A protective device and method for preventing rolling mill pressure head from spinning

Abstract

The present invention belongs to the field of steel plate production equipment, and relates to a protective device and method for preventing the rolling mill pressure head from rotating, comprising a finishing mill frame, an upper support roller bearing seat assembled on the finishing mill frame through an upper roller system lifting cylinder, a support roller installed in the upper support roller bearing seat, and a pressure head machine base and a pressing screw arranged above the upper support roller bearing seat; a position detection device is installed on the pressure head machine base, and the upper support roller bearing seat is provided with an induction block, and the position detection device is also connected to a control system. The present invention can detect the fitting state of the pressure head machine base and the upper roller system of the finishing mill in real time. When the pressure head machine base is separated from the upper roller system of the finishing mill, the detection signal can detect the separation signal, and the rolling mill control system realizes the automatic locking function of the pressing motor according to the detection signal, thereby achieving the purpose of preventing the pressure head from rotating; the method is simple to implement, flexible and convenient, and can be implemented without adding any hardware, and the effect is good.

Description

Technical Field

[0001] The invention belongs to the field of steel plate production equipment and relates to a protective device and method for preventing a rolling mill pressure head from rotating. Background Art

[0002] The pressure sensor of the finishing mill of the medium and thick plate production line is the core detection and control element of the finishing mill thickness automatic control system. The finishing mill pressure sensor is installed in the pressure head machine base of the pressing screw at both ends of the rolling mill. The pressure head machine base and the upper roller system of the rolling mill are physically separated. To ensure that the pressure head machine base and the upper roller system of the finishing mill are tightly fitted, this requires that the main balance cylinder of the finishing mill drives the upper support roller bearing seat to use the overload balancing force to always fit the pressing screw and the pressure head machine base into the keyway of the upper support roller bearing seat of the rolling mill. During the rotation and up and down movement of the pressing screw, it can ensure that the pressure head machine base and the upper support roller bearing seat of the rolling mill are effectively fitted to avoid the finishing pressure head from spinning.

[0003] However, in the actual production process, due to the pressure fluctuation of the main balance cylinder of the rolling mill or the jamming of the upper roller system bearing seat during the up and down movement, the upper support roller bearing seat of the upper roller system of the rolling mill and the ram machine seat under the pressing screw cannot be effectively fitted, and the ram machine seat disengages from the keyway of the upper support roller bearing seat during the movement, and the upper support roller bearing seat and the ram machine seat will be separated. At this time, the rotation of the pressing screw will drive the ram machine seat to be installed. When the ram machine seat and the pressing screw rotate, the pressure sensor in the ram machine seat will also rotate with it, which can easily cause the pressure sensor transmission line to break from the root, thereby causing a production stoppage accident of the medium and thick plate production line. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a protection device and method for preventing the rolling mill ram from rotating, which can detect the fitting state of the ram frame and the upper roller system of the finishing mill in real time and realize locking protection when the ram frame and the upper roller system of the finishing mill are separated, and give real-time alarm.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a protective device for preventing the rolling mill pressure head from rotating, comprising a finishing mill frame, an upper support roller bearing seat assembled on the finishing mill frame through an upper roller system lifting cylinder, a support roller installed in the upper support roller bearing seat, and a pressure head machine seat and a pressing screw arranged above the upper support roller bearing seat; a position detection device is installed on the pressure head machine seat, the upper support roller bearing seat is provided with an induction block, and the position detection device is also connected to a control system.

[0006] Optionally, the screw down screw and the press head base are assembled in a spherical hinge manner, and the screw down screw is assembled on the finishing mill frame in a spiral structure.

[0007] Optionally, a finishing mill pressure sensor is also installed in the press head base.

[0008] Optionally, a keyway is provided on the top of the upper support roller bearing seat, and the pressure head seat fits in the keyway of the upper support roller bearing seat.

[0009] Optionally, the control system includes a depression drive system connected to the depression screw, a field signal ET200 station connected to the position detection device, a programmable controller connected to the depression drive system and the field signal ET200 station, and an alarm device connected to the programmable controller.

[0010] Optionally, the alarm device includes a buzzer, an alarm indicator light and a fault reset button.

[0011] Optionally, the position detection device is a diffuse reflection type cold metal detector, the induction block is an upper bearing seat induction contact, and the diffuse reflection type cold metal detector and the upper bearing seat induction contact are arranged relatively without contact.

