CN103252366A - Cooling spray nozzle and through-water cooling device - Google Patents
Cooling spray nozzle and through-water cooling device Download PDFInfo
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- CN103252366A CN103252366A CN2013101646505A CN201310164650A CN103252366A CN 103252366 A CN103252366 A CN 103252366A CN 2013101646505 A CN2013101646505 A CN 2013101646505A CN 201310164650 A CN201310164650 A CN 201310164650A CN 103252366 A CN103252366 A CN 103252366A
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Abstract
The invention provides a cooling spray nozzle and a through-water cooling device. The cooling spray nozzle comprises a spray nozzle body and a spray nozzle inner cavity, the spray nozzle inner cavity is formed by the spray nozzle body in an enclosure mode, and a rolled piece can penetrate through the spray nozzle inner cavity. The spray nozzle body comprises a circular-seam-shaped spray channel and an annular inner cavity, the circular-seam-shaped spray channel is arranged in the circumferential direction of the spray nozzle body, and the annular inner cavity is communicated with the spray channel to supply stable cooling media to the spray channel. The spray channel comprises a spout communicated with the spray nozzle inner cavity, and a spray angle which is an acute angle is formed between the direction of the cooling media sprayed by the spout and the advancing direction of the rolled piece, or between the direction of the cooling media sprayed by the spout and the direction opposite to the advancing direction of the rolled piece. The through-water cooling device comprises a water cooling guide pipe, a forward-direction water spray nozzle, a backward-direction water spray nozzle and a backward-direction blowing spray nozzle, the forward-direction water spray nozzle is arranged at the inlet end of the water cooling guide pipe, the backward-direction water spray nozzle and the backward-direction blowing spray nozzle are arranged at the outlet end of the water cooling guide pipe, and cooling spray nozzles are adopted for the forward-direction water spray nozzle, the backward-direction water spray nozzle and the backward-direction blowing spray nozzle. The cooling spray nozzle can reduce the temperature of the surface of a through-water bar uniformly, reduces surface oxidation and marking-out, and is good in water sealing effect.
Description
Technical field
The present invention relates to technical field of steel rolling, more particularly, relate to the nozzle that a kind of rolled piece is worn water-cooling apparatus and adopted.
Background technology
But wear water-cooled be called roll the back Heat Treatment, wore water cooling after phase early 1980s, bar rolled and begun to use in China.The purpose of this technology is in order to improve the bar structural state, and the refine austenite tissue stops or postpones carbide and separates out too early in cooling procedure, and its disperse in ferrite is separated out, and improves intensity.Reduce the size of pearlite colony simultaneously, the refine pearlite sheet interlayer spacing improves the comprehensive mechanical property of bar.The temperature control of bar in cooling procedure is the key factor of the final tissue of direct influence of rolled product, in the production of reality, at certain product, must reasonably determine the technological parameter of cooling procedure, to obtain required tissue.
At present, high temperature rod, wire rod cooling system commonly used is that nozzle and cooling tube (or claiming the water-cooled conduit) are set in the water-cooled case, and cooling water is sprayed by nozzle, and cooling water is collected by the water-cooled case, and discharges by the discharge outlet of lower end.The weak point of existing excellent wire rod water cooling plant is: when red-hot excellent wire rod (red steel) surface contacts with cooling water, because film boiling causes the rolled piece surface to form steam blanket, hinder the heat exchange between rolled piece and the cooling water, cooling effectiveness is reduced.In addition, the pressure of water cooling plant cooling water in cooling procedure and flow are two principal elements that influence the rolled piece cooling effect, and the nozzle arrangements in the water cooling plant directly influences the mode of jet of cooling water and the flow of cooling water, is the key position in the excellent wire rod water cooling plant.Available technology adopting arranges a plurality of poroid nozzles along circumference wearing the water intersegmental part, because the cooling water of a plurality of nozzle ejections has pressure, red steel is worn water at a high speed and is out-of-date, bear the bigger water resistance of wearing, not only reduced mill speed, and be easy to generate heap steel accident, in addition, because poroid nozzle is the hole mode of jet, also has problems such as inhomogeneous, the easy surface oxidation of rolled piece surface cool and line.
Summary of the invention
At the deficiencies in the prior art, one of purpose of the present invention is to solve the one or more problems that exist in the above-mentioned prior art.For example, one of purpose of the present invention is to provide a kind of and can evenly cools off the cooling jet of rolled piece comprehensively and wear water-cooling apparatus.
