CN102343366A - Quick-open hydraulic control loop of main hydraulic cylinder of mandrel pipe mill - Google Patents
Quick-open hydraulic control loop of main hydraulic cylinder of mandrel pipe mill Download PDFInfo
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- CN102343366A CN102343366A CN2011102305693A CN201110230569A CN102343366A CN 102343366 A CN102343366 A CN 102343366A CN 2011102305693 A CN2011102305693 A CN 2011102305693A CN 201110230569 A CN201110230569 A CN 201110230569A CN 102343366 A CN102343366 A CN 102343366A
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Abstract
The invention discloses a quick-open hydraulic control loop of a main hydraulic cylinder of a mandrel pipe mill. The quick-open hydraulic control loop comprises a pressure sensor, a main pressure oil circuit, a main oil return circuit, a digital readout pressure relay and a proportional overflow valve, wherein the pressure sensor is arranged in the main pressure oil circuit; the digital readout pressure relay and the proportional overflow valve are arranged in the main pressure oil circuit; the pressure sensor is in communicating connection with the proportional overflow valve so as to control the opening of the proportional overflow valve according to the pressure of the main pressure oil circuit; and an oil return port and an oil spill port of the proportional overflow valve are both connected with the main oil return circuit. By adding the digital readout pressure relay and the proportional overflow valve, debugging can be performed conveniently and rapidly in the invention.
Description
Technical field
The present invention relates to a kind of hydraulic control circuit of hydraulic cylinder, relate in particular to a kind of tandem rolling tube machine main hydraulic cylinder and open hydraulic control circuit soon, belong to the rolling machinery technical field of hydraulic.
Background technology
Tandem rolling tube machine in the mechanical equipment of steel rolling, particularly continuous rolling-tube unit adopts hydraulic test controlled rolling roll gap.The control loop of adjustment roll gap is carried out and to be comprised the depressing of main hydraulic cylinder, open soon and functions such as the adjustment of balance hydraulic cylinder and balance locking.Tandem rolling tube machine is in the operation of rolling, if true roll-force has surpassed the standard roll-force of design, main hydraulic cylinder master chamber release increases roll gap rapidly, guarantees that rolled piece passes through smoothly, avoids device damage simultaneously.
Five frame three-roller tandem rolling tube machines have five groups of tandem rolling frames that are arranged in order, and three cover roll devices are arranged in every group of frame, and every cover roll is by an independent transmission of final drive shaft.In the same frame three cover roll is 120 degree angles mutually perpendicular to roll line evenly to be arranged, forms rolling groove.Three cover roll devices of adjacent frame, the 60 degree angles of staggering arrange that the roll device of such one, three, five frames is arranged identical, and the roll device of two, four frames is arranged identical.Every cover roll device has a cover roll gap adjustment hydraulic system to be used to control depressing, open soon and roll balance adjustment and locking of this roll, and is corresponding so five frame three-roller tandem rolling tube machines have 15 cover rolls, and what 15 cover main hydraulic cylinders were also arranged opens control loop soon.The hydraulic pressure of every cover main hydraulic cylinder is depressed and to open the control loop principle soon identical; The Hydraulic Elements that constitute control loop are installed on the valve piece; The valve piece is installed on the main hydraulic cylinder head flanges; 15 identical hydraulic valve blocks are so just arranged, and each valve piece is distributed in the different azimuth of tandem rolling tube machine according to the position of each roll.
