A gas-liquid combined control screed device

Abstract

The application discloses a kind of gas-liquid combination control's ironing roller device, including respectively being arranged in operating side and transmission side swing hydraulic cylinder and articulated setting in swing hydraulic cylinder movable end L-shaped swing arm, the swing hydraulic cylinder is connected with hydraulic control component, the connecting place of swing arm cross arm and vertical arm is rotatably provided with rotating shaft, rotating shaft rotatably arranged on external fixed frame is pressed by gas-liquid combination control ironing roller, realizes the coiling ironing of wide large aluminum strip rolling mill, swing hydraulic cylinder drives swing arm to swing around fixed rotating shaft, so that ironing roller approaches the surface of strip coil, when distance is less than the stroke of cylinder, again by cylinder, ironing roller is pressed on the surface of strip coil, solve the driving force problem of large weight ironing roller and its swing frame, while meet the tiny ironing force required when ironing roller ironing strip, guarantee the coiling tightness and flatness when aluminum strip thin material rolling, product quality has been promoted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metallurgical rolling equipment machine liquid control, in particular to a gas-liquid combined control flattening roller device. BACKGROUND

[0002] The flattening roller device is the key equipment for ensuring the tightness and flatness of the aluminum strip rolling, with the development of the wide and large aluminum strip rolling mill, the mechanical structure of the flattening roller and the swing frame is greatly increased in weight, the traditional air pressure control driving force is too small to drive the device, and the hydraulic control mode solves the problem of driving force but cannot meet the small flattening force required when the flattening roller flattens the strip. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the existing defects, provide a gas-liquid combined control flattening roller device, solve the driving force problem of the large weight flattening roller and the swing frame, meet the small flattening force required when the flattening roller flattens the strip, and ensure the tightness and flatness of the aluminum strip rolling, which can effectively solve the problems in the background art.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a gas-liquid combined control flattening roller device, comprising swing hydraulic cylinders arranged on the operation side and the transmission side respectively, and an L-shaped swing arm hingedly arranged on the movable end of the swing hydraulic cylinder, the swing hydraulic cylinder is connected with a hydraulic control assembly, a rotating shaft is rotatably arranged at the connection of the horizontal arm and the vertical arm of the swing arm, the rotating shaft is rotatably arranged on an external fixed frame, the movable end of the swing arm is respectively provided with a cylinder arranged on the operation side and the transmission side, the cylinder is connected with a pneumatic control assembly, and the movable end of the cylinder is provided with a flattening roller.

[0005] As a preferred technical scheme of the present application, the hydraulic control assembly comprises an electromagnetic reversing valve, a servo valve, a hydraulic control check valve I, a hydraulic control check valve II and a hydraulic control check valve III, pressure oil P enters the P port of the servo valve through the hydraulic control check valve I, a positive electric signal is input to the servo valve to make the pressure oil in the P port enter the A port, then enter the piston rod cavity of the swing hydraulic cylinder through the hydraulic control check valve II, while the oil in the piston cavity of the swing hydraulic cylinder returns to the T port through the hydraulic control check valve III and the B port of the servo valve, the swing hydraulic cylinder piston rod retracts to pull the swing arm to swing in; a reverse electric signal is input to the servo valve to make the pressure oil in the P port enter the B port, then enter the piston cavity of the swing hydraulic cylinder through the hydraulic control check valve III, while the oil in the piston rod cavity of the swing hydraulic cylinder returns to the T port through the hydraulic control check valve II and the A port of the servo valve, the swing hydraulic cylinder piston rod extends to push the swing arm to return; the electromagnetic reversing valve controls the opening and closing of the hydraulic control check valve I, the hydraulic control check valve II and the hydraulic control check valve III, the electromagnetic reversing valve is electrified to make the P port and the B port communicate, the pressure oil reaches the external control port x of the hydraulic control check valve I, the hydraulic control check valve II and the hydraulic control check valve III from the B port, and the hydraulic control check valve I, the hydraulic control check valve II and the hydraulic control check valve III are opened; the electromagnetic valve is de-energized to make the B port and the T port communicate, the external control port x of the hydraulic control check valve I, the hydraulic control check valve II and the hydraulic control check valve III is connected to the leakage oil pipe L, the external control port is depressurized, the hydraulic control check valve I, the hydraulic control check valve II and the hydraulic control check valve III are closed, and the external leakage port y of the hydraulic control check valve I, the hydraulic control check valve II and the hydraulic control check valve III always leaks to the leakage oil pipe L; when the smoothing roller is overhauled or the servo valve is replaced, the electromagnetic reversing valve is de-energized to make the P port, the A port and the B port of the servo valve closed.