[0012] A protection method for preventing a rolling mill pressure head from spinning, using a protection device for preventing a rolling mill pressure head from spinning as described above, comprises the following steps:

[0013] S1, the upper roller lifting cylinder uses the overload balancing force to tightly fit the upper support roller bearing seat and the pressure head machine seat, and the pressure head machine seat fits into the keyway of the upper support roller bearing seat. At this time, the induction block and the position detection device are in the relative induction position, and the position detection device detects that it is in the energized state. The programmable controller allows the pressing drive system to realize the up and down movement of the pressing screw;

[0014] S2, when the pressure system of the upper roller system lifting cylinder fluctuates or the upper roller system bearing seat is blocked during movement, when the programmable controller controls the pressing screw to move up and down, if the upper support roller bearing seat is separated from the pressure head machine base, that is, the sensing block and the position detection device are not in the relative sensing position, the position detection device detects that it is in a power-off state. The programmable controller will lock the pressing drive system in time according to the loss of state signal of the upper bearing seat and the pressure head machine base to prevent the pressing screw from continuing to move, thereby preventing the pressure head from spinning;

[0015] S3: After manually restoring the on-site fault status and confirming that the information is correct, the alarm is released by pressing the fault reset button and the system returns to its initial state.

[0016] Optionally, in step S2, when the position detection device detects that it is in a power-off state, the programmable controller will automatically control the pressing drive system to implement the locking control of the pressing motor, and send out an alarm message through the operating console ET200 station, the buzzer will sound, and the alarm indicator light will flash.

[0017] The beneficial effects of the present invention are as follows: a protective device and method for preventing the rolling mill pressure head from spinning can detect the fitting state of the pressure head frame and the upper roller system of the finishing mill in real time. When the pressure head frame is disengaged from the upper roller system of the finishing mill, the detection signal can detect the disengagement signal, and the rolling mill control system realizes the automatic locking function of the pressing motor according to the detection signal, thereby achieving the purpose of preventing the pressure head from spinning; the method is simple to implement, flexible and convenient, can be implemented without adding any hardware, and has a good effect.

[0018] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 The present invention is an overall schematic diagram of a protective device and method for preventing a rolling mill pressure head from spinning.

[0021] Figure numerals: finishing mill frame 1, support roller 2, upper support roller bearing seat 3, upper roller lifting cylinder 4, upper bearing seat induction contact 5, pressure head base 6, pressing screw 7, diffuse reflection cold metal detector 8, field signal ET200 station 9, pressing drive system 10, programmable controller 11, operating console ET200 station 12, buzzer 13, alarm indicator light 14, fault reset button 15. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0023] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] See also Figure 1 , which is a protective device for preventing the rolling mill pressure head from rotating, comprising a finishing mill frame 1, an upper support roller bearing seat 3 assembled on the finishing mill frame 1 through an upper roller system lifting cylinder 4, a support roller 2 installed in the upper support roller bearing seat 3, and a pressure head machine base 6 and a pressing screw 7 arranged above the upper support roller bearing seat 3; a position detection device is installed on the pressure head machine base 6, the upper support roller bearing seat 3 is provided with an induction block, the position detection device is also connected to a control system, the pressing screw 7 and the pressure head machine base 6 are assembled in a spherical hinge manner, and the pressing screw 7 is assembled on the finishing mill frame 1 in a spiral structure. On the machine frame 1, a finishing mill pressure sensor is also installed in the ram base 6, a key slot is provided on the top of the upper support roller bearing seat 3, and the ram base 6 fits in the key slot of the upper support roller bearing seat 3. The control system includes a depression drive system 10 connected to the depression screw 7, a field signal ET200 station 9 connected to the position detection device, a programmable controller 11 connected to the depression drive system 10 and the field signal ET200 station 9, and an alarm device connected to the programmable controller 11, and the alarm device includes a buzzer 13, an alarm indicator light 14 and a fault reset button 15.

[0026] In this embodiment, the position detection device is a diffuse reflection cold metal detector 8, the sensing block is the upper bearing seat sensing contact 5, the diffuse reflection cold metal detector 8 and the upper bearing seat sensing contact 5 are arranged relatively non-contacting, the diffuse reflection cold metal detector 8 and the upper bearing seat sensing contact 5 cooperate with each other, and are used to detect the fitting state of the upper bearing seat and the press head machine base 6 in real time, and transmit the fitting state signal of the upper bearing seat and the press head machine base 6 to the programmable controller 11 through the field signal ET200 station 9.

[0027] In this embodiment, the programmable controller 11 controls the movement of the pressing drive system 10 according to the real-time fitting state signal of the upper bearing seat and the pressing head seat 6.

