CN113864260B - Hydraulic control device of lifting oil cylinder of stepping heating furnace - Google Patents
Hydraulic control device of lifting oil cylinder of stepping heating furnace Download PDFInfo
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- CN113864260B CN113864260B CN202110976149.3A CN202110976149A CN113864260B CN 113864260 B CN113864260 B CN 113864260B CN 202110976149 A CN202110976149 A CN 202110976149A CN 113864260 B CN113864260 B CN 113864260B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 48
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 82
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000013519 translation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic control device of a stepping heating furnace lifting cylinder, which comprises a closed loop control system and an open loop control system, wherein the closed loop control system comprises a locking device, a left lifting cylinder control loop and a right lifting cylinder control loop which are connected with the output end of an industrial personal computer, and two piston rod displacement sensors which are connected with the input end of the industrial personal computer and are respectively arranged on a left stepping beam lifting cylinder and a right stepping beam lifting cylinder of the stepping heating furnace, the left lifting cylinder control loop and the right lifting cylinder control loop are respectively connected with the left stepping beam lifting cylinder and the right stepping beam lifting cylinder of the stepping heating furnace through the locking device, and the open loop control system is connected with the left stepping beam lifting cylinder and the right stepping beam lifting cylinder of the stepping heating furnace. According to the invention, two sets of hydraulic control systems are adopted to control the lifting oil cylinder, when one set of hydraulic control system fails, the other set of hydraulic control system can be started immediately without stopping, so that the influence of the failure of the hydraulic system on production is reduced, and the stability and reliability of steel rolling equipment are improved.
Description
Technical Field
The invention relates to a hydraulic control device for left and right walking beam lifting cylinders of a walking heating furnace, and belongs to the technical field of hydraulic pressure.
Background
The hot rolling of plates, bars or wires is widely carried out in-furnace conveying and heating of cold or hot billets by a step-by-step heating furnace. Continuously cast billets are intermittently fed into the furnace by a furnace feeding roller way, a furnace bottom stepping mechanism (a stepping beam) supports the billets to do repeated stepping motion, the billets reach the temperature required by rolling after being subjected to tens of steps of stepping motion in the furnace, and the billets are fed to a continuous rolling mill for rolling by a furnace discharging roller way. The step-by-step heating furnace generally adopts two step Liang Shengjiang oil cylinders, and one step beam translation oil cylinder repeatedly and alternately works to finish step-by-step conveying of billets. The existing lifting hydraulic device of the stepping heating furnace has the following problems:
1. in order to improve the running stability and safety of the stepping mechanism of the stepping furnace, more and more hydraulic elements and electric elements in a hydraulic system are added, the increase of the hydraulic elements and the electric elements tends to increase the failure rate of the heating furnace, and once the heating furnace fails, the difficulty of searching the failure is relatively high, and a lot of time is spent for finding and removing the failure. This directly affects the normal operation of production.
2. The two walking beam lifting cylinders of the walking heating furnace are synchronous by adopting the walking beams, the hydraulic system is not provided with a hydraulic synchronous design, so that the walking beams are stressed unevenly and are easy to deform and damage after running for a period of time, and the beams occupy a large amount of production time during step change, so that great loss is brought to enterprises.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a hydraulic control device of a lifting cylinder of a stepping heating furnace, so as to reduce the influence of hydraulic system fault maintenance on hot rolling production, ensure the normal operation of hydraulic equipment and improve the stability and reliability of steel rolling equipment.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the hydraulic control device of the step heating furnace lifting cylinder comprises a closed loop control system and an open loop control system, wherein the closed loop control system comprises a locking device connected with the output end of an industrial personal computer, a left lifting cylinder control loop, a right lifting cylinder control loop and two piston rod displacement sensors connected with the input end of the industrial personal computer and respectively arranged on a left stepping beam lifting cylinder and a right stepping beam lifting cylinder of the step heating furnace, the left lifting cylinder control loop and the right lifting cylinder control loop are respectively connected with the left stepping beam lifting cylinder and the right stepping beam lifting cylinder of the step heating furnace through the locking device, and the open loop control system is connected with the left stepping beam lifting cylinder and the right stepping beam lifting cylinder of the step heating furnace.
The hydraulic control device of the lifting oil cylinder of the step heating furnace, wherein the left lifting oil cylinder control loop comprises a left proportional reversing valve, the P port of the left proportional reversing valve is connected with pressure oil, the T port is connected with an oil return pipe, and the A port and the B port are respectively connected with a rodless cavity and a rod-containing cavity of a left walking beam lifting oil cylinder of the step heating furnace through locking devices; the control loop of the right lifting oil cylinder comprises a right proportional reversing valve, a P port of the right proportional reversing valve is connected with pressure oil, a T port of the right proportional reversing valve is connected with an oil return pipe, an A port and a B port of the right proportional reversing valve are respectively connected with a rodless cavity and a rod cavity of a right walking beam lifting oil cylinder of the step heating furnace through locking devices, and control ends of the left proportional reversing valve and the right proportional reversing valve are connected with an output end of an industrial personal computer.
