CN203140446U - Hydraulic control system for rolls of continuous mill - Google Patents
Hydraulic control system for rolls of continuous mill Download PDFInfo
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- CN203140446U CN203140446U CN 201320078005 CN201320078005U CN203140446U CN 203140446 U CN203140446 U CN 203140446U CN 201320078005 CN201320078005 CN 201320078005 CN 201320078005 U CN201320078005 U CN 201320078005U CN 203140446 U CN203140446 U CN 203140446U
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- oil path
- valve
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- roll
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Abstract
The utility model belongs to the field of seamless steel tube production equipment and particularly relates to a hydraulic control system for rolls of a continuous mill. The hydraulic control system for the rolls of the continuous mill is capable of achieving a roll clamping function and a roll gap adjustment function of a traditional hydraulic system, and is simpler in principle. The goal that the same effect is achieved by fewest hydraulic components is achieved by the hydraulic control system for the rolls of the continuous mill, and therefore, the failure rate is also reduced while the cost is reduced, and the accuracy of roll gap adjustment is improved. The hydraulic control system for the rolls of the continuous mill comprises a roll locking circuit and a roll gap adjustment balancing circuit, and is characterized in that the roll locking circuit comprises locking cylinders. The locking cylinders are connected with a pressure relay, a stacked unidirectional throttle valve, a stacked reducing valve, a three-position four-way electromagnetic directional valve and an oil inlet/outlet of a locking manifold block in sequence by a hydraulic pipeline to form a hydraulic control circuit; the roll gap adjustment balancing circuit comprises balancing cylinders. The balancing cylinders are connected with a pressure relay, a stacked balancing valve, a stacked unidirectional throttle valve, a three-position four-way electromagnetic directional valve and an oil inlet/outlet of a balancing manifold block in sequence by a hydraulic pipeline to form a hydraulic control circuit.
Description
Technical field
The utility model belongs to the seamless steel pipe production field, is specifically related to a kind of hydraulic control system of continuous rolling mill roller.
Background technology
At modern seamless steel pipe continuous rolling production line, MPM tandem rolling unit is one of visual plant of producing in seamless steel pipe, it is made up of some groups of flat rolls and edging roll, continuous rolling mill roller is under the acting in conjunction of locking cylinder and compensating cylinder when rolling, need guarantee that roll is compacted, roll is unstable when avoiding rolling shakes, and guarantees rolling stability; In the operation of rolling, need carry out technology adjustment such as " roll replacing ", " roller gap adjustment ".
The hydraulic control system schematic diagram of existing continuous rolling mill roller as shown in Figure 1, it comprises that roll locking loop, roller gap adjust the balanced loop.Described roll locking loop forms hydraulic control circuit by locking cylinder 8, pressure switch 5, stacked unidirectional throttle valve 2-1, stacked compression release valve 6, two four-way electromagnetic reversing valve 9-1, locking oil path block and hydraulic oil pipes; Described roller gap is adjusted the balanced loop, forms hydraulic control circuit by compensating cylinder 7, pressure switch 5, board-like pressure-reducing valve 12, pressure-reducing valve oil path block 14, superposing type overflow valve 11, stacked unidirectional throttle valve 2-2, two four-way electromagnetic reversing valve 9-2, two four-way electromagnetic reversing valves 10, balance oil path block and hydraulic oil pipes; Described locking oil path block and balance oil path block are whole oil path block 13.
Operation principle is as follows:
Adjust the outlet pressure of stacked compression release valve 6, superposing type overflow valve 11, board-like pressure-reducing valve 12, make it satisfy roll coupling mechanism force and equilibrant force requirement; Adjust the opening degree of stacked unidirectional throttle valve 2-1,2-2, with the speed of service of control locking cylinder 8 and compensating cylinder 7.When roller gap is adjusted, the a of two four-way electromagnetic reversing valve 9-1 holds in the roll locking loop, after locking cylinder 8 withdrawal piston rods are opened roll, roller gap is adjusted two four-way electromagnetic reversing valve 9-2 in the balanced loop, the b of two four-way electromagnetic reversing valves 10 end simultaneously, compensating cylinder 7 stretches out piston rod locking roll, after treating that pressure switch 5 sends actuating signal, the b of two four-way electromagnetic reversing valve 9-2 end continues, and a of two four-way electromagnetic reversing valves 10 end begins, this moment, roll was under the effect of roll-separating mechanism, begin to drive roll gap toward the direction motion of roll balance cylinder 7 piston rods withdrawal, compensating cylinder 7 piston rods both had been subjected to the equilibrant force of superposing type overflow valve 11 in the loop, also be subjected to the reaction force from roll, the roll reaction force is greater than roll balance cylinder equilibrant force, roll drive this moment compensating cylinder piston rod begins progressively to withdraw, and stops action after roller gap arrives the technique initialization value.After the roller gap adjustment finishes, the b of two four-way electromagnetic reversing valve 9-1 holds in the roll locking loop, locking cylinder 8 stretches out piston rod locking roll, pressure switch 5 sends actuating signal, the b end of two four-way electromagnetic reversing valve 9-2 and two four-way electromagnetic reversing valves 10 all gets in the roller gap adjustment balanced loop, compensating cylinder 7 pressurizes locking roll, pressure switch 5 sends actuating signal, and the rolling of steel pipe carried out in the compacted roll entry into service under the effect of drive motors in back of adjusting to the right place.
