CN105757065A - Crystallizer taper on-line maintenance and hydraulic control system - Google Patents
Crystallizer taper on-line maintenance and hydraulic control system Download PDFInfo
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- CN105757065A CN105757065A CN201610184259.5A CN201610184259A CN105757065A CN 105757065 A CN105757065 A CN 105757065A CN 201610184259 A CN201610184259 A CN 201610184259A CN 105757065 A CN105757065 A CN 105757065A
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- 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
- F15B21/08—Servomotor systems incorporating electrically operated control means
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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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/057—Manufacturing or calibrating the moulds
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- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/765—Control of position or angle of the output member
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Manufacturing & Machinery (AREA)
Abstract
The invention provides a crystallizer taper on-line maintenance and hydraulic control system which comprises an electromagnetic reversing valve, a high-frequency response valve and a hydraulic cylinder, wherein a pressure oil hole P of the electromagnetic reversing valve is communicated with a main pressure pipeline; a main oil hole B of the electromagnetic reversing valve is communicated with the pressure oil hole P of the high-frequency response valve; a main oil hole A of the high-frequency response valve is connected with a piston cavity of the hydraulic cylinder; the main oil hole B of the high-frequency response valve is connected with a piston rod cavity of the hydraulic cylinder; an oil return hole T of the high-frequency response valve is communicated with a main oil return pipeline. By adopting the crystallizer taper on-line maintenance and hydraulic control system, crystallizer taper on-line position maintenance control required by provided taper signals can be precisely, reliably and automatically achieved accruing to a crystallizer taper set by a process; moreover when a crystallizer needs on-line width adjustment, on-line width adjustment and control can be achieved through the control system; meanwhile continuous long-time molten steel casting operation can be implemented through the control system even in an accident state, and severe safety production accidents such as molten steel leakage caused by variation of the crystallizer taper can be avoided.
Description
Technical field
The invention belongs to continuous casting steel machine technical field of hydraulic, be specifically related to a kind of conical degree of crystallizer and keep hydraulic control system online.
Background technology
The conical degree of crystallizer in continuous casting steel machine field keeps equipment generally by driven by servomotor ball-screw push rod, the narrow limit of crystallizer to be controlled both at home and abroad at present, the driving device structure constituted due to servomotor and ball-screw is complicated, it is big to take up room, and transmission link too much causes excesssive gap, owing to the effect of casting blank bulging power causes that the tapering of crystallizer changes in long molten steel casting process, thus causing the industrial accident such as slab quality problem and molten steel leakage.
Summary of the invention
It is an object of the invention to overcome the above-mentioned problems in the prior art, make conical degree of crystallizer realize adjusting in real time, so that it is guaranteed that the mould taper control of crystallizer is in the scope that error allows.
For this, the invention provides a kind of conical degree of crystallizer and keep hydraulic control system online, including solenoid directional control valve, high frequency sound valve, hydraulic cylinder, the pressure oil port P of described solenoid directional control valve and principal pressure pipeline connection, the main hydraulic fluid port B of solenoid directional control valve connects with the pressure oil port P of high frequency sound valve, the main hydraulic fluid port A of described high frequency sound valve is connected with the plunger shaft of hydraulic cylinder, and the main hydraulic fluid port B of high frequency sound valve is connected with the rod end chamber of hydraulic cylinder, and the oil return inlet T of high frequency sound valve is connected with main return line；
Being provided with displacement transducer on described hydraulic cylinder, this displacement transducer connects electrical control cabinet by cable, and the built-in integrated form amplifier of described high frequency sound valve and solenoid directional control valve are connected with electrical control cabinet each through cable.
Being provided with the first check valve between oil return inlet T and the main return line of described high frequency sound valve, the main hydraulic fluid port A of this first check valve is connected with the oil return inlet T of the oil return inlet T of solenoid directional control valve, high frequency sound valve respectively, and the first check valve main hydraulic fluid port B connects with main return line.
