CN108194447A - The hydraulic system controlled for fan-shaped section under slab continuous casting weight - Google Patents
The hydraulic system controlled for fan-shaped section under slab continuous casting weight Download PDFInfo
- Publication number
- CN108194447A CN108194447A CN201810276856.XA CN201810276856A CN108194447A CN 108194447 A CN108194447 A CN 108194447A CN 201810276856 A CN201810276856 A CN 201810276856A CN 108194447 A CN108194447 A CN 108194447A
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- Prior art keywords
- pressure
- pushing
- hydraulic
- cylinder
- control valve
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0846—Electrical details
- F15B13/086—Sensing means, e.g. pressure sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B2013/0409—Position sensing or feedback of the valve member
Abstract
The hydraulic system that fan-shaped section controls under slab continuous casting weight is used for the present invention provides a kind of, including：Fuel feeding source device pushes control valve group, promotes control valve group, lower pressure cylinder and lifting hydraulic cylinder；For the hydraulic pressure provided using the fuel feeding source device, by providing required hydraulic pressure to the lower pressure cylinder, between the motion bar and cylinder body of the control lower pressure cylinder relative motion occurs for the pushing control valve group, upper rod to be driven to push；The promotion control valve group for the hydraulic pressure provided using the power source, by the hydraulic pressure needed for being provided to the lifting hydraulic cylinder, is controlled and relative motion occurs between the motion bar and cylinder body of the lifting hydraulic cylinder, lower roll to be driven to be promoted；The system is used to the fan-shaped section be driven to push, and by the pushing of the fan-shaped section, squeeze the required position of strand by the pushing of the upper roller and/or the promotion of the lower roll.
Description
Technical field
The present invention relates to iron and steel domain more particularly to a kind of hydraulic pressure systems controlled for fan-shaped section under slab continuous casting weight
System.
Background technology
Continuous casting, it will be appreciated that for continuous casting steel machine, in general flow, the idiographic flow of continuous casting steel machine is：Molten steel constantly passes through
Water mold pulls straight after congealing into hard shell from crystallizer lower exit port, through water-spraying control, is all cut into blank after solidification
Foundry technology process.
Wherein, there is segregation in the inside center of strand, can solve the problems, such as this by the technique of continuous casting light pressure, so
And the problem of for slab strand internal defect and shrinkage cavity, in existing the relevant technologies, lack effective apparatus and method for slab
Strand internal defect is handled with shrinkage cavity.
Invention content
The present invention provides a kind of hydraulic system controlled for fan-shaped section under slab continuous casting weight, to solve in slab strand
Portion is loose and the problem of shrinkage cavity.
According to the first aspect of the invention, a kind of hydraulic pressure system controlled for fan-shaped section under slab continuous casting weight is provided
System, including：Fuel feeding source device pushes control valve group, promotes control valve group, lower pressure cylinder and lifting hydraulic cylinder；
The pushing control valve group, for the hydraulic pressure provided using the fuel feeding source device, by the pushing hydraulic pressure
Cylinder provides required hydraulic pressure, and relative motion occurs between the motion bar and cylinder body of the control lower pressure cylinder, to drive under upper rod
Pressure；
The promotion control valve group, for the hydraulic pressure provided using the power source, by the promotion hydraulic pressure
Cylinder provide needed for hydraulic pressure, control and relative motion occur between the motion bar and cylinder body of the lifting hydraulic cylinder, lower roll to be driven to carry
It rises；
The system is used to the fan-shaped section be driven to push by the pushing of the upper roller and/or the promotion of the lower roll,
And by the pushing of the fan-shaped section, squeeze the required position of continuous casting formation stages strand.
Optionally, position needed for described refers to the solidified tail end of liquid core of the strand, and strand can be generated 15 millimeters with
On reduced down in thickness volume under pressure.
Optionally, the system, further includes detection device and control device,
The detection device obtains the first relative displacement and/or the second relative displacement for detecting, the described first opposite position
The relative displacement of the motion bar and cylinder body that refer to the lower pressure cylinder is moved, second relative displacement refers to the lifting hydraulic cylinder
The relative displacement of motion bar and cylinder body；
The control device, for according to first relative displacement, controlling the pushing control valve group under corresponding
Pressure cylinder provide hydraulic pressure and/or：According to second relative displacement, the promotion control valve group is controlled to corresponding promotion
Hydraulic cylinder provides hydraulic pressure.
Optionally, the pushing control valve group includes pushing servo valve, and the pushing servo valve is respectively communicated to the confession
Oil source apparatus and lower pressure cylinder；The control device is specifically used for according to first relative displacement, and the pushing is controlled to watch
The unlatching for taking valve, the degree closed and opened；
The promotion control valve group includes promoting servo valve, and the promotion servo valve is respectively communicated to the fuel feeding source device
With the lifting hydraulic cylinder；The control device is specifically used for according to second relative displacement, controls the promotion servo valve
Unlatching, close and open degree.
