CN104226694A - Cast rolling machine prestress control system - Google Patents
Cast rolling machine prestress control system Download PDFInfo
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- CN104226694A CN104226694A CN201410517961.XA CN201410517961A CN104226694A CN 104226694 A CN104226694 A CN 104226694A CN 201410517961 A CN201410517961 A CN 201410517961A CN 104226694 A CN104226694 A CN 104226694A
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Abstract
A cast rolling machine prestress control system comprises a hydraulic cylinder, a valve and a power source. The hydraulic cylinder comprises a transmission side upwards-pressing cylinder and an operation side upwards-pressing cylinder. The power source comprises an intermediate-pressure large-flow oil source P and a high-pressure small-flow hydraulic oil source P. The intermediate-pressure large-flow oil source P is connected with a piston cavity pipeline of the transmission side upwards-pressing cylinder and a piston cavity pipeline of the operation side upwards-pressing cylinder. A leakage-free electromagnetic reversing valve A and a high-pressure ball valve A are sequentially arranged on the piston cavity pipeline of the transmission side upwards-pressing cylinder. A leakage-free electromagnetic reversing valve B and a high-pressure ball valve B are sequentially arranged on the piston cavity pipeline of the operation side upwards-pressing cylinder. The high-pressure small-flow hydraulic oil source P is connected with a piston cavity of the transmission side upwards-pressing cylinder through a small-flow server valve, the high-pressure ball valve A and pipelines and is connected with a piston cavity of the operation side upwards-pressing cylinder through a small-flow server valve, the high-pressure ball valve B and pipelines. The intermediate-pressure large-flow oil source P is connected with a piston rod cavity pipeline of the transmission side upwards-pressing cylinder and a piston rod cavity pipeline of the operation side upwards-pressing cylinder, and a reducing valve, an electromagnetic reversing valve and a safety valve are arranged on each pipeline.
Description
Technical field
The present invention relates to hydraulic control system field, especially relate to a kind of casting and rolling machine prestress control system.
Background technology
The aluminium liquid cooled and solidified that casting and rolling machine relies on two inside to lead to water-cooled Casting Roller to make to enter between roll gap, and roll-force is applied for the aluminum finstock after solidifying, make it produce the distortion of more than 15%.Casting and rolling machine can be divided into pre-stress type and non-prestressed formula two kinds by the classification of roller gap control system.Non-prestressed formula working method is having electric booster in load or uncharged situation to control the depressing position of pressure cylinder, and pressure size is set up by roll-force, and every side can control separately.Pre-stress type working method is place cushion block between upper and lower roll bearing housing, and preset roll gap, press the given pressure of cylinder, bearing housing and cushion block are pressed against completely, and this power is greater than maximum rolling force, and support is in pre-stressed state.Prestress control system in pre-stress type casting and rolling machine is very crucial, and its control performance directly affects the performance of casting and rolling machine.
In prior art, as shown in Figure 1, it comprises threeway proportional pressure-reducing valve 1 to casting and rolling machine prestress control systematic schematic diagram, threeway proportional pressure-reducing valve 2, Pressure gauge 3, pressure sensor 4, pressure sensor 5, Pressure gauge 6, transmission side presses cylinder 7, fore side presses cylinder 8, hydraulic control one-way valve 9, hydraulic control one-way valve 10, Pressure gauge 11, Double throttle check valve 12, three-position four-way electromagnetic directional valve 13 and pressure-reducing valve 14 etc.Pressure-reducing valve 14, three-position four-way electromagnetic directional valve 13, Double throttle check valve 12, the hydraulic oil in hydraulic control one-way valve 9 and hydraulic control one-way valve 10 is provided by middle force feed source P1, and middle force feed source P1 is large discharge oil sources, simultaneously for other hydraulic control system of casting and rolling machine provides oil sources.Hydraulic oil in threeway proportional pressure-reducing valve 1 and threeway proportional pressure-reducing valve 2 is provided by high-pressure low-flow hydraulic oil source P2.After in large discharge, force feed source P1 is reduced pressure by pressure-reducing valve 14, by three-position four-way electromagnetic directional valve 13, Double throttle check valve 12, the Hydraulic Elements such as hydraulic control one-way valve 9 and hydraulic control one-way valve 10 control transmission side and press rising and the decline that cylinder 7 and fore side press cylinder 8; Press cylinder rise bearing housing and cushion block are pressed against after, threeway proportional pressure-reducing valve 1 and threeway proportional pressure-reducing valve 2 control hydraulic oil, make to press cylinder plunger shaft pressure and reach operating pressure.
