CN104454706A - Hydraulic control system for semi-continuous casting speed - Google Patents
Hydraulic control system for semi-continuous casting speed Download PDFInfo
- Publication number
- CN104454706A CN104454706A CN201410744998.6A CN201410744998A CN104454706A CN 104454706 A CN104454706 A CN 104454706A CN 201410744998 A CN201410744998 A CN 201410744998A CN 104454706 A CN104454706 A CN 104454706A
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- China
- Prior art keywords
- oil
- control system
- semi
- continuous casting
- flow
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
-
- 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
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
- F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
-
- 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
- F15B13/16—Special measures for feedback, e.g. by a follow-up device
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/255—Flow control functions
-
- 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
-
- 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/61—Secondary circuits
- F15B2211/613—Feeding circuits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic control system for semi-continuous casting speed. The hydraulic control system comprises a hydraulic cylinder (1), an oil pump (2), a motor (3), an oil tank (4), a flow meter (5) and a flow controller (6). The motor (3) drives the oil pump (2) to work, and the oil tank (4) is communicated with an oil inlet of the oil pump (2). The flow meter (5) is communicated with an oil outlet of the hydraulic cylinder (1). The flow controller (6) is communicated with an oil outlet of the flow meter (5) and is capable of feeding back to the flow meter (5). The hydraulic control system has the advantages that by the aid of the flow meter and the flow controller as well as the feedback effect of the flow meter to the flow controller, real-time adjustment of hydraulic oil flow is achieved, so that the flow can be controlled accurately, manual intervention is not needed, and automatic control is achieved; the control system is high in reliability and low in failure rate.
Description
Technical field
The present invention relates to industrial production technology field, particularly relate to a kind of semi-continuous casting speed hydraulic control system.
Background technique
Casting is one of fundamental technology of modern mechanical manufacturing industry.Casting is as a kind of metal fever processing technology, progressively ripe in China's development.Semicontinuous vertical casting is the main forging type of the billet (rod) of cast aluminium alloy large gauge slab ingot and major diameter scope.To be exactly application material flowing deformation principle be cast as the slab ingot of certain size, billet or hollow cast ingot by alloy melt by crystallizer, image taking head with semicontinuous casting machine, for hot rolling or forging and stamping or extruding production provide the production equipment special of blank.Hydraulic casting machine is the good class casting machine of reliability.
In casting process, the control of casting speed is extremely important, usually determine the quality of foundry goods, in the process of casting, need to control the speed of casting at any time, therefore speed control system needs the pressure bearing larger intensity, in the prior art, need to make casting machine realize the operation of rising or declining by artificial operation, the effect accurately controlled cannot be reached, only can rely on artificial micro-judgment, the accurate control to casting speed cannot be realized, effect is unsatisfactory, and the difficult quality of product is protected.
Therefore, for a person skilled in the art, how designing a kind of system that accurately can realize controlling casting machine speed, do not need the lifting of manual control casting machine, is those skilled in the art's technical issues that need to address.
Summary of the invention
The object of this invention is to provide a kind of semi-continuous casting speed hydraulic control system, this system can realize automatically controlling the speed of casting machine, reaches the effect accurately controlling casting machine speed.
For solving the problems of the technologies described above, the invention provides a kind of semi-continuous casting speed hydraulic control system, comprise oil hydraulic cylinder, oil pump, the motor of the described operation of oil pump of drive, the fuel tank that is connected with the filler opening of described oil pump, it also comprises:
The flowmeter be connected with the oil outlet of described oil hydraulic cylinder;
Be communicated in the oil outlet of described flowmeter, can hydraulic control oil flow the flow control device of feedback can be made described flowmeter.
Preferably, also comprise and being arranged between described flow control device and described fuel tank, and for the stopper of oil circuit control break-make.
Preferably, described flow counts screw rod flowmeter, mass flowmenter or volumetric gear flow meter.