When changing roll, the a of two four-way electromagnetic reversing valve 9-1 holds in the roll locking loop, locking cylinder 8 withdrawal piston rods are opened roll, simultaneously roller gap adjust a end of two four-way electromagnetic reversing valve 9-2 in the balanced loop, two four-way electromagnetic reversing valves 10 the b end simultaneously, compensating cylinder 7 withdrawal piston rods, after treating that locking cylinder 8, compensating cylinder 7 piston rods are all withdrawn and put in place, begin to change continuous rolling mill roller.
In the control principle of prior art, roller gap is adjusted the balanced loop and is made of its complex structure a plurality of different valves and oil path block, control complicated, cause whole hydraulic control system complex structure, thereby cause hydraulic valve platform structure and size bigger, fluid pressure line takies the device space; In addition, when roller gap was adjusted, the roll locking cylinder was in open mode, and flat roll is walked about under the effect of roll-separating mechanism easily outward, and the locking contact-making surface of roll exceeds the effect stroke of roll locking cylinder, caused the roll cylinder that can't be locked to pin.
Summary of the invention
The problems referred to above at the hydraulic control existence that has continuous rolling mill roller now, the utility model provides a kind of hydraulic control system of continuous rolling mill roller, it can reach outside the function that roll is locked and roller gap is adjusted of conventional hydraulic, hydraulic system principle of the present utility model is simpler, realized that the Hydraulic Elements with minimum reach the purpose of same effect, reduce cost and also reduced fault rate simultaneously, improved the degree of accuracy that roller gap is adjusted.
A kind of hydraulic control system of continuous rolling mill roller, its technical scheme is such: it comprises roll locking loop and roller gap adjustment balanced loop, it is characterized in that: described roll locking loop comprises locking cylinder, and described locking cylinder forms hydraulic control circuit by the oil inlet and outlet that fluid pressure line connects pressure switch, stacked unidirectional throttle valve, stacked compression release valve, 3-position 4-way solenoid directional control valve, described locking oil path block successively; Described roller gap is adjusted the balanced loop and is comprised compensating cylinder, and described compensating cylinder forms hydraulic control circuit by the oil inlet and outlet that fluid pressure line connects pressure switch, superposing type balanced valve, stacked unidirectional throttle valve, 3-position 4-way solenoid directional control valve, described balance oil path block successively.
It is further characterized in that, in the described roll locking loop, described locking oil path block is processed with P, T, A, B oil passage, form main P on described locking oil path block surface, main T, P, T, A, B, A1, the B1 oilhole, described stacked unidirectional throttle valve, stacked compression release valve, the 3-position 4-way solenoid directional control valve superposes successively according to the order on from descending and is installed in described locking oil path block P, T, A, on the B oilhole face, described stacked unidirectional throttle valve, stacked compression release valve, the P of 3-position 4-way solenoid directional control valve, T, A, P on B oil through and the described locking oil path block, T, A, the B oilhole is stack connection successively respectively, A1 on the described locking oil path block, the B1 oilhole connects rodless cavity and the rod chamber of described locking cylinder, main P on the described locking oil path block respectively by hydraulic oil pipe, main T oilhole is connected with pumping source; Described roller gap is adjusted in the balanced loop, described balance oil path block is processed with described P, T, A, B oil passage, form main P on described balance oil path block surface, main T, P, T, A, B, A2, the B2 oilhole, described superposing type balanced valve, stacked unidirectional throttle valve, the 3-position 4-way solenoid directional control valve superposes successively according to the order on from descending and is installed in described balance oil path block P, T, A, on the B oilhole face, described superposing type balanced valve, stacked unidirectional throttle valve, the P of 3-position 4-way solenoid directional control valve, T, A, P on B oil through and the described balance oil path block, T, A, the B oilhole is stack connection successively respectively, A2 on the described balance oil path block, the B2 oilhole connects rodless cavity and the rod chamber of described compensating cylinder, main P on the described balance oil path block respectively by described hydraulic oil pipe, main T oilhole is connected with pumping source; Be respectively arranged with described pressure switch on the A2 oil passage of described locking oil path block A1 and described balance oil path block; Described locking oil path block and the machine-shaping of described balance oil path block one, the main P chamber of described locking oil path block and described balance oil path block communicates, and main T chamber communicates.