The hydraulic control device of the step heating furnace lifting oil cylinder is characterized in that the left lifting oil cylinder control loop further comprises a left shuttle valve and a left pressure compensator, two oil inlets of the left shuttle valve are respectively connected with an A port and a B port of a left proportional reversing valve, the left pressure compensator is connected in series on a high-pressure oil pipe connected with a P port of the left proportional reversing valve, and a pressure detection port of the left pressure compensator is connected with a working port of the left shuttle valve; the right lifting oil cylinder control loop further comprises a right shuttle valve and a right pressure compensator, wherein two oil inlets of the right shuttle valve are respectively connected with an A port and a B port of the right proportional reversing valve, the right pressure compensator is connected in series on a high-pressure oil pipe connected with a P port of the right proportional reversing valve, and a pressure detection port of the right pressure compensator is connected with a working port of the right shuttle valve.
The hydraulic control device of the step heating furnace lifting oil cylinder comprises a closed control reversing valve, a left first hydraulic control one-way valve, a left second hydraulic control one-way valve, a right first hydraulic control one-way valve and a right second hydraulic control one-way valve, wherein a P port of the closed control reversing valve is connected with pressure oil, a T port is connected with an oil drain pipe, and the left first hydraulic control one-way valve, the left second hydraulic control one-way valve, the right first hydraulic control one-way valve and the right second hydraulic control one-way valve are respectively connected with oil pipes connected with an A port and a B port of the left proportional reversing valve and an A port of the right proportional reversing valve in series, and control oil ports of the left hydraulic control one-way valve, the left second hydraulic control one-way valve, the right first hydraulic control one-way valve and the right second hydraulic control one-way valve are connected with the A port and the B port of the closed control reversing valve.
The hydraulic control device of the lifting oil cylinder of the stepping heating furnace comprises a locking device and a lifting control loop, wherein the lifting control loop comprises a proportional reversing valve, the P port of the proportional reversing valve is connected with pressure oil, the T port of the proportional reversing valve is connected with an oil return pipe, and the control end of the proportional reversing valve is connected with the output end of an industrial personal computer; the locking device comprises an opening control reversing valve, a right one-opening hydraulic control one-way valve, a right two-opening hydraulic control one-way valve, a right three-opening hydraulic control one-way valve and a right four-opening hydraulic control one-way valve, wherein a P port of the opening control reversing valve is connected with pressure oil, a T port of the opening control reversing valve is connected with an oil drain pipe, A ports and B ports of the opening control reversing valve are connected with control oil ports of the right one-opening hydraulic control one-way valve, the right two-opening hydraulic control one-way valve, the right three-opening hydraulic control one-way valve and the right four-opening hydraulic control one-way valve, one ends of the right one-opening hydraulic control one-way valve and the right two-opening hydraulic control one-way valve are connected with an A port of the proportional reversing valve, the other ends of the right one-opening hydraulic control one-way valve and the right four-opening hydraulic control one-way valve are connected with a rodless cavity of the left walking beam lifting cylinder and a rodless cavity of the right walking beam lifting cylinder respectively.
According to the hydraulic control device of the step heating furnace lifting oil cylinder, the synchronous device is arranged between the opening A of the proportional reversing valve and the right one-opening hydraulic control check valve and between the proportional reversing valve and the right two-opening hydraulic control check valve, the synchronous device comprises the left check valve, the left-opening overflow valve, the synchronous motor, the right-opening overflow valve and the right check valve, an oil inlet of the synchronous motor is connected with the opening A of the proportional reversing valve, two oil distributing ports are respectively connected with the right one-opening hydraulic control check valve and the right two-opening hydraulic control check valve, oil inlets of the left check valve and the right check valve are connected with an oil return pipeline, and oil outlets of the left-opening overflow valve and the right-opening overflow valve are respectively connected with pipelines of the two oil distributing ports of the synchronous motor.
According to the hydraulic control device of the walking beam lifting oil cylinder, the left balance valve and the left overflow valve are arranged on the pipeline connected with the rodless cavity of the left walking beam lifting oil cylinder, and the right balance valve and the right overflow valve are arranged on the pipeline connected with the rodless cavity of the right walking beam lifting oil cylinder.
According to the invention, the lifting oil cylinders of the stepping heating furnace are controlled by adopting two sets of hydraulic control systems, when one set of hydraulic control system fails, the other set of hydraulic control system can be started immediately without stopping, so that the influence of the failure of the hydraulic system on hot rolling production is reduced, the normal operation of hydraulic equipment is ensured, and the stability and reliability of steel rolling equipment are improved.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a hydraulic system of the present invention;
fig. 2 is a hydraulic schematic diagram of the synchronization device.