Optionally, the pushing control valve group, which further includes, pushes solenoid directional control valve, the first pushing hydraulic lock, second time hydraulic fluid
Pressure lock, return filter and threeway proportional pressure-reducing valve；
The P mouths for pushing solenoid directional control valve, described first push the first port of hydraulic lock and oil supply source dress
It puts and interconnects, the T mouths for pushing solenoid directional control valve, the T mouths of the threeway proportional pressure-reducing valve and the pushing servo valve
T mouths interconnect；
Second port of the first pushing hydraulic lock is connected to the P mouths for pushing servo valve, the pushing servo valve
B mouths be connected to it is described second push hydraulic lock the second port, it is described second pushing hydraulic lock the first port be connected to institute
State the rod chamber of lower pressure cylinder；
The rodless cavity of the lower pressure cylinder connects the first port of the return filter, and the of the return filter
Two ports are connected to the A mouths of the threeway proportional pressure-reducing valve.
Optionally, the pushing control valve group, which further includes, pushes high pressure filter, first pressure sensor, second pressure biography
Sensor, it is described to push the first port and the lower pressure cylinder that high pressure filter is set on the described second pushing hydraulic lock and have bar
Between chamber；
The first pressure sensor is used to detect the rod chamber of the lower pressure cylinder and the pushing high pressure filter
Between pressure, the second pressure sensor be used to detecting the rodless cavity of the lower pressure cylinder and the return filter it
Between pressure.
Optionally, the promotion control valve group further includes and promotes solenoid directional control valve, the first promotion hydraulic lock and second is promoted
Hydraulic lock, the B mouths for promoting solenoid directional control valve are connected to the P mouths for promoting servo valve, the T mouths of the solenoid directional control valve
It is connected to the T mouths for promoting servo valve；
First port of the first promotion hydraulic lock is connected to the rod chamber of the lifting hydraulic cylinder, and described first is promoted
Second port of hydraulic lock is connected to the A mouths for promoting servo valve, and the first port of the second promotion hydraulic lock is connected to
The rodless cavity for promoting servo valve, second port of the second promotion hydraulic lock, which is connected to the servo valve that promoted, bar
Chamber.
Optionally, the promotion control valve group further includes the first promotion high pressure filter, second promotes high pressure filter, the
Three pressure sensors and the 4th pressure sensor；
Described first, which promotes high pressure filter, is set on the described first the first port for promoting hydraulic lock and the promotion hydraulic pressure
Between the rod chamber of cylinder, the first port that the second promotion high pressure filter is set on the described second promotion hydraulic lock is carried with described
Between the rodless cavity for rising hydraulic cylinder；
The rod chamber that the third pressure sensor is used to detect the lifting hydraulic cylinder is pressed through with the described first promotion height
Pressure between filter, the rodless cavity that the 4th pressure sensor is used to detect the lifting hydraulic cylinder are promoted with described second
Pressure between high pressure filter.
Optionally, the system further includes pushing servo amplifier and promotes servo amplifier, and the pushing is watched
It takes amplifier and connects the control device and the control terminal for pushing servo valve respectively, the promotion servo amplifier connects respectively
Connect the control device and the control terminal for promoting servo valve.
Optionally, the fuel feeding source device includes liquid case, temperature sensor, heating unit, high pressure pump group, heat sink；
The temperature sensor, for detecting the temperature of liquid in the liquid case；
The heating unit, in the liquid case fluid temperature be less than the first temperature value when to the liquid in the liquid case
Body is heated；
The heat sink, in the liquid case temperature be higher than second temperature value when to the liquid in the liquid case into
Row cooling, wherein, the second temperature value is higher than first temperature value；
The high pressure pump group, in the liquid case temperature higher than the first temperature value and less than the second temperature value when
Using the liquid in the liquid case, to the pushing control valve group and control valve group supply hydraulic pressure is promoted.
Provided by the present invention under slab continuous casting weight fan-shaped section control hydraulic system, by fuel feeding source device, under
Pressure control valve group promotes control valve group, lower pressure cylinder and lifting hydraulic cylinder, can realize the pushing of upper roller and proposing for lower roll
It rises, the fan-shaped section is driven to push, and pass through the fan-shaped section by the pushing of the upper roller and/or the promotion of the lower roll
It pushes, squeezes the required position of continuous casting formation stages strand, such as the solidified tail end of liquid core of strand can be squeezed, and then by squeezing
Pressure, can be such that center porosity is just pressed in its formation stages with shrinkage cavity, so as to eliminate casting blank defect.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the structure diagram one of a hydraulic system of the invention；
Fig. 2 is the control principle schematic diagram one of a hydraulic system of the invention；
Fig. 3 is the control principle schematic diagram two of a hydraulic system of the invention；
Fig. 4 is the structure diagram of pressure control valve group once of the invention；
Fig. 5 is the structure diagram that the present invention one promotes control valve group；
Fig. 6 is the structure diagram of a control valve platform of the invention；
Fig. 7 is the structure diagram of a fuel feeding source device of the invention.