The utility model compared with prior art, be provided with 3-position 4-way solenoid directional control valve and superposing type balanced valve and replaced board-like pressure-reducing valve in the prior art, the superposing type overflow valve, two four-way electromagnetic reversing valves etc., reduce hydraulic valve platform and fluid pressure line and take the too many device space, control simple and reliable, can realize having now the hydraulic control requirement of continuous rolling mill roller when greatly reducing the maintenance requirement of continuous rolling mill roller control and cost, and the superposing type balanced valve had both been eliminated in the edging roll gap of screw mandrel in the roll-separating mechanism, guarantee that again roll balance cylinder rodless cavity hydraulic oil forms the pressure that one and the deadweight of last flat roll body balance each other, thereby guaranteed flat roll, edging roll roll gap adjusted value accurate overcome the low defective of the degree of accuracy that roller gap is adjusted in the prior art.
Description of drawings
Fig. 1 is the hydraulic control schematic diagram of prior art;
Fig. 2 is hydraulic control schematic diagram of the present utility model.
The specific embodiment
See shown in Figure 2, a kind of hydraulic control system of continuous rolling mill roller, it comprises roll locking loop and roller gap adjustment balanced loop, roll locking loop comprises locking cylinder 8, and locking cylinder 8 forms hydraulic control circuit by the oil inlet and outlet that fluid pressure line connects pressure switch 5-1, stacked unidirectional throttle valve 2-1, stacked compression release valve 6,3-position 4-way solenoid directional control valve 1-1, locking oil path block 4 successively; Roller gap is adjusted the balanced loop and is comprised compensating cylinder 7, and compensating cylinder 7 forms hydraulic control circuit by the oil inlet and outlet that fluid pressure line connects pressure switch 5-2, superposing type balanced valve 3, stacked unidirectional throttle valve 2-2,3-position 4-way solenoid directional control valve 1-2, balance oil path block 15 successively; In the roll locking loop, locking oil path block 4 is processed with P, T, A, B oil passage, form main P on locking oil path block 4 surfaces, main T, P, T, A, B, A1, the B1 oilhole, stacked unidirectional throttle valve 2-1, stacked compression release valve 6,3-position 4-way solenoid directional control valve 1-1 superposes successively according to the order on from descending and is installed in the P of locking oil path block 4, T, A, on the B oilhole face, stacked unidirectional throttle valve 2-1, stacked compression release valve 6, the P of 3-position 4-way solenoid directional control valve 1-1, T, A, P on B oil through and the locking oil path block 4, T, A, the B oilhole is stack connection successively respectively, A1 on the locking oil path block 4, the B1 oilhole connects rodless cavity and the rod chamber of locking cylinder 8 respectively by hydraulic oil pipe, main P on the locking oil path block 4, main T oilhole is connected with pumping source; Roller gap is adjusted in the balanced loop, balance oil path block 15 is processed with P, T, A, B oil passage, form main P on balance oil path block 15 surfaces, main T, P, T, A, B, A2, the B2 oilhole, superposing type balanced valve 3, stacked unidirectional throttle valve 2-2,3-position 4-way solenoid directional control valve 1-2 superposes successively according to the order on from descending and is installed in the P of balance oil path block 15, T, A, on the B oilhole face, superposing type balanced valve 3, stacked unidirectional throttle valve 2-2, the P of 3-position 4-way solenoid directional control valve 1-2, T, A, P on B oil through and the balance oil path block, T, A, the B oilhole is stack connection successively respectively, A2 on the balance oil path block 15, the B2 oilhole connects rodless cavity and the rod chamber of compensating cylinder 7, main P on the balance oil path block 15 respectively by hydraulic oil pipe, main T oilhole is connected with pumping source; Be respectively arranged with pressure switch 5-1,5-2 on the A2 oil passage of the A1 of locking oil path block 4 and balance oil path block 15; Locking oil path block 4 and the 15 one machine-shapings of balance oil path block, the main P chamber of locking oil path block and described balance oil path block communicates, and main T chamber communicates.Wherein, in the roll locking loop, stacked compression release valve 6 is the decompression of P chamber, and 3-position 4-way solenoid directional control valve 1-1,1-2 slide valve function are the J type, and pressure switch 5-1 detected pressures is the A1 oil passage on the locking oil path block 4; Roller gap is adjusted in the balanced loop, and superposing type balanced valve 3 is A chamber balance, and 3-position 4-way solenoid directional control valve 1-2 slide valve function is the J type, and pressure switch 5-2 detected pressures is the A2 oil passage on the balance oil path block 15.
