CN207621101U - Circumference combines the novel small billet withdrawal straightening machine hydraulic valve platform of high-quality special steel - Google Patents
Circumference combines the novel small billet withdrawal straightening machine hydraulic valve platform of high-quality special steel Download PDFInfo
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- CN207621101U CN207621101U CN201721737071.5U CN201721737071U CN207621101U CN 207621101 U CN207621101 U CN 207621101U CN 201721737071 U CN201721737071 U CN 201721737071U CN 207621101 U CN207621101 U CN 207621101U
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- valve
- directional control
- solenoid directional
- control valve
- pressure
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- 229910000831 Steel Inorganic materials 0.000 title description 14
- 239000010959 steel Substances 0.000 title description 14
- 239000003921 oil Substances 0.000 claims description 38
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims 2
- 230000006837 decompression Effects 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 10
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 230000000881 depressing effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 21
- 230000008901 benefit Effects 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 239000010729 system oil Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Abstract
The utility model discloses a kind of have an area of and combines small billet withdrawal straightening machine hydraulic valve platform, it is provided with the first, second pressure reducing valve, the oneth the 4th solenoid directional control valve, pass through the reasonable connection of solenoid directional control valve, different control oil circuit connections are set to cylinder rod chamber and rodless cavity, rod chamber can independent fuel feeding, can also simultaneously fuel feeding, to realize lifting and depressing for pulling-straightening roller, the differential amplification work(of cylinder structure can be utilized to be conveniently adjusted pressure, so that red base pressure stability is greatly improved, realizes successful application of the red base pressure low-pressure stability on conticaster.
Description
Technical field
The utility model is related to a kind of small billet of field of metallurgy circumferences to combine efficiently production continuous casting machine tension leveling machine hydraulic valve
Platform, specifically a kind of billet caster square billet producing high-quality special steel, round billet multibreak look unfamiliar are drawn when producing for controlling
Rectify the hydraulic control valve platform of machine withdrawing roll and the action of strong roller oil cylinder.
Background technology
It is difficult point that conticaster circumference, which combines co-production, and domestic enterprise is when ensureing round billet production not because of red base pressure at present
Fluctuation leads to the problem of sliding base and flattens, and opens arc groove using pulling-straightening roller, guide roller, but when high-quality billet production, pulling-straightening roller is led
To arc groove can will produce impression in casting billet surface.Solution be replaced when changing section pulling-straightening roller or do not slot turn down it is red
Base pressure, but red base pressure low pressure stability it is difficult to ensure that.Such as replace pulling-straightening roller.It is very long then to change the section time, serious to restrict
Direct motion is produced, it is great difficult problem that circumference, which combines the production of stable high-quality amount, at present in a word.
It is adaptation to market variations demand before this steel mill billet caster 2013 always based on square billet section,
The round billets sections such as 150,160,180,200 are developed within 2013, but find round billet ovality qualification rate one in process of production
It is straight to be in 90% hereinafter, cannot be satisfied round billet production technology quality requirement.
This large size steel enterprise steel mill also attempted pulling-straightening roller, guide roller opens arc groove mode, but square billet surface can produce
Raw bulge impression, quality is unqualified, can only replace pulling-straightening roller online, and totally 25 pulling-straightening rollers need to shut down 5 streams of online replacement every time
48 hours, it was too long to change the section time, serious to restrict production direct motion.
Special steel production is more demanding to casting billet surface impression, and it is great difficult problem that circumference, which combines the production of stable high-quality amount, both full
Sufficient round billet ovality requirement, and meet square billet surface and do not generate bulge impression, it is necessary that red base pressure low-pressure stability；It is existing
There is the red base pressure low-pressure stability of hydraulic system poor, pressure oscillation is larger, and pressure is low to will produce sliding base production accident, pressure Gao Yuan
Base ovality is unqualified, and red base pressure stability cannot achieve in 0.6Mpa in original hydraulic system.
Invention content
The utility model is to overcome prior art defect, optimizes and is transformed to hydraulic system, provides a kind of circumference knot
High-quality special steel billet caster withdrawal straightening machine hydraulic valve platform is closed, which is arranged different control oil circuit connection oil cylinders
Rod chamber and rodless cavity enable rod chamber and without rod spear while fuel feeding, utilize the design and cylinder structure of the utility model oil circuit
Differential enlarging function, can conveniently realize pressure adjusting, to realize that red base pressure low-pressure stability, pulling-straightening roller can not be opened
Slot need not replace pulling-straightening roller when changing section, both can guarantee that round billet does not flatten or can guarantee that square billet does not generate impression, realized circumference knot
Close the production of stable high-quality amount.
