A rolling mill guard position detection construction device and double interlocking control method

Abstract

The application belongs to the technical field of industrial automation, and particularly relates to a rolling mill guard plate position detection construction device and a double interlocking control method. The device comprises a magnetic rod sensor, a mounting base, a movable magnetic ring, a weight, a steel wire rope and an automatic control system. The magnetic rod of the magnetic rod sensor is mounted on the mounting base, and the mounting base is arranged in the middle part of a rolling mill guide. The movable magnetic ring is externally arranged outside the magnetic rod sensor, and the upper end of the movable magnetic ring is connected with the rolling mill guard plate through the steel wire rope. The automatic control system is connected with the magnetic rod sensor. The steel wire rope pulls the movable magnetic ring to reciprocate along the axial direction of the magnetic rod sensor, and the signal conversion position data of the magnetic rod sensor is transmitted to the automatic control system. The application solves the problems that the proximity switch is easily damaged and mis-signals are easily generated in the harsh production environment with large water vapor, oil stains and abnormal iron oxide drop, which causes major equipment accidents and affects normal production.

Description

Technical Field

[0001] This invention belongs to the field of industrial automation technology, specifically relating to a rolling mill guard plate position detection device and a dual interlocking control method. Background Technology

[0002] Currently, the rolling mill is one of the most important pieces of equipment on a hot-rolled steel production line. It mainly consists of upper and lower support rolls and upper and lower work rolls, an EGC pressing system, an HGC system, guides and guard plates, and roll gap adjustment devices. The stable operation of each system is crucial to ensuring the smooth operation of the entire rolling mill. Furthermore, the ability to identify and protect against system malfunctions is paramount to ensuring the safe operation of the rolling mill.

[0003] The mill guard plate is a crucial piece of equipment for eliminating the gap between the rolls and the mill stand. After changing the work rolls, the guard plate's position adjustment is checked by a fixed proximity switch. When the proximity switch at the contact point illuminates, it indicates that the guard plate and roll are safely in contact. This signal acts as an interlocking protection mechanism in the system; its loss indicates a change in the contact position, and the resulting gap could lead to a major equipment accident such as steel plate entanglement on the roll. However, the proximity switch operates in harsh environments, with potential for iron oxide spillage and high moisture content, making it prone to damage. Furthermore, it frequently generates false signals, leading to a rapid mill shutdown, which not only fails to guarantee equipment safety but also significantly impacts smooth production. Summary of the Invention

[0004] This invention provides a rolling mill guard plate position detection device and a dual interlocking control method to solve the problem that proximity switches are prone to damage and generate false signals, leading to major equipment accidents and affecting normal production in harsh production environments such as high moisture content, oil pollution, and abnormal iron oxide drop.

[0005] The technical solution adopted by this invention to solve its technical problem is: a rolling mill guard plate position detection and construction device, including a rolling mill guard, a work roll, a magnetic rod sensor, a mounting base, a movable magnetic ring, a counterweight, a wire rope, and an automatic control system, wherein:

[0006] The magnetic rod of the magnetic rod sensor is mounted on a mounting base, which is located in the middle of the rolling mill guide.

[0007] The movable magnetic ring is externally mounted on the magnetic rod sensor, and the upper end of the movable magnetic ring is connected to the mill guard plate via a steel wire rope; the automatic control system is connected to the magnetic rod sensor.

[0008] The steel wire rope pulls the movable magnetic ring to reciprocate along the axis of the magnetic rod sensor, and the signal from the magnetic rod sensor is converted into position data and transmitted to the automatic control system.

[0009] As a further preferred embodiment of the present invention, the magnetic rod sensor is divided into regions C, B1, B2, A1, and A2, wherein:

[0010] When the gap between the mill guard plate and the work roll is between 0-15mm, the area where the movable magnetic ring moves on the magnetic rod sensor is zone C, which is the normal operating range.

[0011] When the gap between the mill guard plate and the work roll is between 15-20mm, the upper limit position of the movable magnetic ring corresponds to the area B1 on the magnetic rod sensor, and the lower limit position of the movable magnetic ring corresponds to the area B2 on the magnetic rod sensor. Areas B1 and B2 are the guard plate over-limit alarm ranges. The automatic control system 8 will issue an alarm to remind maintenance personnel to check on-site.

[0012] When the gap between the mill guard plate and the work roll exceeds 20mm, the upper limit position of the movable magnetic ring corresponds to the area A1 on the magnetic rod sensor, and the lower limit position of the movable magnetic ring corresponds to the area A2 on the magnetic rod sensor. Areas A1 and A2 are the mill fast stop zones. The automatic control system sends a fast stop signal to the mill, and the mill stops operating.