Above-mentioned casting and rolling machine prestress control system, what its Stress control adopted is threeway proportional pressure-reducing valve 1 and threeway proportional pressure-reducing valve 2, after pressure sensor 4 and pressure sensor 5 are arranged at proportional pressure-reducing valve, Stress control is half-closed loop control, in order to record prestressed size, also need between upper and lower roll bearing housing, be designed with independent pressure detecting and transmission display unit, add cost and the complexity of equipment; In addition, proportional pressure-relief valve control, response speed is slow, and control accuracy is low.Above-mentioned casting and rolling machine prestress control system, it presses that cylinder rises is that in large discharge, force feed source P1 is controlled after being reduced pressure by pressure-reducing valve 14, because the flow needed is comparatively large and decompression amplitude is large, causes energy loss large, Hydraulic System Fever amount is large, is unfavorable for effective operation of hydraulic system.Above-mentioned casting and rolling machine prestress control system, it presses the plunger shaft of cylinder and rod end chamber does not all arrange pressure protect, once occur that hydraulic valve blocks and other fortuitous event, may cause and press the badly damaged of cylinder and miscellaneous equipment.
Summary of the invention
In order to overcome the deficiency in background technology, the invention discloses the casting and rolling machine prestress control system providing simple, the high response of a kind of system, high accuracy control, its system energy loss is little, and security performance is high, reliable stable.
In order to realize described goal of the invention, the present invention adopts following technical scheme:
A kind of casting and rolling machine prestress control system, comprises hydraulic cylinder, valve and power source, and described hydraulic cylinder comprises transmission side and presses cylinder and fore side presses cylinder; Described power source comprises middle pressure large discharge oil sources P and high-pressure low-flow hydraulic oil source P; Described middle pressure large discharge oil sources P and transmission side press the plunger shaft pipeline that cylinder and fore side press cylinder and are connected, and the plunger shaft pipeline pressing cylinder with transmission side sets gradually No leakage solenoid directional control valve A, high-pressure ball valve A, the plunger shaft pipeline pressing cylinder with fore side sets gradually No leakage solenoid directional control valve B, high-pressure ball valve B; The described plunger shaft that high-pressure low-flow hydraulic oil source P presses cylinder with transmission side, fore side presses cylinder is connected by pipeline via low discharge servo valve and high-pressure ball valve A, low discharge servo valve and high-pressure ball valve B respectively; Described middle pressure large discharge oil sources P and transmission side press the rod end chamber pipeline that cylinder and fore side press cylinder and are connected, and on pipeline, be provided with pressure-reducing valve, solenoid directional control valve, safety valve.
Control system of the present invention also comprises electromagnetic relief valve A and electromagnetic relief valve B, and the oil-in of described electromagnetic relief valve A is connected with the pipeline between low discharge servo valve and high-pressure ball valve A; The oil-in of described electromagnetic relief valve B is connected with the pipeline between low discharge servo valve and high-pressure ball valve B; Described electromagnetic relief valve A is connected with outlet line with the oil-out of electromagnetic relief valve B.
Transmission side of the present invention presses in plunger shaft that cylinder and fore side press cylinder and arranges pressure sensor A, pressure sensor B respectively;
Pressure sensor of the present invention and low discharge servo valve mineralization pressure full closed loop control.
High-pressure ball valve A front end of the present invention pipeline arranges Pressure gauge A, described high-pressure ball valve B front end pipeline arranges Pressure gauge B, the connecting line between described safety valve and rod end chamber is arranged Pressure gauge C.
Pressure-reducing valve of the present invention, solenoid directional control valve and safety valve adopt Sandwich plate valve to be superimposed, and remaining fluid pressure valve adopts plate valve, and all hydraulic valves, high-pressure ball valve, Pressure gauge are installed on same valve platform, and valve platform is connected by pipeline with between hydraulic cylinder.
Owing to have employed technique scheme, the present invention has following beneficial effect:
This casting and rolling machine prestress control system, its system is simple, response frequency is high, control accuracy is high.Pressure sensor due to this system is arranged at the plunger shaft pressing cylinder, pressure sensor and low discharge servo valve mineralization pressure full closed loop control, so, do not need independent pressure detecting and transmission display unit, reduce cost and the complexity of equipment, in addition owing to adopting low discharge servo valve control system pressure, system responses frequency is high, control accuracy is high.Meanwhile, owing to adopting No leakage solenoid directional control valve directly to control the quick rising pressing cylinder, without pressure-reducing valve decompression, decrease the energy loss of system, reduce the caloric value of system, be conducive to effective operation of hydraulic system.Meanwhile, because the plunger shaft pressing cylinder is provided with electromagnetic relief valve, rod end chamber is provided with safety valve, so block if there is hydraulic valve and other fortuitous event, system can to pressing cylinder and miscellaneous equipment is effectively protected.
