CN111790900A - A kind of automatic unloading device and working method of oil cylinder of ladle sliding plate mechanism of continuous casting machine - Google Patents

Abstract

The invention relates to an automatic unloading device and a working method for an oil cylinder of a ladle sliding plate mechanism of a continuous casting machine. The device comprises an oil inlet hydraulic main pipe, an oil cylinder and an oil return hydraulic main pipe which are connected in sequence, and the oil cylinder is connected with the oil inlet hydraulic main pipe and the oil return hydraulic main pipe. A quick action system is connected. The oil inlet hydraulic branch pipe and the oil return hydraulic branch pipe are respectively led out between the oil cylinder and the quick action system. The oil inlet hydraulic branch pipe and the oil return hydraulic branch pipe are respectively connected with the oil return hydraulic main pipe through the unloading oil return branch pipe. A two-position four-way valve is provided on the unloading oil return branch pipe. The two-position four-way valve corresponding to the upper and lower ends of the two unloading oil return branch pipes respectively intercepts a short-circuit branch, and is equipped with a short-circuit branch on the short-circuit branch. Manual shut-off valve; quick-action system and 2/4-way valve are both signal-connected to the control system. The invention can realize the active unloading of the oil cylinder, and has the emergency function to avoid the continuous casting machine from being cut off.

Description

A kind of automatic unloading device and working method of oil cylinder of ladle sliding plate mechanism of continuous casting machine

technical field

The invention relates to the technical field of automatic unloading of oil cylinders, more particularly, it relates to an automatic unloading device and working method of an oil cylinder of a ladle sliding plate mechanism of a continuous casting machine.

Background technique

In the continuous casting process of the continuous casting machine, after a ladle has been poured with molten steel, the empty ladle needs to be transferred to the lifting area by the ladle turntable to be lifted away by driving. At this time, the hydraulic cylinder installed on the sliding plate mechanism of the ladle needs to be removed and left to The next new ladle filled with molten steel is hung on the ladle turntable, and then the hydraulic cylinder is installed on the sliding plate mechanism for recycling. The ladle sliding plate mechanism is fixedly installed on the side of the ladle nozzle. There is an oil cylinder mounting base in the mechanism for installing the hydraulic cylinder. The hydraulic cylinder of the ladle sliding plate mechanism can be installed in the cylinder mounting base of the sliding plate mechanism and can be removed. The ladle sliding plate mechanism controls the opening and closing of the sliding plate mechanism through the expansion and contraction of the piston rod of the hydraulic cylinder to control the flow rate of the molten steel from the ladle. The traditional hydraulic cylinder installation method is to manually fit the hydraulic cylinder with the cylinder mounting base, the cylinder piston rod and the sliding plate T-shaped connecting rod, and then use the manual latch to fix the cylinder. Usually, the temperature of molten steel in the ladle is about 1500℃, and the surface temperature of the sliding plate mechanism is above 100℃. In the process of manual installation and disassembly, workers need to endure long-term high-temperature baking, and there is a safety hazard of scalding, so robots are used instead of manual operations. Using the robot to automatically install and remove the slide mechanism cylinder requires manual and automatic control of the cylinder pressure unloading, so that the friction between the cylinder jaws and the mechanism is reduced to a very low level. The original system has a great friction under the condition of 18MPa, which exceeds the load of the robot. force, the robot cannot automatically remove the cylinder.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide an automatic unloading device and a working method for the oil cylinder of the ladle sliding plate mechanism of a continuous casting machine. , and has the emergency function to avoid the continuous casting machine breaking pouring, which is suitable for the working occasion of the metallurgical continuous casting machine. The method of the invention effectively reduces the labor intensity of workers and increases the service life of the robot equipment.

