CN204842477U - Case pinch roll lift hydraulic circuit is rolled up to heat - Google Patents
Case pinch roll lift hydraulic circuit is rolled up to heat Download PDFInfo
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- CN204842477U CN204842477U CN201520549633.8U CN201520549633U CN204842477U CN 204842477 U CN204842477 U CN 204842477U CN 201520549633 U CN201520549633 U CN 201520549633U CN 204842477 U CN204842477 U CN 204842477U
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Abstract
The utility model discloses a case pinch roll lift hydraulic circuit is rolled up to heat, including the pinch roll hydraulic cylinder who is used for adjusting the pinch roll clearning between rolls, still including being used for the no pole cavity pressure of control, the flow, flow directn's no pole chamber control circuit, be used for control to have the pole cavity pressure, the flow, flow directn has a pole chamber control circuit, an inside control circuit for controlling no pole chamber control circuit with have a pole chamber control circuit, a pressure sensor I for measuring there is pole chamber pressure, a pressure sensor II for measuring no pole chamber pressure, the setting is at the inside displacement sensor who is used for measuring pinch roll pneumatic cylinder lift stroke of pinch roll hydraulic cylinder. The utility model discloses with a chamber of servovalve control pneumatic cylinder, the other chamber of pneumatic cylinder uses the relief pressure valve to keep the constant pressure, carries out pressure, position control's method to the pneumatic cylinder. Control circuit is simple, reliable, and control accuracy is high, can realize position control and pressure control ripple disable switching.
Description
Technical field
The utility model belongs to metallurgy industry field, relates to a kind of hydraulic circuit, is specifically related to a kind of Coil Box pinch roll raise-lower hydraulic circuit.
Background technology
After pinch roll is arranged in Coil Box, pinching and aligning for intermediate blank, for subsequent handling provides straight intermediate blank, ensures flying shear and the reliable and stable work of finishing mill.As shown in Figure 1, pinch roll is made up of top pinch roll 10, bottom pinch roll 11 and smoothing roll 12 in pinch roll operating mechanism.Bottom pinch roll 11 is fixed in frame, and top pinch roll 10 and smoothing roll 12 are controlled by pinch roll lifting hydraulic cylinder 8.In production process, by controlling pressure and the position of pinch roll lifting hydraulic cylinder 8, realizing Withdrawal roll pressure and controlling and position control, completing pinching and aligning of intermediate blank.
Concrete, after intermediate blank completes and batches in Coil Box, the intermediate blank of batching carries out uncoiling on cradle roll, and now pinch roll lifting hydraulic cylinder 8 adopts position control, is that workpiece thickness adds threading deviation by regulating the displacement of pinch roll lifting hydraulic cylinder 8 by intermesh determination; When strip steel head is by pinch roll, pinch roll lifting hydraulic cylinder adopts Stress control, and intermediate blank is sent into flying shear crop with stable speed, and now pinch roll mainly rises and pinches function; After intermediate blank crop completes, again pinch roll lifting hydraulic cylinder 8 is switched to position control, the roll gap of setting is that workpiece thickness adds an aligning deviation specified, now pinch roll mainly plays straightening function.
Existing Coil Box pinch roll raise-lower hydraulic circuit adoption rate reversal valve adds proportional pressure-reducing valve to realize controlling functions requirement, and switch fluctuation between Stress control and position control large, not steadily, control accuracy is low.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of and realizes Stress control and position control steadily switches, control accuracy is high Coil Box pinch roll raise-lower hydraulic circuit.