Accompanying drawing explanation
Fig. 1 is existing casting and rolling machine prestress control system pipeline schematic diagram;
Fig. 2 is casting and rolling machine prestress control system pipeline schematic diagram of the present invention;
In figure: 1, threeway proportional pressure-reducing valve; 2, threeway proportional pressure-reducing valve; 3, Pressure gauge; 4, pressure sensor; 5, pressure sensor; 6, Pressure gauge; 7, transmission side presses cylinder; 8, fore side presses cylinder; 9, hydraulic control one-way valve; 10, hydraulic control one-way valve; 11, Pressure gauge; 12, Double throttle check valve; 13, three-position four-way electromagnetic directional valve; 14, pressure-reducing valve; 15, low discharge servo valve A; 16, electromagnetic relief valve A; 17, No leakage solenoid directional control valve A; 18, Pressure gauge A; 19, high-pressure ball valve A; 20, transmission side presses cylinder; 21, pressure sensor A; 22, pressure sensor B; 23, fore side presses cylinder; 24, high-pressure ball valve B; 25, Pressure gauge B; 26, No leakage solenoid directional control valve B; 27, electromagnetic relief valve B; 28, Pressure gauge C; 29, safety valve; 30, solenoid directional control valve; 31, low discharge servo valve B; 32, pressure-reducing valve.
Detailed description of the invention
By explanation the present invention that the following examples can be detailed, disclose object of the present invention and be intended to protect all technological improvements in the scope of the invention.
As shown in Figure 2, casting and rolling machine prestress control system of the present invention, it mainly comprises low discharge servo valve A15; Electromagnetic relief valve A16; No leakage solenoid directional control valve A17; Pressure gauge A18; High-pressure ball valve A19; Transmission side presses cylinder 20; Pressure sensor A21; Pressure sensor B22; Fore side presses cylinder 23; High-pressure ball valve B24; Pressure gauge B25; No leakage solenoid directional control valve B26; Electromagnetic relief valve B27; Pressure gauge C28; Safety valve 29; Solenoid directional control valve 30; Low discharge servo valve B31; Pressure-reducing valve 32.
Described hydraulic cylinder comprises transmission side and presses cylinder 20 and fore side presses cylinder 23; Described power source comprises middle pressure large discharge oil sources P1 and high-pressure low-flow hydraulic oil source P2; Described middle pressure large discharge oil sources P1 and transmission side press the plunger shaft pipeline that cylinder 20 and fore side press cylinder 23 and are connected, and the plunger shaft pipeline pressing cylinder 20 with transmission side sets gradually No leakage solenoid directional control valve A17, high-pressure ball valve A19, the plunger shaft pipeline pressing cylinder 23 with fore side sets gradually No leakage solenoid directional control valve B26, high-pressure ball valve B24; The plunger shaft that described high-pressure low-flow hydraulic oil source P2 presses cylinder 20 with transmission side, fore side presses cylinder 23 is connected by pipeline via low discharge servo valve 15 and high-pressure ball valve A19, low discharge servo valve 31 and high-pressure ball valve B24 respectively; Described middle pressure large discharge oil sources P1 and transmission side press the rod end chamber pipeline that cylinder 20 and fore side press cylinder 23 and are connected, and on pipeline, be provided with pressure-reducing valve 32, solenoid directional control valve 30, safety valve 29, described pressure-reducing valve 32, solenoid directional control valve 30 and safety valve 29 adopt Sandwich plate valve to be superimposed, remaining fluid pressure valve adopts plate valve, and all hydraulic valves are installed on same valve platform.
Described control system also comprises electromagnetic relief valve A16 and electromagnetic relief valve B27, and the oil-in of described electromagnetic relief valve A16 is connected with the pipeline between low discharge servo valve 15 and high-pressure ball valve A19; The oil-in of described electromagnetic relief valve B27 is connected with the pipeline between low discharge servo valve 31 and high-pressure ball valve B24; Described electromagnetic relief valve A16 is connected with outlet line with the oil-out of electromagnetic relief valve B27.
Described transmission side presses in plunger shaft that cylinder 20 and fore side press cylinder 23 and arranges pressure sensor A 21, pressure sensor B 22 respectively; Described pressure sensor and low discharge servo valve mineralization pressure full closed loop control.