Operation principle is as described below: adjust the outlet pressure of stacked compression release valve 6, superposing type balanced valve 3, make it satisfy roll coupling mechanism force and equilibrant force requirement; Adjust the opening degree of stacked unidirectional throttle valve 2-1,2-2, with the speed of service of control locking cylinder 8 and compensating cylinder 7.When roller gap is adjusted, the a of 3-position 4-way solenoid directional control valve 1-1 in the roll locking loop, b holds equal dead electricity, locking cylinder 8 piston rods float and contact roll, the b end that roller gap is adjusted 3-position 4-way solenoid directional control valve 1-2 in the balanced loop gets earlier, compensating cylinder 7 stretches out piston rod locking roll, after treating that pressure switch 5-2 sends actuating signal, the a of 3-position 4-way solenoid directional control valve 1-2, b holds equal dead electricity, this moment, roll was under the effect of roll-separating mechanism, begin to drive roll gap toward the direction motion of roll balance cylinder 7 piston rods withdrawal, compensating cylinder 7 piston rods both had been subjected to the equilibrant force of superposing type balanced valve 3 in the loop, also be subjected to the reaction force from the roll self gravitation, the roll reaction force is greater than roll balance cylinder 7 equilibrant force, roll drive this moment compensating cylinder 7 piston rods begin progressively to withdraw, and stop action after roller gap arrives the technique initialization value.After the roller gap adjustment finishes, the b of 3-position 4-way solenoid directional control valve 1-1 holds in the roll locking loop, locking cylinder 8 stretches out piston rod locking roll, pressure switch 5-1 sends actuating signal, b that roller gap is adjusted 3-position 4-way solenoid directional control valve 1-2 in the balanced loop holds, compensating cylinder 7 pressurizes locking roll, pressure switch 5-2 sends actuating signal, and the rolling of steel pipe carried out in the compacted roll entry into service under the effect of drive motors in back of adjusting to the right place.
When changing roll, the a of 3-position 4-way solenoid directional control valve 1-1 holds in the roll locking loop, locking cylinder 8 withdrawal piston rods are opened roll, simultaneously roller gap adjust 3-position 4-way solenoid directional control valve 1-2 in the balanced loop a end simultaneously, compensating cylinder 7 withdrawal piston rods, after treating that locking cylinder 8, compensating cylinder 7 piston rods are all withdrawn and put in place, begin to change continuous rolling mill roller.
In control system of the present utility model, when the effect of superposing type balanced valve 3 is the roller gap adjustment, roll drives compensating cylinder 7 piston rods to begin progressively to withdraw, by adjusting superposing type balanced valve 3 equalizing pressures, both eliminated in the edging roll gap of screw mandrel in the roll-separating mechanism, guarantee that again roll balance cylinder 7 rodless cavity hydraulic oil form the pressure that one and the deadweight of last flat roll body balance each other, thereby guaranteed flat roll, edging roll roll gap adjusted value accurate, also reduced to realizing the kind of the selected hydraulic valve of said function, realized that the Hydraulic Elements with minimum reach the purpose of same effect.
Claims (5)
1. the hydraulic control system of a continuous rolling mill roller, its technical scheme is such: it comprises roll locking loop and roller gap adjustment balanced loop, it is characterized in that: described roll locking loop comprises locking cylinder, and described locking cylinder forms hydraulic control circuit by the oil inlet and outlet that fluid pressure line connects pressure switch, stacked unidirectional throttle valve, stacked compression release valve, 3-position 4-way solenoid directional control valve, described locking oil path block successively; Described roller gap is adjusted the balanced loop and is comprised compensating cylinder, and described compensating cylinder forms hydraulic control circuit by the oil inlet and outlet that fluid pressure line connects pressure switch, superposing type balanced valve, stacked unidirectional throttle valve, 3-position 4-way solenoid directional control valve, described balance oil path block successively.