[0006] As a preferred technical scheme of the present application, the hydraulic control assembly further comprises a safety overflow valve arranged on the pipeline, when the diameter of the coiled strip continuously increases due to the loop winding caused by the loop fault or control failure, the overpressure oil in the piston rod cavity of the swing hydraulic cylinder overflows to the oil return pipe T through the safety overflow valve.

[0007] As a preferred technical scheme of the present application, the hydraulic control assembly further comprises an angle sensor arranged on the rotating shaft, when the smoothing roller works, the servo valve is closed-loop controlled with the angle sensor arranged on the rotating shaft, so that the distance between the smoothing roller and the surface of the coiled strip is kept relatively constant.

[0008] As a preferred technical scheme of the present application, the pneumatic control assembly comprises a pneumatic three-way joint connected with a gas source and a proportional pressure reducing valve I and a proportional pressure reducing valve II arranged on the control gas circuit, the proportional pressure reducing valve I controls the piston cavity pressure of the operating side cylinder, and the proportional pressure reducing valve II controls the piston cavity pressure of the transmission side cylinder.

[0009] As a preferred technical scheme of the present application, the pneumatic control assembly further comprises a constant pressure reducing valve arranged on the gas circuit, which sets a small back pressure for the cylinder piston rod cavities of the operation side and the transmission side, offsets a part of the piston cavity pressure to realize a smaller flattening force, and provides power for the retraction of the cylinder.

[0010] Compared with the prior art, the present application has the beneficial effects that: the wide large aluminum strip rolling mill is realized by the gas-liquid combined control of the flattening roller, the swing hydraulic cylinder drives the swing arm to swing around the fixed rotating shaft, the flattening roller approaches the surface of the strip coil, and when the distance is less than the stroke of the cylinder, the flattening roller is pressed on the surface of the strip coil by the cylinder, which solves the driving force problem of the large weight flattening roller and its swing frame, meets the small flattening force required when the flattening roller flattens the strip, guarantees the tightness and flatness of the aluminum strip during rolling, and improves the product quality. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structural schematic view of the present application;

[0012] Figure 2 is a hydraulic control schematic view of the flattening roller of the present application;

[0013] Figure 3 is a pneumatic control schematic view of the flattening roller of the present application.

[0014] In the figure: 1 electromagnetic reversing valve, 2 servo valve, 3 liquid control check valve I, 4 liquid control check valve II, 5 liquid control check valve III, 6 safety overflow valve, 7 angle sensor, 8 pneumatic three-way joint, 9 proportional pressure reducing valve I, 10 proportional pressure reducing valve II, 11 constant pressure reducing valve, 12 displacement sensor, 13 swing hydraulic cylinder, 14 swing arm, 15 rotating shaft, 16 cylinder, 17 flattening roller, 18 strip coil. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0016] Please refer to Figures 1-3The application provides a technical scheme: a gas-liquid combined control flatting roller device, which comprises swing hydraulic cylinders 13 arranged on an operation side and a transmission side respectively, an L-shaped swing arm 14 hingedly arranged at a movable end of the swing hydraulic cylinder 13, the swing hydraulic cylinder 13 is connected with a hydraulic control assembly, a rotating shaft 15 is arranged at the joint of a horizontal arm and a vertical arm of the swing arm 14, the rotating shaft 15 is rotatably arranged on an external fixed frame, when the swing hydraulic cylinder 13 drives the swing arm 14 to move, the swing arm 14 rotates around the rotating shaft 15, so that the movable end of the swing arm 14 approaches or moves away from a belt roll 18.