[0013] As a further preferred embodiment of the present invention, a counterweight is also included, one end of which is connected to the lower end of the movable magnetic ring, and the other end hangs down naturally.

[0014] As a further preferred embodiment of the invention, it also includes at least two fixed pulleys to define the running path of the wire rope.

[0015] A dual interlocking control method using the aforementioned rolling mill guard plate position detection and construction device is also provided, comprising the following steps:

[0016] Step S1, Installation Preparation:

[0017] Step S1-1: Prepare the mounting base and fix it in the middle of the rolling mill guide;

[0018] Step S1-2: Install the magnetic rod sensor on the mounting base;

[0019] Step S1-3: Place the movable magnetic ring outside the magnetic rod sensor;

[0020] Step S1-4: Connect one end of the weight to the lower end of the movable magnetic ring, and then let the other end hang down naturally;

[0021] Step S1-5: Connect the upper end of the movable magnetic ring to the rolling mill guard plate using a steel wire rope;

[0022] Step S2, Field Application:

[0023] Step S2-1: As the mill guard plate opens and closes, it pulls the wire rope, which drives the movable magnetic ring to reciprocate along the axis of the magnetic rod sensor, thereby generating corresponding displacement data, which is then transmitted to the automatic control system.

[0024] Step S2-2: The automatic control system processes the received displacement data, which has three operating conditions, as follows:

[0025] Condition 1: When the gap between the mill guard plate and the work roll is between 0-15mm, the upper and lower limits of the movable magnetic ring are in zone C. Zone C is the normal operating range, indicating that the mill guard plate is working normally and the opening and closing size is the required size.

[0026] Condition 2: When the gap between the mill guard plate and the work roll is between 15-20mm, the upper limit of the movable magnetic ring is in zone B1 and the lower limit of the movable magnetic ring is in zone B2. Zones B1 and B2 are the guard plate over-limit alarm ranges. The automatic control system receives the signal and issues an alarm to remind maintenance personnel to check on-site.

[0027] Condition 3: When the gap between the mill guard plate and the work roll exceeds 20mm, the upper limit of the movable magnetic ring is in zone A1 and the lower limit of the movable magnetic ring is in zone A2. Zones A1 and A2 are the mill fast stop zones. The automatic control system sends a fast stop signal to the mill, and the mill stops operating.

[0028] By employing the above technical solutions, the present invention has the following beneficial effects compared to the prior art:

[0029] 1. This invention solves the problem that proximity switches are prone to damage and generate false signals, leading to major equipment accidents and affecting normal production in harsh production environments such as high moisture content, oil pollution, and abnormal iron oxide drop.

[0030] 2. The present invention combines a mounting base, a magnetic rod sensor, a movable magnetic ring, and a steel wire rope, so that the opening and closing of the rolling mill guard plate will pull the steel wire rope, drive the magnetic ring to move up and down, and thus generate corresponding displacement data, which is transmitted to the automatic control system.

[0031] 3. This invention records and tracks on-site data, and selects a reasonable position range for the magnetic rod sensor by debugging. It divides the range into A1, A2, B1, B2, and C zones. Zones A1 and A2 are the rolling mill quick stop zones, zones B1 and B2 are the guard plate over-limit alarm zones, and zone C is the normal operation zone.

[0032] 4. The present invention is equipped with a counterweight, the function of which is to tighten the wire rope between the movable magnetic ring and the mill guard plate. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Figure 1 This is a simplified structural diagram of the mill guard plate position detection device of the present invention.

[0035] In the diagram: 1. Rolling mill guide; 2. Mounting base; 3. Magnetic rod sensor; 4. Movable magnetic ring; 5. Counterweight; 6. Steel wire rope; 7. Rolling mill guard plate; 8. Automatic control system; 9. Fixed pulley. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0037] In the description of this invention, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this invention. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of this invention.

[0038] Example 1

[0039] This embodiment provides a preferred implementation scheme, such as... Figure 1 As shown, a rolling mill guard plate position detection device includes a rolling mill guard 1, a work roll, a magnetic rod sensor 3, a mounting base 2, a movable magnetic ring 4, a counterweight 5, a wire rope 6, and an automatic control system 8, wherein:

[0040] The magnetic rod of the aforementioned magnetic rod sensor 3 is mounted on the mounting base 2, which is located in the middle of the rolling mill guide 1.

[0041] The aforementioned movable magnetic ring 4 is externally mounted on the magnetic rod sensor 3, and the upper end of the movable magnetic ring 4 is connected to the rolling mill guard plate 7 via a steel wire rope 6; the automatic control system 8 is connected to the magnetic rod sensor 3.

[0042] The aforementioned wire rope 6 pulls the movable magnetic ring 4 to reciprocate along the axis of the magnetic rod sensor 3, and the signal conversion position data of the magnetic rod sensor 3 is transmitted to the automatic control system 8.