Preferably, described flow control device is based on stepper motor Flow valve, describedly can feed back described screw rod flowmeter based on stepper motor Flow valve, and by the size of the hydraulic fluid flow rate in PLC program control loop.
Preferably, also comprise and to be connected with described oil pump and the selector valve of described oil hydraulic cylinder rise and fall can be controlled.
Preferably, also comprise in parallel with described selector valve, the oil feeding device be connected with described oil pump oil outlet; One end and described selector valve are parallel to the oil outlet of described oil pump, the relief valve that the other end is connected with described fuel tank.
Preferably, described selector valve is solenoid directional control valve.
Preferably, two described oil pumps are driven to provide power for whole system by described motor.
Preferably, the filter be arranged at respectively between described oil hydraulic cylinder and described flowmeter, between described relief valve and described fuel tank is also comprised.
Preferably, the pressure gauge be arranged between described selector valve and described oil pump on loop is also comprised.
Semi-continuous casting speed hydraulic control system provided by the present invention, comprise oil hydraulic cylinder, oil pump, the motor of drive operation of oil pump, the fuel tank that is connected with the filler opening of oil pump, it also comprises: the flowmeter be connected with the oil outlet of oil hydraulic cylinder; Be communicated in the oil outlet of flowmeter and flow meter makes the flow control device of feedback; To be connected with oil pump and can the selector valve of hydraulic control cylinder rise and fall.
When needs are cast, first by oil pump, hydraulic oil in fuel tank is injected in oil hydraulic cylinder, makes oil hydraulic cylinder be in higher position, then close the loop of oil pump and oil hydraulic cylinder.Make hydraulic oil in oil hydraulic cylinder successively by flowmeter and flow control device again, reached the effect of hydraulic control cylinder rate of descent by the feedback of flowmeter to flow control device, achieve the closed-loop feedback of hydraulic pipe line.
The present invention is by arranging flowmeter and flow control device, and the effect of adjustment hydraulic fluid flow rate is in real time reached by the feedback effect of flowmeter to flow control device, can accurate flow control, realize oil hydraulic cylinder steadily to decline, need not artificial intervention be carried out, reach the object realizing automatically controlling.And the reliability of this control system is high, and rate of fault is lower.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the pipeline schematic diagram of a kind of concrete mode of execution of semi-continuous casting speed hydraulic control system provided by the present invention.
Wherein:
Oil hydraulic cylinder 1, oil pump 2, motor 3, fuel tank 4, flowmeter 5, flow control device 6, selector valve 7, oil feeding device 8, relief valve 9, pressure gauge 10, stopper 11, filter 12.
Embodiment
The object of this invention is to provide a kind of semi-continuous casting speed hydraulic control system, this system accurately can control the casting speed of casting machine, does not need artificially to intervene it, by closed-loop feedback, realizes automatic operation.
In order to make those skilled in the art understand semi-continuous casting speed hydraulic control system provided by the present invention better, below in conjunction with accompanying drawing and concrete mode of execution, technological scheme provided by the present invention is described in detail.
As shown in Figure 1, be the pipeline distribution map of a kind of concrete mode of execution of semi-continuous casting speed hydraulic control system provided by the present invention.As shown in the figure, in the present embodiment, comprise oil hydraulic cylinder 1, oil pump 2, motor 3, fuel tank 4, mainly also comprise the flowmeter 5 be connected with the oil outlet of oil hydraulic cylinder 1, cooperatively, also comprise the flow control device 6 arranged that to match with this flowmeter 5.Flow control device 6 can make feedback by flow meter 5, is adjusted by the flow of hydraulic pressure reading to the hydraulic oil flowing through flow control device 6 in induction flowmeter 5, can reach the object controlled in real time like this.When flow is larger, flow control device 6 reduces oil circuit, and flow is reduced; When flow is less, flow control device 6 can increase oil circuit again, and flow is increased gradually.