[0017] A cylinder 16 is arranged at the movable end of the swing arm 14 and arranged on the operation side and the transmission side respectively, the cylinder 16 is connected with a pneumatic control assembly, a flatting roller 17 is arranged at the movable end of the cylinder 16, the swing hydraulic cylinder 13 drives the swing arm 14 to swing around the fixed rotating shaft 15, so that the flatting roller 17 approaches the surface of the belt roll 18, when the distance is less than the stroke of the cylinder 16, the cylinder 16 is used to press the flatting roller 17 on the surface of the belt roll 18, the driving force problem of the flatting roller with large weight and the swing frame is solved, the small flattening force required when the flatting roller 17 flattens the belt is met, the coiling tightness and flatness during the rolling of the aluminum belt are ensured, and the product quality is improved.

[0018] The flatting roller is controlled by gas-liquid combination, so that the coiling and flattening of the wide and large aluminum belt rolling mill are realized.

[0019] The hydraulic control assembly comprises an electromagnetic reversing valve 1, a servo valve 2, a hydraulic control check valve I 3, a hydraulic control check valve II 4 and a hydraulic control check valve III 5. The pressure oil P enters the P port of the servo valve 2 through the hydraulic control check valve I 3. A positive electric signal is input into the servo valve 2, so that the pressure oil in the P port enters the A port, and then enters the piston rod cavity of the swing hydraulic cylinder 13 through the hydraulic control check valve II 4. At the same time, the oil in the piston cavity of the swing hydraulic cylinder 13 returns to the T port through the hydraulic control check valve III 5 and the B port of the servo valve 2. The piston rod of the swing hydraulic cylinder 13 is retracted to pull the swing arm 14 to swing in. When a reverse electric signal is input into the servo valve 2, the pressure oil in the P port enters the B port, and then enters the piston cavity of the swing hydraulic cylinder 13 through the hydraulic control check valve III 5. At the same time, the oil in the piston rod cavity of the swing hydraulic cylinder 13 returns to the T port through the hydraulic control check valve II 4 and the A port of the servo valve 2. The piston rod of the swing hydraulic cylinder 13 is extended to push the swing arm 14 to return. The electromagnetic reversing valve 1 controls the opening and closing of the hydraulic control check valve I 3, the hydraulic control check valve II 4 and the hydraulic control check valve III 5. When the electromagnetic reversing valve 1 is powered on, the P port and the B port are connected, the pressure oil reaches the external control port x of the hydraulic control check valve I 3, the hydraulic control check valve II 4 and the hydraulic control check valve III 5 from the B port, and the hydraulic control check valve I 3, the hydraulic control check valve II 4 and the hydraulic control check valve III 5 are opened. When the electromagnetic valve 1 is powered off, the B port and the T port are connected, the external control port x of the hydraulic control check valve I 3, the hydraulic control check valve II 4 and the hydraulic control check valve III 5 is connected to the leakage oil pipe L, the external control port is depressurized, the hydraulic control check valve I 3, the hydraulic control check valve II 4 and the hydraulic control check valve III 5 are closed, and the external leakage port y of the hydraulic control check valve I 3, the hydraulic control check valve II 4 and the hydraulic control check valve III 5 always leaks to the leakage oil pipe L. When the flatting roller 17 is repaired or the servo valve 2 is replaced, the control electromagnetic reversing valve 1 is powered off to close the P port, the A port and the B port of the servo valve 2.

[0020] The hydraulic control assembly further comprises a safety overflow valve 6 arranged on the pipeline. When the loop fails or the control fails, the diameter of the belt roll 18 increases, the piston rod cavity of the swing hydraulic cylinder 13 is over-pressurized, and the over-pressurized oil flows to the oil return pipe T through the safety overflow valve 6.

[0021] The hydraulic control assembly further comprises an angle sensor 7 arranged on the rotating shaft 15. When the flatting roller 17 works, the servo valve 2 is closed-loop controlled with the angle sensor 7 arranged on the rotating shaft 15, so that the distance between the flatting roller 17 and the surface of the belt roll 18 is kept relatively constant, and the control accuracy is improved.

