Aluminum-lithium alloy air curtain laser failure prevention device

Abstract

The invention discloses an air curtain laser failure prevention device for an aluminum-lithium alloy, and relates to the technical field of aluminum-lithium alloy ingots. The air curtain laser failure prevention device comprises a glass sheet located right in front of the laser range finder, a glass upper cover plate arranged on the side face, close to the laser range finder, of the glass sheet, a glass lower cover plate arranged on the side face, away from the laser range finder, of the glass sheet and a ventilation pipeline arranged on the side portion of the glass lower cover plate, and the ventilation pipeline is used for outputting inert gas. The side face, away from the laser range finder, of the glass sheet is purged, and an inert gas protection layer is formed. The inert gas is introduced into the ventilation pipeline at one side of the glass lower cover plate below the laser irradiation glass, and the lower part of the glass sheet is continuously purged, so that an inert gas protection air curtain is formed below the glass sheet, dust and the like can be effectively prevented from being attached to the upper glass sheet, the glass is kept clean, the laser failure is prevented, and the service life of the glass sheet is prolonged. And meanwhile, aluminum alloy oxidation of the launder can be reduced or even avoided through introduction of inert gas, and the ingot casting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum-lithium alloy ingot casting, and in particular to an air curtain laser failure prevention device for aluminum-lithium alloy. Background Art

[0002] In the aluminum-lithium alloy casting process, it is usually necessary to accurately control the metal level in the launder and the crystallizer. Currently, laser ranging is widely used in the industry to achieve this.

[0003] Laser rangefinder is an instrument that uses laser to accurately measure the distance to the target. When the laser sensor is working, the laser emitting diode first emits laser pulses at the target. After being reflected by the target, the laser is scattered in all directions. Part of the scattered light returns to the sensor receiver and is received by the optical system and imaged on the avalanche photodiode. The avalanche photodiode is an optical sensor with an internal amplification function, so it can detect extremely weak light signals and convert them into corresponding electrical signals. It can measure the target distance by recording and processing the time from the light pulse being sent to the return being received.

[0004] The advantages of laser rangefinders are low cost, light weight, small size, high precision, simple operation, fast and accurate speed. Its error is only one-fifth to several hundredths of that of other optical rangefinders, and the accuracy can reach ±1 mm.

[0005] However, due to its own characteristics, it also has disadvantages. For example, the laser beam is easily affected by external stray light, thick smoke, thick fog, and hot air flow, causing attenuation, distortion, and jitter, which affects the measurement. In aluminum-lithium alloy casting, there is often smoke and fog at the laser detection point. One reason is that the aluminum liquid is oxidized by oxygen and water in the air, or reacts with the residual oil on the tooling to produce smoke; the other reason is that a large amount of water mist is generated when the ingot is formed by water cooling. The dust particles and water particles in the smoke and water mist will absorb and reflect the laser, causing its energy to decay, resulting in unstable data or even failure.

[0006] The current solutions to this problem are as follows:

[0007] (1) Replace the laser distance measurement with the capacitive distance measurement. However, the capacitive distance measurement is large in size, expensive, and easily restricted by the width of the flow channel. It is not suitable for all working conditions. The accuracy of the capacitive distance measurement is much lower than that of the laser distance measurement, which has a great impact on castings that require precise control of the metal liquid level.

[0008] (2) Replace with ultrasonic distance measurement, but ultrasonic distance measurement is also easily affected by smoke and noise. In addition, the application scenarios of ultrasonic distance meters are limited. They are suitable for open metal liquid surface production, but not for fully enclosed protection production. Summary of the invention

[0009] The purpose of the present invention is to provide an air curtain laser failure prevention device of aluminum-lithium alloy, which has a simple structure, can ensure that the laser is not affected by dust, and improve the accuracy of liquid level detection.

[0010] To solve the above technical problems, an embodiment of the present invention provides an air curtain laser failure prevention device of aluminum-lithium alloy, comprising a glass sheet located directly in front of a laser rangefinder, a glass upper cover plate arranged on the side of the glass sheet close to the laser rangefinder, a glass lower cover plate arranged on the side of the glass sheet away from the laser rangefinder, and a ventilation duct arranged on the side of the glass lower cover plate, wherein the ventilation duct is used to output an inert gas, purge the side of the glass sheet away from the laser rangefinder and form an inert gas protection layer, wherein the inert gas protection layer is an argon protection layer, a xenon protection layer or a helium protection layer.

[0011] Wherein, the longitudinal section of the connection between the ventilation duct and the lower glass cover plate is rectangular.

[0012] Wherein, the width of the rectangle is 5-10 mm.

[0013] Wherein, the ventilation duct is a copper ventilation duct or an aluminum alloy ventilation duct.

[0014] Wherein, it also includes a pressure regulating valve arranged in the ventilation pipeline.

[0015] Among them, it also includes a flow meter arranged in the ventilation pipeline.

[0016] Wherein, it also includes a valve arranged on the ventilation duct.