The utility model specifically adopts the following technical scheme that：
A kind of circumference combines small billet withdrawal straightening machine hydraulic valve platform, it is characterised in that the hydraulic valve platform is provided with first, the
The oil inlet input system hydraulic oil of two pressure reducing valves, the first-the four solenoid directional control valve, the first pressure reducing valve, oil outlet connection first
Solenoid directional control valve, the first solenoid directional control valve connect the second solenoid directional control valve, and the second solenoid directional control valve is connected to the rod chamber of oil cylinder；The
The oil inlet input system hydraulic oil of two pressure reducing valves, oil outlet connect the 4th solenoid directional control valve, the 4th solenoid directional control valve connection oil
The rodless cavity of cylinder；Third solenoid directional control valve one end is connected between the first, second solenoid directional control valve, and the other end is connected to second and subtracts
Between pressure valve and the 4th solenoid directional control valve；Second reversing solenoid valve and third reversing solenoid valve are additionally coupled to emptying oil circuit.
The present invention also provides a kind of circumferences, and small billet withdrawal straightening machine, the hydraulic system of the withdrawal straightening machine to be combined often to flow two liquid of setting
Pressure valve platform is respectively used to control drawing, roller oil cylinder and strong roller oil cylinder；The hydraulic valve platform combines small billet to draw using circumference above-mentioned
The machine of rectifying hydraulic valve platform.
Advantageous effect
The utility model by the reasonable connection of solenoid directional control valve, be arranged different control oil circuit connections to cylinder rod chamber with
Rodless cavity, rod chamber can independent fuel feeding, can also simultaneously fuel feeding can be utilized to realize lifting and depressing for pulling-straightening roller
The differential amplification work(of cylinder structure is conveniently adjusted pressure, and red base pressure stability is made to greatly improve, and realizes red base pressure low-pressure
Successful application of the stability on conticaster.Pulling-straightening roller can not slot, and pulling-straightening roller need not be replaced when changing section, you can ensure circle
Base does not flatten, and ensures that square billet surface does not generate bulge impression, can realize that circumference combines stability and high efficiency, high quality of production,
Equipment is provided for the production of high-quality special steel to ensure, is conducive to special steel Brand Promotion, is brought larger economic benefit.
Largely 150 round billets based on whole year accumulative 10776.26 tons of round billet of production, ton steel drop 154.8 yuan of this gain/
Ton, 166.8 ten thousand yuan of direct economic benefit；Accumulative production increases 29992.14 tons of section 175*220 sections newly, and ton steel net profit is by most
30 yuan/ton of low steel grade, 89.98 ten thousand yuan of direct economic benefit；Compared with hydraulic system before transformation, it can reduce because strand impression generates
Scrap 479.7 tons of strand, scrap 800 yuan/ton of strand and finished product strand ton steel minimum price difference, direct economic benefit 38.4 ten thousand
Member；Transformation year after next production direct economic benefit estimation reaches 295.2 ten thousand yuan.
The utility model realizes：
1, initial target：Meet GB standard and avoids flat zone ovality≤2.8%D；Flat zone ovality≤4.5%D
2, final goal：Meet industry user's consensus standard and avoids flat zone ovality≤2.5%D；Flat zone ovality
≤ 4.0%D；Ovality qualification rate >=98%
Description of the drawings
Fig. 1 is original hydraulic system schematic diagram；
Fig. 2 is the utility model hydraulic system principle figure；
Fig. 3 is the pressure-plotting of original hydraulic system oil cylinder；
Fig. 4 is the pressure-plotting of the utility model hydraulic system oil cylinder.
Specific implementation mode
By theoretical calculation and trial production real data test, systematic parameter is continued to optimize, meets production technology quality and wants
It asks
(1), theoretical calculation our factory billet caster effect strand pressure strand in >=0.4MPa is not in sliding base；
Strand flatness can be exceeded in >=0.8MPa for strand pressure, can not meet processing quality requirement；It is tested through pilot production, red base
Pressure is 0.6MPa, more properly.Straightening hydraulic pressure is divided into two kinds, and red base pressure refers to the pressure acted on red-hot strand
Power；Cold base pressure on the other side refers to the pressure acted on dummy bar and cold conditions strand.
(2), when original system such as strand pressure setting 0.6MPa, red base pressure just needs to be set as 0.6MP, hydraulic system pressure
Power pressure oscillation in 1MPa or less is larger, it may appear that sliding base accident or the exceeded quality problems of strand ovality can not produce
150 round billets.
(3), when Tthe utility model system strand pressure setting 0.6MPa, red base pressure can amplify according to differential principle
2.12 times, it is set as 1.27MPa, red base pressure stability greatly improves, and not only anti-on-slip base accident but also strand circularity can be improved
Qualification rate.Through experimental test, 150 round billets that system pressure is produced in 0.6MP avoid flat zone ovality≤2.5%D；It is flat
Area's ovality≤4.0%D, reaches research objective.