[0022] The pneumatic control assembly comprises a pneumatic three-way joint 8 connected with a gas source, a proportional pressure reducing valve I 9 and a proportional pressure reducing valve II 10 arranged on the control gas circuit. The proportional pressure reducing valve I 9 controls the piston cavity pressure of the operating side cylinder 16, the proportional pressure reducing valve II 10 controls the piston cavity pressure of the transmission side cylinder 16, so as to control the movement of the flatting roller 17 driven by the cylinder 16.

[0023] Based on the surface condition of the material roll, different electrical signals are input to the proportional pressure reducing valve I9 ​​and the proportional pressure reducing valve II10 to adjust the piston chamber pressure of the pressing cylinder 16, thereby realizing the automatic control of the pressing force of the ironing roller 17.

[0024] Because the piston chamber pressure of the pressure cylinder 16 on the operating side and the transmission side is independently controlled by the proportional pressure reducing valve I9 ​​and the proportional pressure reducing valve II10, the tilt control of the ironing force on both sides can be realized, solving special winding conditions such as edge wrinkling.

[0025] In a further preferred embodiment, the pneumatic control assembly also includes a set-value pressure reducing valve 11 disposed in the air circuit. The set-value pressure reducing valve 11 sets a small back pressure in the piston rod chamber of the cylinder 16 on the operating side and the transmission side. This back pressure can offset part of the piston chamber pressure to achieve a smaller ironing force, while providing power for the retraction of the cylinder 16.

[0026] Furthermore, the pneumatic control assembly also includes a displacement sensor 12 located at the movable end of the operating side cylinder 16, used to detect the real-time position of the piston rod of the cylinder 16, preventing the piston rod from extending or retracting to the bottom and losing its adjustment function. The position signal is transmitted to the electrical control system to drive the servo valve 2 to adjust the surface distance between the ironing roller 17 and the belt roll 18.

[0027] The electrical components and valve assemblies used in this application are all commonly used parts and equipment in the prior art, and their specific structures and working principles are well-known technologies, and will not be described in detail here.

[0028] In specific implementation, please refer to the appendix. Figure 1 The structural schematic diagram shown illustrates the design of mechanical devices such as ironing rollers, swing arms, swing hydraulic cylinders, air cylinders, and rollers based on calculated force parameters and motion trajectories; see attached... Figure 2 The hydraulic control diagram shown illustrates the selection of hydraulic component specifications based on the pressure and flow parameters required for the swing hydraulic cylinder's operation, and the design of an integrated hydraulic valve assembly according to hydraulic principles; see attached... Figure 3 The pneumatic control diagram selects the specifications and models of pneumatic components and designs an integrated pneumatic valve group; the hydraulic valve group and the pneumatic valve group are connected to the hydraulic oil source and the compressed air source respectively, and the hydraulic valve group and the pneumatic valve group are connected to the swing hydraulic cylinder and the air cylinder of the mechanical device respectively by pipelines.