To achieve these goals, an aspect of of the present present invention provides a kind of cooling jet.Described cooling jet comprises nozzle body and the nozzle chamber that supplies rolled piece to pass that is surrounded by nozzle body, wherein, described nozzle body comprises along the injection channel of its circumferential weld shape that circumferentially arranges, and is communicated with stably feed the ring-type inner chamber of cooling medium to described injection channel with described injection channel; Described injection channel comprises the ejiction opening that is communicated with described nozzle chamber, and the cooling medium of described ejiction opening ejection and the opposite direction of rolled piece direction of advance or rolled piece direction of advance form the jet angle that is acute angle.
According to an embodiment of cooling jet of the present invention, described nozzle body comprises two sub-nozzle bodies, and described two sub-nozzle bodies are installed the back and cooperated the injection channel that forms described circumferential weld shape.
According to an embodiment of cooling jet of the present invention, described ring-type inner chamber is along circumferentially being evenly distributed with the but aperture that passes through of medium of a plurality of coolings, and described aperture has the aperture that feeds enough flow cooling mediums to described injection channel.
According to an embodiment of cooling jet of the present invention, the injection channel of described circumferential weld shape is along leveling off to the direction of axis line convergence of nozzle body, and the opening degree of the ejiction opening of described injection channel is 1.5～2.0mm.
According to an embodiment of cooling jet of the present invention, the number of degrees of described jet angle can be preferably 20～45 °.
Another aspect of the present invention provides a kind of water-cooling apparatus of wearing.This is worn water-cooling apparatus and comprises the water-cooled conduit, be arranged on the forward spray nozzle of water-cooled duct entry end, and the reverse spray nozzle and the reverse purge nozzle that are arranged on water-cooled conduit outlet end, described forward spray nozzle, oppositely spray nozzle and the oppositely cooling jet of purge nozzle employing said structure, and, the water (flow) direction of described forward spray nozzle ejection and rolled piece direction of advance are in the same way and form first jet angle, the water (flow) direction of described reverse spray nozzle ejection is reverse and form second jet angle with the rolled piece direction of advance, and it is reverse and form the 3rd jet angle that airflow direction that nozzle sprays and rolled piece direction of advance are swept in described reverse spray.
According to an embodiment who wears water-cooling apparatus of the present invention, described second jet angle and/or the 3rd jet angle are less than first jet angle.
According to an embodiment who wears water-cooling apparatus of the present invention, the number of degrees of described first jet angle can be preferably 36～45 °, and the number of degrees of described second jet angle can be preferably 20～35 °, and the number of degrees of described the 3rd jet angle can be preferably 20～35 °.
According to an embodiment who wears water-cooling apparatus of the present invention, the opening degree of the injection channel ejiction opening of described forward spray nozzle is 1.8～2mm, the opening degree of the injection channel ejiction opening of described reverse spray nozzle is 1.8～2mm, and the opening degree of the injection channel ejiction opening of described reverse purge nozzle is 1.5～1.8mm.
According to an embodiment who wears water-cooling apparatus of the present invention, the described water-cooling apparatus of wearing also comprises for the support deflector roll that supports described water-cooled conduit.
Compared with prior art, beneficial effect of the present invention comprises: cooling jet sprays to the rolled piece surface with the mode of jet of ring-type with cooling medium, makes the temperature of wearing water bar surface obtain uniform reduction, reduces surface oxidation and line.Wear in the water device in water-cooled, jet direction and the rolled piece of cooling jet are angled, have increased film-cooled heat, have destroyed the steam blanket on rolled piece surface, have improved cooling effectiveness; And be arranged on the spray angle of forward cooling jet at water-cooled duct entry place greater than the reverse spray angle of cooling jet, better stoped cooling water to flow to outlet and it is all discharged from discharge outlet with rolled piece, avoided the influence to rear portion equipment.
Description of drawings
By the description of carrying out below in conjunction with the accompanying drawing that an example exemplarily is shown, above-mentioned and other purposes of the present invention and characteristics will become apparent, wherein:
Fig. 1 shows the structural representation of the forward spray nozzle of exemplary embodiment of the present.
Fig. 2 shows the structural representation of the reverse spray nozzle of exemplary embodiment of the present.
Fig. 3 is along the sectional view of A-A line among Fig. 1.
Fig. 4 shows the schematic diagram of the support deflector roll of wearing water-cooling apparatus of exemplary embodiment of the present.