Described high-pressure ball valve A19 front end pipeline arranges Pressure gauge A18, described high-pressure ball valve B front end pipeline arranges Pressure gauge B25, the connecting line between described safety valve 29 and rod end chamber arranges Pressure gauge C28.
Low discharge servo valve 15, electromagnetic relief valve 16, No leakage solenoid directional control valve 17, Pressure gauge 18, high-pressure ball valve 19 and pressure sensor 21 control the plunger shaft fluid that transmission side presses cylinder 20; The plunger shaft fluid of low discharge servo valve 31, electromagnetic relief valve 27, No leakage solenoid directional control valve 26, Pressure gauge 25, high-pressure ball valve 24 and pressure sensor 22 control operation side pressure upper cylinder half 23; Pressure-reducing valve 32, solenoid directional control valve 30, safety valve 29 and Pressure gauge 28 control transmission side and press the rod end chamber fluid that cylinder 20 and fore side press cylinder 23.The plunger shaft that electromagnetic relief valve 16 pairs of transmission sides press cylinder 20 carries out pressure protect, the plunger shaft that electromagnetic relief valve 27 pairs of fore sides press cylinder 23 carries out pressure protect, and safety valve 29 pairs of transmission sides press the rod end chamber that cylinder 20 and fore side press cylinder 23 and carry out pressure protect; High-pressure ball valve 19 and 24 when system debug can by control system with press cylinder and separate, facilitate the debugging of system pressure and servo valve.
Operation principle of the present invention: when casting and rolling machine needs prestressing force to drop into, the electromagnet of electromagnetic relief valve 16 and electromagnetic relief valve 27 is charged, electromagnetic relief valve not off-load, the electromagnet of No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26 is charged, and the hydraulic oil that in large discharge, force feed source P1 provides enters transmission side respectively by No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26 and presses the plunger shaft that cylinder 20 and fore side press cylinder 23; Simultaneously, the electromagnet of low discharge servo valve 15 and low discharge servo valve 31 is charged, servo valve is operated in parallel position, the hydraulic oil that high-pressure low-flow hydraulic oil source P2 provides enters transmission side respectively by low discharge servo valve 15 and low discharge servo valve 31 and presses the plunger shaft that cylinder 20 and fore side press cylinder 23, now, press cylinder to rise fast.When press cylinder rise bearing housing and cushion block are pressed against after, transmission side presses the plunger shaft pressure oil pressure that cylinder 20 and fore side press cylinder 23 and sharply rises, when pressure increase is to the force value that the pressure of force feed source P1 in than large discharge is lower, the electromagnet power-off of No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26, No leakage solenoid directional control valve is operated in No leakage position; This force value is arranged by control program, when pressure sensor detect, the pressure that transmits back reach this force value time, by the electromagnet auto-breaking of programme-control No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26; After the electromagnet power-off of No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26, automatic control program drops into, pressure sensor 21 distinguishes mineralization pressure closed-loop control with low discharge servo valve 31, the force value that the pressure that low discharge servo valve control presses cylinder plunger shaft needs at prestressing force with low discharge servo valve 15 and pressure sensor 22.When casting and rolling machine does not need prestressing force to drop into, the electromagnet power-off of electromagnetic relief valve 16 and electromagnetic relief valve 27, electromagnetic relief valve off-load, simultaneously, the electromagnet of low discharge servo valve 15 and low discharge servo valve 31 is charged, and servo valve is operated in intersection position, presses the pressure quick relief of cylinder plunger shaft; Meanwhile, the electromagnet of solenoid directional control valve 30 is charged, after in large discharge, the pressure oil of force feed source P1 is reduced pressure by pressure-reducing valve 32, enter transmission side by solenoid directional control valve 30 and press the rod end chamber that cylinder 20 and fore side press cylinder 23, control transmission side and press the quick decline that cylinder 20 and fore side press cylinder 23.
Part not in the detailed description of the invention is prior art.
Claims (6)
1. a casting and rolling machine prestress control system, comprises hydraulic cylinder, valve and power source, it is characterized in that: described hydraulic cylinder comprises transmission side and presses cylinder (20) and fore side presses cylinder (23); Described transmission side presses in plunger shaft that cylinder (20) and fore side press cylinder (23) and arranges pressure sensor A(21 respectively), pressure sensor B(22); Described power source comprises middle pressure large discharge oil sources P1 and high-pressure low-flow hydraulic oil source P2; Described high-pressure low-flow hydraulic oil source P2 and transmission side press between plunger shaft that cylinder (20) and fore side press cylinder (23) and arrange low discharge servo valve (15) and low discharge servo valve (31) respectively, described pressure sensor and low discharge servo valve mineralization pressure full closed loop control.
