with ribs production line of the present invention;
Fig. 3 is a conductive casters heating unit enlarged diagram among Fig. 2;
Fig. 4 is the B-B sectional view of Fig. 3;
Fig. 5 is the left side view of Fig. 3;
Fig. 6 is the A-A sectional view of Fig. 3.
" sequence number explanation in the accompanying drawing "
1: reinforcing bar; 2a: horizontal pay off rack; 2b: reason wire frame; 3: the dephosphorization machine; 4: the tube reducing milling train; 5: the moulding milling train; 6: straightening mechanism; 7: counting mechanism; 8a: dielectric heating oven; 8b: conductive casters electric heater unit; 9: anti-play device; 10: cutting mechanism; 11: material collecting device; 12: anodal conductive casters; 13: the negative pole conductive casters; 14: positive pole axis; 15: the negative pole axle; 16: push bolt; 17: positive wire; 18: cathode conductor; 19: bearing; 20: spring; 21: frame; 21a: frame adjustment hole; 22: the adjustment bolt; 23: latch.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further detailed.
Fig. 1 is the syndeton synoptic diagram of prior art cold rolled reinforcing steel bar with ribs production line; Fig. 2 is the syndeton synoptic diagram of cold rolled reinforcing steel bar with ribs production line of the present invention; Fig. 3 is a conductive casters heating unit enlarged diagram among Fig. 2; Fig. 4 is the B-B sectional view of Fig. 3; Fig. 5 is the left side view of Fig. 3; Fig. 6 is the A-A sectional view of Fig. 3.
As shown in Figure 2, cold rolled reinforcing steel bar with ribs production line of the present invention comprises: form reinforcing bar unwrapping wire part, scale breaker 3, tube reducing milling train 4, moulding milling train 5, straightening mechanism 6, counting mechanism 7, conductive casters electric heater unit 8b, cutting mechanism 10, material collecting device 11 by horizontal pay off rack 2a and reason wire frame 2b; Said conductive casters electric heater unit 8b is arranged between tube reducing milling train 4 and the moulding milling train 5, adopts conductive casters energising heating that reinforcing bar 1 is heat-treated.
Need to prove that the parts that cold rolled reinforcing steel bar with ribs production line of the present invention is identical with the prior art structure use same sequence number.
The present invention provides a kind of conductive casters electric heater unit 8b of cold rolled reinforcing steel bar with ribs production line, and said conductive casters electric heater unit 8b comprises: frame 21, anodal conductive casters 12 and negative pole conductive casters 13 that structure is identical; Said anodal conductive casters 12 is provided with also hinged being supported on the frame 21 simultaneously each other at interval with negative pole conductive casters 13; Said anodal conductive casters 12 is connected positive source and power cathode respectively with negative pole conductive casters 13; Reinforcing bar 1 is walked around from the bottom/top contact of negative pole conductive casters 13 from the top/bottom contact of anodal conductive casters 12 down in PWR PLT tractions again and is laid out, and reinforcing bar 1 is walked around in anodal conductive casters 12 and negative pole conductive casters 13 operational processs in contact and is energized heating.
On said anodal conductive casters 12 and negative pole conductive casters 13, the identical adjustment of structure arrangement for adjusting height in the opposite direction is housed respectively, said arrangement for adjusting height comprises: adjustment bolt 22, positive pole axis 14 and negative pole axle 15; Said adjustment bolt 22 equipped and run through the screw of frame 21 after its end get in the frame adjustment hole 21a of frame 21; One end of said positive pole axis 14 and negative pole axle 15 inserts interior its end of frame adjustment hole 21a respectively and with fastening piece and latch 23 its cantilevered is fixed on the frame 21, hinged respectively said anodal conductive casters 12 of the other end of positive pole axis 14 and negative pole axle 15 and negative pole conductive casters 13; The end of adjustment bolt 22 withstands on the top/bottom of positive pole axis 14 bottom/top and negative pole axle 15 respectively.
The structure that is connected positive source and power cathode on said anodal conductive casters 12 and the negative pole conductive casters 13 respectively comprises: positive wire 17, cathode conductor 18, push bolt 16 and spring 20; Said positive wire 17 and cathode conductor 18 in the form of a ring, an one of which side is close to respectively on the side of anodal conductive casters 12 and negative pole conductive casters 13, a plurality of push bolts 16 are pressed on another side of positive wire 17 and cathode conductor 18 with spring 20; Said a plurality of push bolt 16 is fitted in respectively in the threaded hole that connects on positive pole axis 14 and the negative pole axle 15, said positive pole axis 14 and anodal conductive casters 12 of the hinged support of negative pole axle 15 difference and negative pole conductive casters 13.