The above-mentioned technical purpose of the present invention is achieved by the following technical solutions: an automatic unloading device for an oil cylinder of a ladle sliding plate mechanism of a continuous caster, comprising an oil inlet hydraulic main pipe, an oil cylinder and an oil return hydraulic main pipe that are connected in sequence, and the oil cylinder is connected to the oil inlet hydraulic main pipe. A quick-action system is connected between the oil hydraulic main pipe and the oil-return hydraulic main pipe, the oil-inlet hydraulic branch pipe and the oil-return hydraulic branch pipe are respectively led out between the oil cylinder and the quick-action system, and the oil-inlet hydraulic branch pipe and the oil-return hydraulic branch pipe respectively pass through The unloading oil return branch pipe is communicated with the oil return hydraulic main pipe, two-position four-way valves are arranged on the two unloading oil return branch pipes, and the two-position four-way valve corresponds to the upper and lower parts of the two unloading oil return branch pipes. A short-circuit branch is intercepted at both ends, and a manual shut-off valve is arranged on the short-circuit branch; the quick-action system and the two-position four-way valve are both signal-connected to the control system.

Further, between the oil inlet hydraulic branch pipe and the oil return hydraulic branch pipe and the oil inlet hydraulic main pipe and the oil return hydraulic main pipe, there is also a manual control action system in parallel with the quick action system. two and connected in parallel with each other.

Further, both the quick action system and the manual action system respectively comprise a three-position four-way valve, a hydraulic one-way valve and a speed regulating valve which are communicated in sequence.

Further, the two-position four-way valve and the three-position four-way valve in the quick-action system are both electromagnetic reversing valves.

The invention also includes a working method of the automatic unloading device of the oil cylinder of the ladle sliding plate mechanism of the continuous casting machine, comprising the following steps:

S1. After the ladle is poured with molten steel, the empty ladle is transferred to the hoisting area through the ladle turntable to be hoisted away. At this time, the operator sends a disassembly instruction through the control system;

S2. The control system sends an electrical signal to energize the two-position four-way valve, so that the oil pressure of the rod cavity and the rodless cavity of the oil cylinder is unloaded into the oil return hydraulic main pipe, and then loses power;

S3. The control system then transmits the disassembly signal to the robot system, removes the oil cylinder and grabs the oil cylinder and returns to the standby position to wait for the installation of the next ladle;

S4. The ladle filled with molten steel is hoisted to the ladle turntable of the continuous casting machine. At this time, the operator sends an installation instruction through the control system;

S5. The control system transmits the installation signal to the robot system, and the robot grabs the oil cylinder and installs it on the base of the ladle;

S6. The operator issues work instructions through the control system, and the quick action system controls the molten steel to flow out to the intermediate tank for casting;

S7. After casting, repeat step S1.

Further, it also includes the steps of emergency response: after the operator finds the failure of the two-position four-way valve, the operator opens the manual stop valve to perform manual unloading work, closes the manual stop valve after completion to find the fault, and resumes normal work.

Further, in the step S4, after the control system sends out the installation instruction, it first sends an electrical signal to turn on the two-position four-way valve, and then loses power, and then goes to step S5.

Further, the electrification time of the two-position four-way valve is 8-12 seconds, and the way for the operator to control the control system is through a remote console and its buttons.

Further, in the step S6, the control mode of the quick-action system is to control the three-position four-way valve, the hydraulic check valve and the speed regulating valve in the quick-action system, so that the hydraulic pressure of the oil inlet hydraulic main pipe is passed through the oil inlet hydraulic pressure. The branch pipe and the oil return hydraulic branch pipe are connected to each other, and the piston rod of the oil cylinder drives the connecting ball to push the sliding plate mechanism to reciprocate; when the casting reaches the set flow rate, the three-position four-way valve is de-energized and kept until the casting is completed.

Further, when the quick action system fails, manually control the manual control action system in parallel with the quick action system to complete this step, and find the fault to restore normal work.

To sum up, the present invention has the following beneficial effects:

1. The present invention can realize the active unloading of the oil cylinder, which is convenient for the robot to automatically remove the oil cylinder, and has an emergency function to avoid the continuous casting machine from breaking the pouring. The labor intensity of workers is increased, and the service life of robot equipment is improved.