Reference sign：
1- fuel feeding source devices；
11- liquid cases；12- high pressure pump groups；13- heating units；14- temperature sensors；15- heat sinks；16- power control cabinets；
17- recursive filters；18- liquid level gauges；19- electromagnetic water valves；110- recycles pump group；111- electromagnetic relief valves；
2- pushes control valve group；
20- pushes servo valve；21- first pushes hydraulic lock；22- second pushes hydraulic lock；23- pushes solenoid directional control valve；
24- return filters；25- threeway proportional pressure-reducing valves；26- pushes high pressure filter；27- first pressure sensors；28- second is pressed
Force snesor；29- failures open entrance；210- oil-return accumulators；211- high pressure accumulator devices；212- safety valves；
201- entrances push control valve group；202- outlets push control valve group；
Pressure cylinder under 3-；
4- promotes control valve group；
40- promotes servo valve；41- first promotes hydraulic lock；42- second promotes hydraulic lock；43- promotes solenoid directional control valve；
44- first promotes high pressure filter；45- second promotes high pressure filter；46- third pressure sensors；The 4th pressure sensings of 47-
Device；The first safety valves of 48-；The second safety valves of 49-；410- pressure difference relays；
5- lifting hydraulic cylinders；
6- detection devices；60- displacement sensors；
7- control devices；
81- pushes servo amplifier；
82- promotes servo amplifier；
91- upper rollers；
92- lower rolls.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Term " first ", " second ", " third " " in description and claims of this specification and above-mentioned attached drawing
The (if present)s such as four " are the objects for distinguishing similar, and specific sequence or precedence are described without being used for.It should manage
The data that solution uses in this way can be interchanged in the appropriate case, so as to the embodiment of the present invention described herein can in addition to
Here the sequence other than those for illustrating or describing is implemented.In addition, term " comprising " and " having " and their any deformation,
Be intended to cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or setting
It is standby to be not necessarily limited to those steps clearly listed or unit, but may include not listing clearly or for these mistakes
The intrinsic other steps of journey, method, product or equipment or unit.
Technical scheme of the present invention is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and the same or similar concept or process may be repeated no more in some embodiments.
Fig. 1 is the structure diagram one of a hydraulic system of the invention.
It please refers to Fig.1, provides a kind of hydraulic system controlled for fan-shaped section under slab continuous casting weight, including：Fuel feeding
Source device 1 pushes control valve group 2, promotes control valve group 4, lower pressure cylinder 3 and lifting hydraulic cylinder 5；
The pushing control valve group 2, for the hydraulic pressure provided using the fuel feeding source device 1, by the lower hydraulic fluid
Cylinder pressure 3 provides required hydraulic pressure, relative motion occurs between the motion bar and cylinder body of the control lower pressure cylinder 3, in drive
Rod pushes.
The promotion control valve group 4, for the hydraulic pressure provided using the power source 1, by the promotion liquid
Cylinder pressure 5 provides required hydraulic pressure, controls and relative motion occurs between the motion bar and cylinder body of the lifting hydraulic cylinder 5, under drive
Roller is promoted.
Hydraulic cylinder therein can be regarded as：By hydraulic energy be changed into mechanical energy, do straight reciprocating motion (or swing fortune
It is dynamic) hydraulic actuator.In one of which embodiment, hydraulic oil can be used to realize in hydraulic pressure.
The system is used to the fan-shaped section be driven to push by the pushing of the upper roller and/or the promotion of the lower roll,
And by the pushing of the fan-shaped section, squeeze the required position of continuous casting formation stages strand.Wherein, fan-shaped section can be direct or indirect
Upper roller or lower roll are connected, such as is attached using frame.
Wherein, the required position can refer to the solidified tail end of liquid core of the strand, and can generate 15 millimeters to strand
Above reduced down in thickness volume under pressure.
In order to solve the problems, such as slab continuous-cast blank internal defect and shrinkage cavity, can be depressed by increasing continuous casting machine fan-shaped segment
Amount ensures the mechanical performance of rolled steel with this, it is ensured that the quality of steel plate.In order to coordinate the technique of fan-shaped section under this weight
It realizes, can be used has the function of under weight and the hydraulic system of slighter compress.The hydraulic system that the present embodiment is related at least can be real
Press function is now weighed, in specific implementation process, by adjustment is reasonably configured, can also be achieved slighter compress function.
So the cardinal principle of production operation technique is under weight：In strand solidified tail end of liquid core this point, to strand
Apply the reduced down in thickness drafts of more than 15mm, by the extruding to strand herein, center porosity is made to form rank at it with shrinkage cavity
Section is just pressed, so as to eliminate casting blank defect.In one of which embodiment, this fan-shaped section does not use conventional fan-shaped section,
And fan-shaped section under the weight specially designed is used, fan-shaped section disclosure satisfy that the reduced down in thickness for implementing more than 15mm to strand under weight
Drafts.Fan-shaped section can be controlled by hydraulic system that the present embodiment is related under weight.
Fig. 2 is the control principle schematic diagram one of a hydraulic system of the invention.
In one of which embodiment, please referring to Fig.2, the system further includes detection device 6 and control device 7,
The detection device 6 obtains the first relative displacement and/or the second relative displacement for detecting.
First relative displacement refers to the relative displacement of the motion bar and cylinder body of the lower pressure cylinder 3, second phase
Refer to the relative displacement of the motion bar and cylinder body of the lifting hydraulic cylinder 5 to displacement.
Fig. 3 is the control principle schematic diagram two of a hydraulic system of the invention.