It is provided with the first hydraulic control one-way valve between main hydraulic fluid port A and the plunger shaft of hydraulic cylinder of described high frequency sound valve, the control port X of this first hydraulic control one-way valve is connected with the main hydraulic fluid port B of solenoid directional control valve, and the drain tap Y of the first hydraulic control one-way valve and the main hydraulic fluid port A of the first check valve connects；
It is provided with the second hydraulic control one-way valve between main hydraulic fluid port B and the rod end chamber of hydraulic cylinder of described high frequency sound valve, the control port X of this second hydraulic control one-way valve is connected with the main hydraulic fluid port B of solenoid directional control valve, and the drain tap Y of the second hydraulic control one-way valve and the main hydraulic fluid port A of the first check valve connects.
Also including sequence valve, the pressure oil port P of described sequence valve is connected with the rod end chamber of hydraulic cylinder, and its oil return inlet T is connected with the plunger shaft of hydraulic cylinder, and the spring side of this sequence valve connects blow vent CA.
Also including the second check valve, the main hydraulic fluid port B of described second check valve is connected with the pressure oil port P of the rod end chamber of hydraulic cylinder, sequence valve respectively, and the main hydraulic fluid port A of the second check valve and the main hydraulic fluid port A of the first check valve connects.
Also including overflow valve, the pressure oil port P of described overflow valve is connected with the plunger shaft of hydraulic cylinder, and its oil return inlet T is connected with the main hydraulic fluid port A of the first check valve and the main hydraulic fluid port A of the second check valve.
The plunger shaft of described hydraulic cylinder is connected to the first pressure transducer, and the rod end chamber of described hydraulic cylinder is connected to the second pressure transducer, and the first pressure transducer and the second pressure transducer are connected with electrical control cabinet each through cable.
It is provided with filter between pressure oil port P and the principal pressure pipeline of described solenoid directional control valve.
It is provided with ball valve between described principal pressure pipeline and main return line.
The invention has the beneficial effects as follows: this conical degree of crystallizer provided by the invention keeps hydraulic control system online, not only according to the conical degree of crystallizer of technique initialization, can in high precision, reliably, automatically realize given conical degree of crystallizer required by tapering signal and keep controlling at line position；And when crystallizer needs online width adjusting, kept the control of the position-force control system of hydraulic control system and electrical control cabinet composition online by this conical degree of crystallizer, online heat can be realized and adjust width control；Remain to carry out long molten steel by this control system in the state of accident continue to pour into a mould work, without occurring conical degree of crystallizer change to cause the major industrial accidents such as molten steel leakage simultaneously.
It is described in further details below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is principles of the invention schematic diagram.
In figure: 1, filter；201, the first check valve；202, the second check valve；3, ball valve；4, solenoid directional control valve；5, high frequency sound valve；601, the first hydraulic control one-way valve 601；602, the second hydraulic control one-way valve；7, overflow valve；8, sequence valve；901, the first pressure transducer；902, the second pressure transducer；10, hydraulic cylinder；11, displacement transducer；12, electrical control cabinet；PO, principal pressure pipeline；TO, main return line.
Detailed description of the invention
Embodiment 1:
Present embodiments provide a kind of conical degree of crystallizer and keep hydraulic control system online, including solenoid directional control valve 4, high frequency sound valve 5, hydraulic cylinder 10, the pressure oil port P of described solenoid directional control valve 4 connects with principal pressure pipeline PO, the main hydraulic fluid port B of solenoid directional control valve 4 connects with the pressure oil port P of high frequency sound valve 5, the main hydraulic fluid port A of described high frequency sound valve 5 is connected with the plunger shaft of hydraulic cylinder 10, the main hydraulic fluid port B of high frequency sound valve 5 is connected with the rod end chamber of hydraulic cylinder 10, and the oil return inlet T of high frequency sound valve 5 is connected with main return line TO；
Being provided with displacement transducer 11 on described hydraulic cylinder 10, this displacement transducer 11 connects electrical control cabinet 12 by cable, and the built-in integrated form amplifier of described high frequency sound valve 5 and solenoid directional control valve 4 are connected with electrical control cabinet 12 each through cable.
The principle of the invention:
Electrical control cabinet 12 is provided power supply V by outside; solenoid directional control valve 4 is for shutting down or the cut-out of high pressure fuel source under accident condition; displacement transducer 11 detects for the position of hydraulic cylinder 10; high frequency sound valve 5 automatically controls for the position closed loop of hydraulic cylinder 10; hydraulic cylinder 10 is for controlling the position of mould at narrow copper coin, the i.e. mould taper control of crystallizer.