[0043] Specifically, the magnetic rod sensor 3 is divided into areas C, B1, B2, A1, and A2, where:

[0044] When the gap between the mill guard plate 7 and the work roll is between 0-15mm, the area where the movable magnetic ring 4 moves on the magnetic rod sensor 3 is zone C, which is the normal operating range.

[0045] When the gap between the mill guard plate 7 and the work roll is between 15-20mm, the upper limit position of the movable magnetic ring 4 corresponds to the area B1 on the magnetic rod sensor 3, and the lower limit position of the movable magnetic ring 4 corresponds to the area B2 on the magnetic rod sensor 3. Areas B1 and B2 are the guard plate over-limit alarm ranges, and the automatic control system 8 will issue an alarm to remind maintenance personnel to conduct on-site inspection; area B1 is located above area C, and area B2 is located below area C.

[0046] When the gap between the mill guard plate 7 and the work roll exceeds 20mm, the upper limit position of the movable magnetic ring 4 corresponds to area A1 on the magnetic rod sensor 3, and the lower limit position of the movable magnetic ring 4 corresponds to area A2 on the magnetic rod sensor 3. Areas A1 and A2 are the mill's fast stop zones. The automatic control system 8 sends a fast stop signal to the mill, and the mill stops operating. Area A1 is located above area B1, and area A2 is located below area B2.

[0047] This implementation scheme also includes a counterweight 5, one end of which is connected to the lower end of the movable magnetic ring 4, and the other end hangs down naturally. The function of the counterweight 5 is to tighten the steel wire rope 6 between the movable magnetic ring 4 and the mill guard plate 7. When the mill guard plate 7 shakes, the movable magnetic ring 4 is pulled up and down by the steel wire rope 6.

[0048] This implementation scheme also includes at least two fixed pulleys 9, which are arranged on the path of the wire rope 6, thereby limiting the running route of the wire rope 6 through the fixed pulleys 9, and realizing the linkage between the opening and closing of the mill guard plate 7 and the movable magnetic ring 4.

[0049] This implementation scheme also provides a dual interlocking control method using the above-mentioned rolling mill guard plate position detection and construction device, including the following steps:

[0050] Step S1, Installation Preparation:

[0051] Step S1-1: Prepare the mounting base 2 and fix the mounting base 2 in the middle of the rolling mill guide 1;

[0052] Step S1-2: Install the magnetic rod sensor 3 on the mounting base 2;

[0053] Steps S1-3: Place the movable magnetic ring 4 around the outside of the magnetic rod sensor 3;

[0054] Specifically, the magnetic rod sensor 3 converts the signal into position data and transmits it to the automatic control system 8, where it is then used for logical calculation. This displacement is used to calculate the specific gap between the mill guard plate 7 and the roll. The size of this gap is compared with the set alarm and fast stop data to trigger the corresponding level of interlocking protection.

[0055] Step S1-4: Connect one end of the weight 5 to the lower end of the movable magnetic ring 4, and then let the other end hang down naturally;

[0056] Step S1-5: Connect the upper end of the movable magnetic ring 4 to the rolling mill guard plate 7 using steel wire rope 6;

[0057] Preferably, the wire rope 6 is 2m long and is connected to the opening and closing edge of the rolling mill guard plate 7.

[0058] Step S2, Field Application:

[0059] Step S2-1: As the mill guard plate opens and closes, it pulls the wire rope 6, which drives the movable magnetic ring 4 to reciprocate along the axis of the magnetic rod sensor 3, thereby generating corresponding displacement data, which is then transmitted to the automatic control system 8.

[0060] Step S2-2: The automatic control system 8 processes the received displacement data, which has three operating conditions, as follows:

[0061] Specifically, the position gap of the mill guard plate 7 calculated by the automatic control system 8 is compared with the set guard plate over-limit alarm range and mill fast stop range, thereby triggering the corresponding logic to generate the corresponding alarm or mill fast stop signal interlock, so as to achieve the effect of protecting equipment safety.

[0062] Condition 1: When the gap between the mill guard plate and the work roll is between 0-15mm, the upper and lower limit positions of the movable magnetic ring 4 are in zone C. Zone C is the normal operating range, indicating that the mill guard plate is working normally and the opening and closing size is the required size.

[0063] Condition 2: When the gap between the mill guard plate and the work roll is between 15-20mm, the upper limit of the movable magnetic ring 4 is in zone B1 and the lower limit of the movable magnetic ring 4 is in zone B2. Zones B1 and B2 are the guard plate over-limit alarm ranges. The automatic control system 8 receives the signal and alarms, reminding maintenance personnel to check on-site.