For achieving the above object, the utility model provides following technical scheme:
A kind of Coil Box pinch roll raise-lower hydraulic circuit, comprise for regulating the pinch roll lifting hydraulic cylinder pinching roller gap, it is characterized in that: also comprise for controlling pressure in rodless cavity, flow, the rodless cavity oil circuit control of flow direction, for controlling pressure in rod chamber, flow, the rod chamber oil circuit control of flow direction, for controlling the internal control oil circuit of rodless cavity oil circuit control and rod chamber oil circuit control, for measuring the pressure sensor I of rod chamber pressure, for measuring the pressure sensor II of rodless cavity pressure, be arranged on pinch roll raise-lower hydraulic cylinder interior for measuring the displacement transducer of pinch roll hydraulic cylinder lifting travel,
Described rodless cavity oil circuit control comprises servo valve and overflow valve, an actuator port A1 of described servo valve is connected with pinch roll lifting hydraulic cylinder rodless cavity, the oil-in of described servo valve is connected with outside oil-feed oil circuit, and described overflow valve is arranged between the actuator port A1 of described servo valve and rodless cavity;
Described rod chamber oil circuit control comprises the first reversal valve and pressure-reducing valve, the oil-in of described first reversal valve is connected with outside oil-feed oil circuit, an actuator port A2 of described first reversal valve is connected with rod chamber, and described pressure-reducing valve is arranged between described first reversal valve oil-in and outside oil-feed oil circuit;
Described internal control oil circuit comprises the second reversal valve, the first check valve, the second check valve, described first check valve is arranged between servo valve oil-in and outside oil-feed oil circuit, described second check valve is arranged between the actuator port A1 of servo valve and rodless cavity, described first check valve and the second check valve are equipped with the internal control oil-in I for controlling described first check valve and the second check valve valve opening and closing, the oil-in of described second reversal valve is connected with outside oil-feed oil circuit, and an actuator port B1 of described second reversal valve is connected with internal control oil-in I;
Described pressure sensor I is arranged between the actuator port A2 of the first reversal valve and rod chamber;
Described pressure sensor II is arranged between rodless cavity and overflow valve.
Further, described pressure-reducing valve is threeway proportional pressure-reducing valve or three-way pressure reducing valve.
Further, described first check valve and the second check valve are hydraulically-controlled type check valve.
The beneficial effects of the utility model are:
1, hydraulic circuit of the present utility model, adopts single chamber to control, and control hydraulic cylinder rodless cavity with an actuator port of servo valve, hydraulic cylinder rod chamber pressure-reducing valve provides constant pressure, and control stability is good, and precision is high.
2, hydraulic circuit described in the utility model, hydraulic cylinder rod chamber pressure-reducing valve provides constant pressure, the mechanical clearance of abatement apparatus, and the ripple disable realizing Stress control and position control switches.
3, hydraulic circuit described in the utility model, servo valve all arranges hydraulic control one-way valve before and after hydraulic fluid port, make hydraulic cylinder be parked in optional position, can effectively prevent due to operating personnel's error, and the equipment malfunction caused does the harm to personnel and device security.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and beneficial effect clearly, the utility model provides following accompanying drawing to be described:
Fig. 1 is pinch roll operating mechanism schematic diagram;
Fig. 2 is Coil Box pinch roll raise-lower hydraulic circuit schematic diagram of the present utility model.
Wherein: 1-pressure-reducing valve, 2-first reversal valve, 3-servo valve, 4a-first check valve, 4a-second check valve, 5-overflow valve, 6-second reversal valve, 7a-pressure sensor I, 7b-pressure sensor II, 8-pinch roll lifting hydraulic cylinder, 8a-rodless cavity, 8b-rod chamber, 9-position sensor, 10-top pinch roll, 11-bottom pinch roll, 12-smoothing roll, 13-frame, 14-pay-off roll.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
As shown in Figure 2, Coil Box pinch roll raise-lower hydraulic circuit of the present utility model, comprise for regulating the pinch roll lifting hydraulic cylinder 8 pinching roller gap, for controlling pressure in rodless cavity 8a, flow, the rodless cavity oil circuit control of flow direction, for controlling pressure in rod chamber 8b, flow, the rod chamber oil circuit control of flow direction, for controlling the internal control oil circuit of rodless cavity oil circuit control and rod chamber oil circuit control, for measuring pressure sensor I 7a of rod chamber pressure, for measuring pressure sensor II 7b of rodless cavity pressure, be arranged on pinch roll raise-lower hydraulic cylinder interior for measuring the displacement transducer 9 of pinch roll hydraulic cylinder lifting travel.