Description of reference numerals:
100, rolled piece 1, nozzle body 2, nozzle chamber 3, injection channel 4, ring-type inner chamber.
The specific embodiment
Hereinafter, will describe in detail according to cooling jet of the present invention with exemplary embodiment by reference to the accompanying drawings and wear water-cooling apparatus.
In the exemplary embodiment of cooling jet in one aspect of the invention, described cooling jet comprises nozzle body and the nozzle chamber that supplies rolled piece to pass that is surrounded by nozzle body, wherein, described nozzle body comprises along the injection channel of its circumferential weld shape that circumferentially arranges, and be communicated with to feed the ring-type inner chamber of stablizing cooling medium (for example, cooling water, compressed air) to described injection channel with described injection channel; Described injection channel comprises the ejiction opening that is communicated with described nozzle chamber, and the cooling medium of described ejiction opening ejection and the opposite direction of rolled piece direction of advance or rolled piece direction of advance form the jet angle that is acute angle.Preferably, the injection channel of described circumferential weld shape is along leveling off to the direction of axis line convergence of nozzle body, and the opening degree of the ejiction opening of described injection channel is 1.5～2.0mm, and the number of degrees of described jet angle can be preferably 20～45 °.
In the present invention, the jet angle that forms of the cooling medium of ejiction opening ejection and rolled piece direction of advance is equivalent to the jet-core region line of injection channel of circumferential weld shape and the jet angle of rolled piece direction of advance formation.
In the exemplary embodiment of wearing water-cooling apparatus in another aspect of this invention, the described water-cooling apparatus of wearing comprises the water-cooled conduit, be arranged on the forward spray nozzle of water-cooled duct entry end, and the reverse spray nozzle and the reverse purge nozzle that are arranged on water-cooled conduit outlet end, described forward spray nozzle, oppositely spray nozzle and reverse purge nozzle adopt aforesaid cooling jet, and, the water (flow) direction of described forward spray nozzle ejection and rolled piece direction of advance are in the same way and form first jet angle, the water (flow) direction of described reverse spray nozzle ejection is reverse and form second jet angle with the rolled piece direction of advance, and it is reverse and form the 3rd jet angle that airflow direction that nozzle sprays and rolled piece direction of advance are swept in described reverse spray.
Preferably, described second jet angle and/or the 3rd jet angle are less than first jet angle, and for example, described first jet angle can be 36～45 °, and described second jet angle can be 20～35 °, and described the 3rd jet angle can be 20～35 °.First jet angle is bigger, the vertical component of a fluid stream is big when the rolled piece surface forms high-velocity fluid, big to rolled piece surface impacts power, be conducive to destroy the steam blanket on rolled piece surface, and the second water spray angle and the 3rd jet angle are little with respect to the first water spray angle, and its a fluid stream that oppositely sprays can improve the effect of blowback water shutoff.
After adopting said structure, when rolled piece was cooled off, cooling medium was full of the back along the injection channel ejection in the ring-type inner chamber, because injection channel is circumferential weld shape, cooling medium is sprayed on the surrounded surface of rolled piece from the ejiction opening of injection channel with ring-type, makes rolled piece obtain comprehensively cooling uniformly.Cooling water sprays to the rolled piece surface at a certain angle through the forward spray nozzle, has strengthened the film-cooled heat of cooling water, namely can destroy the steam blanket on rolled piece surface, improves cooling effectiveness, can produce motive force to rolled piece again, overcomes the water resistance of wearing of rolled piece.Reverse spray nozzle and reverse purge nozzle be the reverse rolled piece surface that sprays at a certain angle, plays the effect of shutoff cooling water in cooling.
Describe cooling jet of the present invention below with reference to accompanying drawings in detail and wear water-cooling apparatus.
Fig. 1 is the structural representation of the forward spray nozzle of exemplary embodiment of the present, Fig. 2 is the structural representation of the reverse spray nozzle of exemplary embodiment of the present, Fig. 3 be among Fig. 1 along the sectional view of A-A line, Fig. 4 is the schematic diagram of the support deflector roll of wearing water-cooling apparatus of exemplary embodiment of the present.