More particularly; Said anodal conductive casters 12 is hingedly mounted on the positive pole axis 14 through bearing 19; The positive wire 17 compacted bolts 16 that have the straight polarity electricity compress with anodal conductive casters 12 through spring 20 and contact, and have the positive wire 17 and anodal conductive casters 12 conductings of straight polarity electricity; Said negative pole conductive casters 13 is hingedly mounted on the negative pole axle 15 through bearing 19; The cathode conductor 18 compacted bolts 16 that have the negative polarity electricity compress with negative pole conductive casters 13 through spring 20 and contact, and have the cathode conductor 18 and 13 conductings of negative pole conductive casters of negative polarity electricity.
Extremely shown in Figure 6 like Fig. 3; Reinforcing bar 1 is walked around from the top contact of anodal conductive casters 12; The positive pole axis 14 that is installed on the frame 21 is withstood on positive pole axis 14 bottoms by adjustment bolt 22 ends; Positive pole axis 14 and the anodal conductive casters 12 that is contained on the positive pole axis 14 are upwards held up, make positive pole axis 14 drive anodal conductive casters 12 and move up and contact, be convenient to current delivery with anodal conductive casters 12 to reinforcing bar 1 with reinforcing bar 1.If reinforcing bar 1 is walked around from anodal conductive casters 12 bottoms contacts, adjustment bolt 22 ends withstand on the top of positive pole axis 14, and it is in the opposite direction that adjustment bolt 22 adjustment directions and above-mentioned reinforcing bar 1 contact the adjustment of walking around from the top of anodal conductive casters 12.
Extremely shown in Figure 6 like Fig. 3; Reinforcing bar 1 is walked around from the bottom contact of negative pole conductive casters 13; Adjustment bolt 22 ends withstand on negative pole axle 15 tops; Negative pole axle 15 and the negative pole conductive casters 13 that is contained on the negative pole axle 15 are depressed downwards, made negative pole axle 15 drive negative pole conductive casterses 13 and move down with reinforcing bar 1 and contact, be convenient to current delivery with negative pole conductive casters 13 to reinforcing bar 1.If reinforcing bar 1 from the top of negative pole conductive casters 13 contact walk around, adjustment bolt 22 ends withstand on the bottom of negative pole axle 15, it is in the opposite direction that adjustment bolt 22 adjustment directions and above-mentioned reinforcing bar 1 contact the adjustment of walking around from the bottom of negative pole conductive casters 13.
The positive pole axis 14 that is installed on the frame 21 makes anodal conductive casters 12 contact with reinforcing bar 1 simultaneously with negative pole conductive casters 13 under 22 adjustment of adjustment bolt with negative pole axle 15; Reinforcing bar 1 will form current return with negative pole conductive casters 13 conductings of anodal conductive casters 12 of anodal and band negative pole; On reinforcing bar 1, can flow through electric current and have a resistance the heat completion, can reach the technique effect of temper reinforcing bar 1 heating.So just carry out heat treated to the reinforcing bar behind the tube reducing and get into moulding milling train 5 fast and accomplish the rolling of Ribbed Bar, obtain the Ribbed Bar of good combination property, then accomplish the operations such as aligning, shearing, rewinding of postorder.
Claims (3)
1. the conductive casters electric heater unit of a cold rolled reinforcing steel bar with ribs production line is characterized in that, said conductive casters electric heater unit comprises: frame (21), anodal conductive casters (12) and negative pole conductive casters (13) that structure is identical; Said anodal conductive casters (12) and negative pole conductive casters (13) are provided with and hinged being supported on the frame (21) of while each other at interval; Said anodal conductive casters (12) is connected positive source and power cathode respectively with negative pole conductive casters (13); Reinforcing bar (1) is walked around to contact from the bottom/top of negative pole conductive casters (13) from the top/bottom contact of anodal conductive casters (12) down in PWR PLT tractions again and is laid out, and reinforcing bar (1) is walked around in anodal conductive casters (12) and negative pole conductive casters (13) operational process in contact and is energized heating.
2. according to the conductive casters electric heater unit of the cold rolled reinforcing steel bar with ribs production line described in the claim 1; It is characterized in that; On said anodal conductive casters (12) and negative pole conductive casters (13), the identical adjustment of structure arrangement for adjusting height in the opposite direction is housed respectively, said arrangement for adjusting height comprises: adjustment bolt (22), positive pole axis (14) and negative pole axle (15); Said adjustment bolt (22) equipped and run through the screw of frame (21) after its end get in the frame adjustment hole (21a) of frame (21); One end of said positive pole axis (14) and negative pole axle (15) inserts interior its end of frame adjustment hole (21a) respectively and with fastening piece and latch (23) its cantilevered is fixed on the frame (21), and the other end of positive pole axis (14) and negative pole axle (15) is hinged said anodal conductive casters (12) and negative pole conductive casters (13) respectively; The end of adjustment bolt (22) withstands on the top/bottom of positive pole axis (14) bottom/top and negative pole axle (15) respectively.
