Device for measuring liquid level height of front box of aluminum casting and rolling machine

Abstract

The utility model relates to the technical field of cold rolling mills, in particular to a liquid level height measuring device for a front box of an aluminum casting mill, which comprises a laser liquid level instrument arranged above the front box, and a control mechanism electrically connected with the laser liquid level instrument is arranged on the outer side of the front box. A first molten aluminum channel is formed in the side wall of the front box, a temporary molten aluminum storage groove is formed in the outer side of the front box, the first molten aluminum channel communicates with the temporary molten aluminum storage groove, and a second molten aluminum channel is formed in one side of the temporary molten aluminum storage groove; the control mechanism comprises a first plug used for blocking the first molten aluminum channel and a second plug used for blocking the second molten aluminum channel. The outer side of the first plug and the outer side of the second plug are each connected with a driving mechanism used for controlling the first plug and the second plug to open and close the opening of the first molten aluminum channel and the opening of the second molten aluminum channel. Under the condition that the laser liquid level instrument is not in contact with molten aluminum, the height of the liquid level in the front box can be detected and adjusted, and the stability of the height of the liquid level in the front box is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of cold rolling mills, in particular to a device for measuring the liquid level of a front box of an aluminum casting rolling mill. Background Art

[0002] The production of aluminum alloy plates and strips by casting and rolling has the characteristics of short melt crystallization time and high cooling intensity. The metal melt completes the solidification and rolling forming process of the melt in the casting and rolling zone of 45-65mm. There are few adjustable process parameters for the quality of the plate and strip in casting and rolling production. In the casting and rolling zone, the supply of the instantaneously solidified melt and the required pressure are controlled by the liquid level of the front box melt. In principle, the higher the liquid level of the front box is, the better it is, while ensuring that the oxide film on the surface of the melt is not damaged, which can ensure the continuity of the melt solidification and obtain a dense structure. The main effects of the liquid level of the front box on the sustainability of casting and rolling production and product quality are as follows: if the liquid level of the front box is low, the melt is insufficiently supplied in the casting and rolling liquid phase zone, holes are likely to appear in the center of the strip cross section, or cracks, tropical or plate hole defects are likely to appear on the surface of the strip. If the liquid level of the front box is high, it is easy to cause the oxide film on the surface of the strip to fold, reduce the surface quality of the strip or cause aluminum leakage and casting and rolling interruption.

[0003] Therefore, it is particularly important to control the height of the liquid level in the front box. However, in the prior art, it is basically measured by visual measurement and the reaction process is inaccurate and untimely, and there are great safety hazards in the operation of contacting high-temperature molten aluminum liquid, and the continuous operation is not well coordinated; in addition, there are also floating devices used for measurement, such as the Chinese patent with publication number CN210387502U, which discloses a front box aluminum liquid monitoring device for aluminum plate casting and rolling mill, which uses a high-temperature resistant floating body floating on the surface of the aluminum liquid to automatically monitor the height of the aluminum liquid level, replacing manual observation; however, its use and management have long been unreasonable, making the detection and control of the liquid level unsatisfactory; therefore, it is particularly important to explore a liquid level detection device that does not contact the aluminum liquid. Utility Model Content

[0004] The utility model aims to provide a device for measuring the liquid level in the front box of an aluminum casting rolling mill, which can detect and adjust the liquid level in the front box without contacting the aluminum liquid, thereby maintaining the stability of the liquid level in the front box.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A device for measuring the liquid level of a front box of an aluminum casting rolling mill, comprising a laser level meter arranged above the front box, a control mechanism electrically connected to the laser level meter arranged outside the front box, and the control mechanism being used to control the liquid level of aluminum liquid in the front box;

[0007] The side wall of the front box is provided with a first aluminum liquid channel, the outer side of the front box is provided with an aluminum liquid temporary storage tank, the first aluminum liquid channel is communicated with the aluminum liquid temporary storage tank; and a second aluminum liquid channel is provided on one side of the aluminum liquid temporary storage tank;

[0008] The control mechanism includes a first plug for blocking the first aluminum liquid channel and a second plug for blocking the second aluminum liquid channel.

[0009] The outer sides of the first plug and the second plug are both connected with a driving mechanism for controlling the first plug and the second plug to open and close the openings of the first aluminum liquid channel and the second aluminum liquid channel.

[0010] Furthermore, the driving mechanism includes: a first connecting arm and a second connecting arm respectively connected to the outer sides of the first plug and the second plug, and a driving device for driving the first connecting arm and the second connecting arm to rise and fall is connected to one end of the first connecting arm and the second connecting arm.

[0011] Furthermore, the driving device includes a driving motor and a telescopic rod arranged at an output end of the driving motor; the end of the telescopic rod is hinged to the end of the first connecting arm and the end of the second connecting arm.

[0012] Furthermore, a plurality of openings for the aluminum liquid to pass through are provided on the side walls of the first aluminum liquid channel and the second aluminum liquid channel.

[0013] Furthermore, at least two symmetrical side surfaces of the outer walls of the first aluminum liquid channel and the second aluminum liquid channel are provided with slide grooves, and at least two symmetrical side surfaces of the first plug and the second plug are provided with sliders, and the sliders are embedded in the slide grooves and can slide along the slide grooves.

[0014] Furthermore, the laser level meter is electrically connected to the drive motor and is also electrically connected to an external central control system.

[0015] Furthermore, the laser liquid level meter is also electrically connected to an alarm, and the alarm is electrically connected to the central control system.

[0016] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0017] The utility model has reasonable design and simple structure. Before use, the liquid level is pre-set in the central control system, and then the laser liquid level meter is used to test the liquid level in the front box, and the data is transmitted to the central control system; if it reaches or exceeds the preset height, the signal is transmitted to the control mechanism, and the control mechanism is used to control the first plug to open the first aluminum liquid channel, so that the aluminum liquid in the front box is discharged into the aluminum liquid temporary storage tank; if the laser liquid level meter detects that the liquid level in the front box reaches the preset value, the signal is transmitted to the control mechanism, and the control mechanism is used to control the first plug to close the first aluminum liquid channel, so as to maintain the stability of the liquid level in the front box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a device for measuring the liquid level in the front box of an aluminum casting and rolling mill provided by an embodiment of the utility model;

[0020] Icons: 1- central control system, 2- laser liquid level meter, 3- front box, 4- driving motor, 5- telescopic rod, 6- first connecting arm, 7- first plug, 8- first aluminum liquid channel, 9- second connecting arm, 10- second plug, 11- second aluminum liquid channel, 12- slider, 13- aluminum liquid temporary storage tank. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Example 1

[0023] A device for measuring the liquid level of a front box of an aluminum casting rolling mill, comprising a laser level meter 2 arranged above a front box 3, a control mechanism electrically connected to the laser level meter 2 is arranged outside the front box 3, and the control mechanism is used to control the liquid level of aluminum liquid in the front box 3;

[0024] The side wall of the front box 3 is provided with a first aluminum liquid channel 8, and the outer side of the front box 3 is provided with an aluminum liquid temporary storage tank 13, the first aluminum liquid channel 8 is connected with the aluminum liquid temporary storage tank 13; and a second aluminum liquid channel 11 is provided on one side of the aluminum liquid temporary storage tank 13;

[0025] The control mechanism includes a first plug 7 for plugging the first aluminum liquid channel 8 and a second plug 10 for plugging the second aluminum liquid channel 11.

[0026] The outer sides of the first plug 7 and the second plug 10 are connected to driving mechanisms for controlling the first plug 7 and the second plug 10 to open and close the openings of the first aluminum liquid channel 8 and the second aluminum liquid channel 11 .

[0027] Working principle: Before use, the utility model sets the liquid level in the central control system 1 in advance, and then uses the laser liquid level meter 2 to test the liquid level in the front box 3, and transmits the data to the central control system 1; if it reaches or exceeds the preset height, the signal is transmitted to the control mechanism, and the control mechanism is used to control the first plug 7 to open the first aluminum liquid channel 8, so that the aluminum liquid in the front box 3 is discharged into the aluminum liquid temporary storage tank 13. If the laser liquid level meter 2 detects that the liquid level in the front box 3 reaches the preset value, it will transmit the signal to the control mechanism, and use the control mechanism to control the first plug 7 to close the first aluminum liquid channel 8, so as to maintain the stability of the liquid level in the front box 3.

[0028] In addition, it should be noted that the distance between the laser level meter 2 and the front box 3 is greater than 1.5m to avoid the ambient temperature affecting the instrument measurement results, and the laser level meter 2 comes with two sets of 2*DO programmable switch signals, which can realize a closed-loop control system with the on-site quick shut-off valve or emergency discharge valve that automatically opens or closes, and the communication mode of the laser level meter 2 is RS485 communication and 4-20ma current signal, which is convenient for output to the LED display and alarm, and can also be remotely controlled by the control room; and the LED display and alarm are electrically connected to the PLC / DCS, and the PLC / DCS is electrically connected to the host computer. The laser level meter 2 and the LED display and alarm are laid with a four-core shielded cable of not less than 1.5mm2, and the cable must be protected in a metal pipe to improve transmission stability and anti-interference ability.

[0029] In this embodiment, the driving mechanism includes: a first connecting arm 6 and a second connecting arm 9 respectively connected to the outer sides of the first plug 7 and the second plug 10, and a driving device for driving the first connecting arm 6 and the second connecting arm 9 to rise and fall is connected to the adjacent ends of the first connecting arm 6 and the second connecting arm 9, and the driving device includes a driving motor 4 and a telescopic rod 5 arranged at the output end of the driving motor 4; the end of the telescopic rod 5 is hinged to the end of the first connecting arm 6 and the second connecting arm 9.

[0030] When the control mechanism is working, after the driving motor 4 receives the signal from the laser liquid level meter 2, it can start to control the extension and retraction of the telescopic rod 5, thereby driving the first connecting arm 6 and the second connecting arm 9 to rise and fall, so that the first plug 7 and the second plug 10 can reciprocate in the first aluminum liquid channel 8 and the second aluminum liquid channel 11, thereby realizing the opening and closing of the first aluminum liquid channel 8 and the second aluminum liquid channel 11.

[0031] In order to maintain the circulation effect of the aluminum liquid and prevent the plug from being separated from the aluminum liquid channel, in this embodiment, a plurality of openings for the aluminum liquid to pass through are opened on the side walls of the first aluminum liquid channel 8 and the second aluminum liquid channel 11, so that when the first plug 7 and the second plug 10 move outward in the first aluminum liquid channel 8 and the second aluminum liquid channel 11, the aluminum liquid can be retained from the openings.

[0032] In addition, in the present embodiment, at least two symmetrical side surfaces of the outer side walls of the first aluminum liquid channel 8 and the second aluminum liquid channel 11 are provided with slide grooves (not shown in the figure), and at least two symmetrical side surfaces of the first plug 7 and the second plug 10 are provided with sliders 12, and the sliders 12 are embedded in the slide grooves and can slide along the slide grooves; in this way, the normal movement of the plugs can be satisfied, and the sliders 12 can be used to be limited in the slide grooves to prevent the plugs from being separated from the aluminum liquid channel; in addition, it should be noted that a spacing is left between the end of the slide groove and the end of the aluminum liquid channel.

[0033] In this embodiment, the laser level meter 2 is electrically connected to the drive motor 4 , and is also electrically connected to an external central control system 1 .

[0034] In this embodiment, the laser level meter 2 is also electrically connected to an alarm, and the alarm is electrically connected to the central control system 1 .

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for measuring the liquid level of a front box of an aluminum casting rolling mill, characterized in that: It comprises a laser level meter arranged above the front box, and a control mechanism electrically connected to the laser level meter is arranged outside the front box, and the control mechanism is used to control the liquid level of the aluminum liquid in the front box; The side wall of the front box is provided with a first aluminum liquid channel, the outer side of the front box is provided with an aluminum liquid temporary storage tank, the first aluminum liquid channel is communicated with the aluminum liquid temporary storage tank; and a second aluminum liquid channel is provided on one side of the aluminum liquid temporary storage tank; The control mechanism includes a first plug for blocking the first aluminum liquid channel and a second plug for blocking the second aluminum liquid channel. The outer sides of the first plug and the second plug are both connected with a driving mechanism for controlling the first plug and the second plug to open and close the openings of the first aluminum liquid channel and the second aluminum liquid channel.

2. The device for measuring the liquid level of the front box of an aluminum casting rolling mill according to claim 1, characterized in that: The driving mechanism includes: a first connecting arm and a second connecting arm respectively connected to the outer sides of the first plug and the second plug, and a driving device for driving the first connecting arm and the second connecting arm to rise and fall is connected to the adjacent ends of the first connecting arm and the second connecting arm.

3. The device for measuring the liquid level of the front box of an aluminum casting rolling mill according to claim 2, characterized in that: The driving device comprises a driving motor and a telescopic rod arranged at the output end of the driving motor; the end of the telescopic rod is hinged to the end of the first connecting arm and the end of the second connecting arm.

4. The device for measuring the liquid level of the front box of an aluminum casting rolling mill according to claim 1, characterized in that: The side walls of the first aluminum liquid channel and the second aluminum liquid channel are both provided with a plurality of openings for aluminum liquid to pass through.

5. The device for measuring the liquid level of the front box of an aluminum casting rolling mill according to claim 4, characterized in that: The outer side walls of the first aluminum liquid channel and the second aluminum liquid channel have at least two symmetrical side surfaces with slide grooves, and the first plug and the second plug have at least two symmetrical side surfaces with sliders, which are embedded in the slide grooves and can slide along the slide grooves.

6. The device for measuring the liquid level of the front box of an aluminum casting rolling mill according to claim 3, characterized in that: The laser level meter is electrically connected to the driving motor and is also electrically connected to an external central control system.

7. The device for measuring the liquid level of the front box of an aluminum casting rolling mill according to claim 6, characterized in that: The laser liquid level meter is also electrically connected to an alarm, and the alarm is electrically connected to the central control system.

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