The reference numerals in the figures are: 1. a closed control reversing valve, 2, a left pressure compensator, 3, a left proportional reversing valve, 4, a left shuttle valve, 5, a left one-hydraulic control one-way valve, 6, a left two-hydraulic control one-way valve, 7, a left balance valve, 8, a left overflow valve, 9, a left stepping Liang Shengjiang oil cylinder, 10, a right stepping Liang Shengjiang oil cylinder, 11, a right overflow valve, 12, a right balance valve, 13, a right one-hydraulic control one-way valve, 14, a right two-hydraulic control one-way valve, 15, a right shuttle valve, 16, right proportional reversing valve, 17, right pressure compensator, 18, proportional reversing valve, 19, right one-open hydraulic control check valve, 20, right two-open hydraulic control check valve, 21, synchronizer, 22, right three-open hydraulic control check valve, 23, right four-open hydraulic control check valve, 24, open control reversing valve, 25, left check valve, 26, left overflow valve, 27, synchronous motor, 28, right overflow valve, 29, right check valve.
Detailed Description
The invention provides a hydraulic control device of a lifting cylinder of a stepping heating furnace, which adopts two control modes of closed loop and open loop, and can improve the synchronous control precision of the lifting cylinder of the stepping heating furnace, eliminate synchronous errors, and achieve the purposes of prolonging the service life of a walking beam and increasing the running stability and reliability of the stepping heating furnace.
The invention consists of two hydraulic control systems and a public loop, wherein one is a closed loop control system and the other is an open loop control system, and the two hydraulic control systems are connected in parallel through a hydraulic pipeline and are connected with the public loop together. The common circuit includes a left cylinder side circuit and a right cylinder side circuit.
Referring to fig. 1 and 2, the closed-loop control system mainly comprises a closed-control reversing valve 1, a left pressure compensator 2, a left proportional reversing valve 3, a left shuttle valve 4, a left one-hydraulic control one-way valve 5, a left two-hydraulic control one-way valve 6, a right one-hydraulic control one-way valve 13, a right two-hydraulic control one-way valve 14, a right shuttle valve 15, a right proportional reversing valve 16 and a right pressure compensator 17. The locking device is composed of a closed control reversing valve 1, a left first hydraulic control one-way valve 5, a left second hydraulic control one-way valve 6, a right first hydraulic control one-way valve 13 and a right second hydraulic control one-way valve 14, wherein the closed control reversing valve 1 controls the opening and locking of the left first hydraulic control one-way valve 5, the left second hydraulic control one-way valve 6, the right first hydraulic control one-way valve 13 and the right second hydraulic control one-way valve 14, and when a closed loop control system works, the closed control reversing valve 1 controls the opening of the left first hydraulic control one-way valve 5, the left second hydraulic control one-way valve 6, the right first hydraulic control one-way valve 6 and the right second hydraulic control one-way valve 14, and when an open loop control system works, the closed control reversing valve 1 controls the locking of the left first hydraulic control one-way valve 5, the left second hydraulic control one-way valve 6, the right first hydraulic control one-way valve 13 and the right second hydraulic control one-way valve 14. The left proportional reversing valve 3, the left shuttle valve 4 and the left pressure compensator 2 form a left lifting oil cylinder control loop, the left proportional reversing valve 3 is used for controlling a piston rod of the left walking beam lifting oil cylinder 9 to extend or retract (namely, a walking beam ascends or descends), the left shuttle valve 4 and the left pressure compensator 2 form an inlet pressure compensator, and the problem of flow fluctuation caused by load pressure fluctuation is effectively solved by overlapping the inlet pressure compensator before the left proportional reversing valve 3, so that the oil flow passing through the left proportional reversing valve 3 is ensured to be changed in proportion to an electric signal, the lifting process of the walking beam is better regulated and controlled, and inertia impact is effectively inhibited. The right proportional reversing valve 16, the shuttle valve 15 and the right pressure compensator 17 form a right lifting oil cylinder control loop, and the right proportional reversing valve 16 is used for controlling the extension or retraction of a piston rod of the right walking beam lifting oil cylinder 10 (namely, the lifting or descending of a walking beam). The right shuttle valve 15 and the right pressure compensator 17 form an inlet pressure compensator, and the inlet pressure compensator is overlapped before the right proportional reversing valve 16, so that the problem of flow fluctuation caused by load pressure fluctuation is effectively solved, the oil flow passing through the left proportional reversing valve 3 is ensured to be changed in proportion to the electric signal, the lifting process of the walking beam is better regulated and controlled, and the inertia impact is effectively inhibited.