[0029] All parts not disclosed in this invention are prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas-liquid combination controlled screed device, characterized by: The hydraulic cylinder (13) and the L-shaped swing arm (14) are arranged on the operation side and the transmission side respectively, the swing arm (14) is hinged on the movable end of the hydraulic cylinder (13), the connecting position of the horizontal arm and the vertical arm of the swing arm (14) is rotatably provided with a rotating shaft (15), the rotating shaft (15) is rotatably arranged on an external fixed frame, the movable end of the swing arm (14) is respectively provided with a cylinder (16) arranged on the operation side and the transmission side, the cylinder (16) is connected with a pneumatic control assembly, and the movable end of the cylinder (16) is provided with a smoothing roller (17); The hydraulic control assembly comprises an electromagnetic reversing valve (1), a servo valve (2), a hydraulic control check valve I (3), a hydraulic control check valve II (4) and a hydraulic control check valve III (5), pressure oil P enters the P port of the servo valve (2) through the hydraulic control check valve I (3), a positive electric signal is input into the servo valve (2), the pressure oil in the P port enters the A port, then enters the piston rod cavity of the swing hydraulic cylinder (13) through the hydraulic control check valve II (4), meanwhile, the oil in the piston cavity of the swing hydraulic cylinder (13) returns to the T port through the hydraulic control check valve III (5) and the B port of the servo valve (2), the swing hydraulic cylinder (13) is pulled back to make the swing arm (14) swing in; a reverse electric signal is input into the servo valve (2), the pressure oil in the P port enters the B port, then enters the piston cavity of the swing hydraulic cylinder (13) through the hydraulic control check valve III (5), meanwhile, the oil in the piston rod cavity of the swing hydraulic cylinder (13) returns to the T port through the hydraulic control check valve II (4) and the A port of the servo valve (2), the swing hydraulic cylinder (13) is pushed out to make the swing arm (14) return; the electromagnetic reversing valve (1) controls the opening and closing of the hydraulic control check valve I (3), the hydraulic control check valve II (4) and the hydraulic control check valve III (5), the P port and the B port of the electromagnetic reversing valve (1) are communicated when the electromagnetic reversing valve (1) is powered on, the pressure oil reaches the external control port x of the hydraulic control check valve I (3), the hydraulic control check valve II (4) and the hydraulic control check valve III (5) from the B port, and the hydraulic control check valve I (3), the hydraulic control check valve II (4) and the hydraulic control check valve III (5) are opened; when the electromagnetic valve 1 is powered off, the B port and the T port are communicated, the external control port x of the hydraulic control check valve I (3), the hydraulic control check valve II (4) and the hydraulic control check valve III (5) is connected to the leakage oil pipe L, the external control port is depressurized, the hydraulic control check valve I (3), the hydraulic control check valve II (4) and the hydraulic control check valve III (5) are closed, and the external leakage port y of the hydraulic control check valve I (3), the hydraulic control check valve II (4) and the hydraulic control check valve III (5) always leaks to the leakage oil pipe L; when the smoothing roller (17) is repaired or the servo valve (2) is replaced, the electromagnetic reversing valve (1) is powered off to make the P port, the A port and the B port of the servo valve (2) closed. The pneumatic control assembly comprises a pneumatic triplex (8) connected with a gas source, and a proportional pressure reducing valve I (9) and a proportional pressure reducing valve II (10) arranged on a control gas path, the proportional pressure reducing valve I (9) controls the piston cavity pressure of the operating side cylinder (16), the proportional pressure reducing valve II (10) controls the piston cavity pressure of the transmission side cylinder (16), different electric signals are input to the proportional pressure reducing valve I (9) and the proportional pressure reducing valve II (10) according to the surface condition of the material roll, the pressure of the pressure material cylinder (16) is adjusted, so that the automatic control of the flattening roller (17) pressing force and the two-side flattening force inclination control are realized.

2. A gas-liquid combination controlled screed device according to claim 1, characterized in that The hydraulic control assembly further comprises a safety overflow valve (6) arranged on the pipeline, when the loop fails or the control fails and the diameter of the material roll (18) continuously increases, the overpressure of the piston rod cavity of the swing hydraulic cylinder (13) is caused, and the overpressure oil liquid is overflowed to the oil return pipe T by the safety overflow valve (6).

3. A gas-liquid combination controlled screed device according to claim 2, characterized in that: The hydraulic control assembly further comprises an angle sensor (7) arranged on the rotating shaft (15), when the flattening roller (17) works, the servo valve (2) and the angle sensor (7) arranged on the rotating shaft (15) are closed-loop controlled, so that the surface distance between the flattening roller (17) and the material roll (18) is kept relatively constant.

4. A gas-liquid combination controlled screed device according to claim 1, characterized in that: The pneumatic control assembly further comprises a constant pressure reducing valve (11) arranged on the gas path, the constant pressure reducing valve (11) sets a smaller back pressure for the piston rod cavities of the operating side and the transmission side cylinders (16), offsets a part of the piston cavity pressure, realizes a smaller flattening force, and provides power for the retraction of the cylinder (16).

5. A gas-liquid combination controlled screed device according to claim 4, characterized in that: The pneumatic control assembly further comprises a displacement sensor (12) arranged on the movable end of the operating side cylinder (16).

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