Described rodless cavity oil circuit control comprises servo valve 3 and overflow valve 5, an actuator port A1 of described servo valve is connected with rodless cavity 8a, the oil-in of described servo valve 3 is connected with outside oil-feed oil circuit, between the actuator port A1 that described overflow valve 5 is arranged on described servo valve 3 and rodless cavity 8a.
Described rod chamber oil circuit control comprises the first reversal valve 2 and pressure-reducing valve 1, the oil-in of described first reversal valve 2 is connected with outside oil-feed oil circuit, an actuator port A2 of described first reversal valve 2 is connected with pinch roll lifting hydraulic cylinder rod chamber 8b, and described pressure-reducing valve 1 is arranged between described first reversal valve oil-in and outside oil-feed oil circuit.
Described internal control oil circuit comprises the second reversal valve 6, first check valve 4a, second check valve 4b, described first check valve 4a is arranged between servo valve 3 oil-in and outside oil-feed oil circuit, described second check valve 4b is arranged between the actuator port A1 of servo valve 3 and rodless cavity 8a, described first check valve 4a and the second check valve 4b is equipped with the internal control oil-in I for controlling described first check valve 4a and the second check valve 4b valve opening and closing, the oil-in of described second reversal valve 6 is connected with outside oil-feed oil circuit, an actuator port B1 of described second reversal valve 6 is connected with internal control oil-in I,
Between the actuator port A2 that described pressure sensor I 7a is arranged on the first reversal valve 2 and rod chamber 8b; Described pressure sensor II 7b is arranged between rodless cavity 8a and overflow valve 5.
In the present embodiment, servo valve 3 adopts three-position four-way valve, and its Median Function adopts O type; First check valve 4a and the second check valve 4b is hydraulically-controlled type check valve; First reversal valve and the second reversal valve are two position four-way valves, and pressure-reducing valve is three-way pressure reducing valve.
Operation principle of the present utility model is:
When pinch roll stops or overhauling, pinch roll lifting hydraulic cylinder is at lowest order, and the P mouth of pressure-reducing valve 1 is communicated with A mouth, and the oil return inlet T of the first reversal valve is communicated with actuator port A2, and now, rod chamber 8b force value is 0; The actuator port B1 of the second reversal valve 6 is communicated with oil return inlet T, the first check valve 4a and the second check valve 4b valve closes, and servo valve 3 is in meta, and its all hydraulic fluid port does not communicate, and now, rodless cavity 8a force value is 0; Effectively prevent due to operating personnel's error, and the equipment malfunction caused does the harm to personnel and device security.
When pinch roll rises, control the second reversal valve 6, its oil inlet P is connected with actuator port B1, now, pressure oil enters the internal control oil-in I of the first check valve 4a and the second check valve 4b by actuator port B1, make the valve open of the first check valve 4a and the second check valve 4b, oil circuit between servo valve 3 and rodless cavity 8a is communicated with, servo valve 3 oil-in is communicated with outside oil-feed oil circuit, simultaneously, servo valve 3 obtains a positive control signal by controller, the oil inlet P of servo valve 3 is communicated with actuator port A1, pressure oil is successively from outside oil-feed oil circuit, first check valve 4a, servo valve 3 and the second check valve 4b enter rodless cavity 8a, under pressure oil effect, the piston of pinch roll lifting hydraulic cylinder 8 is moved to rod chamber 8b by rodless cavity 8a, rod chamber oil circuit control pressure increase everywhere, when exceeding the setting value of pressure-reducing valve 1, the actuator port A of pressure-reducing valve 1 is communicated with oil return inlet T, pressure oil flow back into oil returning tube T by the first reversal valve 2 and pressure-reducing valve 1.