The left walking beam lifting cylinder 9 and the right walking beam lifting cylinder 10 are two hydraulic cylinders with piston rod displacement sensors, and when the hydraulic cylinders work, the piston rod displacement sensors transmit displacement data to an industrial personal computer, and the industrial personal computer sends control signals to the left proportional reversing valve 3 and the right proportional reversing valve 16 after operation processing so as to adjust synchronization of the left proportional reversing valve and the right proportional reversing valve. In the hydraulic synchronous control, a master-slave mode control strategy is adopted, the output of a piston rod displacement sensor of a left walking beam lifting cylinder 9 is taken as ideal output in two execution elements needing synchronous control, and the output of a piston rod displacement sensor of a right walking beam lifting cylinder 10 is controlled to track the selected ideal output and achieve synchronous driving.
The open loop control system comprises a locking device, a synchronous loop and a lifting control loop. The locking device consists of an opening control reversing valve 24, a right one-opening hydraulic control one-way valve 19, a right two-opening hydraulic control one-way valve 20, a right three-opening hydraulic control one-way valve 22 and a right four-opening hydraulic control one-way valve 23, when the open loop control system works, an electromagnet 2DT of the opening control reversing valve 24 is powered on, the right one-opening hydraulic control one-way valve 19, the right two-hydraulic control one-way valve 20, the right three-hydraulic control one-way valve 22 and the right four-hydraulic control one-way valve 23 are opened, and when the open loop control system does not work, the electromagnet 2DT of the opening control reversing valve 24 is powered off, and the right one-hydraulic control one-way valve 19, the right two-hydraulic control one-way valve 20, the right three-hydraulic control one-way valve 22 and the right four-hydraulic control one-way valve 23 are locked. The lifting control loop consists of a proportional reversing valve 18 and is used for controlling the piston rods of the left walking beam lifting cylinder 9 and the right walking beam lifting cylinder 10 to extend or retract (namely, the walking beam is lifted or lowered). The synchronous loop, namely the synchronous device 21, is composed of a left check valve 25, a left overflow valve 26, a synchronous motor 27, a right overflow valve 28 and a right check valve 29, is arranged on an oil path between the proportional reversing valve 18 and rodless cavities of the left walking beam lifting oil cylinder 9 and the right walking beam lifting oil cylinder 10, pressure oil from the proportional reversing valve 18 is equally divided into two paths after passing through the synchronous motor 27 and respectively enters the rodless cavities of the left walking beam lifting oil cylinder 9 and the right walking beam lifting oil cylinder 10, the left overflow valve 26 and the right overflow valve 28 in the synchronous device 21 are used for overflow, and if the left walking beam lifting oil cylinder 9 arrives at a stroke, the right walking beam lifting oil cylinder 10 continues to operate, and then the left overflow valve 26 connected with the left walking beam lifting oil cylinder 9 overflows. The rodless cavity of the right walking beam lifting cylinder 10 absorbs oil from the oil tank through the right one-way valve 29 connected with the right walking beam lifting cylinder, and similarly, when the left walking beam lifting cylinder 9 runs continuously after the right walking beam lifting cylinder 10 arrives at the stroke, the right open overflow valve 28 overflows, the left one-way valve 25 absorbs oil from the oil tank, and in a word, the left one-way valve 25, the left open overflow valve 26, the right open overflow valve 28 and the right one-way valve 29 are used for eliminating synchronous accumulation errors in a synchronous loop.
The proportional reversing valve 18 in the open loop control system is only used for reversing an oil way and outputting flow which is set according to a program, and plays roles of buffering and reducing impact, and a synchronous loop plays a role in synchronization in the open loop control system. The proportional directional valve 18 is open-loop controlled in that the feedback signal enters the industrial personal computer, but the industrial personal computer does not output the regulated signal, and feedback is not performed.
The left balance valve 7 and the left overflow valve 8 form a left cylinder bypass loop, and the left balance valve 7 has the functions of a hydraulic control one-way valve and a flow limiting valve and is used for ensuring the control precision and the safety of lifting actions. The left overflow valve 8 plays a role of pressure limiting safety.
The right balance valve 12 and the right overflow valve 11 form a right cylinder bypass loop, and the right balance valve 12 has the functions of a hydraulic control one-way valve and a flow limiting valve and is used for ensuring the control precision and the safety of lifting actions. The right overflow valve 11 plays a pressure limiting safety role.
The left cylinder side loop and the right cylinder side loop form a common loop.
The working process of the invention is as follows:
1. standby
The left proportional reversing valve 3, the right proportional reversing valve 16 and the proportional reversing valve 18 are not connected with signals of an industrial personal computer, meanwhile, the electromagnet 1DT of the closed reversing valve 1 is powered off, the electromagnet 2DT of the open reversing valve 24 is powered off, and the two hydraulic control systems in the hydraulic control device of the lifting oil cylinder of the stepping heating furnace are not operated and are in a standby state, namely the left one-hydraulic control one-way valve 5, the left two-hydraulic control one-way valve 6, the right one-hydraulic control one-way valve 13, the right two-hydraulic control one-way valve 14, the right one-open hydraulic control one-way valve 19, the right two-open hydraulic control one-way valve 20, the right three-open hydraulic control one-way valve 22 and the right four-hydraulic control one-way valve 23 are all locked.