3.. conductive casters electric heater unit according to the cold rolled reinforcing steel bar with ribs production line described in the claim 1; It is characterized in that the structure that is connected positive source and power cathode on said anodal conductive casters (12) and the negative pole conductive casters (13) respectively comprises: positive wire (17), cathode conductor (18), push bolt (16) and spring (20); Said positive wire (17) and cathode conductor (18) are in the form of a ring; An one of which side is close to respectively on the side of anodal conductive casters (12) and negative pole conductive casters (13), and a plurality of push bolts (16) and spring (20) are pressed on another side of positive wire (17) and cathode conductor (18); Said a plurality of push bolt (16) is fitted in positive pole axis (14) respectively and negative pole axle (15) is gone up in the threaded hole that connects, and said positive pole axis (14) and negative pole axle (15) be anodal conductive casters of hinged support (12) and negative pole conductive casters (13) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110350876 CN102382950B (en) | 2011-11-08 | 2011-11-08 | Conductive wheel electric heating device for cold-rolled ribbed steel bar production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110350876 CN102382950B (en) | 2011-11-08 | 2011-11-08 | Conductive wheel electric heating device for cold-rolled ribbed steel bar production line |
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| Publication Number | Publication Date |
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| CN102382950A true CN102382950A (en) | 2012-03-21 |
| CN102382950B CN102382950B (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110350876 Active CN102382950B (en) | 2011-11-08 | 2011-11-08 | Conductive wheel electric heating device for cold-rolled ribbed steel bar production line |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382048A (en) * | 2015-12-16 | 2016-03-09 | 重庆麦拓科技有限公司 | Cold rolled reinforcing bar production line |
| CN112090957A (en) * | 2020-09-03 | 2020-12-18 | 马鞍山延隆新材料科技有限公司 | Preparation method of high-ductility cold-rolled ribbed steel bar |
| CN112658046A (en) * | 2020-12-08 | 2021-04-16 | 安阳复星合力新材料股份有限公司 | Energy-saving production method of high-ductility cold-rolled steel bar |
| CN112742863A (en) * | 2020-12-04 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Production method of cold-rolled steel bar |
| CN112742864A (en) * | 2020-12-04 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Production process of cold-rolled steel bar |
| CN112742865A (en) * | 2020-12-08 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Energy-saving production process of cold-rolled steel bar |
| CN113680933A (en) * | 2021-08-27 | 2021-11-23 | 中国兵器工业第五九研究所 | Forming method of thin-wall magnesium alloy ring piece |
| CN114774668A (en) * | 2022-04-19 | 2022-07-22 | 河南省鼎鼎实业有限公司 | Ribbed steel bar short circuit heat treatment equipment and heating power supply thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976547A (en) * | 2006-12-12 | 2007-06-06 | 桂林金格电工电子材料科技有限公司 | Silver-base alloy strip material conductive heating equipment |
| CN201265027Y (en) * | 2008-09-18 | 2009-07-01 | 鞍钢股份有限公司 | Direct switch-on heating annealing apparatus of hot rolled plate |
| CN202322914U (en) * | 2011-11-08 | 2012-07-11 | 建科机械（天津）股份有限公司 | Electric heating mechanism of conductive wheels of cold-rolled ribbed steel bar production line |
-
2011
- 2011-11-08 CN CN 201110350876 patent/CN102382950B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976547A (en) * | 2006-12-12 | 2007-06-06 | 桂林金格电工电子材料科技有限公司 | Silver-base alloy strip material conductive heating equipment |
| CN201265027Y (en) * | 2008-09-18 | 2009-07-01 | 鞍钢股份有限公司 | Direct switch-on heating annealing apparatus of hot rolled plate |
| CN202322914U (en) * | 2011-11-08 | 2012-07-11 | 建科机械（天津）股份有限公司 | Electric heating mechanism of conductive wheels of cold-rolled ribbed steel bar production line |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382048A (en) * | 2015-12-16 | 2016-03-09 | 重庆麦拓科技有限公司 | Cold rolled reinforcing bar production line |
| CN112090957A (en) * | 2020-09-03 | 2020-12-18 | 马鞍山延隆新材料科技有限公司 | Preparation method of high-ductility cold-rolled ribbed steel bar |
| CN112742863A (en) * | 2020-12-04 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Production method of cold-rolled steel bar |
| CN112742864A (en) * | 2020-12-04 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Production process of cold-rolled steel bar |
| CN112658046A (en) * | 2020-12-08 | 2021-04-16 | 安阳复星合力新材料股份有限公司 | Energy-saving production method of high-ductility cold-rolled steel bar |
| CN112742865A (en) * | 2020-12-08 | 2021-05-04 | 安阳复星合力新材料股份有限公司 | Energy-saving production process of cold-rolled steel bar |
| CN113680933A (en) * | 2021-08-27 | 2021-11-23 | 中国兵器工业第五九研究所 | Forming method of thin-wall magnesium alloy ring piece |
| CN114774668A (en) * | 2022-04-19 | 2022-07-22 | 河南省鼎鼎实业有限公司 | Ribbed steel bar short circuit heat treatment equipment and heating power supply thereof |
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| Publication number | Publication date |
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| CN102382950B (en) | 2013-07-31 |
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