[0028] A protection method for preventing a rolling mill pressure head from spinning, using a protection device for preventing a rolling mill pressure head from spinning as described above, comprises the following steps:

[0029] S1, the upper roller system lifting cylinder 4 uses the overload balancing force to tightly fit the upper support roller bearing seat 3 and the pressure head machine seat 6, and the pressure head machine seat 6 fits in the keyway of the upper support roller bearing seat 3. At this time, the induction block and the position detection device are in a relative sensing position, and the position detection device detects that it is in a powered state. The programmable controller 11 allows the pressing drive system 10 to realize the up and down movement of the pressing screw 7;

[0030] S2, when the pressure system of the upper roller system lifting cylinder 4 fluctuates or the upper roller system bearing seat is blocked during movement, the programmable controller 11 controls the pressing screw 7 to move up and down. If the upper support roller bearing seat 3 is separated from the pressure head machine base 6, that is, the sensing block and the position detection device are not in the relative sensing position, the position detection device detects that it is in a power-off state. The programmable controller 11 will lock the pressing drive system 10 in time according to the state loss signal of the upper bearing seat and the pressure head machine base 6 to prevent the pressing screw 7 from continuing to move, thereby preventing the pressure head from spinning;

[0031] When the position detection device detects that it is in a power-off state, the programmable controller 11 will automatically control the pressing drive system 10 to realize the locking control of the pressing motor, and send out an alarm message through the operation console ET200 station 12, the buzzer 13 will sound a buzzer, and the alarm indicator light 14 will flash an alarm;

[0032] S3, when the on-site fault state is manually restored and the information is confirmed to be correct, the alarm is released by pressing the fault reset button 15, and the system returns to the initial state.

[0033] The present invention can detect the fitting state of the ram machine base 6 and the upper roller system of the finishing mill in real time. When the ram machine base 6 is separated from the upper roller system of the finishing mill, the detection signal can detect the separation signal, and the rolling mill control system realizes the automatic locking function of the pressing motor according to the detection signal. By real-time detecting the fitting state of the ram machine base 6 and the upper roller system of the finishing mill, the rolling mill control system is used to realize the locking protection when the ram machine base 6 is separated from the upper roller system of the finishing mill, and the alarm is given in real time. The technical means are used to avoid the shutdown accident of the finishing mill, and the smooth production is ensured. The protection device has a simple structure, reliable detection, and effective protection. The safety factor of the finishing mill pressing system is improved, the failure time of the pressure sensor caused by the rotation of the ram in the production process of medium and thick plates is reduced, and the rolling production efficiency of medium and thick plates is effectively improved.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A protection method for preventing a rolling mill pressure head from spinning, characterized in that: A protective device for preventing a rolling mill pressure head from spinning is applied, the device comprising a finishing mill frame, an upper support roller bearing seat assembled on the finishing mill frame through an upper roller system lifting cylinder, a support roller installed in the upper support roller bearing seat, and a pressure head machine base and a pressing screw arranged above the upper support roller bearing seat; a position detection device is installed on the pressure head machine base, an upper support roller bearing seat is provided with an inductive block, and the position detection device is also connected to a control system; the control system comprises a pressing drive system connected to the pressing screw, a field signal ET200 station connected to the position detection device, a programmable controller connected to the pressing drive system and the field signal ET200 station, and an alarm device connected to the programmable controller; the alarm device comprises a buzzer, an alarm indicator light and a fault reset button; the position detection device is a diffuse reflection type cold metal detector, the inductive block is an upper bearing seat inductive contact, and the diffuse reflection type cold metal detector and the upper bearing seat inductive contact are arranged relatively non-contacting; The protection method further comprises the following steps: S1, the upper roller lifting cylinder uses the overload balancing force to tightly fit the upper support roller bearing seat and the pressure head machine seat, and the pressure head machine seat fits into the keyway of the upper support roller bearing seat. At this time, the induction block and the position detection device are in the relative induction position, and the position detection device detects that it is in the energized state. The programmable controller allows the pressing drive system to realize the up and down movement of the pressing screw; S2, when the pressure system of the upper roller system lifting cylinder fluctuates or the upper roller system bearing seat is blocked during movement, when the programmable controller controls the pressing screw to move up and down, if the upper support roller bearing seat is separated from the pressure head machine base, that is, the sensing block and the position detection device are not in the relative sensing position, the position detection device detects that it is in a power-off state. The programmable controller will lock the pressing drive system in time according to the loss of state signal of the upper bearing seat and the pressure head machine base to prevent the pressing screw from continuing to move, thereby preventing the pressure head from spinning; When the position detection device detects that it is in a power-off state, the programmable controller will automatically control the pressing drive system to realize the locking control of the pressing motor, and send out an alarm message through the operating console ET200 station, the buzzer will sound, and the alarm indicator will flash; S3: After manually restoring the on-site fault status and confirming that the information is correct, the alarm is released by pressing the fault reset button and the system returns to its initial state.

2. A protection method for preventing a rolling mill pressure head from spinning according to claim 1, characterized in that: The pressing screw and the pressing head base are assembled in a spherical hinge manner, and the pressing screw is assembled on the finishing mill frame in a spiral structure.

3. A protection method for preventing a rolling mill pressure head from spinning according to claim 2, characterized in that: A finishing mill pressure sensor is also installed in the pressure head base.

4. A protection method for preventing a rolling mill pressure head from spinning according to claim 1, characterized in that: A keyway is provided on the top of the upper support roller bearing seat, and the pressure head machine seat fits in the keyway of the upper support roller bearing seat.

Images