In order to detect displacement, detection device 6 can specifically include one or more displacement sensors, can be respectively arranged at
Lower 3 lifting hydraulic cylinder 5 of pressure cylinder.It, can be anti-by electrical signal by the displacement data detected by displacement sensor 60
Control device 7 is fed to, can specifically the signal of Profibus-DP agreements be utilized to be transmitted.
The control device 7, for according to first relative displacement, controlling the pushing control valve group 2 to corresponding
Lower pressure cylinder 3 provide hydraulic pressure and/or：According to second relative displacement, 4 groups of the promotion control valve is controlled to corresponding
Lifting hydraulic cylinder 5 provides hydraulic pressure.
In specific implementation process, the pushing control valve group 2 includes pushing servo valve 20, and the pushing servo valve 20 is distinguished
It is connected to the fuel feeding source device 1 and lower pressure cylinder 3；The control device 7 is specifically used for according to first relative displacement,
Control the unlatching for pushing servo valve 20, the degree closed and opened.
Since the depressing force of fan-shaped section can be bigger than the depressing force of common fan-shaped section, if the roller roller diameter of surrounding fan-shaped section
It is smaller, it can reduce roller stress around lower roll by increasing lower roll lifting capacity, protect the roller of surrounding fan-shaped section.Push knot
Shu Hou, lower roll decline, and back to zero position is used as ordinary sector section.So the mode that can be promoted to lower roll is designed,
In：
The promotion control valve group 4 includes promoting servo valve 40, and the promotion servo valve 40 is respectively communicated to the fuel feeding
Source device 1 and the lifting hydraulic cylinder 5；The control device 7 is specifically used for according to second relative displacement, is carried described in control
The unlatching for rising servo valve 40, the degree closed and opened.
The servo valve of hydraulic control can be understood as electric signal input being converted to the larger pressure of power or flow pressure signal
The executive component of output.And then after electric simulation signal is received, servo valve can accordingly export the flow and pressure of modulation.Its
It can be applied to as the pushing servo valve 20 with promoting servo valve 40.
In addition, " being connected to " involved by the present embodiment is appreciated that comprising the arbitrary of directly connection and indirect communication
Situation.
The system further includes and pushes servo amplifier 81 and promote servo amplifier 82, and the pushing servo is put
Big device 81 connects the control device 7 and the control terminal for pushing servo valve 20 respectively, and the promotion servo amplifier 82 divides
The control device 7 and the control terminal for promoting servo valve 40 are not connected.
Action is realized mainly by position control closed loop.Pressure sensor is designed with, and can record in each chamber of hydraulic cylinder
Pressure under each drafts down, is converted by mechanical balance, and the depressing force of each drafts is calculated.The pressure of gained
On the one hand power can be used for verifying the accuracy of technologic mechanics model, so as to Optimized model, improve product quality.On the other hand,
When the displacement sensor of hydraulic cylinder breaks down, system can be switched to depressing force closed loop control according to the depressing force in database
System, when reaching the corresponding depressing force of displacement, that is, thinks to reach desired value, locks circuit.It can ensure the continuous of production in this way
Property, system stability is improved, ensures yield.
Fig. 4 is the structure diagram of pressure control valve group once of the invention.
It please refers to Fig.4, the pushing control valve group 2, which further includes, to be pushed solenoid directional control valve 23, first and push hydraulic lock 21, the
Two push hydraulic lock 22, return filter 24 and threeway proportional pressure-reducing valve 25；
The P mouths for pushing solenoid directional control valve 23, described first push the first port of hydraulic lock 21 and the fuel feeding
Source device 1 interconnects, described to push the T mouths of solenoid directional control valve 23, the T mouths of the threeway proportional pressure-reducing valve 25 and described
The T mouths for pushing servo valve 20 interconnect；
Second port of the first pushing hydraulic lock 21 is connected to the P mouths for pushing servo valve, the pushing servo
The B mouths of valve 20 are connected to the described second the second port for pushing hydraulic lock 22, and described second pushes the first port of hydraulic lock 22
It is connected to the rod chamber of the lower pressure cylinder 3；
The rodless cavity of the lower pressure cylinder 3 connects the first port of the return filter 24, the return filter
24 the second port is connected to the A mouths of the threeway proportional pressure-reducing valve 25.
Fan-shaped section can direct or indirect connection upper roller 91 or lower roll 92, such as be attached by frame.
Wherein, the first port of hydraulic lock, such as the A mouths of hydraulic lock are can be regarded as, the second port of hydraulic lock, such as can
The B mouths of hydraulic lock are interpreted as, hydraulic lock can also have other X mouthfuls and/or Y mouthfuls etc..
In one of which embodiment, the pushing control valve group 2 further includes and pushes high pressure filter 26, first pressure passes
Sensor 27, second pressure sensor 28, the high pressure filter 26 that pushes lead to set on the first of the described second pushing hydraulic lock 22
Between mouth and the rod chamber of the lower pressure cylinder 3；
The first pressure sensor 27 is used to detect the rod chamber of the lower pressure cylinder 3 and the pushing high-pressure filteration
Pressure between device 26, the second pressure sensor 28 are used to detect the rodless cavity of the lower pressure cylinder 3 and the oil return
Pressure between filter 24.