When normal operation, the electric magnet a energising of solenoid directional control valve 4, system is according to the crystallizer position tapering set, electrical control cabinet 12 is by detecting the positional value of the displacement transducer 11 being arranged on hydraulic cylinder 10, the real-time automatic control high frequency of electrical control cabinet 12 rings valve 5, the high precision position realizing conical degree of crystallizer controls, thus ensureing the conical degree of crystallizer of technological requirement.
Concrete regulative mode is the upper and lower narrow limit target setting width value to crystallizer, ringing, by electric control unit 12 automatic control high frequency, the position loop system that the upper and lower narrow limit of crystallizer is adjusted that valve 5 is constituted with the hydraulic cylinder 10 with displacement transducer 11, crystallizer width value is adjusted target width value by electric control unit 12 automatically.So, the width value according to the width position set in producing and requirement, it is possible to achieve conical degree of crystallizer keeps function online.Additionally, due to the position-force control system adopting conical degree of crystallizer to keep hydraulic means to constitute online, automatically the width value of crystallizer can be adjusted target width value, thus make conticaster change crystallizer width and become very easy, significantly reduce the adjustment time of continuous casting production scene and the labor intensity of workman, improve operating rate.
Embodiment 2:
On the basis of embodiment 1, present embodiments provide a kind of conical degree of crystallizer and keep hydraulic control system online, it is provided with the first check valve 201 between oil return inlet T and the main return line TO of described high frequency sound valve 5, the main hydraulic fluid port A of this first check valve 201 is connected with the oil return inlet T of the oil return inlet T of solenoid directional control valve 4, high frequency sound valve 5 respectively, and the first check valve 201 main hydraulic fluid port B connects with main return line TO.
First check valve 201, for preventing the fluid of main return line TO from entering in this control system, causes the position of hydraulic cylinder 10 to change, and the unlatching pressure of 2bar can improve the performance of control high frequency sound valve 5 simultaneously.
Embodiment 3:
On the basis of embodiment 2, present embodiments provide a kind of conical degree of crystallizer and keep hydraulic control system online, it is provided with the first hydraulic control one-way valve 601 between main hydraulic fluid port A and the plunger shaft of hydraulic cylinder 10 of described high frequency sound valve 5, the control port X of this first hydraulic control one-way valve 601 is connected with the main hydraulic fluid port B of solenoid directional control valve 4, and the drain tap Y of the first hydraulic control one-way valve 601 and main hydraulic fluid port A of the first check valve 201 connects；
It is provided with the second hydraulic control one-way valve 602 between main hydraulic fluid port B and the rod end chamber of hydraulic cylinder 10 of described high frequency sound valve 5, the control port X of this second hydraulic control one-way valve 602 is connected with the main hydraulic fluid port B of solenoid directional control valve 4, and the drain tap Y of the second hydraulic control one-way valve 602 and main hydraulic fluid port A of the first check valve 201 connects.
In the present embodiment; first hydraulic control one-way valve 601 is for shutting down or the break-make control of the plunger shaft pipeline of hydraulic cylinder 10 under accident condition; second hydraulic control one-way valve 602 is for shutting down or the break-make control of the rod end chamber pipeline of hydraulic cylinder 10 under accident condition; control the first hydraulic control one-way valve 601 by solenoid directional control valve 4 and the second hydraulic control one-way valve 602 opens and closes, the action while of the first hydraulic control one-way valve 601 and the second hydraulic control one-way valve 602.
When normal operation, the electric magnet a energising of solenoid directional control valve 4, make the first hydraulic control one-way valve 601 and the second hydraulic control one-way valve 602 open；System is according to the crystallizer position tapering set, electrical control cabinet 12 is by detecting the positional value of the displacement transducer 11 being arranged on hydraulic cylinder 10, the real-time automatic control high frequency of electrical control cabinet 12 rings valve 5, the high precision position realizing conical degree of crystallizer controls, thus ensureing the conical degree of crystallizer of technological requirement.