Particularly, the flowmeter 5 arranged in the present embodiment is screw rod flowmeter, screw rod flowmeter display effect is stable and durable, cost performance is higher, be a kind of mode of execution preferably, flow control device 6 is specially based on stepper motor Flow valve, and this Flow valve can by the size of the hydraulic fluid flow rate in PLC program control loop, after production setup parameter and aluminum alloy casting liquid level feed back to PLC, PLC controls flow.It should be noted that; the screw rod flowmeter adopted in present embodiment is a kind of preferred scheme with based on stepper motor Flow valve; also can make improvements; these improvement also drop within invention which is intended to be protected, and such as flowmeter 5 adopts volumetric gear flow meter or the higher mass flowmenter of precision.
Further, also comprise stopper 11 in present embodiment, stopper 11 is installed on the loop between flow control device 6 and fuel tank 4, for the break-make of oil circuit control.Before operational outfit, need first to open this stopper.Particularly, stopper 11 is specially manually operated valve in the present embodiment, and if there is fortuitous event, such as electric control device lost efficacy, and can utilize this device emergent stopping, prevent the appearance of fortuitous event.
Further, above-mentioned semi-continuous casting speed hydraulic control system also includes selector valve 7, selector valve 7 is for conveying liquid force feed in oil hydraulic cylinder 1, oil hydraulic cylinder 1 is made to increase, before starting casting, need oil hydraulic cylinder 1 to move to the highest position, then by flowmeter 5 and the oil extraction of hydraulic control device 6 earth-return, make oil hydraulic cylinder 1 start to decline, cast.Selector valve 7 is exactly injection liquid force feed in the forward direction oil hydraulic cylinder 1 that casting really starts.Selector valve 7 also can control oil hydraulic cylinder 1 declines, and the path changing selector valve 7 inside makes the hydraulic oil in oil hydraulic cylinder 1 be discharged by selector valve 7, and then oil hydraulic cylinder 1 is declined.But because the mode that this hydraulic control cylinder 1 declines is inaccurate, cannot meet the condition required by casting, therefore not adopt, selector valve 7 just can realize simple oil-feed and fuel-displaced operation, cannot accurately control.Particularly, the selector valve 7 in present embodiment is solenoid directional control valve, need not control manually, enhance automation integrated result.
Present embodiment also comprises oil feeding device 8, this oil feeding device 8 is in parallel with selector valve 7, one end is connected to oil pump 2, the other end is connected to oil hydraulic cylinder 1, directly to fuel feeding in oil hydraulic cylinder 1, this oil feeding device 8 is identical with selector valve 7 role, also be injection liquid force feed in oil hydraulic cylinder 1, but difference is, two oil supplying devices are set and can fill hydraulic oil by oil hydraulic cylinder 1 fast, improve utilization efficiency, and the hydraulic fluid flow rate that this device passes through is larger, when needs fill fast, selector valve 7 and oil feeding device 8 are opened simultaneously, and when not needing king-sized flow, only need to open selector valve 7, be convenient to the flow of more accurately hydraulic control oil.Set-up mode adopted in the present embodiment can make corresponding improvement according to concrete service condition, these improvement are also encompassed in invention which is intended to be protected.
Be connected a relief valve 9 at selector valve 7 with the oil outlet of oil pump 2, the other end of relief valve 9 is connected with fuel tank 4.Install relief valve 9 and avoid the excessive damage causing oil pump 2 of the pressure of system, when the hydraulic pressure of hydraulic system exceedes setting pressure, hydraulic oil is fed directly in fuel tank 4 by relief valve 9.
Present embodiment is whole system fuel feeding by Double-linkage, and namely a motor drives two oil pumps 2 to work simultaneously, and fuel delivery is larger, improves fuel feeding efficiency.
