CN104226694B - Cast rolling machine prestress control system - Google Patents
Cast rolling machine prestress control system Download PDFInfo
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- CN104226694B CN104226694B CN201410517961.XA CN201410517961A CN104226694B CN 104226694 B CN104226694 B CN 104226694B CN 201410517961 A CN201410517961 A CN 201410517961A CN 104226694 B CN104226694 B CN 104226694B
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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
Casting and rolling machine relies on the Casting Roller of two internal water flowing coolings to make the aluminium liquid cooled and solidified between entrance roll gap, and right
Aluminum finstock after solidification applies roll-force so as to produce more than 15% deformation.Casting and rolling machine presses the classification of roller gap control system
Pre-stress type and two kinds of non-prestressed formula can be divided into.Non-prestressed formula working method be have load or uncharged in the case of electricity
Dynamic supercharger controls the depressing position of pressure cylinder, and pressure size is set up by roll-force, and every side can individually control.Pre-stress type works
Mode is to place cushion block between upper and lower roll bearing housing, default roll gap, and pressure upper cylinder half gives a pressure, makes bearing housing complete with cushion block
It is pressed against, this power is more than maximum rolling force, support is in pre-stressed state.Prestress control system in pre-stress type casting and rolling machine is non-
The normally off key, its control performance directly affects the performance of casting and rolling machine.
In prior art, casting and rolling machine prestress control systematic schematic diagram as shown in figure 1, it includes threeway proportional pressure-reducing valve 1,
Threeway proportional pressure-reducing valve 2, pressure gauge 3, pressure transducer 4, pressure transducer 5, pressure gauge 6, it is driven side pressure upper cylinder half 7, fore side
Pressure upper cylinder half 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
With air relief valve 14 etc..Air relief valve 14, three-position four-way electromagnetic directional valve 13, Double throttle check valve 12, hydraulic control one-way valve 9 and hydraulic control list
There is provided to the hydraulic oil in valve 10 by middle force feed source P1, middle force feed source P1 is big flow oil sources, simultaneously for casting and rolling machine other hydraulic pressure
Control system provides oil sources.Hydraulic oil in threeway proportional pressure-reducing valve 1 and threeway proportional pressure-reducing valve 2 is by high-pressure low-flow hydraulic oil
Source P2 provides.Source P1 is pressed oil after air relief valve 14 decompression in big flow, by three-position four-way electromagnetic directional valve 13, double unidirectional sections
Stream valve 12, the Hydraulic Elements such as hydraulic control one-way valve 9 and hydraulic control one-way valve 10 control transmission side pressure upper cylinder half 7 and operate side pressure upper cylinder half 8
Rise and decline；After pressure upper cylinder half rising makes bearing housing and cushion block be pressed against, threeway proportional pressure-reducing valve 1 and threeway proportional pressure-reducing valve 2 are controlled
Hydraulic oil processed, makes pressure upper cylinder half piston cavity pressure reach operating pressure.
Above-mentioned casting and rolling machine prestress control system, its Stress control uses threeway proportional pressure-reducing valve 1 and threeway ratio
After example air relief valve 2, pressure transducer 4 and pressure transducer 5 are arranged at proportional pressure-reducing valve, Stress control is half-closed loop control, is
Record prestressed size in addition it is also necessary to be designed with single pressure detecting and transmission display device between upper and lower roll bearing housing,
Increased cost and the complexity of equipment；In addition, proportional pressure-relief valve control, slowly, control accuracy is low for response speed.Above-mentioned casting
Milling train prestress control system, it is that in big flow, force feed source P1 is controlled after air relief valve 14 decompression that its pressure upper cylinder half rises, due to
The flow needing is larger and the amplitude that reduces pressure is big, causes energy loss big, Hydraulic System Fever amount is big, and be unfavorable for hydraulic system has
Effect is run.Above-mentioned casting and rolling machine prestress control system, the plunger shaft of its pressure upper cylinder half and rod end chamber are all not provided with pressure and protect
Shield, once hydraulic valve blocking and other fortuitous event, is likely to result in the badly damaged of pressure upper cylinder half and miscellaneous equipment.