2. The device structure of the present invention is simple in operation, stable in operation and convenient in installation. A group of two-position four-way valves for automatic unloading are newly added to the hydraulic control system of the oil cylinder. The rod cavity and rodless cavity are connected with the oil return port, so that the pressure of the two cavities of the oil cylinder becomes 0, that is, the automatic unloading of the oil cylinder is realized, the operation difficulty is reduced, and the safety of the operation process is improved. It is compatible with manual control and can be Manually unload the two-chamber pressure of the cylinder in the event of an abnormal fixture.

3. The method of the present invention ensures that the pressure of the rod cavity and the rodless cavity of the cylinder is zero before and after loading and unloading the oil cylinder. At this time, the friction between the piston rod and the connecting ball head is weakened to zero, which is convenient for the robot to automatically unload and unload the sliding plate mechanism. cylinder. The method replaces manual operation by a robot, completely eliminates personnel safety accidents, and has a simple and reliable structure and is easy to maintain.

4. Before and after the robot loads and unloads the cylinder, the two-position four-way valve is energized and then de-energized to ensure that the robot can complete the operation, which can effectively reduce the equipment failure rate. At the same time, corresponding emergency measures are preset in each main work step. , to prevent the failure of the circuit or remote control signal, which affects the continuous use of the continuous casting machine, and avoids the possibility of the continuous casting machine breaking.

Description of drawings

Fig. 1 is the structural representation of a kind of continuous casting machine ladle sliding plate mechanism oil cylinder automatic unloading device of the present invention;

Figure 2 is a schematic structural diagram of the connection between the oil cylinder and the ladle of the present invention.

In the figure: 1. Quick action system; 2. Three-position four-way valve; 3. Hydraulic check valve; 4. Speed regulating valve; 5. Oil cylinder; 6. Oil inlet hydraulic branch; 7. Oil return hydraulic branch; 11. Manual control action system; 12. Unloading oil return branch pipe; 13. Two-position four-way valve; 14. Manual stop valve; 15. Oil return hydraulic main pipe; 16. Oil inlet hydraulic main pipe; 17. Base; 18. Piston rod; 19. Connect the ball head; 20. Skateboard mechanism; 21. Ladle.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

It is worth noting that the orientation terms such as "upper" and "lower" involved in this document are relative to the perspective of the drawings, which are only for the convenience of description, and should not be construed as limitations on the technical solution.

As shown in FIG. 1, an automatic unloading device for the oil cylinder of the ladle sliding plate mechanism of a continuous caster includes an oil inlet hydraulic manifold 16, an oil cylinder 5 and an oil return hydraulic manifold 15, the oil cylinder 5 and the oil inlet hydraulic manifold 16 and the oil return. A quick action system 1 is connected between the hydraulic main pipe 15. The oil inlet hydraulic branch pipe 6 and the oil return hydraulic branch pipe 7 are respectively led out between the oil cylinder 5 and the quick action system 1. The oil inlet hydraulic branch pipe 6 and the oil return hydraulic branch pipe 7 are respectively unloaded. The oil return branch pipe 12 is communicated with the oil return hydraulic main pipe 15 , the two unloading oil return branch pipes 12 are provided with a two-position four-way valve 13 , and the two-position four-way valve 13 corresponds to the upper and lower ends of the two unloading oil return branch pipes 12 A short-circuit branch is respectively intercepted, and a manual shut-off valve 14 is provided on the short-circuit branch; the quick-action system 1 and the two-position four-way valve 13 are both connected to the control system signal. The invention can realize the active unloading of the oil cylinder, which is convenient for the robot to automatically disassemble the oil cylinder 5, and has an emergency function to avoid the continuous casting machine from breaking the pouring. service life.