Embodiment 4:
On the basis of embodiment 1, present embodiments provide a kind of conical degree of crystallizer and keep hydraulic control system online, also include sequence valve 8, the pressure oil port P of described sequence valve 8 is connected with the rod end chamber of hydraulic cylinder 10, its oil return inlet T is connected with the plunger shaft of hydraulic cylinder 10, and the spring side of this sequence valve 8 connects blow vent CA.
Sequence valve 8 is for the overpressure protection of hydraulic cylinder 10 rod end chamber, it is prevented that owing to hypertonia causes the damage of hydraulic cylinder 10；In the state of accident, for adjusting the change in location owing to the leakage of hydraulic cylinder 10 causes, make under accident condition, this system energy reliability service simultaneously.Owing to the spring side of sequence valve 8 connects blow vent CA, thus the pressure set points of this sequence valve 8 only with the pretightning force of spring about and unrelated with the pressure of secondary pipes.
Embodiment 5:
On the basis of embodiment 4, present embodiments provide a kind of conical degree of crystallizer and keep hydraulic control system online, also include the second check valve 202, the main hydraulic fluid port B of described second check valve 202 is connected with the pressure oil port P of the rod end chamber of hydraulic cylinder 10, sequence valve 8 respectively, and the main hydraulic fluid port A of the second check valve 202 and main hydraulic fluid port A of the first check valve 201 connects.
Second check valve 202 is for the repairing effect of the rod end chamber of hydraulic cylinder 10, it is prevented that the rod end chamber of hydraulic cylinder 10 produces emptying phenomenon, causes bad seals.
Embodiment 6:
On the basis of embodiment 5, present embodiments provide a kind of conical degree of crystallizer and keep hydraulic control system online, also include overflow valve 7, the pressure oil port P of described overflow valve 7 is connected with the plunger shaft of hydraulic cylinder 10, and its oil return inlet T is connected with the main hydraulic fluid port A of the first check valve 201 and the main hydraulic fluid port A of the second check valve 202.
Overflow valve 7 is protected for the pressure of hydraulic cylinder 10 plunger shaft, it is prevented that owing to hypertonia causes the damage of hydraulic cylinder 10.
Embodiment 7:
On the basis of embodiment 1, present embodiments provide a kind of conical degree of crystallizer and keep hydraulic control system online, the plunger shaft of described hydraulic cylinder 10 is connected to the first pressure transducer 901, the rod end chamber of described hydraulic cylinder 10 is connected to the second pressure transducer 902, and the first pressure transducer 901 and the second pressure transducer 902 are connected with electrical control cabinet 12 each through cable.
First pressure transducer 901 is for detecting the force value detection of hydraulic cylinder 10 plunger shaft, and the second pressure transducer 902 is for the force value detection of the rod end chamber of hydraulic cylinder 10.
Embodiment 8:
On the basis of embodiment 1-7 any embodiment, present embodiments provide a kind of conical degree of crystallizer and keep hydraulic control system online, between the pressure oil port P and principal pressure pipeline PO of described solenoid directional control valve 4, be provided with filter 1.
Filter 1 is for the filtration of fluid, owing to crystallizer it is frequently necessary to maintenance of rolling off the production line, the dismounting of pipeline is easily caused foul and enters in hydraulic system pipeline, arranging filter 1 prevents rear hydraulic components and parts from causing jam phenomenon occur owing to dirt enters pipeline, especially the oil cleanliness that high frequency sound valve 5 requires is higher, it is prevented that hydraulic component fault occur.
Embodiment 9:
On the basis of embodiment 8, present embodiments provide a kind of conical degree of crystallizer as shown in Figure 1 and keep hydraulic control system online, between described principal pressure pipeline PO and main return line TO, be provided with ball valve 3.
Ball valve 3 is used for flushing and the pressure release of pipeline, to the crystallizer used of newly reaching the standard grade, opens ball valve 3 and pipeline is rinsed, it is prevented that dirt enters in the pipeline of rear portion；Meanwhile, during detaching pipelines, open ball valve 3 can residual pressure in discharge conduit, make the dismounting of pipeline become simple and safety；It is closed when producing when ball valve 3 is flat.