Wear in the water-cooling apparatus at bar, comprise and wear the water section, this is worn the water section and comprises the water-cooled conduit, and along the forward spray nozzle of rolled piece direction of advance layout, reverse spray nozzle and reverse purge nozzle.Wherein, the forward spray nozzle is arranged on the porch of water-cooled conduit, and oppositely spray nozzle and reverse purge nozzle are arranged on the exit of water-cooled conduit.Usually, also be provided with discharge outlet on the water-cooled conduit, discharge outlet is at the forward spray nozzle with oppositely between the spray nozzle and near reverse spray nozzle place.The forward spray nozzle is used for that cooling water is sprayed to the rolled piece surface along the rolled piece direction of advance and cools off, and the cooling water that sprays into flow to outlet with rolled piece; Oppositely spray nozzle also stops the water of coming with the rolled piece concurrent with the reverse surface that sprays to rolled piece of cooling water when cooling off, and it is flowed out from discharge outlet, thereby avoid the influence to rear portion equipment; Oppositely purge nozzle is with the reverse rolled piece surface that is sprayed onto of compressed air, and the part water that the rolled piece surface is taken out of blows clean and discharges from discharge outlet, and further shutoff cooling water when the rolled piece surface is purged improves cooling effect.In the present embodiment, the forward spray nozzle is connected with the external high pressure water source with reverse spray nozzle, and hydraulic pressure is 1.5～1.6MPa, and oppositely purge nozzle is connected with external air source, and compressed air pressure is 0.6～0.65MPa.
As Fig. 1, shown in Figure 3, the forward spray nozzle comprises nozzle body 1 and the nozzle chamber 2 that supplies rolled piece 100 to pass that is surrounded by nozzle body.Wherein, nozzle body 1 comprises along the injection channel 3 of its circumferential weld shape that circumferentially arranges, the ejiction opening of this injection channel 3 is communicated with nozzle chamber 2, and first jet angle of the cooling medium of ejiction opening ejection and 40 ° of rolled piece direction of advance formation (be among Fig. 1 θ angle be 40 °), as can be seen from Figure 2, this injection channel 3 is along the direction of axis line convergence of nozzle body 1, that is to say, the slit spacing of the injection channel 3 of this circumferential weld shape (or being called opening degree) diminishes to ejiction opening gradually from the entrance of injection channel 3, and, the opening degree of the ejiction opening of this injection channel is that 2.0mm(is, S among Fig. 1 is 2.0mm), the water spray area of forward spray nozzle is 4.71 * 10
-4m
2Flow and pressure are identical everywhere from the water of this forward spray nozzle ejection in order to make, on nozzle body along circumferentially setting up an annular cavity 4, and on this annular cavity 4, be evenly distributed with a plurality of inlet openings that enter injection channel 3 for cooling water along circumference, the quantity of this water inlet and pore size are chosen according to the flow of production scene cooling water, pressure etc., it mainly acts on is the cooling water that enough flows are provided for injection channel, for example, in this exemplary embodiment, annular cavity is evenly equipped with the inlet opening of 8 Ф 12mm vertically.
As shown in Figure 2, oppositely spray nozzle is identical with the basic structure of forward spray nozzle, the water (flow) direction of this reverse spray nozzle ejection and rolled piece direction of travel are reverse and form 20 ° second jet angle (be among Fig. 2 θ angle be 20 °), the opening degree of the ejiction opening of its injection channel is that 2.0mm(is, S among Fig. 1 is 2.0mm), oppositely the water spray area of spray nozzle is 5.338 * 10
-4m
2And, be to be evenly equipped with on the annular cavity that injection channel is communicated with the inlet opening of 10 Ф 12mm.
Oppositely the airflow direction of purge nozzle ejection and rolled piece direction of advance are reverse and form 30 ° the 3rd jet angle, the opening degree of the ejiction opening of its injection channel is 1.5mm, compressed air enters the injection channel of circumferential weld shape after by 10 uniform on annular cavity Ф 12mm air admission holes and from the ejiction opening ejection of injection channel, stops the water that flows out with the rolled piece surface and the steel surface is cooled off.
In actual applications, the said nozzle body can be designed as overall structure, the injection channel that has circumferential weld shape at this integrally-built nozzle body, perhaps, nozzle body can comprise two sub-nozzle bodies, two sub-nozzle bodies are installed the back and are cooperated the formation annulus, and this annulus is the injection channel of cooling water.That is to say that the generation type of injection channel of the present invention can be multiple, as long as can form the but injection channel of the medium circumferential weld shape of passing through of the cooling that circumferentially arranges along nozzle body.