Content of the invention
In order to overcome the shortcomings of in background technology, the invention discloses providing a kind of simple system, high response, high accuracy to control
The casting and rolling machine prestress control system of system, 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 the following technical scheme that：
A kind of casting and rolling machine prestress control system, including hydraulic cylinder, valve and power source, described hydraulic cylinder includes transmission side
Pressure upper cylinder half and operation side pressure upper cylinder half；Described power source includes middle pressure big flow oil sources P and high-pressure low-flow hydraulic oil source P；Described
Middle pressure big flow oil sources P with transmission side pressure upper cylinder half and operation side pressure upper cylinder half plunger shaft pipeline be connected, and be driven side pressure upper cylinder half
Plunger shaft pipeline on set gradually No leakage solenoid directional control valve A, high-pressure ball valve A, with operation side pressure upper cylinder half plunger shaft pipeline
On set gradually No leakage solenoid directional control valve B, high-pressure ball valve B；Described high-pressure low-flow hydraulic oil source P with transmission side pressure upper cylinder half,
The plunger shaft of operation side pressure upper cylinder half is respectively via low discharge servo valve and high-pressure ball valve A, low discharge servo valve and smash
Valve B is connected by pipeline；Medium pressure big flow oil sources P and the rod end chamber pipeline being driven side pressure upper cylinder half and operation side pressure upper cylinder half
Connect, and air relief valve, solenoid directional control valve, relief valve are provided with pipeline.
Control system of the present invention also includes electromagnetic relief valve A and electromagnetic relief valve B, and described electromagnetic relief valve A enters
Pipeline between hydraulic fluid port and low discharge servo valve and high-pressure ball valve A is connected；The oil-in of described electromagnetic relief valve B and low discharge
Pipeline between servo valve and high-pressure ball valve B connects；The oil-out of described electromagnetic relief valve A and electromagnetic relief valve B with fuel-displaced
Pipeline connects.
It is respectively provided with pressure transducer A, pressure in the plunger shaft of transmission side pressure upper cylinder half of the present invention and operation side pressure upper cylinder half
Force transducer B；
Pressure transducer of the present invention forms pressure full closed loop control with low discharge servo valve.
On the pipeline of high-pressure ball valve A front end of the present invention, pressure Table A is set, described high-pressure ball valve B front end pipeline is arranged
Pressure gauge B, the connecting line between described relief valve and rod end chamber arranges pressure gauge C.
Air relief valve of the present invention, solenoid directional control valve and relief valve are superimposed using Sandwich plate valve, and remaining hydraulic valve is adopted
With plate valve, all of hydraulic valve, high-pressure ball valve, pressure gauge are installed on same valve platform, logical between valve platform and hydraulic cylinder
Cross pipeline to connect.
Due to employing technique scheme, the present invention has the advantages that：
This casting and rolling machine prestress control system, its simple system, response frequency are high, control accuracy is high.Due to this system
Pressure transducer is arranged at the plunger shaft of pressure upper cylinder half, and pressure transducer forms pressure full closed loop control, institute with low discharge servo valve
It is not necessary to single pressure detecting and transmission display device, to reduce cost and the complexity of equipment, additionally, due to employing
Low discharge servo valve control system pressure, system response frequency is high, control accuracy is high.Simultaneously as being changed using No leakage electromagnetism
Directly control the rapid increase of pressure upper cylinder half to valve, without air relief valve decompression, decrease the energy loss of system, reduce system
Caloric value, be conducive to effective operation of hydraulic system.Simultaneously as the plunger shaft of pressure upper cylinder half is provided with electromagnetic relief valve, live
Stopper rod chamber is provided with relief valve, so, block if there is hydraulic valve and other fortuitous event, system can to pressure upper cylinder half and its
Its equipment is effectively protected.