It is as shown in Figure 1 that the main hydraulic cylinder of existing roll is opened control loop soon, and what electromagnetic relief valve 10, pressure sensor 20, principal pressure oil circuit P, main oil return line T were connected to form main hydraulic cylinder 30 opens control loop soon.Main hydraulic cylinder 30 tops are equipped with balance hydraulic cylinder 40.Get into the main chamber 310 of main hydraulic cylinder 30 through principal pressure oil circuit P from the hydraulic oil of hydraulic power source; Principal pressure oil circuit P goes up the pressure sensor of installing 20 and is used to measure pressure wherein; The electromagnetic relief valve 10 that is parallel to principal pressure oil circuit P through electromagnet Y1 main chamber 310 releases of electric control main hydraulic cylinder 30, promptly main hydraulic cylinder 30 opens control soon.The pressure of opening soon of main hydraulic cylinder 30 is set up by the overflow valve in the electromagnetic relief valve 10, and the oil return opening of electromagnetic relief valve 10 all inserts main oil return line T with outer drain tap (unmarked among the figure).
The main hydraulic cylinder 30 of prior art shown in Figure 1 to open the control loop operation principle soon following: regulate the overflow valve in the electromagnetic relief valve 10; Make it satisfy the pressure in the main chamber 310 of the required main hydraulic cylinder of design standard roll-force 30; The lock adjustment bolt, this force value is called the main hydraulic cylinder normal pressure.In the operation of rolling, electromagnet Y1 is a power failure state.When true roll-force surpasses the design standard roll-force, the force value that the pressure sensor 20 in the main chamber 310 of main hydraulic cylinder 30 the shows force value that is above standard, electromagnet Y1 receives the instruction that pressure sensor 20 transmits; Must be electric, the overflow valve of electromagnetic relief valve 10 is opened, main chamber 310 releases of main hydraulic cylinder 30; Roll deviates from the roll line direction operation; Rolling roll gap increases, and guarantees that rolled piece passes through smoothly, avoids device damage simultaneously.The hydraulic circuit of opening soon of main hydraulic cylinder 30 belongs to roll-force error protection control loop.
Though opening control loop soon, the tandem rolling tube machine main hydraulic cylinder of Fig. 1 satisfies the technological requirement that the tandem rolling tube machine main hydraulic cylinder is opened at accident condition soon basically; If the operating pressure of hydraulic system is 30MPa; 15 control valve pieces are installed on the diverse location of tandem rolling tube machine frame; When the commissioning staff debugs, must climb to the setting of carrying out overflow valve pressure on each valve piece of each frame; When the pressure of adjustment overflow valve, can't directly read simultaneously the force value of overflow valve from the valve piece; Can only adjust through conversing with the main operation chamber, visible existing tandem rolling tube machine main hydraulic cylinder is opened hydraulic control circuit soon and existed following deficiency: debugging difficulty is big, workload is big, danger is high.
Summary of the invention
The object of the present invention is to provide a kind of tandem rolling tube machine main hydraulic cylinder to open hydraulic control circuit soon, to solve the various problems that existing control loop exists in debug process.
To achieve these goals; Tandem rolling tube machine main hydraulic cylinder provided by the invention is opened hydraulic control circuit soon and is comprised pressure sensor, principal pressure oil circuit, main oil return line; Said pressure sensor is installed on said principal pressure oil circuit; Wherein, also comprise digital display pressure switch, proportional pressure control valve, said digital display pressure switch and said proportional pressure control valve are installed on said principal pressure oil circuit; Said pressure sensor is communicated by letter with being connected to control said proportional pressure control valve according to the pressure of said principal pressure oil circuit with said proportional pressure control valve and is opened, and the oil return opening of said proportional pressure control valve all is connected with said main oil return line with outer drain tap.
Through increasing the utilization of digital display pressure switch and proportional pressure control valve, the present invention can conveniently debug.
Description of drawings
Fig. 1 opens the structural representation of hydraulic control circuit soon for existing tandem rolling tube machine main hydraulic cylinder;
Fig. 2 opens the structural representation of hydraulic control circuit soon for tandem rolling tube machine main hydraulic cylinder of the present invention.
The specific embodiment
Describe the present invention below in conjunction with the accompanying drawing and the specific embodiment.