Further, in wearing the water process, rolled piece just can play better cooling effect in the middle of only being in the water-cooled conduit, therefore set up the support deflector roll that is used for supporting the water-cooled conduit, improve the level height of rolled piece in conduit, rolled piece is in the middle of the conduit substantially, has not only reduced rolled piece in the process of walking to the wearing and tearing of conduit but also improved cooling effect effectively.
Now the bar with 200 * 200 billet rolling Ф 50mm is example, calculates at bar and wears cooling effect in the water-cooled process.Wherein, every square billet quality is 314Kg/m, and square billet length is 6m, and the square billet mass M is about 1884kg, and the specific heat capacity of steel is C=0.46 * 103J/ (kg ℃).The temperature of steel is t1=920 ℃ before field measurement is worn water.Because the internal and external temperature of steel is different after wearing the water section through two joints because after at once wearing water, to survey steel internal and external temperature temperature after equally behind the cold bed be t2=820 ℃ so we adopt.
Every joint is worn the cooling effect of water section: wear average each joint of cooling of water section and wear the water section and reduce temperature and be (t1-t2)/2 owing to passed through two joints.By heat release formula: Q put=CM(t1-t2)/2=0.46 * 103J/ (kg ℃) * 1884kg * (920 ℃-820 ℃)/2=43332kJ.Put by equation of heat balance Q suction=Q disregarding under the situation of energy loss, then each joint cooling water of wearing the water section absorbs the heat of taking away and is about 43332kJ in cooling procedure.
Average per second cooling water is taken away heat: because the speed of travel of steel is 2.193m/s, the density of steel is 7.85g/cm
3, the diameter of steel is Ф 50mm, heavy 15.42kg/m, and then the quality of the steel of cooling each second is 33.81606kg.Steel heat release each second Q1=CM(t1-t2 so)/2=0.46 * 103J/ (kg ℃) * 33.81606kg * (920 ℃-820 ℃)/2=777.76938kJ, put by equation of heat balance Q suction=Q disregarding under the situation of energy loss, then average per second cooling water absorbs heat 777.76938kJ.
In sum, cooling jet of the present invention sprays to the rolled piece surface with the mode of jet of ring-type with cooling medium, makes the temperature of wearing water bar surface obtain uniform reduction, reduces surface oxidation and line.Wear in the water device in water-cooled, jet direction and the rolled piece of cooling jet are angled, have increased film-cooled heat, have destroyed the steam blanket on rolled piece surface, have improved cooling effectiveness; And be arranged on the spray angle of forward cooling jet at water-cooled duct entry place greater than the reverse spray angle of cooling jet, better stoped cooling water to flow to outlet and it is all discharged from discharge outlet with rolled piece, avoided the influence to rear portion equipment.
Although above by having described the present invention in conjunction with exemplary embodiment, it will be apparent to those skilled in the art that under the situation that does not break away from the spirit and scope that claim limits, can carry out various modifications and change to exemplary embodiment of the present invention.
Claims (10)
1. a cooling jet is characterized in that, described cooling jet comprises nozzle body and the nozzle chamber that supplies rolled piece to pass that is surrounded by nozzle body, wherein,
Described nozzle body comprises along the injection channel of its circumferential weld shape that circumferentially arranges, and is communicated with stably feed the ring-type inner chamber of cooling medium to described injection channel with described injection channel;
Described injection channel comprises the ejiction opening that is communicated with described nozzle chamber, and the cooling medium of described ejiction opening ejection and the opposite direction of rolled piece direction of advance or rolled piece direction of advance form the jet angle that is acute angle.
2. cooling jet according to claim 1 is characterized in that, described nozzle body comprises two sub-nozzle bodies, and described two sub-nozzle bodies are installed the back and cooperated the injection channel that forms described circumferential weld shape.
3. cooling jet according to claim 1 is characterized in that, described ring-type inner chamber is along circumferentially being evenly distributed with the but aperture that passes through of medium of a plurality of coolings, and described aperture has the aperture that feeds enough flow cooling mediums to described injection channel.
4. cooling jet according to claim 1 is characterized in that, the injection channel of described circumferential weld shape is along leveling off to the direction convergence of axial line of nozzle body, and the opening degree of the ejiction opening of described injection channel is 1.5～2.0mm.
5. cooling jet according to claim 1 is characterized in that, described jet angle is 20～45 °.