Brief description
Fig. 1 is existing casting and rolling machine prestress control system pipeline schematic diagram；
Fig. 2 is the casting and rolling machine prestress control system pipeline schematic diagram of the present invention；
In figure：1st, threeway proportional pressure-reducing valve；2nd, threeway proportional pressure-reducing valve；3rd, pressure gauge；4th, pressure transducer；5th, pressure passes
Sensor；6th, pressure gauge；7th, it is driven side pressure upper cylinder half；8th, operate side pressure upper cylinder half；9th, hydraulic control one-way valve；10th, hydraulic control one-way valve；11st, press
Power table；12nd, Double throttle check valve；13rd, three-position four-way electromagnetic directional valve；14th, air relief valve；15th, low discharge servo valve A；16th, electromagnetism
Overflow valve A；17th, No leakage solenoid directional control valve A；18th, pressure Table A；19th, high-pressure ball valve A；20th, it is driven side pressure upper cylinder half；21st, pressure
Sensors A；22nd, pressure transducer B；23rd, operate side pressure upper cylinder half；24th, high-pressure ball valve B；25th, pressure gauge B；26th, No leakage electromagnetism
Reversal valve B；27th, electromagnetic relief valve B；28th, pressure gauge C；29th, relief valve；30th, solenoid directional control valve；31st, low discharge servo valve B；
32nd, air relief valve.
Specific embodiment
The explanation present invention that can be detailed by the following examples, the open purpose of the present invention is intended to protect model of the present invention
All technological improvements in enclosing.
As shown in Fig. 2 casting and rolling machine prestress control system of the present invention, it mainly includes 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 pressure upper cylinder half 20；Pressure passes
Sensor A21；Pressure transducer B22；Operation side pressure upper cylinder half 23；High-pressure ball valve B24；Pressure gauge B25；No leakage solenoid directional control valve
B26；Electromagnetic relief valve B27；Pressure gauge C28；Relief valve 29；Solenoid directional control valve 30；Low discharge servo valve B31；Air relief valve 32.
Described hydraulic cylinder includes being driven side pressure upper cylinder half 20 and operation side pressure upper cylinder half 23；Described power source includes middle pressure big flow
Oil sources P1 and high-pressure low-flow hydraulic oil source P2；On medium pressure big flow oil sources P1 and transmission side pressure upper cylinder half 20 and operation side pressure
The plunger shaft pipeline of cylinder 23 connects, and sets gradually No leakage solenoid directional control valve with being driven on the plunger shaft pipeline of side pressure upper cylinder half 20
No leakage solenoid directional control valve B26, height is set gradually on A17, high-pressure ball valve A19, with the plunger shaft pipeline of operation side pressure upper cylinder half 23
Pressure ball valve B24；Described high-pressure low-flow hydraulic oil source P2 and the plunger shaft difference being driven side pressure upper cylinder half 20, operation side pressure upper cylinder half 23
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；
Medium pressure big flow oil sources P1 is connected with the rod end chamber pipeline of transmission side pressure upper cylinder half 20 and operation side pressure upper cylinder half 23, and in pipe
Air relief valve 32, solenoid directional control valve 30, relief valve 29, described air relief valve 32, solenoid directional control valve 30 and relief valve 29 are provided with road
It is superimposed using Sandwich plate valve, remaining hydraulic valve adopts plate valve, all of hydraulic valve is installed on same valve platform.
Described control system also includes electromagnetic relief valve A16 and electromagnetic relief valve B27, and described electromagnetic relief valve A16 enters
Pipeline between hydraulic fluid port and low discharge servo valve 15 and high-pressure ball valve A19 is connected；The oil-in of described electromagnetic relief valve B27 with
Pipeline between low discharge servo valve 31 and high-pressure ball valve B24 connects；Described electromagnetic relief valve A16 and electromagnetic relief valve B27
Oil-out be connected with outlet line.
It is respectively provided with pressure transducer A 21, pressure in the plunger shaft of described transmission side pressure upper cylinder half 20 and operation side pressure upper cylinder half 23
Force transducer B 22；Described pressure transducer forms pressure full closed loop control with low discharge servo valve.