2. casting and rolling machine prestress control system as claimed in claim 1, is characterized in that: described middle pressure large discharge oil sources P1 and transmission side press between rod end chamber that cylinder (20) and fore side press cylinder (23) and be provided with pressure-reducing valve (32), solenoid directional control valve (30), safety valve (29); Described pressure-reducing valve (32), solenoid directional control valve (30) and safety valve (29) adopt Sandwich plate valve to be superimposed.
3. casting and rolling machine prestress control system as claimed in claim 1, is characterized in that: described transmission side presses on plunger shaft oil circuit control that cylinder (20) and fore side press cylinder (23) and is also provided with electromagnetic relief valve A(16) and electromagnetic relief valve B(27).
4. casting and rolling machine prestress control system as claimed in claim 1, is characterized in that: described middle pressure large discharge oil sources P1 and transmission side press between plunger shaft that cylinder (20) and fore side press cylinder (23) and arrange No leakage solenoid directional control valve A(17 respectively) and No leakage solenoid directional control valve B(26); Described pressure sensor and No leakage solenoid directional control valve mineralization pressure full closed loop control.
5. casting and rolling machine prestress control system as claimed in claim 1, it is characterized in that: described transmission side press cylinder (20) and fore side press between the plunger shaft of cylinder (23) and power source high-pressure ball valve A(19 is also set) and high-pressure ball valve B(24), described high-pressure ball valve will press cylinder and control system separates.
6. casting and rolling machine prestress control system as claimed in claim 1, it is characterized in that: described high-pressure ball valve A(19) on Pressure gauge A(18 is set), described high-pressure ball valve B(24) on Pressure gauge B(25 is set), between described safety valve (29) and rod end chamber, Pressure gauge C(28 is set).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410517961.XA CN104226694B (en) | 2014-09-30 | 2014-09-30 | Cast rolling machine prestress control system |
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| CN201410517961.XA CN104226694B (en) | 2014-09-30 | 2014-09-30 | Cast rolling machine prestress control system |
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| CN104226694B CN104226694B (en) | 2017-02-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107013518A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | A kind of polishing machine hydraulic pressure pressure upper controller and method |
| CN107008875A (en) * | 2017-04-12 | 2017-08-04 | 宣化钢铁集团有限责任公司 | The implementation method of billet caster double-mode |
| CN110131240A (en) * | 2019-05-16 | 2019-08-16 | 中国重型机械研究院股份公司 | A kind of hydraulic position and pressure closed loop control dynamic static simulation pilot system and method |
| CN110394434A (en) * | 2019-08-06 | 2019-11-01 | 北京首钢国际工程技术有限公司 | A kind of big pressure rolling mill screwdown roller hydraulic control valve platform of continuous casting billet |
| CN115815338A (en) * | 2023-01-10 | 2023-03-21 | 太原理工大学 | Hydraulic pressing system suitable for double-machine linkage ultra-large shaft wedge cross rolling mill |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013518A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | A kind of polishing machine hydraulic pressure pressure upper controller and method |
| CN107008875A (en) * | 2017-04-12 | 2017-08-04 | 宣化钢铁集团有限责任公司 | The implementation method of billet caster double-mode |
| CN110131240A (en) * | 2019-05-16 | 2019-08-16 | 中国重型机械研究院股份公司 | A kind of hydraulic position and pressure closed loop control dynamic static simulation pilot system and method |
| CN110131240B (en) * | 2019-05-16 | 2024-04-30 | 中国重型机械研究院股份公司 | Hydraulic position and pressure closed-loop control dynamic and static simulation test system and method |
| CN110394434A (en) * | 2019-08-06 | 2019-11-01 | 北京首钢国际工程技术有限公司 | A kind of big pressure rolling mill screwdown roller hydraulic control valve platform of continuous casting billet |
| CN110394434B (en) * | 2019-08-06 | 2024-03-29 | 北京首钢国际工程技术有限公司 | Continuous casting billet large-reduction rolling mill reduction roll hydraulic control valve table |
| CN115815338A (en) * | 2023-01-10 | 2023-03-21 | 太原理工大学 | Hydraulic pressing system suitable for double-machine linkage ultra-large shaft wedge cross rolling mill |
| CN115815338B (en) * | 2023-01-10 | 2023-07-04 | 太原理工大学 | Hydraulic pressing system suitable for double-machine linkage ultra-large shaft wedge cross rolling mill |
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