6. wear water-cooling apparatus for one kind, comprise the water-cooled conduit, be arranged on the forward spray nozzle of water-cooled duct entry end, and the reverse spray nozzle and the reverse purge nozzle that are arranged on water-cooled conduit outlet end, it is characterized in that, described forward spray nozzle, oppositely spray nozzle and reverse purge nozzle adopt as any described cooling jet in the claim 1 to 4, and, the water (flow) direction of described forward spray nozzle ejection and rolled piece direction of advance are in the same way and form first jet angle, the water (flow) direction of described reverse spray nozzle ejection is reverse and form second jet angle with the rolled piece direction of advance, and it is reverse and form the 3rd jet angle that airflow direction that nozzle sprays and rolled piece direction of advance are swept in described reverse spray.
7. the water-cooling apparatus of wearing according to claim 6 is characterized in that, described second jet angle and/or the 3rd jet angle are less than first jet angle.
8. the water-cooling apparatus of wearing according to claim 6 is characterized in that, described first jet angle is 36～45 °, and described second jet angle is 20～35 °, and described the 3rd jet angle is 20～35 °.
9. the water-cooling apparatus of wearing according to claim 6, it is characterized in that, the opening degree of the injection channel ejiction opening of described forward spray nozzle is 1.8～2mm, the opening degree of the injection channel ejiction opening of described reverse spray nozzle is 1.8～2mm, and the opening degree of the injection channel ejiction opening of described reverse purge nozzle is 1.5～1.8mm.
10. the water-cooling apparatus of wearing according to claim 6 is characterized in that, the described water-cooling apparatus of wearing also comprises for the support deflector roll that supports described water-cooled conduit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101646505A CN103252366A (en) | 2013-05-07 | 2013-05-07 | Cooling spray nozzle and through-water cooling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101646505A CN103252366A (en) | 2013-05-07 | 2013-05-07 | Cooling spray nozzle and through-water cooling device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835954A (en) * | 2014-03-09 | 2014-06-04 | 杜明生 | Inlet fluid-infusion annular spraying device for MVR (mechanical vapor recompression) compressor |
| CN106984658A (en) * | 2017-03-31 | 2017-07-28 | 中冶南方工程技术有限公司 | DEVICE FOR BAR AND WIRE HOT ROLLING production line cooling device |
| CN107552749A (en) * | 2017-08-31 | 2018-01-09 | 山东莱钢永锋钢铁有限公司 | The billet caster that a kind of continuous small-billet casting method and this method use |
| CN107598314A (en) * | 2017-10-17 | 2018-01-19 | 广东大铁数控机械有限公司 | A kind of water spout of wire cutting machine tool |
| CN109201751A (en) * | 2018-11-14 | 2019-01-15 | 张占东 | A kind of two edge roll zones hot air device of aluminium foil mill band |
| CN111424149A (en) * | 2020-05-11 | 2020-07-17 | 江苏联峰实业有限公司 | Gear steel strip-shaped structure control process |
| CN113588199A (en) * | 2021-09-30 | 2021-11-02 | 中国空气动力研究与发展中心超高速空气动力研究所 | Reverse jet flow blockage degree test device and test method for hypersonic wind tunnel |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835954A (en) * | 2014-03-09 | 2014-06-04 | 杜明生 | Inlet fluid-infusion annular spraying device for MVR (mechanical vapor recompression) compressor |
| CN106984658A (en) * | 2017-03-31 | 2017-07-28 | 中冶南方工程技术有限公司 | DEVICE FOR BAR AND WIRE HOT ROLLING production line cooling device |
| CN107552749A (en) * | 2017-08-31 | 2018-01-09 | 山东莱钢永锋钢铁有限公司 | The billet caster that a kind of continuous small-billet casting method and this method use |
| CN107598314A (en) * | 2017-10-17 | 2018-01-19 | 广东大铁数控机械有限公司 | A kind of water spout of wire cutting machine tool |
| CN107598314B (en) * | 2017-10-17 | 2024-03-26 | 广东大铁数控机械有限公司 | Water spray nozzle for linear cutting machine |
| CN109201751A (en) * | 2018-11-14 | 2019-01-15 | 张占东 | A kind of two edge roll zones hot air device of aluminium foil mill band |
| CN111424149A (en) * | 2020-05-11 | 2020-07-17 | 江苏联峰实业有限公司 | Gear steel strip-shaped structure control process |
| CN113588199A (en) * | 2021-09-30 | 2021-11-02 | 中国空气动力研究与发展中心超高速空气动力研究所 | Reverse jet flow blockage degree test device and test method for hypersonic wind tunnel |
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Application publication date: 20130821 |