Further, be also provided with filter 12 on this system, be arranged on the loop between oil hydraulic cylinder 1 and flowmeter 5.By arranging filter 12, filtered fluid force feed, makes cleanliness of hydraulic oil, ensures in the precision by detecting during flowmeter 5.Another filter 12 is installed on the loop between relief valve 9 and fuel tank 4, before entering fuel tank 4, first to hydraulic oil filtering, ensures the clean of fuel tank internal.
Be arranged on the pressure gauge 10 between selector valve 7 and oil pump 2 on loop, convenient operation personnel understand the pressure condition of internal system, to operate accordingly in time.
When making semi-continuous casting speed hydraulic control system, first open selector valve 7 and oil feeding device 8, drive two oil pumps, 4 pairs of oil hydraulic cylinder 1 fuel feeding by motor 3, when oil hydraulic cylinder 1 rises to certain height, oil pump 4 stops, and closes selector valve 7 and oil feeding device 8.Make hydraulic oil successively by screw rod flowmeter and based on stepper motor Flow valve, the flow of accurate hydraulic control oil, makes the decline of oil hydraulic cylinder 1, starts casting, and until has cast.By screw rod flowmeter and the interaction based on stepper motor Flow valve, realize the rate of descent of automatic hydraulic control cylinder 1, need not artificially handle, improve the efficiency of operation.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein, can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a semi-continuous casting speed hydraulic control system, comprise oil hydraulic cylinder (1), oil pump (2), the motor (3) driving described oil pump (2) to work, the fuel tank (4) that is connected with the filler opening of described oil pump (2), it is characterized in that, also comprise:
The flowmeter (5) be connected with the oil outlet of described oil hydraulic cylinder (1);
Be communicated in the oil outlet of described flowmeter (5), can hydraulic control oil flow the flow control device (6) of feedback can be made described flowmeter (5).
2. semi-continuous casting speed hydraulic control system as claimed in claim 1, it is characterized in that, also comprise and being arranged between described flow control device (6) and described fuel tank (4), and for the stopper (11) of oil circuit control break-make.
3. semi-continuous casting speed hydraulic control system as claimed in claim 1, it is characterized in that, described flowmeter (5) is screw rod flowmeter, mass flowmenter or volumetric gear flow meter.
4. semi-continuous casting speed hydraulic control system as claimed in claim 3, it is characterized in that, described flow control device (6) is based on stepper motor Flow valve, describedly can to feed back described screw rod flowmeter based on stepper motor Flow valve, and by the size of the hydraulic fluid flow rate in PLC program control loop.
5. semi-continuous casting speed hydraulic control system as described in any one of Claims 1-4, it is characterized in that, also comprise and to be connected with described oil pump (2) and the selector valve (7) of described oil hydraulic cylinder (1) rise and fall can be controlled.
6. semi-continuous casting speed hydraulic control system as claimed in claim 5, is characterized in that, also comprise in parallel with described selector valve (7), the oil feeding device (8) be connected with described oil pump (2) oil outlet; One end and described selector valve (7) are parallel to the oil outlet of described oil pump (2), the relief valve (9) that the other end is connected with described fuel tank (4).
7. semi-continuous casting speed hydraulic control system as claimed in claim 1, it is characterized in that, described selector valve (7) is solenoid directional control valve.
8. semi-continuous casting speed hydraulic control system as claimed in claim 1, is characterized in that, by described motor (3) drive two described oil pumps (2) for whole system provides power.
9. semi-continuous casting speed hydraulic control system as claimed in claim 1, it is characterized in that, also comprise the filter (12) be arranged at respectively between described oil hydraulic cylinder (1) and described flowmeter (5), between described relief valve (9) and described fuel tank (4).