In Fig. 1, P represents that pressure oil port, T represent that oil return opening, A represent main hydraulic fluid port, and B represents main hydraulic fluid port, and X represents that control port, Y represent that drain tap, CA represent that blow vent, S represent displacement signal, and I represents current signal.
The present invention is in the state of accident, such as hydraulic oil source, hydraulic component or electrical system break down, solenoid directional control valve 4, high frequency sound valve 5 power-off, first hydraulic control one-way valve 601 and the second hydraulic control one-way valve 602 are reliably automatically switched off, and the position of hydraulic cylinder 10 is reliably maintained at initial, set position.Along with being performed continuously over of continuous casting steel machine operation, extended state is born under the effect of the casting blank bulging power that the hydraulic cylinder 10 on crystallizer top bears at crystallizer bottom foot roller, owing to the cavity volume of the rod end chamber of upper hydraulic cylinder 10 is in the closed state of the second hydraulic control one-way valve 602, when force value reaches the setting value of sequence valve 8, sequence valve 8 action, the fluid of hydraulic cylinder 10 rod end chamber flows back to plunger shaft until sequence valve 8 is re-closing off, thus ensureing that the pressure of the rod end chamber of hydraulic cylinder 10 is less than setting value, it is to avoid damage the sealing member of hydraulic cylinder 10.
The electrical control cabinet that the present embodiment does not describe in detail belongs to prior art, it does not have in detail the parts of narration, structure and method belong to the well-known components of the industry or common structure and known general knowledge, do not describe one by one here.
Exemplified as above is only illustration to the present invention, is not intended that the restriction to protection scope of the present invention, every belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (9)
1. a conical degree of crystallizer keeps hydraulic control system online, it is characterized in that: include solenoid directional control valve (4), high frequency sound valve (5), hydraulic cylinder (10), the pressure oil port P of described solenoid directional control valve (4) connects with principal pressure pipeline (PO), the main hydraulic fluid port B of solenoid directional control valve (4) connects with the pressure oil port P of high frequency sound valve (5), the main hydraulic fluid port A of described high frequency sound valve (5) is connected with the plunger shaft of hydraulic cylinder (10), the main hydraulic fluid port B of high frequency sound valve (5) is connected with the rod end chamber of hydraulic cylinder (10), the oil return inlet T of high frequency sound valve (5) is connected with main return line (TO)；
Described hydraulic cylinder (10) is provided with displacement transducer (11), this displacement transducer (11) connects electrical control cabinet (12) by cable, and built-in integrated form amplifier and the solenoid directional control valve (4) of described high frequency sound valve (5) are connected with electrical control cabinet (12) each through cable.
2. a kind of conical degree of crystallizer according to claim 1 keeps hydraulic control system online, it is characterized in that: between oil return inlet T and the main return line (TO) of described high frequency sound valve (5), be provided with the first check valve (201), the main hydraulic fluid port A of this first check valve (201) is connected with the oil return inlet T of the oil return inlet T of solenoid directional control valve (4), high frequency sound valve (5) respectively, and the first check valve (201) main hydraulic fluid port B connects with main return line (TO).
3. a kind of conical degree of crystallizer according to claim 2 keeps hydraulic control system online, it is characterized in that: between main hydraulic fluid port A and the plunger shaft of hydraulic cylinder (10) of described high frequency sound valve (5), be provided with the first hydraulic control one-way valve (601), the control port X of this first hydraulic control one-way valve (601) is connected with the main hydraulic fluid port B of solenoid directional control valve (4), and the drain tap Y of the first hydraulic control one-way valve (601) and the main hydraulic fluid port A of the first check valve (201) connects；
It is provided with the second hydraulic control one-way valve (602) between main hydraulic fluid port B and the rod end chamber of hydraulic cylinder (10) of described high frequency sound valve (5), the control port X of this second hydraulic control one-way valve (602) is connected with the main hydraulic fluid port B of solenoid directional control valve (4), and the drain tap Y of the second hydraulic control one-way valve (602) and the main hydraulic fluid port A of the first check valve (201) connects.