Operation principle can be regarded as：
It during pushing, pushes solenoid directional control valve 23 and is powered, open first and push the pushing hydraulic lock 22 of hydraulic lock 21 and second, with
Liquid for hydraulic oil enters the rod chamber of lower pressure cylinder 3 by pushing servo valve 20, and it is left and right to be specifically as follows fan-shaped section
The rod chamber of two lower pressure cylinders 3, and then, the motion bar of lower pressure cylinder 3 can be fixed, and cylinder body is in the work of hydraulic oil
Under, fan-shaped section can be driven to move downward, the rodless cavity volume of oil cylinder becomes smaller, and extra hydraulic oil is through return filter 24, threeway
25 oil return box of proportional pressure-reducing valve completes pressure action.
It during promotion, pushes solenoid directional control valve 3 and is powered, open first and push the pushing hydraulic lock 22 of hydraulic lock 21 and second, oil
Liquid by taking hydraulic oil as an example enters rodless cavity by threeway proportional pressure-reducing valve 25, and motion bar is fixed, and cylinder body is in hydraulic oil
Under the action of, fan-shaped section is driven to move upwards, rod chamber volume becomes smaller, and extra hydraulic oil passes through through pushing high pressure filter 26
20 oil return box of servo valve is pushed, completes enhancing action.
It, can the feedback progress based on the displacement sensor of detection device 6 on lower pressure cylinder 3 wherein to the control of drafts
Control for example, when reaching predetermined drafts (generally 15mm), pushes servo valve 20 and goes back to middle position, then push electromagnetic switch
23 dead electricity of valve, the first pushing hydraulic lock 21 and second pushes hydraulic lock 22 and locks circuit, so as to which the size of drafts be made to keep not
Become, form stable drafts, complete technological requirement under weight.
Wherein to the control of depressing force, mainly reliable threeway proportional pressure-reducing valve 25 provides back pressure to the size of depressing force, passes through
Change the size of the input voltage signal amount of threeway proportional pressure-reducing valve 25, the back-pressure of rodless cavity is controlled, so as to meet difference
The requirement of the strand depressing force of kind.
Based on threeway proportional pressure-reducing valve 25, the hydraulic system can have the function of under weight and slighter compress, when production needs
During slighter compress technique productions, pattern switching slighter compress pattern under weight need to only change the control signal of threeway proportional pressure-reducing valve 25,
Its back pressure is adjusted, slighter compress function can be realized according to the setting of slighter compress technology pattern in fan-shaped section action control, is set without repeating
Fan-shaped section slighter compress valve platform is put, it is cost-effective, you can to save equipment investment.
It is realized since upper roller 91 is acted mainly by position control closed loop.Pressure can be connected in each chamber of hydraulic cylinder to pass
Sensor, and the pressure under each drafts can be recorded, it is converted by mechanical balance, the pressure of each drafts is calculated
Power.On the one hand the depressing force of gained can be used for verifying the accuracy of technologic mechanics model, so as to Optimized model, improve product
Quality.On the other hand, when the displacement sensor of hydraulic cylinder breaks down, system can switch according to the depressing force in database
To depressing force closed-loop control, when reaching the corresponding depressing force of displacement, that is, think to reach desired value, lock circuit.It in this way can be with
Ensure the continuity of production, improve system stability, ensure yield.
The pushing control valve group 2 may also include failure and open entrance 29, oil-return accumulator 210, high pressure accumulator device
211 and safety valve 212.
Failure open entrance 29 connect it is described push solenoid directional control valve 23 B mouths, oil-return accumulator 210 also with the pushing
The T mouths of solenoid directional control valve 23, the T mouths of the threeway proportional pressure-reducing valve 25 and the T mouths for pushing servo valve 20 are mutually connected
It is logical；High pressure accumulator device 211 may connect to the P mouths of threeway proportional pressure-reducing valve 25 and T mouthfuls, and safety valve 212 can be communicated in pushing
The rod chamber of hydraulic cylinder 3.
When encountering 1 failure of fuel feeding source device, no hydraulic oil provides, and pushing solenoid directional control valve 23 can be caused to be powered, can not be beaten
When opening the first pushing hydraulic lock 21 and the second pushing hydraulic lock 22, entrance 29 can be opened in failure and access high pressure manual all the way
Oil so as to open each hydraulic lock, completes emergency action, so as to protect equipment.
Fig. 5 is the structure diagram that the present invention one promotes control valve group.
Fig. 5 is please referred to, the promotion control valve group 4, which further includes, promotes 41 and of the promotion hydraulic lock of solenoid directional control valve 43, first
Second promotes hydraulic lock 42, and the B mouths for promoting solenoid directional control valve 43 are connected to the P mouths for promoting servo valve 40, described
The T mouths of solenoid directional control valve are connected to the T mouths for promoting servo valve；
First port of the first promotion hydraulic lock 41 is connected to the rod chamber of the lifting hydraulic cylinder 5, and described first
The second port for promoting hydraulic lock 41 is connected to the A mouths for promoting servo valve 40, and described second promotes the first of hydraulic lock 42
Port is connected to the rodless cavity for promoting servo valve 40, and the second port of the second promotion hydraulic lock 42 is connected to described carry
Rise the rod chamber of servo valve 40.