2. The closed loop control system works and the open loop control system stands by
1) Lifting the walking beam
The electromagnet 1DT of the closed control reversing valve 1 is powered on, the control pressure oil opens the left first hydraulic control one-way valve 5, the left second hydraulic control one-way valve 6, the right first hydraulic control one-way valve 13 and the right second hydraulic control one-way valve 14, meanwhile, the left proportional reversing valve 3 and the right proportional reversing valve 16 receive control signals of an industrial personal computer, the pressure oil enters a rodless cavity of the left walking beam lifting cylinder 9 through the left pressure compensator 2, the left proportional reversing valve 3, the left first hydraulic control one-way valve 5 and the left balance valve 7, pushes a piston rod to move upwards, meanwhile, hydraulic oil with a rod cavity of the left walking beam lifting cylinder 9 enters an oil return pipeline through the left second hydraulic control one-way valve 6 and the left proportional reversing valve 3, meanwhile, the pressure oil enters a rodless cavity of the right walking beam lifting cylinder 10 through the right pressure compensator 17, the right proportional reversing valve 16, the right hydraulic control one-way valve 13 and the right balance valve 12, the piston rod is pushed to move upwards, and meanwhile, the hydraulic oil with the rod cavity of the right walking beam lifting cylinder 10 enters the oil return pipeline through the right second hydraulic control one-way valve 14 and the right proportional reversing valve 16.
When the piston rods of the left walking beam lifting cylinder 9 and the right walking beam lifting cylinder 10 rise to the highest end, the industrial personal computer stops sending control signals to the left proportional reversing valve 3 and the right proportional reversing valve 16, the electromagnet 1DT of the closed control reversing valve 1 is powered off, and the left one-hydraulic control one-way valve 5, the left two-hydraulic control one-way valve 6, the right one-hydraulic control one-way valve 13 and the right two-hydraulic control one-way valve 14 are automatically locked.
2) The walking beam descends
The step heating furnace translation hydraulic system drives a heating furnace walking beam to translate forward, after translation is in place, an electromagnet 1DT of a closed control reversing valve 1 is powered, pressure oil is controlled to open a left one-hydraulic one-way valve 5, a left two-hydraulic one-way valve 6, a right one-hydraulic one-way valve 13 and a right two-hydraulic one-way valve 14, meanwhile, the left proportional reversing valve 3 and the right proportional reversing valve 16 are connected to control signals of an industrial personal computer, the pressure oil passes through a left pressure compensator 2, the left proportional reversing valve 3 and the left two-hydraulic one-way valve 6 and enters a rod cavity of a left walking beam lifting cylinder 9 to push a piston rod to move downwards, meanwhile, hydraulic oil of a rodless cavity of the left walking beam lifting cylinder 9 enters an oil return pipeline through the left balance valve 7, the left one-hydraulic one-way valve 5 and the left proportional reversing valve 3, meanwhile, the pressure oil passes through a right pressure compensator 17, the right proportional reversing valve 16 and the right two-hydraulic one-way valve 14 and enters a rod cavity of a right walking beam lifting cylinder 10 to push hydraulic oil of the rodless cavity of the right walking beam lifting cylinder 10 to move downwards, and meanwhile, the hydraulic oil of the right walking beam lifting cylinder 10 enters the piston rod one-way valve 12 and the right proportional reversing valve 13 and enters the piston rod one-way valve 16.
When the piston rods of the left walking beam lifting cylinder 9 and the right walking beam lifting cylinder 10 descend to the lowest ends, the industrial personal computer stops sending control signals to the left proportional reversing valve 3 and the right proportional reversing valve 16, the electromagnet 1DT of the closed control reversing valve 1 is powered off, and the left one-hydraulic control one-way valve 5, the left two-hydraulic control one-way valve 6, the right one-hydraulic control one-way valve 13 and the right two-hydraulic control one-way valve 14 are automatically locked.
The walking beam of the heating furnace is driven by the walking beam translation hydraulic system to move backwards and translate, and after the walking beam is translated in place, the walking beam lifting work is repeated by the walking heating furnace, so that the reciprocating work is circulated.
2. The open loop control system works and the closed loop control system stands by
1) Closing the hydraulic closed-loop control system when a fault occurs
The industrial personal computer stops sending control signals to the left proportional reversing valve 3 and the right proportional reversing valve 16, and simultaneously, the electromagnet 1DT of the closed control reversing valve 1 is powered off, and the left one-hydraulic control one-way valve 5, the left two-hydraulic control one-way valve 6, the right one-hydraulic control one-way valve 13 and the right two-hydraulic control one-way valve 14 are locked.