The device of the present invention has simple structure, stable operation, and convenient installation. A group of two-position four-way valves 13 for automatic unloading are newly added to the hydraulic control system of the oil cylinder 5, and the two-position four-way valve 13 can be powered and The action of losing power makes the rod cavity and rodless cavity of the oil cylinder 5 on the sliding plate mechanism 20 communicate with the oil return hydraulic main pipe 15, so that the pressure of the two chambers of the oil cylinder 5 becomes 0, that is, the automatic unloading of the oil cylinder 5 is realized. The operation difficulty of loading and unloading the cylinder 5 is reduced, the safety of the operation process is improved, and it is compatible with manual control and emergency protection measures. In the event of an abnormal fixture, the pressure of the two chambers of the cylinder can be manually unloaded by controlling the manual stop valve 14 to avoid emergency failures. down and cause the continuous casting machine to break the possibility of pouring.

In this embodiment, between the oil inlet hydraulic branch pipe 6 and the oil return hydraulic branch pipe 7 and the oil inlet hydraulic main pipe 16 and the oil return hydraulic main pipe 15, there is also a manual control action system 11 connected in parallel with the quick action system 1. The quick action system 1 is two in number and connected in parallel with each other. Both the quick action system 1 and the manual action system 11 respectively include a three-position four-way valve 2 , a hydraulic one-way valve 3 and a speed regulating valve 4 which are communicated in sequence. The 4/2-way valve and the 4/3-way valve in the quick-action system are solenoid directional valves.

The operating system controls the three-position four-way valve 2, the hydraulic check valve 3 and the speed regulating valve 4 of the quick-action system 1 to perform combined actions through signals. As shown in Figure 2, the piston rod 18 of the oil cylinder 5 drives the connecting ball 19 to push The sliding plate mechanism 20 reciprocates back and forth to control the outflow of molten steel in the ladle 21 . Compared with using only one quick action system 1, the function of setting two in this embodiment is to provide protection for the quick action system 1 that is mainly used in it, especially when sudden failures need to be repaired and maintained, in order to avoid the continuous casting machine. In case of pouring and its continuous work, the spare quick action system 1 can be used to avoid affecting the quality and efficiency of the pouring work. In addition, in order to prevent the occurrence of faults such as signal reception of the operating system, the operator can also use the manual action system 11 to complete this part of the operation. The manual action system 11 has the same principle as the quick action system 1. The operator performs on-site control, and can also be used as manual unloading of the oil cylinder 5. When a fault is found and the manual action system 11 is used for operation, it is necessary to unload the oil circuit of the system through the shut-off valves short-circuited at the upper and lower ends of the manual action system 11 to ensure that the quick action system 1 is not affected when reused .

The invention also provides a working method of the automatic unloading device of the oil cylinder of the ladle sliding plate mechanism of the continuous casting machine, comprising the following steps:

S1. After the ladle 21 has been poured with molten steel, the empty ladle 21 is transferred into the hoisting area through the ladle turntable to be hoisted away by the vehicle. At this time, the operator sends a disassembly instruction through the control system;

S2. The control system sends an electrical signal to the two-position four-way valve 13 to energize, so that the oil pressure of the rod cavity and the rodless cavity of the oil cylinder 5 is unloaded into the oil return hydraulic main pipe 15, and then loses power;

S3, the control system transmits the disassembly signal to the robot system, removes the oil cylinder 5 and grabs the oil cylinder 5 back to the standby position to wait for the installation of the next ladle 21;

S4. The ladle 21 filled with molten steel is hoisted to the ladle turntable of the continuous casting machine. At this time, the operator sends an installation instruction through the control system;

S5, the control system transmits the installation signal to the robot system, and the robot grabs the oil cylinder 5 and installs it on the ladle base 17;

S6. The operator sends a work order through the control system, and the quick action system 1 controls the molten steel to flow out to the intermediate tank for casting;

S7. After casting, repeat step S1.