[0064] Condition 3: When the gap between the mill guard plate and the work roll exceeds 20mm, the upper limit of the movable magnetic ring 4 is in zone A1 and the lower limit of the movable magnetic ring 4 is in zone A2. Zones A1 and A2 are the mill fast stop zones. The automatic control system 8 sends a fast stop signal to the mill, and the mill stops operating. The mill is prohibited from continuing to operate to avoid causing a larger equipment accident.

[0065] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0066] The meaning of "and / or" as used in this application includes situations where each exists alone or both exist simultaneously.

[0067] The term "connection" as used in this application can mean a direct connection between components or an indirect connection between components through other components.

[0068] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A mill guard position detection construction device, comprising a mill guide guard, a work roll, characterized in that: The utility model relates to a kind of magnetic rod sensor, installation base, movable magnetic ring, weight, steel wire rope, automatic control system, wherein: The magnetic rod of magnetic rod sensor is installed on installation base, and installation base is arranged in the middle of rolling mill guide; Movable magnetic ring is externally arranged outside magnetic rod sensor, and the upper end of movable magnetic ring is connected with rolling mill guard plate through steel wire rope;Automatic control system is connected with magnetic rod sensor; Steel wire rope pulls movable magnetic ring to reciprocate along the axial direction of magnetic rod sensor, and the signal conversion position data of magnetic rod sensor is transmitted to automatic control system; Magnetic rod sensor is divided into C area, B1 area, B2 area, A1 area and A2 area, wherein: When the gap between rolling mill guard plate and work roll is between 0-15mm, the moving area of movable magnetic ring on magnetic rod sensor is C area, and C area is normal operation interval; When the gap between rolling mill guard plate and work roll is between 15-20mm, the upper limit position of movable magnetic ring corresponds to B1 area on magnetic rod sensor, and the lower limit position of movable magnetic ring corresponds to B2 area on magnetic rod sensor, B1 area and B2 area are guard plate out-of-limit alarm interval, and automatic control system alarms to remind maintenance personnel to check on site; When the gap between rolling mill guard plate and work roll exceeds 20mm, the upper limit position of movable magnetic ring corresponds to A1 area on magnetic rod sensor, and the lower limit position of movable magnetic ring corresponds to A2 area on magnetic rod sensor, A1 area and A2 area are rolling mill fast stop interval, and automatic control system sends fast stop signal to rolling mill to stop action.

2. A mill guard position detection arrangement according to claim 1, characterized in that: It also includes a weight, one end of which is connected to the lower end of the movable magnetic ring, and the other end naturally droops.

3. A mill stripper position detection arrangement according to claim 2, characterised in that: It also includes at least two fixed pulleys that define the running route of the steel wire rope.

4. A double interlock control method using the mill guard position detection construction device according to any one of claims 1 to 3, characterized by, The utility model includes the following steps: Step S1, installation preparation: Step S1-1, prepare installation base and fix it in the middle of rolling mill guide; Step S1-2, install magnetic rod sensor on installation base; Step S1-3, externally arrange movable magnetic ring outside magnetic rod sensor; Step S1-4, connect one end of weight to the lower end of movable magnetic ring, and then let the other end naturally droop; Step S1-5, connect the upper end of movable magnetic ring to rolling mill guard plate through steel wire rope; Step S2, on-site application: Step S2-1, as rolling mill guard plate opens and closes up and down, it pulls steel wire rope, drives movable magnetic ring to reciprocate along the axial direction of magnetic rod sensor, and then generates corresponding displacement data, which is transmitted to automatic control system; Step S2-2, automatic control system processes received displacement data, which has three working conditions, as follows: Working condition one, when the gap between rolling mill guard plate and work roll is between 0-15mm, the upper and lower limit positions of movable magnetic ring are in C area, C area is normal operation interval, which indicates that rolling mill guard plate is working normally, and the opening and closing size is as required; Working condition two, when the gap between rolling mill guard plate and work roll is between 15-20mm, the upper limit position of movable magnetic ring is in B1 area, and the lower limit position of movable magnetic ring is in B2 area, B1 area and B2 area are guard plate out-of-limit alarm interval, and automatic control system alarms to remind maintenance personnel to check on site; Working condition three, when the gap between rolling mill guard plate and work roll exceeds 20mm, the upper limit position of movable magnetic ring is in A1 area, and the lower limit position of movable magnetic ring is in A2 area, A1 area and A2 area are rolling mill fast stop interval, and automatic control system sends fast stop signal to rolling mill to stop action. When the gap between the mill backup roll and the work roll exceeds 20 mm in the third working condition, the upper limit position of the movable magnetic ring is in the A1 area, the lower limit position of the movable magnetic ring is in the A2 area, the A1 area and the A2 area are the mill fast stopping area, the automatic control system sends a fast stopping signal to the mill, and the mill stops moving.

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