On the pipeline of described high-pressure ball valve A19 front end, pressure gauge A18 is set, setting pressure on the pipeline of described high-pressure ball valve B front end
Power table B25, the connecting line between described relief 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 transducer 21 controls the plunger shaft fluid of transmission side pressure upper cylinder half 20；Low discharge servo valve 31, electromagnetic relief valve 27, No leakage
Solenoid directional control valve 26, the plunger shaft fluid of pressure gauge 25, high-pressure ball valve 24 and pressure transducer 22 control operation side pressure upper cylinder half 23；
Air relief valve 32, solenoid directional control valve 30, relief valve 29 and pressure gauge 28 control transmission side pressure upper cylinder half 20 and operate side pressure upper cylinder half 23
Rod end chamber fluid.Electromagnetic relief valve 16 carries out pressure protection to the plunger shaft of transmission side pressure upper cylinder half 20, and electromagnetic relief valve 27 is right
The plunger shaft of operation side pressure upper cylinder half 23 carries out pressure protection, and relief valve 29 to transmission side pressure upper cylinder half 20 and operates side pressure upper cylinder half 23
Rod end chamber carries out pressure protection；Control system can be separated with pressure upper cylinder half by high-pressure ball valve 19 and 24 in system debug, side
Just the debugging of system pressure and servo valve.
The operation principle of the present invention：When casting and rolling machine needs prestressing force to put into, electromagnetic relief valve 16 and electromagnetic relief valve 27
Electric magnet is powered, electromagnetic relief valve not off-load, the electromagnetism sheet iron strip of No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26
Electricity, the hydraulic oil that in big flow, force feed source P1 provides passes through No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26 difference
Enter transmission side pressure upper cylinder half 20 and the plunger shaft of operation side pressure upper cylinder half 23；Meanwhile, low discharge servo valve 15 and low discharge servo valve
31 electric magnet is powered, and servo valve is operated in parallel position, and the hydraulic oil that high-pressure low-flow hydraulic oil source P2 provides passes through low discharge
Servo valve 15 and low discharge servo valve 31 respectively enter transmission side pressure upper cylinder half 20 and the plunger shaft of operation side pressure upper cylinder half 23, now,
Pressure upper cylinder half rapid increase.After so that bearing housing is pressed against with cushion block when pressing upper cylinder half to rise, it is driven side pressure upper cylinder half 20 and operation side pressure upper cylinder half
23 plunger shaft pressure oil pressure steeply rises, the pressure of force feed source P1 is lower in pressure rises to than big flow one
During pressure value, the electric magnet power-off of No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26, No leakage solenoid directional control valve
It is operated in No leakage position；This pressure value is arranged by control program, when pressure transducer detection, the pressure that is transmitted back to reach this
During pressure value, automatically powered off by the electric magnet of programme-control No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26；When
After the electric magnet power-off of No leakage solenoid directional control valve 17 and No leakage solenoid directional control valve 26, automatic control program puts into, and pressure passes
Sensor 21 forms pressure closed loop with low discharge servo valve 15 and pressure transducer 22 respectively with low discharge servo valve 31 and controls, rill
Amount servo valve control presses the pressure value that the pressure of upper cylinder half plunger shaft needs in prestressing force.When casting and rolling machine does not need prestressing force to put into,
The electric magnet power-off of electromagnetic relief valve 16 and electromagnetic relief valve 27, electromagnetic relief valve off-load, meanwhile, low discharge servo valve 15 and little
The electric magnet of serving volume valve 31 is powered, and servo valve is operated in intersection position, the pressure quick relief of pressure upper cylinder half plunger shaft；Same with this
When, the electric magnet of solenoid directional control valve 30 is powered, in big flow press oil source P1 pressure oil pass through air relief valve 32 reduce pressure after, by electricity
Magnetic reversal valve 30 enters transmission side pressure upper cylinder half 20 and the rod end chamber of operation side pressure upper cylinder half 23, controls transmission side pressure upper cylinder half 20 and behaviour
Make the rapid decrease of side pressure upper cylinder half 23.