1) Open loop control system operation
Lifting the walking beam
The electromagnet 2DT of the open control reversing valve 24 is powered, the right one-open hydraulic control one-way valve 19, the right two-open hydraulic control one-way valve 20, the right three-open hydraulic control one-way valve 22 and the right four-open hydraulic control one-way valve 23 are opened, the industrial personal computer sends control signals to the proportional reversing valve 18, the pressure oil enters the synchronous device 21 after passing through the proportional reversing valve 18 and is evenly divided into two equal pressure oil strands by the synchronous device 21, one pressure oil strand enters the rodless cavity of the left walking beam lifting cylinder 9 through the right one-open hydraulic control one-way valve 19 and the left balance valve 7, the other pressure oil strand enters the rodless cavity of the right walking beam lifting cylinder 10 through the right two-open hydraulic control one-way valve 20 and the right balance valve 12, the piston rods of the left walking beam lifting cylinder 9 and the right walking beam lifting cylinder 10 ascend, meanwhile hydraulic oil in the rod cavity of the left walking beam lifting cylinder 9 enters an oil return pipeline through the right three-open hydraulic control one-way valve 22 and the proportional reversing valve 18, and hydraulic oil in the rod cavity of the right walking beam lifting cylinder 10 enters the oil return pipeline through the right four-open hydraulic control one-way valve 23 and the proportional reversing valve 18. When the piston rods of the left walking beam lifting cylinder 9 and the right walking beam lifting cylinder 10 rise to the highest end, the industrial personal computer stops sending control signals to the proportional reversing valve 18, the electromagnet 2DT of the closed reversing valve 2 is powered off, and the right one-opening hydraulic control one-way valve 19, the right two-opening hydraulic control one-way valve 20, the right three-opening hydraulic control one-way valve 22 and the right four-opening hydraulic control one-way valve 23 are locked.
The walking beam descends
The stepping heating furnace translation hydraulic system drives a heating furnace walking beam to translate forward, after translation is in place, an electromagnet 2DT of a switching valve 24 is switched on, pressure control oil opens a right one-opening hydraulic control one-way valve 19, a right two-opening hydraulic control one-way valve 20, a right three-opening hydraulic control one-way valve 22 and a right four-opening hydraulic control one-way valve 23, meanwhile, a proportional switching valve 18 is connected to a control signal of an industrial personal computer, the pressure oil respectively enters rod cavities of a left walking beam lifting cylinder 9 and a right walking beam lifting cylinder 10 through the proportional switching valve 18, the right three-opening hydraulic control one-way valve 22 and the right four-opening hydraulic control one-way valve 23, piston rods of the left walking beam lifting cylinder 9 and the right walking beam lifting cylinder 10 move downwards, and hydraulic oil in rodless cavities of the left walking beam lifting cylinder 9 and the right walking beam lifting cylinder 10 respectively flows back to an oil return pipeline through a left balance valve 7, a right one-opening hydraulic control one-way valve 19, a right balance valve 12, a right two-opening hydraulic control one-way valve 20, a synchronization device 21 and the proportional switching valve 18.
When the piston rods of the left walking beam lifting cylinder 9 and the right walking beam lifting cylinder 10 descend to the lowest end, the industrial personal computer stops sending control signals to the proportional reversing valve 18, the electromagnet 2DT of the opening and control reversing valve 24 is powered off, and the right one-opening hydraulic control one-way valve 19, the right two-opening hydraulic control one-way valve 20, the right three-opening hydraulic control one-way valve 22 and the right four-opening hydraulic control one-way valve 23 are automatically locked.
The walking beam of the heating furnace is driven by the walking beam translation hydraulic system to move backwards and translate, and after the walking beam is translated in place, the walking beam lifting work is repeated by the walking heating furnace, so that the reciprocating work is circulated.
The beneficial effects of the invention are as follows:
1. according to the invention, two hydraulic control systems are adopted for control, when one hydraulic control system fails, the other hydraulic control system is started immediately, so that the pressure of on-line maintenance is reduced, the normal operation of hydraulic equipment is ensured, and the stability and reliability of steel rolling equipment are improved.
The two hydraulic control systems of the invention realize the synchronization of the two walking beam lifting cylinders by adopting a hydraulic method, can improve the mechanism stability of the lifting frame and the shifting frame of the walking heating furnace and delay the service life of the walking heating furnace.