Fig. 2 schematically shows structure of the present invention, shown in it, the present invention includes proportional pressure control valve 1, pressure sensor 2, digital display pressure switch 5, principal pressure oil circuit P and main oil return line T.Pressure sensor 2, digital display pressure switch 5 are installed on principal pressure oil circuit P.Pressure sensor 2 is communicated by letter with proportional pressure control valve Y2 and is connected (communication channel is not shown).The oil return opening of proportional pressure control valve 1 all is connected in main oil return line T with outer drain tap.
When application or debugging were of the present invention, principal pressure oil circuit P was connected in the main chamber 31 of main hydraulic cylinder 3, and main hydraulic cylinder 3 tops are provided with balance hydraulic cylinder 4.Get into the main chamber 31 of main hydraulic cylinder 3 through principal pressure oil circuit P from the principal pressure oil of hydraulic power source; Principal pressure oil circuit P goes up the pressure sensor of installing 2 and measures the pressure among the principal pressure oil circuit P with digital display pressure switch 5; The proportional pressure control valve 5 that is parallel to principal pressure oil circuit P is adjusted the pressure of main hydraulic cylinder 3 and the release in main chamber 31 through the input voltage of regulating proportion electro-magnet Y2, and promptly main hydraulic cylinder 3 opens control soon.
Pressure sensor 2 of the present invention is the pressure of principal pressure oil circuit P with 5 measurements of digital display pressure switch, also is the pressure in main hydraulic cylinder 3 main chambeies 31.These two force value all transfer to the main operation chamber with analog quantity and force value are presented on the main menu, and the demarcation of pressure sensor 2 can be accomplished at the master control operating room by means of digital display pressure switch 5.Equally, the pressure setting of the proportional pressure control valve 1 of 15 band integrated amplifiers is accomplished at the master control operating room equally.Like this; The commissioning staff again need not climb on each on-the-spot valve piece and debug; Pressure display on the on-the-spot valve piece helps the monitoring of site operation personnel to main hydraulic cylinder 3 pressure; Guarantee commissioning staff's safety fully, made debugging work of the present invention become extremely simple, safety, convenience.
Use when of the present invention, at first carry out the staking-out work of pressure sensor 2, the detection signal of opening controlled pressure adopts pressure sensor 2 soon of main hydraulic cylinder 3.Then according to technological requirement, that regulates proportional pressure control valve 1 opens pressure soon, makes it satisfy the pressure in the main chamber 31 of the required main hydraulic cylinder of design standard roll-force 3.When true roll-force surpasses the design standard roll-force, the force value that the pressure sensor 2 in main hydraulic cylinder 3 main chambeies 31 the shows force value that also is above standard.Proportional pressure control valve 1 receives the instruction that pressure sensor 2 transmits, and control its overflow valve and open, main hydraulic cylinder 3 main chamber 31 releases, roll deviates from the roll line direction operation, and rolling roll gap increases, and guarantees that rolled piece passes through smoothly, avoids device damage simultaneously.
In sum; The present invention is according to the tandem rolling tube machine technological requirement; With opening soon of proportional pressure control valve control main hydraulic cylinder, make the tandem rolling tube machine main hydraulic cylinder to open control loop soon more reasonable, perfect, greatly reduced commissioning staff's working strength and difficulty; Guarantee commissioning staff's personal safety, made debugging work become safer, simple, convenient.
Can know that by technological general knowledge the present invention can realize through other the embodiment that does not break away from its spirit or essential feature.Therefore, above-mentioned disclosed embodiment with regard to each side, all just illustrates, and is not only.All within the scope of the present invention or the change in being equal to scope of the present invention all comprised by the present invention.