In one of which embodiment, the promotion control valve group 4 further includes the first promotion high pressure filter 44, second carries
Rise high pressure filter 45,46 and the 4th pressure sensor 47 of third pressure sensor；
Described first, which promotes high pressure filter 44, is set on the described first the first port for promoting hydraulic lock 41 and the promotion
Between the rod chamber of hydraulic cylinder 5, described second promotes high pressure filter 45 leads to set on the first of the described second promotion hydraulic lock 42
Between mouth and the rodless cavity of the lifting hydraulic cylinder 5；
The rod chamber that the third pressure sensor 46 is used to detect the lifting hydraulic cylinder 5 promotes high pressure with described first
Pressure between filter 44, the 4th pressure sensor 47 be used to detecting the rodless cavity of the lifting hydraulic cylinder 5 with it is described
Second promotes the pressure between high pressure filter 45.
The process of promotion can be regarded as：
It promotes solenoid directional control valve 43 to be powered, opens first and promote the promotion hydraulic lock 42 of hydraulic lock 41 and second, hydraulic oil leads to
It crosses promotion solenoid directional control valve 43 and enters promotion servo valve 40, pass through first and promote the promotion high-pressure filteration of high pressure filter 44 and second
Device 45 enters the rodless cavity of lifting hydraulic cylinder 5, is specifically as follows the rodless cavity of the left and right oil cylinder of the lower roll 92 of fan-shaped section.It is promoted
The cylinder body of hydraulic cylinder 5 is fixed, and motion bar drives lower roll 92 to move upwards under the action of hydraulic oil, lifting hydraulic cylinder 5
Rod chamber volume becomes smaller, extra boosted 40 oil return box of servo valve of hydraulic oil, completes lower roll enhancing action.Reach target location
Afterwards, it promotes servo valve 40 and goes back to middle position, promote 43 dead electricity of solenoid directional control valve electricity, first, which promotes hydraulic lock 41 and second, promotes hydraulic lock
42 locked circuits, keep Position of Hydraulic Cylinder.
92 back to zero position process of lower roll：It promotes solenoid directional control valve 43 to be powered, opens first and promote the promotion of hydraulic lock 41 and second
Hydraulic lock 42, hydraulic oil enter promotion servo valve 40 by promoting solenoid directional control valve 43, pass through first and promote high pressure filter 44
High pressure filter 45 is promoted into the rod chamber of lifting hydraulic cylinder 5 with second, and the lower roll 92 of fan-shaped section is left and right specially under weight
The rod chamber of two lifting hydraulic cylinders 5, cylinder body is fixed, and motion bar drives lower roll 92 downward under the action of hydraulic oil
Movement, the rodless cavity volume of lifting hydraulic cylinder 5 become smaller, extra boosted 40 oil return box of servo valve of hydraulic oil, complete lower roll 92 and return
Zeroing.It after reaching target location, promotes servo valve 40 and goes back to middle position, promote 43 dead electricity of solenoid directional control valve electricity, first promotes hydraulic pressure
41 and second promotion hydraulic lock 42 of lock locks circuit, keeps oil cylinder position.
In addition, the promotion control valve group 4 may also include the first safety valve 48, the second safety valve 49 and pressure difference relay
Device 410.
First safety valve 48 is connected to the rod chamber of lifting hydraulic cylinder 5, and the second safety valve 49 is connected to lifting hydraulic cylinder 5
Rodless cavity, pressure difference relay 410 are connected to the P mouths for promoting solenoid directional control valve 43.
Fig. 6 is the structure diagram of a control valve platform of the invention；
Fig. 6 is please referred to, in control valve platform, it can be respectively the entrance pushing control set on entrance to push control valve group 2
Valve group 201 can pass through two valve groups respectively with pushing control valve group 202, outlet and the upper roller of entrance set on the outlet of outlet
Control, meanwhile, two valve groups can respectively be controlled by two control units, and two units can be realized with Synchronization Control under weight
Fan-shaped section upper roller lifts simultaneously, wherein, control device 7 may include two control units.The pattern in the case where requiring entrance weight, outlet
When roll gap keeps pattern, being pressed for each unit can be set respectively, drafts and start to depress the time, to realize under different weight
Process modeling.
Fig. 7 is the structure diagram of a fuel feeding source device of the invention.
Fig. 7 is please referred to, the fuel feeding source device 1 includes liquid case 11, temperature sensor 14, heating unit 13, high pressure pump group
12nd, heat sink 15；Liquid case 11 therein can be specially fuel tank.
The temperature sensor 14, for detecting the temperature of liquid in the liquid case 11.
The heating unit 13, in the liquid case 11 fluid temperature be less than the first temperature value when to the liquid case 11
In liquid heated；First temperature value therein can be 25 DEG C.
The heat sink 15, in the liquid case 11 temperature be higher than second temperature value when in the liquid case 11
Liquid cools down；, wherein, the second temperature value is higher than first temperature value, and second temperature value therein can be 45
℃。
The high pressure pump group 12, in the liquid case 11 temperature higher than second temperature value and less than third temperature value when
Using the liquid in the liquid case 11, to the pushing control valve group 2 and the supply hydraulic pressure of control valve group 4 is promoted.