The method uses a remote console and its buttons to realize remote control, and the control system adopts a PLC system, which can realize the automatic and continuous operation of the continuous casting machine, and is suitable for the working occasion of the metallurgical continuous casting machine. The method of the present invention ensures that the pressure of the rod cavity and the rodless cavity of the oil cylinder 5 is zero before and after the robot loads and unloads the oil cylinder 5. At this time, the friction force between the piston rod and the connecting ball head is weakened to zero, which is convenient for the robot to automatically unload the sliding plate mechanism 20. of cylinder 5. The method replaces manual operation by a robot, completely eliminates personnel safety accidents, and has a simple and reliable structure and is easy to maintain.

The working method of the present invention also includes an accident emergency step: after the operator finds that the two-position four-way valve 13 is faulty, the operator opens the manual stop valve 14 to perform manual unloading work, closes the manual stop valve 14 to find the fault after completion, and resumes normal work. During the use and working process, the spool of the two-position four-way valve 13 may be blocked by debris, causing the hydraulic oil circuit to be blocked, so that the normal unloading of the oil cylinder 5 of the sliding plate mechanism 20 cannot be completed; or the electrical circuit is broken, causing the two-position four-way valve. 13 can not get electricity to work normally. After the operator finds the fault, he manually pulls and opens the two manual shut-off valves 14 on the valve table, so that the unloading oil circuit is connected through the short-circuit branch to perform manual unloading work.

In step S4, after the control system sends out the installation instruction, it first sends an electrical signal to energize the two-position four-way valve 13, and then loses power, and then goes to step S5. The power-on time of the two-position four-way valve 13 is 10 seconds to ensure that the unloading of the oil circuit is completed. The purpose of opening the unloading circuit again is to ensure that the pressure of the rod cavity and the rodless cavity of the oil cylinder 5 of the sliding plate mechanism 20 is zero at this time, which is convenient for the robot to re-install the oil cylinder 5 .

In step S6, the control method of the quick action system 1 is to control the three-position four-way valve 2, the hydraulic check valve 3 and the speed regulating valve 4 in the quick action system 1, so that the hydraulic pressure of the oil inlet hydraulic manifold 16 passes through the oil inlet. The hydraulic branch pipe 6 and the oil return hydraulic branch pipe 7 are connected to each other, and the piston rod 18 of the oil cylinder 5 drives the connecting ball head 1 to push the sliding plate mechanism 20 to reciprocate; when the casting reaches the set flow rate, the three-position four-way valve 2 is lost. electricity and hold until casting is complete. The loss of power of the three-position four-way valve 2 will produce a locking effect, which can close the circuit of the oil return hydraulic main pipe 15 and the oil inlet hydraulic main pipe 16, and keep the hydraulic pressure against the sliding plate mechanism 20, so as to maintain a fixed molten steel outflow until Finish casting.

When the quick action system 1 fails, the manual control action system 11 connected in parallel with the quick action system 1 is manually controlled to complete this step, and the fault is found to return to normal work. In this method, corresponding to the working process of casting, emergency measures are also preset, and the driving of the oil cylinder 5 can also be realized by the manual control action system 11, and the upper and lower ends of the manual control action system 11 are also short-circuited with stop valves to protect the This system can be used to unload the oil circuit in the system when the system is not used in normal work.

The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (10)