2. the hydraulic control system of continuous rolling mill roller according to claim 1, it is characterized in that: in the described roll locking loop, described locking oil path block is processed with P, T, A, B oil passage, form main P on described locking oil path block surface, main T, P, T, A, B, A1, the B1 oilhole, described stacked unidirectional throttle valve, stacked compression release valve, the 3-position 4-way solenoid directional control valve superposes successively according to the order on from descending and is installed in described locking oil path block P, T, A, on the B oilhole face, described stacked unidirectional throttle valve, stacked compression release valve, the P of 3-position 4-way solenoid directional control valve, T, A, P on B oil through and the described locking oil path block, T, A, the B oilhole is stack connection successively respectively, A1 on the described locking oil path block, the B1 oilhole connects rodless cavity and the rod chamber of described locking cylinder, main P on the described locking oil path block respectively by described hydraulic oil pipe, main T oilhole is connected with pumping source.
3. the hydraulic control system of continuous rolling mill roller according to claim 1, it is characterized in that: described roller gap is adjusted in the balanced loop, described balance oil path block is processed with described P, T, A, B oil passage, form main P on described balance oil path block surface, main T, P, T, A, B, A2, the B2 oilhole, described superposing type balanced valve, stacked unidirectional throttle valve, the 3-position 4-way solenoid directional control valve superposes successively according to the order on from descending and is installed in described balance oil path block P, T, A, on the B oilhole face, described superposing type balanced valve, stacked unidirectional throttle valve, the P of 3-position 4-way solenoid directional control valve, T, A, P on B oil through and the described balance oil path block, T, A, the B oilhole is stack connection successively respectively, A2 on the described balance oil path block, the B2 oilhole connects rodless cavity and the rod chamber of described compensating cylinder, main P on the described balance oil path block respectively by described hydraulic oil pipe, main T oilhole is connected with pumping source.
4. according to the hydraulic control system of claim 2 or 3 described continuous rolling mill rollers, it is characterized in that: be respectively arranged with described pressure switch on the A2 oil passage of described locking oil path block A1 and described balance oil path block.
5. according to the hydraulic control system of claim 2 or 3 described continuous rolling mill rollers, it is characterized in that: described locking oil path block and the machine-shaping of described balance oil path block one, the main P chamber of described locking oil path block and described balance oil path block communicates, and main T chamber communicates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320078005 CN203140446U (en) | 2013-02-20 | 2013-02-20 | Hydraulic control system for rolls of continuous mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320078005 CN203140446U (en) | 2013-02-20 | 2013-02-20 | Hydraulic control system for rolls of continuous mill |
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| CN203140446U true CN203140446U (en) | 2013-08-21 |
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| CN 201320078005 Expired - Fee Related CN203140446U (en) | 2013-02-20 | 2013-02-20 | Hydraulic control system for rolls of continuous mill |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138535A (en) * | 2017-04-13 | 2017-09-08 | 江苏理工学院 | A kind of novel rolling mill press down system |
| CN109834115A (en) * | 2017-11-29 | 2019-06-04 | 中冶宝钢技术服务有限公司 | A kind of rolling mill hydraulic piping foundation method |
| CN109838423A (en) * | 2017-11-27 | 2019-06-04 | 江苏华澳橡胶机械有限公司 | Mechanical hand hydraulic circuit, the method and vulcanizer for eliminating manipulator balanced valve hidden danger |
| CN109894484A (en) * | 2019-04-02 | 2019-06-18 | 中冶赛迪工程技术股份有限公司 | A kind of pipe-mill roll calibration hydraulic control system and device |
-
2013
- 2013-02-20 CN CN 201320078005 patent/CN203140446U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138535A (en) * | 2017-04-13 | 2017-09-08 | 江苏理工学院 | A kind of novel rolling mill press down system |
| CN109838423A (en) * | 2017-11-27 | 2019-06-04 | 江苏华澳橡胶机械有限公司 | Mechanical hand hydraulic circuit, the method and vulcanizer for eliminating manipulator balanced valve hidden danger |
| CN109838423B (en) * | 2017-11-27 | 2024-04-30 | 华澳装备科技(盐城)有限公司 | Manipulator hydraulic loop, method for eliminating hidden danger of balance valve of manipulator and vulcanizing machine |
| CN109834115A (en) * | 2017-11-29 | 2019-06-04 | 中冶宝钢技术服务有限公司 | A kind of rolling mill hydraulic piping foundation method |
| CN109894484A (en) * | 2019-04-02 | 2019-06-18 | 中冶赛迪工程技术股份有限公司 | A kind of pipe-mill roll calibration hydraulic control system and device |
| CN109894484B (en) * | 2019-04-02 | 2024-02-23 | 中冶赛迪工程技术股份有限公司 | Hydraulic control system and device for roller calibration of steel tube rolling mill |
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