4. a kind of conical degree of crystallizer according to claim 2 keeps hydraulic control system online, it is characterized in that: also include sequence valve (8), the pressure oil port P of described sequence valve (8) is connected with the rod end chamber of hydraulic cylinder (10), its oil return inlet T is connected with the plunger shaft of hydraulic cylinder (10), and the spring side of this sequence valve (8) connects blow vent CA.
5. a kind of conical degree of crystallizer according to claim 4 keeps hydraulic control system online, it is characterized in that: also include the second check valve (202), the main hydraulic fluid port B of described second check valve (202) is connected with the pressure oil port P of the rod end chamber of hydraulic cylinder (10), sequence valve (8) respectively, and the main hydraulic fluid port A of the second check valve (202) and the main hydraulic fluid port A of the first check valve (201) connects.
6. a kind of conical degree of crystallizer according to claim 5 keeps hydraulic control system online, it is characterized in that: also include overflow valve (7), the pressure oil port P of described overflow valve (7) is connected with the plunger shaft of hydraulic cylinder (10), and its oil return inlet T is connected with the main hydraulic fluid port A of the first check valve (201) and the main hydraulic fluid port A of the second check valve (202).
7. a kind of conical degree of crystallizer according to claim 1 keeps hydraulic control system online, it is characterized in that: the plunger shaft of described hydraulic cylinder (10) is connected to the first pressure transducer (901), the rod end chamber of described hydraulic cylinder (10) is connected to the second pressure transducer (902), the first pressure transducer (901) and the second pressure transducer (902) and is connected with electrical control cabinet (12) each through cable.
8. a kind of conical degree of crystallizer according to any one of claim 1-7 keeps hydraulic control system online, it is characterised in that: it is provided with filter (1) between pressure oil port P and the principal pressure pipeline (PO) of described solenoid directional control valve (4).
9. a kind of conical degree of crystallizer described in any one keeps hydraulic control system online according to Claim 8, it is characterised in that: it is provided with ball valve (3) between described principal pressure pipeline (PO) and main return line (TO).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184259.5A CN105757065B (en) | 2016-03-29 | 2016-03-29 | A kind of conical degree of crystallizer keeps hydraulic control system online |
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| CN201610184259.5A CN105757065B (en) | 2016-03-29 | 2016-03-29 | A kind of conical degree of crystallizer keeps hydraulic control system online |
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| CN105757065A true CN105757065A (en) | 2016-07-13 |
| CN105757065B CN105757065B (en) | 2017-12-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113124009A (en) * | 2021-04-30 | 2021-07-16 | 中国重型机械研究院股份公司 | Load port flow pulse independent control digital hydraulic servo system and control method |
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| US20150204359A1 (en) * | 2014-01-22 | 2015-07-23 | Sumitomo Heavy Industries, Ltd. | Construction machine |
| CN104832486A (en) * | 2015-05-14 | 2015-08-12 | 中国重型机械研究院股份公司 | Soft reduction hydraulic control device and soft reduction hydraulic control method for square (round) billet caster |
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| CN201696385U (en) * | 2009-11-20 | 2011-01-05 | Abb技术股份有限公司 | Control valve device |
| CN203470892U (en) * | 2013-09-14 | 2014-03-12 | 中国重型机械研究院股份公司 | Stopper rod hydraulic control device |
| US20150204359A1 (en) * | 2014-01-22 | 2015-07-23 | Sumitomo Heavy Industries, Ltd. | Construction machine |
| CN203756630U (en) * | 2014-02-26 | 2014-08-06 | 中国重型机械研究院股份公司 | Novel sliding nozzle hydraulic control system |
| CN104832486A (en) * | 2015-05-14 | 2015-08-12 | 中国重型机械研究院股份公司 | Soft reduction hydraulic control device and soft reduction hydraulic control method for square (round) billet caster |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113124009A (en) * | 2021-04-30 | 2021-07-16 | 中国重型机械研究院股份公司 | Load port flow pulse independent control digital hydraulic servo system and control method |
| CN113124009B (en) * | 2021-04-30 | 2022-02-22 | 中国重型机械研究院股份公司 | Load port flow pulse independent control digital hydraulic servo system and control method |
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| CN105757065B (en) | 2017-12-12 |
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