By heating unit 13, temperature sensor 14 and heat sink 15, the liquid temperature of supplied hydraulic pressure can be ensured
Degree is maintained between the first temperature value and second temperature value.
Fuel feeding source device 1 may also include power control cabinet 16, recursive filter 17, liquid level gauge 18, electromagnetic water valve 19, cycle pump group
110 and electromagnetic relief valve 111.
Wherein, heat sink 15 can be heat exchanger, in order to cool down using heat exchanger, electromagnetic water valve can be configured for it
19 and cycle pump group 110, cycle pump group 110 by liquid case 11 hydraulic oil extraction generate circulation path, electromagnetic water valve 19 can
For controlling the break-make of the circulation path, in cyclic process, cooling processing is carried out to it using other low-temperature receivers, meanwhile,
The filtering that recursive filter 17 carries out hydraulic oil can be also equipped in circulation path.
Liquid level gauge 18 can be used for the liquid level of liquid in detection liquid case 11.
Its operation principle can be understood as：
Start power source by long-range or machine, cycle pump group 110 starts, and system automatic decision temperature sensor 14 measures liquid
The temperature of liquid in case 11 when temperature sensor 14 detects that temperature is less than 25 DEG C, starts heating unit 13, heats liquid case 11
In hydraulic oil, when temperature sensor 14 detects that temperature is raised to 25 DEG C, high pressure pump group 12 starts, after 10 seconds, electromagnetism overflow
Valve 111 must be electric, so as to be provided out hydraulic oil, completes system and starts.When temperature sensor 14 detects that temperature is higher than 45 DEG C,
Electromagnetic water valve 19 must be electric, hydraulic oil is cooled down in heat sink 15, when temperature sensor 4 detects that temperature drops to 45 DEG C
When, high pressure pump group 2 starts, and after 10 seconds, electromagnetic relief valve 3 must be electric, so as to be provided out hydraulic oil, completes system and starts.
Control involved by the present embodiment can be realized by power control cabinet 16.
The fuel feeding source device 1 that the present embodiment is related to can have controlled interlocking (cooling) and warning function：
When temperature sensor 14 detects temperature less than 25 DEG C, heating unit 13 starts；Oil temperature reaches 25 DEG C, allows high pressure
Pump group 11 starts；Oil temperature reaches 35 DEG C, and heating unit 13 is closed；Oil temperature is less than 41 DEG C, and the electromagnet dead electricity of electromagnetic water valve 19 drops
Warm device 15 is stopped；Oil temperature is higher than 45 DEG C, and the electromagnet of electromagnetic water valve 19 obtains electric, and heat sink 15 is devoted oneself to work；Oil temperature
Higher than 55 DEG C, based on the detection of temperature sensor 14, it can drive and send out sound-light alarm, guiding user checks that cooling back installation is
No normal operation.
The fuel feeding source device 1 that the present embodiment is related to can also have alarm and the interlock of liquid level：
The height of 11 liquid level of liquid case is detected by liquid level gauge 18, performs corresponding interlock.Liquid level gauge 18 is defeated for analog quantity
Go out, and equipped with high and low, low three on-off model contacts.It is closed state during normal level.High liquid level, sound-light alarm,
May be to have water invasive system or should stop repairing；Low liquid level, sound-light alarm, high pressure pump group 12 cannot under non-working condition
Start, it should be immediately to fuel tank repairing；Low low liquid level, sound-light alarm automatically cut off all working Oil pump electrical machinery, and ensure in this liquid
Under position, recycling the motor of pump group 110 and high pressure pump group 12 cannot be again started up.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of hydraulic system controlled for fan-shaped section under slab continuous casting weight, which is characterized in that including：Fuel feeding source device,
It pushes control valve group, promote control valve group, lower pressure cylinder and lifting hydraulic cylinder；
The pushing control valve group, for the hydraulic pressure provided using the fuel feeding source device, by being carried to the lower pressure cylinder
For required hydraulic pressure, relative motion occurs between the motion bar and cylinder body of the control lower pressure cylinder, upper rod to be driven to push；
The promotion control valve group, for the hydraulic pressure provided using the power source, by being carried to the lifting hydraulic cylinder
For required hydraulic pressure, control and relative motion occurs between the motion bar and cylinder body of the lifting hydraulic cylinder, lower roll to be driven to be promoted；
The system is used to the fan-shaped section be driven to push, and lead to by the pushing of the upper roller and/or the promotion of the lower roll
The pushing of the fan-shaped section is crossed, squeezes the required position of strand.
2. system according to claim 1, which is characterized in that position needed for described refers to the solidified tail end of liquid core of the strand,
And 15 millimeters or more of reduced down in thickness volume under pressure can be generated to strand.
3. system according to claim 1, which is characterized in that detection device and control device are further included,
The detection device obtains the first relative displacement and/or the second relative displacement for detecting, and first relative displacement refers to
The relative displacement of the motion bar and cylinder body of the lower pressure cylinder, second relative displacement refer to the activity of the lifting hydraulic cylinder
The relative displacement of bar and cylinder body；
The control device, for according to first relative displacement, controlling the pushing control valve group to corresponding lower hydraulic fluid
Cylinder pressure provide hydraulic pressure and/or：According to second relative displacement, the promotion control valve group is controlled to corresponding promotion hydraulic pressure
Cylinder provides hydraulic pressure.