When pinch roll declines, pressure oil enters rod chamber by pressure-reducing valve 1 and the first reversal valve 2, and the piston of pinch roll lifting hydraulic cylinder moves from rod chamber 8b to rodless cavity 8a under pressure oil effect; Now, control the second reversal valve 6, it is made to enter to have mouthful P to be connected with actuator port B1, first check valve 4a and the second check valve 4b valve open, the control signal that servo valve 3 is born one by one by controller, the actuator port A1 of servo valve 3 is communicated with the oil return inlet T of servo valve 3, and the pressure oil of rodless cavity 8a flow back into oil returning tube T by the second check valve 4b and servo valve 3.
When pinch roll drops into position control, pressure-reducing valve 1 sets a constant pressure value, controller controls the second reversal valve 6, its oil inlet P is connected with actuator port B1, first check valve 4a and the second check valve 4b valve open, the measured value feeding back in controller that displacement transducer 9 detects the displacement of pinch roll lifting hydraulic cylinder compares with setting value, if setting value is different with measured value, controller is by comparing the opening degree of the spool of actual value and set value calculation servo valve 3, make hydraulic cylinder towards the direction motion eliminating error, accurately can control the position of pinch roll lifting hydraulic cylinder 8.In process of production, when pinch roll drops into threading function, the intermesh determination of pinch roll is that workpiece thickness adds threading deviation; When pinch roll drops into straightening function, the intermesh determination of pinch roll is that workpiece thickness adds an aligning deviation specified.
When pinch roll drops into Stress control, pressure-reducing valve 1 sets a constant pressure value, make constant pressure in rod chamber 8b, this force value is measured by pressure sensor I 7a, pressure in rodless cavity 8a is controlled by servo valve 3, this force value is measured by pressure sensor II 7b, pressure and position control difference are: its controller is that the force value fed back according to pressure sensor II 7b and setting value compare, regulate the opening degree of servo valve 3 spool, and then the pressure in adjustment rodless cavity 8a, make its actual pressure value close towards setup pressure value, accurately can control the pressure in rodless cavity 8a.In addition, also by the pressure of detected pressures sensor I 7a and pressure sensor II 7b, calculating pinch roll pinches chucking power during intermediate blank.
Hydraulic circuit of the present utility model, adopts single chamber to control, and control hydraulic cylinder rodless cavity with an actuator port of servo valve, hydraulic cylinder rod chamber pressure-reducing valve provides constant pressure, and control stability is good, and precision is high; Hydraulic cylinder rod chamber pressure-reducing valve provides constant pressure, the mechanical clearance of abatement apparatus, and the ripple disable realizing Stress control and position control switches; Servo valve all arranges hydraulic control one-way valve before and after hydraulic fluid port, makes hydraulic cylinder be parked in optional position, can effectively prevent due to operating personnel's error, and the equipment malfunction caused does the harm to personnel and device security; Rodless cavity oil circuit control is provided with overflow valve, makes the pressure in pipeline remain on certain limit class, adds the security performance of oil circuit.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model by above preferred embodiment, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from the utility model claims limited range.
Claims (3)
1. a Coil Box pinch roll raise-lower hydraulic circuit, comprise for regulating the pinch roll lifting hydraulic cylinder pinching roller gap, it is characterized in that: also comprise for controlling pressure in rodless cavity, flow, the rodless cavity oil circuit control of flow direction, for controlling pressure in rod chamber, flow, the rod chamber oil circuit control of flow direction, for controlling the internal control oil circuit of rodless cavity oil circuit control and rod chamber oil circuit control, for measuring the pressure sensor I of rod chamber pressure, for measuring the pressure sensor II of rodless cavity pressure, be arranged on pinch roll raise-lower hydraulic cylinder interior for measuring the displacement transducer of pinch roll hydraulic cylinder lifting travel,
Described rodless cavity oil circuit control comprises servo valve and overflow valve, an actuator port A1 of described servo valve is connected with pinch roll lifting hydraulic cylinder rodless cavity, the oil-in of described servo valve is connected with outside oil-feed oil circuit, and described overflow valve is arranged between the actuator port A1 of described servo valve and rodless cavity;
Described rod chamber oil circuit control comprises the first reversal valve and pressure-reducing valve, the oil-in of described first reversal valve is connected with outside oil-feed oil circuit, an actuator port A2 of described first reversal valve is connected with rod chamber, and described pressure-reducing valve is arranged between described first reversal valve oil-in and outside oil-feed oil circuit;
Described internal control oil circuit comprises the second reversal valve, the first check valve, the second check valve, described first check valve is arranged between servo valve oil-in and outside oil-feed oil circuit, described second check valve is arranged between the actuator port A1 of servo valve and rodless cavity, described first check valve and the second check valve are equipped with the internal control oil-in I for controlling described first check valve and the second check valve valve opening and closing, the oil-in of described second reversal valve is connected with outside oil-feed oil circuit, and an actuator port B1 of described second reversal valve is connected with internal control oil-in I;
Described pressure sensor I is arranged between the actuator port A2 of the first reversal valve and rod chamber;
Described pressure sensor II is arranged between rodless cavity and overflow valve.