1. An automatic unloading device for an oil cylinder of a ladle sliding plate mechanism of a continuous casting machine, comprising an oil inlet hydraulic main pipe, an oil cylinder and an oil return hydraulic main pipe that are connected in sequence, and the oil cylinder is connected with the oil inlet hydraulic main pipe and the oil return hydraulic main pipe. The action system is characterized in that the oil inlet hydraulic branch pipe and the oil return hydraulic branch pipe are respectively led out between the oil cylinder and the quick action system, and the oil inlet hydraulic branch pipe and the oil return hydraulic branch pipe pass through the unloading oil return branch pipe and the oil return hydraulic pressure The main pipe is connected to each other, and the two unloading oil return branch pipes are provided with two-position four-way valves, and the two-position four-way valve corresponding to the upper and lower ends of the two unloading oil return branch pipes respectively intercepts a short-circuit branch. The short-circuit branch is provided with a manual shut-off valve; the quick-action system and the two-position four-way valve are both signal-connected to the control system. 2. The automatic unloading device of the oil cylinder of the ladle sliding plate mechanism of the continuous casting machine as claimed in claim 1, wherein the oil inlet hydraulic branch pipe and the oil return hydraulic branch pipe and the oil inlet hydraulic main pipe and the oil return hydraulic main pipe are also connected. A manual action system is provided in parallel with the quick action system, and the number of the quick action systems is two and connected in parallel with each other. 3. The automatic unloading device of the oil cylinder of the ladle sliding plate mechanism of the continuous casting machine as claimed in claim 2, wherein the quick action system and the manual action system respectively comprise a three-position four-way valve and a hydraulic one-way valve that are communicated in turn. and speed control valve. 4. The automatic unloading device for the oil cylinder of the ladle sliding plate mechanism of the continuous casting machine according to claim 3, wherein the two-position four-way valve and the three-position four-way valve in the quick action system are all electromagnetic reversing valves . 5. a working method using the automatic unloading device of the oil cylinder of the continuous casting machine ladle sliding plate mechanism as described in any one of claims 1-4, is characterized in that, comprises the following steps: S1. After the ladle is poured with molten steel, the empty ladle is transferred to the hoisting area through the ladle turntable to be hoisted away. At this time, the operator sends a disassembly instruction through the control system; S2. The control system sends an electrical signal to energize the two-position four-way valve, so that the oil pressure of the rod cavity and the rodless cavity of the oil cylinder is unloaded into the oil return hydraulic main pipe, and then loses power; S3. The control system then transmits the disassembly signal to the robot system, removes the oil cylinder and grabs the oil cylinder and returns to the standby position to wait for the installation of the next ladle; S4. The ladle filled with molten steel is hoisted to the ladle turntable of the continuous casting machine. At this time, the operator sends an installation instruction through the control system; S5. The control system transmits the installation signal to the robot system, and the robot grabs the oil cylinder and installs it on the base of the ladle; S6. The operator issues work instructions through the control system, and the quick action system controls the molten steel to flow out to the intermediate tank for casting; S7. After casting, repeat step S1. 6. The working method of the automatic unloading device of the oil cylinder of the ladle sliding plate mechanism of the continuous casting machine as claimed in claim 5, it is characterized in that, also comprises the step of emergency response: after the operator finds the failure of the two-position four-way valve, open the manual stop valve to carry out the operation. Manual unloading work, close the manual stop valve to find the fault after completion, and resume normal work. 7. The working method of the automatic unloading device of the oil cylinder of the ladle sliding plate mechanism of the continuous casting machine as claimed in claim 5, wherein in the step S4, after the control system sends out the installation instruction, it first sends an electrical signal to the two-position four-way The valve is energized, and then de-energized, and then proceeds to step S5. 8. The working method of the automatic unloading device of the ladle sliding plate mechanism of the continuous casting machine according to claim 7, wherein the electrification time of the two-position four-way valve is 8-12 seconds, and the operator controls the control The way the system is controlled is through the remote console and its buttons. 9. The working method of the automatic unloading device of the ladle sliding plate mechanism of the continuous casting machine as claimed in claim 5, is characterized in that, in the described step S6, the control mode of the quick action system is to control the three-position four in the quick action system. Through valve, hydraulic check valve and speed regulating valve, the hydraulic pressure of the oil inlet hydraulic main pipe is connected to each other through the oil inlet hydraulic branch pipe and the oil return hydraulic branch pipe, and the piston rod of the oil cylinder drives the connecting ball to push the sliding plate mechanism to reciprocate. ; When the casting reaches the set flow, the three-position four-way valve will be de-energized and kept until the casting is completed. 10. The working method of the automatic unloading device of the ladle sliding plate mechanism of the continuous casting machine as claimed in claim 9, is characterized in that, when the quick action system fails, the manual control action system in parallel with the quick action system is manually controlled to complete this step , and find the fault to resume normal operation.

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