Hydraulic element specification and model
Closed control reversing valve 1 DG4V-3-6B-VM-U-H7-60
Left pressure compensator 2 ZDC32P-2X/M
Left proportional reversing valve 3 4WRZE32W8-360-7X/6EG24NK31/FDM
Left shuttle valve 4 DRCO LAN
Left one-hydraulic control one-way valve 5 CVCV-XCN
Left two hydraulic control check valve 6 CVCV-XCN
Left balance valve 7 FD32FB2X/300BO4V
Left overflow valve 8 RDFA-LWN
Left walking beam lifting cylinder 9 phi 320 phi 220-1060
Right walking beam lifting cylinder 10 phi 320 phi 220-1060
Right overflow valve 11 RDFA-LWN
Right balance valve 12 FD32FB2X/300BO4V
Right one-pilot operated check valve 13 CVCV-XCN
Right two hydraulically-controlled check valve 14 CVCV-XCN
Right shuttle valve 15 DRCO LAN
Right proportional reversing valve 16 4WRZE32W8-360-7X/6EG24NK31/FDM
Right pressure compensator 17 ZDC32P-2X/M
Proportional reversing valve 18 4WRZE32W8-360-7X/6EG24NK31/FDM
Opening right one-hydraulic control one-way valve 19 CVCV-XCN
Opening right two liquid control check valve 20 CVCV-XCN
Opening right three hydraulic control check valve 22 CVCV-XCN
Opening right four hydraulic control check valve 23 CVCV-XCN
Open-control reversing valve 24 DG4V-3-6B-VM-U-H7-60
Left check valve 25M-SR 15KE05-10B
Left open relief valve 26 DBDS30K10/31.5
Synchronous motor 27 JKS-024S-FC-V
Right opening relief valve 28 DBDS30K10/31.5
Right check valve 29M-SR 15KE05-10B.
Claims (2)
1. The hydraulic control device of the stepping heating furnace lifting cylinder is characterized by comprising a closed loop control system and an open loop control system, wherein the closed loop control system comprises a locking device, a left lifting cylinder control loop and a right lifting cylinder control loop which are connected with the output end of an industrial personal computer, and two piston rod displacement sensors which are connected with the input end of the industrial personal computer and are respectively arranged on a left stepping beam lifting cylinder and a right stepping beam lifting cylinder of the stepping heating furnace, the left lifting cylinder control loop and the right lifting cylinder control loop are respectively connected with the left stepping beam lifting cylinder and the right stepping beam lifting cylinder of the stepping heating furnace through the locking device, and the open loop control system is connected with the left stepping beam lifting cylinder and the right stepping beam lifting cylinder of the stepping heating furnace;
the left lifting oil cylinder control loop comprises a left proportional reversing valve (3), wherein a P port of the left proportional reversing valve (3) is connected with pressure oil, a T port of the left proportional reversing valve is connected with an oil return pipe, and a A port and a B port of the left proportional reversing valve are respectively connected with a rodless cavity and a rod cavity of a left stepping Liang Shengjiang oil cylinder (9) of the stepping heating furnace through locking devices; the control loop of the right lifting oil cylinder comprises a right proportional reversing valve (16), wherein a P port of the right proportional reversing valve (16) is connected with pressure oil, a T port of the right proportional reversing valve is connected with an oil return pipe, an A port and a B port of the right proportional reversing valve are respectively connected with a rodless cavity and a rod cavity of a right stepping Liang Shengjiang oil cylinder (10) of the stepping heating furnace through locking devices, and control ends of the left proportional reversing valve (3) and the right proportional reversing valve (16) are connected with an output end of an industrial personal computer;
the left lifting oil cylinder control loop further comprises a left shuttle valve (4) and a left pressure compensator (2), wherein two oil inlets of the left shuttle valve (4) are respectively connected with an A port and a B port of the left proportional reversing valve (3), the left pressure compensator (2) is connected in series on a high-pressure oil pipe connected with a P port of the left proportional reversing valve (3), and a pressure detection port of the left pressure compensator (2) is connected with a working port of the left shuttle valve (4); the right lifting oil cylinder control loop further comprises a right shuttle valve (15) and a right pressure compensator (17), wherein two oil inlets of the right shuttle valve (15) are respectively connected with an A port and a B port of a right proportional reversing valve (16), the right pressure compensator (17) is connected in series on a high-pressure oil pipe connected with a P port of the right proportional reversing valve (16), and a pressure detection port of the right pressure compensator (17) is connected with a working port of the right shuttle valve (15);
the locking device comprises a closed control reversing valve (1), a left first hydraulic control one-way valve (5), a left second hydraulic control one-way valve (6), a right first hydraulic control one-way valve (13) and a right second hydraulic control one-way valve (14), wherein the P port of the closed control reversing valve (1) is connected with pressure oil, the T port is connected with a drain pipe, and the left first hydraulic control one-way valve (5), the left second hydraulic control one-way valve (6), the right first hydraulic control one-way valve (13) and the right second hydraulic control one-way valve (14) are respectively connected with the oil pipes connected with the A port and the B port of the left proportional reversing valve (3) and the B port of the right proportional reversing valve (16) in series, and the control oil ports of the left hydraulic control one-way valve (1) and the B port are connected with the A port and the B port of the closed control reversing valve (1);