2. Coil Box pinch roll raise-lower hydraulic circuit according to claim 1, is characterized in that: described pressure-reducing valve is threeway proportional pressure-reducing valve or three-way pressure reducing valve.
3. Coil Box pinch roll raise-lower hydraulic circuit according to claim 1, is characterized in that: described first check valve and the second check valve are hydraulically-controlled type check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520549633.8U CN204842477U (en) | 2015-07-27 | 2015-07-27 | Case pinch roll lift hydraulic circuit is rolled up to heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520549633.8U CN204842477U (en) | 2015-07-27 | 2015-07-27 | Case pinch roll lift hydraulic circuit is rolled up to heat |
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| Publication Number | Publication Date |
|---|---|
| CN204842477U true CN204842477U (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520549633.8U Active CN204842477U (en) | 2015-07-27 | 2015-07-27 | Case pinch roll lift hydraulic circuit is rolled up to heat |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106424221A (en) * | 2016-12-19 | 2017-02-22 | 马钢(集团)控股有限公司 | Steel section straightener bottom pinch roller hydraulic drive system and controlling method thereof |
| CN106623508A (en) * | 2016-12-19 | 2017-05-10 | 马钢(集团)控股有限公司 | Upper roll hydraulic driving system for pinch rolls of section steel straightening machine and control method of upper roll hydraulic driving system |
| CN110340152A (en) * | 2019-07-31 | 2019-10-18 | 首钢京唐钢铁联合有限责任公司 | Tandem mills and its dam roll assembly, lift control system and method |
| CN110578725A (en) * | 2019-07-29 | 2019-12-17 | 中船第九设计研究院工程有限公司 | production line ground conveying pre-jacking system and load control method thereof |
| CN113877968A (en) * | 2020-07-01 | 2022-01-04 | 宝山钢铁股份有限公司 | Method for preventing width fixing machine from slipping |
-
2015
- 2015-07-27 CN CN201520549633.8U patent/CN204842477U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106424221A (en) * | 2016-12-19 | 2017-02-22 | 马钢(集团)控股有限公司 | Steel section straightener bottom pinch roller hydraulic drive system and controlling method thereof |
| CN106623508A (en) * | 2016-12-19 | 2017-05-10 | 马钢(集团)控股有限公司 | Upper roll hydraulic driving system for pinch rolls of section steel straightening machine and control method of upper roll hydraulic driving system |
| CN110578725A (en) * | 2019-07-29 | 2019-12-17 | 中船第九设计研究院工程有限公司 | production line ground conveying pre-jacking system and load control method thereof |
| CN110340152A (en) * | 2019-07-31 | 2019-10-18 | 首钢京唐钢铁联合有限责任公司 | Tandem mills and its dam roll assembly, lift control system and method |
| CN113877968A (en) * | 2020-07-01 | 2022-01-04 | 宝山钢铁股份有限公司 | Method for preventing width fixing machine from slipping |
| CN113877968B (en) * | 2020-07-01 | 2023-12-12 | 宝山钢铁股份有限公司 | Method for preventing slipping of width-fixing machine |
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