What the purpose of this utility model was realized in：
By the optimization design of hydraulic system, hydraulic system is enable to realize the differential enlarging function of oil cylinder.Practical function exists
When pressure 0.6Mpa on strand, the red base pressure of system can be set as 1.27Mpa, when red base pressure is more than 1.0Mpa, system
Pressure stability greatly improves.
(1), original hydraulic system schematic diagram
As shown in Figure 1, the red base pressure of original hydraulic system is realized after system pressure is adjusted by direct acting pressure, lead to
Solenoid directional control valve control withdrawing roll and the lifting of strong roller are crossed, it is consistent with red base pressure to be applied to the pressure on hot strand by oil cylinder,
To ensure that round billet ovality is up to standard, the red base pressure of original hydraulic system will be adjusted to 0.6Mpa, and pressure-reducing valve for hydraulic system exists at present
Pressure oscillation is big when 1.0Mpa or less, it is difficult to stablize.As shown in Figure 3.The system is directly by pressure reducing valve by system pressure 10Mpa
Pressure oscillation is larger when being once depressurized to red base pressure 0.6Mpa, when hot base pressure fluctuates big upwards, round billet can be caused oval
It spends exceeded；When hot base pressure fluctuates big downwards, it may occur that sliding base production accident cannot meet processing quality requirement.
(2), the utility model hydraulic system principle figure
As shown in Fig. 2, by being optimized to hydraulic system of tension leveller, original system has 5 streams altogether, often flows a valve
Platform, new system are optimized for two valve platforms of every stream, draw, rectify roller oil cylinder by the control of separate valves platform, each stream is controlled by original 4 24V
It is 14 control points that system point, which increases, can conveniently realize the differential enlarging function of oil cylinder using the hydraulic system, and amplification factor is
2.12。
Specifically, each valve platform is provided with the first, second pressure reducing valve, the first-the four solenoid directional control valve, the first pressure reducing valve
Oil inlet input system hydraulic oil, oil outlet connect the first solenoid directional control valve, and the first solenoid directional control valve connects the second electromagnetic switch
Valve, the second solenoid directional control valve are connected to the rod chamber of oil cylinder；The oil inlet input system hydraulic oil of second pressure reducing valve, oil outlet connection
4th solenoid directional control valve, the 4th solenoid directional control valve are connected to the rodless cavity of oil cylinder；Third solenoid directional control valve one end is connected to first,
Between two solenoid directional control valves, the other end is connected between the second pressure reducing valve and the 4th solenoid directional control valve；Second reversing solenoid valve and
Third reversing solenoid valve is additionally coupled to emptying oil circuit.In Fig. 2, system hydraulic pressure is P, and the first pressure reducing valve downstream pressure is hydraulic system
Red base pressure P1, the second pressure reducing valve downstream pressure are the cold base pressure P2 of hydraulic system.
Wherein first and third, four solenoid directional control valves are double control valve, and the second solenoid directional control valve is single control valve.First electromagnetic switch
Two control points of valve are 1#, 2# electromagnet (1,2 in Fig. 2), and a control point of the second solenoid directional control valve is 3# electromagnet (figure
In 2 3), two control points of third solenoid directional control valve be 4#, 5# electromagnet (4,5 in Fig. 2), two of the 4th solenoid directional control valve
Control point is 6#, 7# electromagnet (6,7 in Fig. 2), and each valve platform has 7 control points altogether.
The utility model circumference combines small billet withdrawal straightening machine hydraulic valve platform that can be controlled by shown in straightening valve platform control table
System：
When the red base of round billet being drawn to depress, the first, second, third and fourth Elactro magnetic commutator forward conduction, at this point, rod chamber and rodless cavity
Fuel feeding simultaneously draws, rectifys under roll-in, using the differential principle of oil pressure in rod chamber and rodless cavity, makes red base under same stress, be
Red base pressure of uniting is improved.
Differential function, oil cylinder upper and lower cavity while fuel feeding are used when drawing the red base of round billet to depress, such upper and lower cavity oil cylinder is because having
Rod cavity and rodless cavity area offset each other a part, make to act on the power on hot strand and reduce, same stress, red base pressure
Without using 0.6Mpa need to be adjusted to when differential function, (can pass through for 1.27Mpa using red base pressure adjustable after differential function is whole
Design oil cylinder upper and lower cavity difference in areas ratio is controlled), hydraulic system pressure stability in 1Mpa or more is substantially improved.
When drawing square billet, first and second, four Elactro magnetic commutator forward conductions, third Elactro magnetic commutator reverse-conducting, at this point, having
Rod cavity fuel feeding, rodless cavity emptying is drawn, strong roller lifts.
When the cold base of square billet being drawn to depress, the first, second, the 4th Elactro magnetic commutator reverse-conducting, third Elactro magnetic commutator forward direction
Conducting, at this point, rod chamber emptying, draws, rectifys under roll-in.