10. the semi-continuous casting speed hydraulic control system as described in any one of claim 6 to 9, is characterized in that, also comprises the pressure gauge (10) be arranged between described selector valve (7) and described oil pump (2) on loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744998.6A CN104454706A (en) | 2014-12-08 | 2014-12-08 | Hydraulic control system for semi-continuous casting speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744998.6A CN104454706A (en) | 2014-12-08 | 2014-12-08 | Hydraulic control system for semi-continuous casting speed |
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| Publication Number | Publication Date |
|---|---|
| CN104454706A true CN104454706A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410744998.6A Pending CN104454706A (en) | 2014-12-08 | 2014-12-08 | Hydraulic control system for semi-continuous casting speed |
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| Country | Link |
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| CN (1) | CN104454706A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661957A (en) * | 2018-06-27 | 2018-10-16 | 苏州力森克液压设备有限公司 | A kind of vertical engineering hydraulic cylinder |
| CN109434057A (en) * | 2018-12-27 | 2019-03-08 | 西南铝业（集团）有限责任公司 | A kind of high-accuracy cast system |
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| US3760688A (en) * | 1971-11-09 | 1973-09-25 | Bucyrus Erie Co | Synchronized control system for telescoping booms |
| CN101881287A (en) * | 2010-06-03 | 2010-11-10 | 西北工业大学 | High-pressure and hydraulic pulsation test system of aircraft |
| CN201982391U (en) * | 2010-12-20 | 2011-09-21 | 王俊涛 | Hydraulic speed limiting device |
| CN102261056A (en) * | 2011-05-06 | 2011-11-30 | 衢州市河川翻板闸门有限公司 | Hydraulic control system of flap gate |
| CN202690590U (en) * | 2012-07-25 | 2013-01-23 | 上海浦东汉威阀门有限公司 | Multistage protection hydraulic device |
| CN203272292U (en) * | 2013-05-20 | 2013-11-06 | 芜湖市银鸿液压件有限公司 | Hydraulic system of press |
| CN203272341U (en) * | 2013-06-07 | 2013-11-06 | 宁波创力液压机械制造有限公司 | Power-off protection safety casting hydraulic control valve unit |
| CN203817321U (en) * | 2014-03-20 | 2014-09-10 | 大连万恒冶金装备有限公司 | Casting speed control device for ingot casting of casting machine |
| CN204386968U (en) * | 2014-12-08 | 2015-06-10 | 西南铝业（集团）有限责任公司 | Casting machine speed hydraulic control system |
-
2014
- 2014-12-08 CN CN201410744998.6A patent/CN104454706A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3760688A (en) * | 1971-11-09 | 1973-09-25 | Bucyrus Erie Co | Synchronized control system for telescoping booms |
| CN101881287A (en) * | 2010-06-03 | 2010-11-10 | 西北工业大学 | High-pressure and hydraulic pulsation test system of aircraft |
| CN201982391U (en) * | 2010-12-20 | 2011-09-21 | 王俊涛 | Hydraulic speed limiting device |
| CN102261056A (en) * | 2011-05-06 | 2011-11-30 | 衢州市河川翻板闸门有限公司 | Hydraulic control system of flap gate |
| CN202690590U (en) * | 2012-07-25 | 2013-01-23 | 上海浦东汉威阀门有限公司 | Multistage protection hydraulic device |
| CN203272292U (en) * | 2013-05-20 | 2013-11-06 | 芜湖市银鸿液压件有限公司 | Hydraulic system of press |
| CN203272341U (en) * | 2013-06-07 | 2013-11-06 | 宁波创力液压机械制造有限公司 | Power-off protection safety casting hydraulic control valve unit |
| CN203817321U (en) * | 2014-03-20 | 2014-09-10 | 大连万恒冶金装备有限公司 | Casting speed control device for ingot casting of casting machine |
| CN204386968U (en) * | 2014-12-08 | 2015-06-10 | 西南铝业（集团）有限责任公司 | Casting machine speed hydraulic control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661957A (en) * | 2018-06-27 | 2018-10-16 | 苏州力森克液压设备有限公司 | A kind of vertical engineering hydraulic cylinder |
| CN109434057A (en) * | 2018-12-27 | 2019-03-08 | 西南铝业（集团）有限责任公司 | A kind of high-accuracy cast system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |