A control method and lifting device for an upward continuous casting furnace

Abstract

The present invention relates to the technical field of continuous casting, and in particular to a control method and a lifting device for an upward continuous casting furnace, wherein the lifting device is connected to a frame and realizes the lifting and lowering of the frame, a casting device is installed on the frame, and the lifting device is connected to a backup power supply. The control method comprises the following steps: S1: automatic judgment of the equipment state, the equipment state includes whether the liquid level position of the crystallizer is too high or too low, and whether the equipment is abnormally powered off: S2: if the liquid level position of the crystallizer is too high or too low or the equipment is abnormally powered off, the backup power supply is started to drive the lifting device and the frame is lifted to a safe position. The present invention improves the safety of the continuous casting equipment by judging whether the liquid level position of the crystallizer is too high or too low, whether the equipment is abnormally powered off, starting the backup power supply, and the frame rises to a safe position.

Description

Technical Field

[0001] The invention relates to the technical field of continuous casting, and in particular to a control method and a lifting device for an upward continuous casting furnace. Background Art

[0002] The principle of the upward continuous casting furnace is to utilize the mechanism of cooling and crystallization of molten metal to slowly and continuously extract solid metal wires, plates, etc. with a certain shape from the molten metal or alloy melt. However, when the state of the continuous casting equipment changes, it is generally difficult to detect. In this process, on the one hand, it affects the quality of the product and causes waste, and on the other hand, it affects the durability and maintenance cost of the equipment. Summary of the invention

[0003] In order to solve the problem in the prior art that changes in the state of the existing upward continuous casting equipment will affect the durability of the equipment, the present invention provides an upward continuous casting furnace control method and a lifting device that can improve the safety of the continuous casting equipment.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A control method for an upward continuous casting furnace includes a lifting device, the lifting device is connected to a frame and realizes the lifting of the frame, a casting device is installed on the frame, and the lifting device is connected to a backup power supply. The control method includes the following steps:

[0006] S1: Automatically judge the equipment status, including whether the liquid level of the crystallizer is too high or too low, and whether the equipment is abnormally powered off:

[0007] S2: If the liquid level of the crystallizer is too high or too low or the equipment is abnormally powered off, start the backup power supply to drive the lifting device and lift the frame to a safe position.

[0008] Furthermore, the equipment status also includes whether the cooling water temperature or flow rate reaches the warning point. If the cooling water temperature or flow rate reaches the warning point, it is determined whether there is abnormal feedback in the water pump circuit, and the corresponding control method is selected according to the water pump circuit situation:

[0009] S11: If there is no abnormal feedback in the water pump circuit, the backup power supply is started to drive the lifting device to lift the rack to a safe position;

[0010] S12: If there is abnormal feedback in the water pump circuit, switch the standby pump and determine whether there is an abnormality in the water pump circuit. When the standby pump switching times exceeds the set times, start the standby power supply to drive the lifting device to lift the rack to a safe position.

[0011] A lifting device adopts the above-mentioned upward continuous casting furnace control method, wherein the lifting device includes an elevator, and the first torque limiter and the second torque limiter are respectively connected to the two sides of the main shaft of the elevator, the first torque limiter is connected to the first drive mechanism, and the second torque limiter is connected to the second drive mechanism.

[0012] Furthermore, the first driving mechanism includes a motor, the first torque limiter is provided with a pulley, and the motor and the pulley are connected via a belt transmission.

[0013] Furthermore, the second driving mechanism includes an emergency starting motor, the first torque limiter is provided with a gear, the output end of the emergency starting motor is connected to the gear transmission, and the emergency starting motor is connected to the backup power supply.

[0014] Furthermore, the backup power supply is a battery.

[0015] Beneficial effects:

[0016] (1) The present invention improves the safety of continuous casting equipment by judging whether the liquid level of the crystallizer is too high or too low and whether the equipment is abnormally powered off, starting the backup power supply, and raising the frame to a safe position;

[0017] (2) By judging whether the cooling water temperature or flow rate has reached the warning point, comprehensively determine whether there is abnormal feedback in the water pump circuit. If the water pump circuit is normal, directly lift the rack to a safe position. If the water pump circuit is abnormal, consider switching to a backup pump. If the circuit is still abnormal after multiple switches, directly lift the rack to a safe position to prevent excessive temperature from affecting product quality and damaging equipment;

[0018] (3) The lifting device of the present invention realizes power switching through two torque limiters, and can realize emergency lifting of the frame even in the event of a power outage, thereby achieving high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the control method of the upward continuous casting furnace of the present invention;

[0021] Figure 2 It is a front structural schematic diagram of the lifting device of the present invention;

[0022] Figure 3It is a side structural schematic diagram of the lifting device of the present invention;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the lifting device of the present invention.

[0024] 1. Elevator, 2. Emergency starting motor, 3. Second torque limiter, 4. Motor, 5. Motor seat, 6. Belt, 7. Adjusting bolt, 8. Base, 9. First torque limiter, 10. Emergency starting motor seat. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0028] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0031] like Figure 1 , a control method for an upward continuous casting furnace of the present invention includes a lifting device, the lifting device is connected to a frame and realizes the lifting of the frame, the casting equipment is installed on the frame and can be lifted and lowered with the frame, the lifting device is connected to a backup power supply, and the control method includes the following steps:

[0032] S1: Automatically judge the equipment status, including whether the liquid level of the crystallizer is too high or too low, and whether the equipment is abnormally powered off:

[0033] S2: If the liquid level of the crystallizer is too high or too low or the equipment is abnormally powered off, start the backup power supply to drive the lifting device and lift the frame to a safe position.