When the red base of square billet being drawn to depress, first and third, four Elactro magnetic commutator forward conductions, the second Elactro magnetic commutator reverse-conducting,
At this point, rod chamber emptying, rodless cavity fuel feeding, draw, rectify under roll-in.
When drawing round billet：The first and second, four Elactro magnetic commutator forward conductions, third Elactro magnetic commutator reverse-conducting, at this point, having
Rod cavity fuel feeding, rodless cavity emptying is drawn, strong roller lifts.
When the cold base of round billet being drawn to depress, the first, second, the 4th Elactro magnetic commutator reverse-conducting, third Elactro magnetic commutator forward direction
Conducting, at this point, rod chamber emptying, draws, rectifys under roll-in.
It is illustrated in figure 4 the pressure distribution of the utility model hydraulic system oil cylinder, pressure of the practical function on strand
When 0.6Mpa, red base pressure is 0.6*2.12=1.27Mpa, and red base pressure stability greatly improves.
Straightening valve platform control table
Claims (4)
1. a kind of circumference combines small billet withdrawal straightening machine hydraulic valve platform, it is characterised in that the hydraulic valve platform is provided with first, second
The oil inlet input system hydraulic oil of pressure reducing valve, the first-the four solenoid directional control valve, the first pressure reducing valve, the first electricity of oil outlet connection
Magnetic reversal valve, the first solenoid directional control valve connect the second solenoid directional control valve, and the second solenoid directional control valve is connected to the rod chamber of oil cylinder；Second
The oil inlet input system hydraulic oil of pressure reducing valve, oil outlet connect the 4th solenoid directional control valve, and the 4th solenoid directional control valve is connected to oil cylinder
Rodless cavity；Third solenoid directional control valve one end is connected between the first, second solenoid directional control valve, and the other end is connected to the second decompression
Between valve and the 4th solenoid directional control valve；Second reversing solenoid valve and third reversing solenoid valve are additionally coupled to emptying oil circuit.
2. circumference as described in claim 1 combines small billet withdrawal straightening machine hydraulic valve platform, it is characterised in that in first and third, four electricity
Magnetic reversal valve is double control valve, and the second solenoid directional control valve is single control valve.
3. circumference as described in claim 1 combines small billet withdrawal straightening machine hydraulic valve platform, it is characterised in that after the first pressure reducing valve valve
Pressure is the red base pressure of hydraulic system, and the second pressure reducing valve downstream pressure is the cold base pressure of hydraulic system.
4. a kind of circumference combines small billet withdrawal straightening machine, it is characterised in that hydraulic system often flows two hydraulic valve platforms of setting, uses respectively
In control drawing, roller oil cylinder and strong roller oil cylinder；The hydraulic valve platform is that any circumference combination small billets of claim 1-3 are drawn
The machine of rectifying hydraulic valve platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721737071.5U CN207621101U (en) | 2017-12-12 | 2017-12-12 | Circumference combines the novel small billet withdrawal straightening machine hydraulic valve platform of high-quality special steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721737071.5U CN207621101U (en) | 2017-12-12 | 2017-12-12 | Circumference combines the novel small billet withdrawal straightening machine hydraulic valve platform of high-quality special steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207621101U true CN207621101U (en) | 2018-07-17 |
Family
ID=62823286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721737071.5U Withdrawn - After Issue CN207621101U (en) | 2017-12-12 | 2017-12-12 | Circumference combines the novel small billet withdrawal straightening machine hydraulic valve platform of high-quality special steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207621101U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906069A (en) * | 2017-12-12 | 2018-04-13 | 南京钢铁股份有限公司 | Circumference combines high-quality special steel new small billet withdrawal straightening machine hydraulic valve platform and control method |
| CN109108241A (en) * | 2018-10-30 | 2019-01-01 | 中国重型机械研究院股份公司 | A kind of hydraulic control system for conticaster production |
-
2017
- 2017-12-12 CN CN201721737071.5U patent/CN207621101U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906069A (en) * | 2017-12-12 | 2018-04-13 | 南京钢铁股份有限公司 | Circumference combines high-quality special steel new small billet withdrawal straightening machine hydraulic valve platform and control method |
| CN107906069B (en) * | 2017-12-12 | 2024-01-09 | 南京钢铁股份有限公司 | Hydraulic valve table of square and round combined small square billet withdrawal and straightening machine and control method |
| CN109108241A (en) * | 2018-10-30 | 2019-01-01 | 中国重型机械研究院股份公司 | A kind of hydraulic control system for conticaster production |
| CN109108241B (en) * | 2018-10-30 | 2024-02-20 | 中国重型机械研究院股份公司 | Hydraulic control system for continuous casting machine production |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180717 Effective date of abandoning: 20240109 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180717 Effective date of abandoning: 20240109 |