Claims (1)
1. a tandem rolling tube machine main hydraulic cylinder is opened hydraulic control circuit soon; Comprise pressure sensor, principal pressure oil circuit, main oil return line; Said pressure sensor is installed on said principal pressure oil circuit; It is characterized in that, also comprise digital display pressure switch, proportional pressure control valve, said digital display pressure switch and said proportional pressure control valve are installed on said principal pressure oil circuit; Said pressure sensor is communicated by letter with being connected to control said proportional pressure control valve according to the pressure of said principal pressure oil circuit with said proportional pressure control valve and is opened, and the oil return opening of said proportional pressure control valve all is connected with said main oil return line with outer drain tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102305693A CN102343366A (en) | 2011-08-11 | 2011-08-11 | Quick-open hydraulic control loop of main hydraulic cylinder of mandrel pipe mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102305693A CN102343366A (en) | 2011-08-11 | 2011-08-11 | Quick-open hydraulic control loop of main hydraulic cylinder of mandrel pipe mill |
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| Publication Number | Publication Date |
|---|---|
| CN102343366A true CN102343366A (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102305693A Pending CN102343366A (en) | 2011-08-11 | 2011-08-11 | Quick-open hydraulic control loop of main hydraulic cylinder of mandrel pipe mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673602A (en) * | 2014-11-21 | 2016-06-15 | 大连华东液压件有限公司 | Proportional overflow valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6186020A (en) * | 1984-10-04 | 1986-05-01 | Kawasaki Steel Corp | Method and device for controlling rolling reduction of mandrel mill |
| DE3943388A1 (en) * | 1989-12-27 | 1991-07-04 | Mannesmann Ag | Hydraulic roller installation for exchange stand - has hydraulic cylinders with motion pick=up an servo-valves forming interchange unit operating without disconnecting control lines |
| JPH081223A (en) * | 1994-06-15 | 1996-01-09 | Mitsubishi Heavy Ind Ltd | Device for controlling hydraulic drawing down of rolling mill |
| CN101293260A (en) * | 2008-06-13 | 2008-10-29 | 中色科技股份有限公司 | Hydraulic control method and apparatus of combined hydraulic cylinder with bowed roll |
| CN101704037A (en) * | 2009-11-02 | 2010-05-12 | 一重集团大连设计研究院有限公司 | Hydraulic loop system for controlling roll gap of all-hydraulic flattening machine |
| CN101786107A (en) * | 2009-12-29 | 2010-07-28 | 太原重工股份有限公司 | Hydraulic control system for king roller quick-opening device of pipe mill |
-
2011
- 2011-08-11 CN CN2011102305693A patent/CN102343366A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6186020A (en) * | 1984-10-04 | 1986-05-01 | Kawasaki Steel Corp | Method and device for controlling rolling reduction of mandrel mill |
| DE3943388A1 (en) * | 1989-12-27 | 1991-07-04 | Mannesmann Ag | Hydraulic roller installation for exchange stand - has hydraulic cylinders with motion pick=up an servo-valves forming interchange unit operating without disconnecting control lines |
| JPH081223A (en) * | 1994-06-15 | 1996-01-09 | Mitsubishi Heavy Ind Ltd | Device for controlling hydraulic drawing down of rolling mill |
| CN101293260A (en) * | 2008-06-13 | 2008-10-29 | 中色科技股份有限公司 | Hydraulic control method and apparatus of combined hydraulic cylinder with bowed roll |
| CN101704037A (en) * | 2009-11-02 | 2010-05-12 | 一重集团大连设计研究院有限公司 | Hydraulic loop system for controlling roll gap of all-hydraulic flattening machine |
| CN101786107A (en) * | 2009-12-29 | 2010-07-28 | 太原重工股份有限公司 | Hydraulic control system for king roller quick-opening device of pipe mill |
Non-Patent Citations (2)
| Title |
|---|
| 张明等: "铸轧机辊缝自动控制系统", 《液压与气动》 * |
| 曹美忠: "钢管连轧机辊缝液压AGC控制系统咬钢过程研究", 《流体传动与控制》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673602A (en) * | 2014-11-21 | 2016-06-15 | 大连华东液压件有限公司 | Proportional overflow valve |
| CN105673602B (en) * | 2014-11-21 | 2018-11-06 | 大连华东液压件有限公司 | Proportional pressure control valve |
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Application publication date: 20120208 |