[0034] The equipment status also includes whether the cooling water temperature or flow rate reaches the warning point. If the cooling water temperature or flow rate reaches the warning point, determine whether there is abnormal feedback in the water pump circuit and select the corresponding control method according to the water pump circuit situation:

[0035] S11: If there is no abnormal feedback in the water pump circuit, the backup power supply is started to drive the lifting device to lift the rack to a safe position;

[0036] S12: If there is abnormal feedback in the water pump circuit, switch the standby pump and determine whether there is an abnormality in the water pump circuit. When the standby pump switches more than the set number of times, start the standby power supply to drive the lifting device to lift the rack to a safe position. Generally, if the standby pump switches more than three times, the standby power supply to drive the lifting device is directly started. Of course, if the circuit is normal, the cooling water temperature or flow rate still reaches the warning point after the set time, execute step S11. In short, it is necessary to ensure that the cooling water temperature or flow rate is within a controllable range to ensure casting quality and protect equipment.

[0037] The device status of the present invention can be measured by corresponding sensors. For example, the liquid level position can be measured by a liquid level sensor, the flow rate can be measured by a flow sensor, the temperature can be measured by a temperature sensor, and so on.

[0038] like Figures 2-3 The present invention also provides an upward continuous casting lifting device, including a lift 1, and the lift 2 can be selected but not limited to a screw lift. The first torque limiter 9 and the second torque limiter 3 are respectively connected on both sides of the main shaft of the lift 1, the first torque limiter 9 is connected to a first driving mechanism, and the second torque limiter 3 is connected to a second driving mechanism.

[0039] The first driving mechanism includes a motor 4, a first torque limiter 9 with a pulley, and the motor 4 and the pulley are connected to each other through a belt 6. The motor 4 is fixed on a motor base plate 5, and the motor base plate 5 is fixed on a base 8. An adjusting bolt 7 is connected between the base 8 and the motor base plate 5 to resist the motor base plate 5 so as to adjust the position of the motor base plate 5.

[0040] The second driving mechanism comprises an emergency starter motor 2, a second torque limiter 3 is provided with a gear, an output end of the emergency starter motor 2 is connected to the gear transmission, and the emergency starter motor 2 is connected to a backup power supply. The emergency starter motor 2 is fixed on an emergency starter motor base plate 10.

[0041] During normal production, the motor 4 is connected to the first torque limiter 9 with a pulley through the belt 6 to control the normal lifting of the mechanism; when the equipment is abnormally powered off, the emergency starter motor 2 is connected to the external battery to provide power, and the emergency starter motor 2 is directly connected to the second torque limiter 3 with a gear to control the lifting of the mechanism to avoid abnormal power failure causing the equipment to fail to lift and cause damage to the equipment. When the motor 4 rotates, the second torque limiter 3 idles, and when the emergency starter motor 2 rotates, the first torque limiter 9 idles, thereby realizing the switching of the drive mechanism.

[0042] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for controlling an upward continuous casting furnace, characterized in that: The invention comprises a lifting device, the lifting device is connected to a frame and realizes the lifting of the frame, a casting device is installed on the frame, and the lifting device is connected to a backup power supply. The control method comprises the following steps: S1: Automatically judge the equipment status, including whether the liquid level of the crystallizer is too high or too low, and whether the equipment is abnormally powered off: S2: If the liquid level of the crystallizer is too high or too low or the equipment is abnormally powered off, start the backup power supply to drive the lifting device and lift the frame to a safe position.

2. The upward continuous casting furnace control method according to claim 1, characterized in that: The equipment status also includes whether the cooling water temperature or flow rate reaches the warning point. If the cooling water temperature or flow rate reaches the warning point, determine whether there is abnormal feedback in the water pump circuit and select the corresponding control method according to the water pump circuit situation: S11: If there is no abnormal feedback in the water pump circuit, the backup power supply is started to drive the lifting device to lift the rack to a safe position; S12: If there is abnormal feedback in the water pump circuit, switch the standby pump and determine whether there is an abnormality in the water pump circuit. When the standby pump switching times exceeds the set times, start the standby power supply to drive the lifting device to lift the rack to a safe position.

3. A lifting device, using the upward continuous casting furnace control method according to claim 1 or 2, characterized in that: The lifting device comprises an elevator (1), wherein a first torque limiter (9) and a second torque limiter (3) are respectively connected to two sides of a main shaft of the elevator (1), wherein the first torque limiter (9) is connected to a first driving mechanism, and the second torque limiter (3) is connected to a second driving mechanism.

4. A lifting device according to claim 3, characterized in that: The first driving mechanism comprises a motor (4), the first torque limiter (9) is provided with a pulley, and the motor (4) and the pulley are connected via a belt (6).

5. A lifting device according to claim 3, characterized in that: The second driving mechanism comprises an emergency starting motor (2), the first torque limiter (9) is provided with a gear, the output end of the emergency starting motor (2) is connected to the gear transmission, and the emergency starting motor (2) is connected to the backup power supply.

6. A lifting device according to claim 5, characterized in that: The backup power source is a battery.

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