the open loop control system comprises a locking device and a lifting control loop, the lifting control loop comprises a proportional reversing valve (18), a P port of the proportional reversing valve (18) is connected with pressure oil, a T port of the proportional reversing valve is connected with an oil return pipe, and a control end of the proportional reversing valve (18) is connected with an output end of an industrial personal computer; the locking device comprises an opening control reversing valve (24), a right one-opening hydraulic control one-way valve (19), a right two-opening hydraulic control one-way valve (20), a right three-opening hydraulic control one-way valve (22) and a right four-opening hydraulic control one-way valve (23), wherein the P port of the opening control reversing valve (24) is connected with pressure oil, the T port is connected with a drain pipe, the A port and the B port are connected with control oil ports of the right one-opening hydraulic control one-way valve (19), the right two-opening hydraulic control one-way valve (20), the right three-opening hydraulic control one-way valve (22) and the right four-opening hydraulic control one-way valve (23), one end of the right one-opening hydraulic control one-way valve (19) and one end of the right two-opening hydraulic control one-way valve (20) are connected with an A port of the proportional reversing valve (18), the other end of the right three-opening hydraulic control one-way valve (22) and one-opening hydraulic control one-way valve (23) are respectively connected with rodless cavities of a left stepping Liang Shengjiang cylinder (9) and a right stepping Liang Shengjiang cylinder (10), and the other end of the right three-opening hydraulic control one-way valve (23) is respectively connected with rod cavities of the left stepping Liang Shengjiang cylinder (62 and the stepping cylinder (62);
a synchronization device (21) is arranged between an A port of the proportional reversing valve (18) and a right one-opening hydraulic control one-way valve (19) and a right two-opening hydraulic control one-way valve (20), the synchronization device (21) comprises a left one-way valve (25), a left opening overflow valve (26), a synchronous motor (27), a right opening overflow valve (28) and a right one-way valve (29), an oil inlet of the synchronous motor (27) is connected with the A port of the proportional reversing valve (18), two oil distributing ports are respectively connected with the right one-opening hydraulic control one-way valve (19) and the right two-opening hydraulic control one-way valve (20), oil inlets of the left one-way valve (25) and the right one-way valve (29) are connected with an oil return pipeline, and oil outlets of the left opening overflow valve (26) and the right opening overflow valve (28) are respectively connected with pipelines of two oil distributing ports of the synchronous motor (27).
2. The hydraulic control device of the step heating furnace lifting oil cylinder according to claim 1, wherein a left balance valve (7) and a left overflow valve (8) are arranged on a pipeline connected with a rodless cavity of the left step Liang Shengjiang oil cylinder (9), and a right balance valve (12) and a right overflow valve (11) are arranged on a pipeline connected with a rodless cavity of the right step Liang Shengjiang oil cylinder (10).
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05248405A (en) * | 1992-03-10 | 1993-09-24 | Kobe Steel Ltd | Pressurizer of working machine |
| CN201269230Y (en) * | 2008-05-20 | 2009-07-08 | 上海建工股份有限公司 | Integral jacking creeping formwork hydraulic synchronous integrated control system for steel construction platform |
| CN202704932U (en) * | 2012-01-06 | 2013-01-30 | 中冶东方工程技术有限公司 | Mechanical hydraumatic jacking system for furnace bottom of walking beam furnace |
| CN204140527U (en) * | 2014-09-12 | 2015-02-04 | 鞍钢集团工程技术有限公司 | A kind of hydraulic system of walking-beam furnace |
| CA2955713A1 (en) * | 2015-10-27 | 2017-04-27 | China University Of Mining And Technology | A multi-cylinder synchronous energy-saving and efficient hydraulic lift system and method thereof |
| CN108194435A (en) * | 2018-03-29 | 2018-06-22 | 大连华锐重工集团股份有限公司 | A kind of bolt-type ocean lifting platform synchronization hydraulic system and its control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654074B (en) * | 2018-12-26 | 2020-04-07 | 太原理工大学 | Hydraulic system of engineering machinery |
-
2021
- 2021-08-24 CN CN202110976149.3A patent/CN113864260B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05248405A (en) * | 1992-03-10 | 1993-09-24 | Kobe Steel Ltd | Pressurizer of working machine |
| CN201269230Y (en) * | 2008-05-20 | 2009-07-08 | 上海建工股份有限公司 | Integral jacking creeping formwork hydraulic synchronous integrated control system for steel construction platform |
| CN202704932U (en) * | 2012-01-06 | 2013-01-30 | 中冶东方工程技术有限公司 | Mechanical hydraumatic jacking system for furnace bottom of walking beam furnace |
| CN204140527U (en) * | 2014-09-12 | 2015-02-04 | 鞍钢集团工程技术有限公司 | A kind of hydraulic system of walking-beam furnace |
| CA2955713A1 (en) * | 2015-10-27 | 2017-04-27 | China University Of Mining And Technology | A multi-cylinder synchronous energy-saving and efficient hydraulic lift system and method thereof |
| CN108194435A (en) * | 2018-03-29 | 2018-06-22 | 大连华锐重工集团股份有限公司 | A kind of bolt-type ocean lifting platform synchronization hydraulic system and its control method |
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