Part not in the detailed description of the invention is prior art.
Claims (5)
1. a kind of casting and rolling machine prestress control system, including hydraulic cylinder, valve and power source, is characterized in that：Described hydraulic cylinder bag
Include transmission side pressure upper cylinder half（20）With operation side pressure upper cylinder half（23）；Described transmission side pressure upper cylinder half（20）With operation side pressure upper cylinder half（23）'s
Pressure transducer A is respectively provided with plunger shaft（ 21）, pressure transducer B（ 22）；Described power source includes middle pressure big flow oil
Source P1 and high-pressure low-flow hydraulic oil source P2；Described high-pressure low-flow hydraulic oil source P2 and transmission side pressure upper cylinder half（20）And fore side
Pressure upper cylinder half（23）Plunger shaft between be respectively provided with low discharge servo valve（15）And low discharge servo valve（31）, described pressure sensing
Device A（ 21）With low discharge servo valve（15）, pressure transducer B（ 22）With low discharge servo valve（31）Form pressure closed-loop control
System；Medium pressure big flow oil sources P1 and transmission side pressure upper cylinder half（20）With operation side pressure upper cylinder half（23）Rod end chamber between arrange
There is air relief valve（32）, solenoid directional control valve（30）, relief valve（29）；Described air relief valve（32）, solenoid directional control valve（30）And relief valve
（29）It is superimposed using Sandwich plate valve.
2. casting and rolling machine prestress control system as claimed in claim 1, is characterized in that：Described transmission side pressure upper cylinder half（20）And behaviour
Make side pressure upper cylinder half（23）Plunger shaft oil circuit control on be additionally provided with electromagnetic relief valve A（16）With electromagnetic relief valve B（27）.
3. casting and rolling machine prestress control system as claimed in claim 1, is characterized in that：Medium pressure big flow oil sources P1 with
Transmission side pressure upper cylinder half（20）With operation side pressure upper cylinder half（23）Plunger shaft between be respectively provided with No leakage solenoid directional control valve A（17）And
No leakage solenoid directional control valve B（26）；Described pressure transducer A（ 21）With No leakage solenoid directional control valve A（17）, pressure transducer B
（ 22）With No leakage solenoid directional control valve B（26）Form pressure full closed loop control.
4. casting and rolling machine prestress control system as claimed in claim 1, is characterized in that：Described transmission side pressure upper cylinder half（20）And behaviour
Make side pressure upper cylinder half（23）Plunger shaft and power source between also set up high-pressure ball valve A（19）With high-pressure ball valve B（24）, described high pressure
Ball valve A（19）Side pressure upper cylinder half will be driven（20）, high-pressure ball valve B（24）Side pressure upper cylinder half will be operated（23）Separate with control system.
5. casting and rolling machine prestress control system as claimed in claim 4, is characterized in that：Described high-pressure ball valve A（19）Upper setting
Pressure Table A（18）, described high-pressure ball valve B（24）Upper setting pressure gauge B（25）, described relief valve（29）Set and rod end chamber between
Put pressure gauge C（28）.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410517961.XA CN104226694B (en) | 2014-09-30 | 2014-09-30 | Cast rolling machine prestress control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410517961.XA CN104226694B (en) | 2014-09-30 | 2014-09-30 | Cast rolling machine prestress control system |
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| CN104226694A CN104226694A (en) | 2014-12-24 |
| CN104226694B true CN104226694B (en) | 2017-02-15 |
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|---|---|---|---|---|
| CN107013518A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | Hydraulic pressure upper control device and method for finishing machine |
| CN107008875B (en) * | 2017-04-12 | 2022-07-05 | 宣化钢铁集团有限责任公司 | Device for realizing double operation modes of billet continuous casting machine |
| 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 |
| 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 |
| 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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