4. system according to claim 3, which is characterized in that the pushing control valve group includes pushing servo valve, described
It pushes servo valve and is respectively communicated to the fuel feeding source device and lower pressure cylinder；The control device is specifically used for according to described the
One relative displacement controls the unlatching for pushing servo valve, the degree closed and opened；
The promotion control valve group includes promoting servo valve, and the promotion servo valve is respectively communicated to the fuel feeding source device and institute
State lifting hydraulic cylinder；The control device is specifically used for, according to second relative displacement, controlling opening for the promotion servo valve
The degree for opening, closing and opening.
5. system according to claim 4, which is characterized in that the pushing control valve group further includes pushing electromagnetic switch
Valve, first push hydraulic lock, the second pushing hydraulic lock, return filter and threeway proportional pressure-reducing valve；
The P mouths for pushing solenoid directional control valve, the first port of the first pushing hydraulic lock and the fuel feeding source device are mutual
It is connected, the T mouths for pushing solenoid directional control valve, the T mouths of the threeway proportional pressure-reducing valve and the T for pushing servo valve
Mouth interconnects；
Second port of the first pushing hydraulic lock is connected to the P mouths for pushing servo valve, the B mouths for pushing servo valve
The described second the second port for pushing hydraulic lock is connected to, the first port of the second pushing hydraulic lock is connected to the pushing
The rod chamber of hydraulic cylinder；
The rodless cavity of the lower pressure cylinder connects the first port of the return filter, and the second of the return filter is logical
Mouth is connected to the A mouths of the threeway proportional pressure-reducing valve.
6. system according to claim 5, which is characterized in that the pushing control valve group further includes pushing high-pressure filteration
Device, first pressure sensor, second pressure sensor, it is described push high pressure filter and be set on described second and push hydraulic lock the
Between the rod chamber of one port and the lower pressure cylinder；
The first pressure sensor is used to detect between the rod chamber of the lower pressure cylinder and the pushing high pressure filter
Pressure, the second pressure sensor is used to detect between rodless cavity and the return filter of the lower pressure cylinder
Pressure.
7. system according to claim 4, which is characterized in that the promotion control valve group further includes promotion electromagnetic switch
Valve, first promote hydraulic lock and second and promote hydraulic lock, and the B mouths for promoting solenoid directional control valve are connected to the promotion servo valve
P mouths, the T mouths of the solenoid directional control valve are connected to the T mouths for promoting servo valve；
First port of the first promotion hydraulic lock is connected to the rod chamber of the lifting hydraulic cylinder, and described first promotes hydraulic pressure
Second port of lock is connected to the A mouths for promoting servo valve, and the described second the first port for promoting hydraulic lock is connected to described
The rodless cavity of servo valve is promoted, the second port of the second promotion hydraulic lock is connected to the rod chamber for promoting servo valve.
8. system according to claim 7, which is characterized in that the promotion control valve group further includes the first promotion height and presses through
Filter, second promote high pressure filter, third pressure sensor and the 4th pressure sensor；
Described first, which promotes high pressure filter, is set on the described first the first port for promoting hydraulic lock and the lifting hydraulic cylinder
Between rod chamber, described second, which promotes high pressure filter, is set on the described second the first port for promoting hydraulic lock and the promotion liquid
Between the rodless cavity of cylinder pressure；
The rod chamber that the third pressure sensor is used to detect the lifting hydraulic cylinder promotes high pressure filter with described first
Between pressure, the 4th pressure sensor is used to detecting the rodless cavity of the lifting hydraulic cylinder promotes high pressure with described second
Pressure between filter.
9. according to claim 4 to 8 any one of them system, which is characterized in that further include pushing servo amplifier, Yi Jiti
Servo amplifier is risen, the servo amplifier that pushes connects the control device and the control terminal for pushing servo valve respectively,
The servo amplifier that promoted connects the control device and the control terminal for promoting servo valve respectively.
10. according to claim 1 to 8 any one of them system, which is characterized in that the fuel feeding source device includes liquid case, temperature
Spend sensor, heating unit, high pressure pump group, heat sink；
The temperature sensor, for detecting the temperature of liquid in the liquid case；
The heating unit, in the liquid case fluid temperature be less than the first temperature value when to the liquid in the liquid case into
Row heating；
The heat sink, for being dropped when temperature is higher than second temperature value in the liquid case to the liquid in the liquid case
Temperature；Wherein, the second temperature value is higher than first temperature value；
The high pressure pump group, for when temperature is higher than the first temperature value and less than second temperature value in the liquid case using described
Liquid in liquid case to the pushing control valve group and promotes control valve group supply hydraulic pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810276856.XA CN108194447A (en) | 2018-03-30 | 2018-03-30 | The hydraulic system controlled for fan-shaped section under slab continuous casting weight |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276856.XA CN108194447A (en) | 2018-03-30 | 2018-03-30 | The hydraulic system controlled for fan-shaped section under slab continuous casting weight |
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| CN201810276856.XA Pending CN108194447A (en) | 2018-03-30 | 2018-03-30 | The hydraulic system controlled for fan-shaped section under slab continuous casting weight |
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