[0017] Wherein, it also includes a display connected with the pressure regulating valve, the flow meter and the valve, which is used to display the operating data of the pressure regulating valve, the flow meter and the valve.

[0018] Among them, it also includes a wireless communication module connected to the pressure regulating valve, the flow meter and the valve, which is used to output the operating data of the pressure regulating valve, the flow meter and the valve or control the operating status of the pressure regulating valve, the flow meter and the valve.

[0019] The aluminum-lithium alloy air curtain laser failure prevention device provided in the embodiment of the present invention has the following advantages compared with the prior art:

[0020] The air curtain laser failure prevention device for aluminum-lithium alloy provided in the embodiment of the present invention continuously purges the bottom of the glass sheet by introducing inert gas through the ventilation duct on the side of the glass lower cover plate below the laser irradiated glass, so as to form an inert gas protection air curtain under the glass sheet. This can effectively prevent dust and the like from adhering to the glass sheet, keep the glass clean, ensure that the laser is not affected by dust, prevent laser failure, and improve the accuracy of liquid level detection. At the same time, the introduction of inert gas can reduce or even avoid the oxidation of the aluminum-lithium alloy in the flow channel, thereby improving the efficiency of ingot casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of a specific implementation of an air curtain laser failure prevention device for aluminum-lithium alloy provided in an embodiment of the present invention;

[0023] Among them, 1-filter, 2-pressure regulating valve, 3-flow meter, 4-ventilation pipe, 5-laser rangefinder, 6-glass upper cover, 7-glass sheet, 8-glass lower cover, 9-flow channel cover, 10-aluminum liquid, 11-inside the flow channel. DETAILED DESCRIPTION

[0024] 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, not all of the embodiments. 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.

[0025] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a specific implementation of an air curtain laser failure prevention device for an aluminum-lithium alloy provided in an embodiment of the present invention.

[0026] In a specific embodiment, the air curtain laser failure prevention device of the aluminum-lithium alloy includes a glass sheet 7 located directly in front of the laser rangefinder 5, a glass upper cover plate 6 arranged on the side of the glass sheet 7 close to the laser rangefinder 5, a glass lower cover plate 8 arranged on the side of the glass sheet 7 away from the laser rangefinder 5, and a ventilation duct 4 arranged on the side of the glass lower cover plate 8, wherein the ventilation duct 4 is used to output inert gas to purge the side of the glass sheet 7 away from the laser rangefinder 5 and form an inert gas protection layer.

[0027] By introducing inert gas through the ventilation duct 4 on the side of the glass lower cover plate 8 below the laser irradiated glass, the bottom of the glass sheet 7 is continuously purged to form an argon protective gas curtain under the glass sheet 7. This can effectively prevent dust and the like from adhering to the glass sheet, keep the glass sheet clean, ensure that the laser is not affected by dust, prevent laser failure, and improve the accuracy of liquid level detection. At the same time, the introduction of inert gas can reduce or even avoid the oxidation of the aluminum-lithium alloy in the flow channel, thereby improving the efficiency of ingot casting.

[0028] Since the cross section of the ventilation duct 4 is generally circular, it is not conducive to subsequent purging. In order to solve this technical problem, in one embodiment, the longitudinal cross section of the connection between the ventilation duct 4 and the lower glass cover plate 8 is rectangular.

[0029] By flattening the end of the ventilation duct 4 into a rectangle, or connecting a rectangular connector, the airflow changes from a cylindrical shape to a flat shape after entering the glass sheet 7, thereby increasing the sweeping area and sweeping efficiency of the glass sheet 7.

[0030] The present application does not limit the specific size of the rectangle, and generally the width of the rectangle is 5-10 mm.

[0031] The specific type of inert gas is not limited in the present application. The surface of the glass sheet 7 is cleaned by gas blowing, or purged in advance to avoid the adsorption of particulate matter on the glass sheet 7, thereby improving the cleanliness of the glass sheet 7. The inert gas protective layer is an argon protective layer, a xenon protective layer or a helium protective layer, and can also be other gases as long as it is safe and does not react with the aluminum-lithium alloy below.

[0032] The material and size of the pipe are not limited in the present application. The ventilation pipe 4 is a copper ventilation pipe 4 or an aluminum alloy ventilation pipe 4, or a ventilation pipe 4 made of other materials.

[0033] In order to further improve the utilization efficiency of the inert gas, in one embodiment, the aluminum-lithium alloy air curtain laser failure prevention device further includes a pressure regulating valve 2 arranged in the ventilation duct 4.

[0034] By means of the pressure regulating valve 2, flow control of different inert gases is achieved in different ingots, thereby improving the utilization efficiency of the inert gas.

[0035] The type and control method of the pressure regulating valve 2 are not limited in this application.

[0036] At the same time, in order to achieve output control of the inert gas, in one embodiment, the air curtain laser failure prevention device of the aluminum-lithium alloy further includes a flow meter 3 arranged in the ventilation duct 4.

[0037] The flow meter 3 can detect the gas output of the ventilation pipe 4 in real time, and can form a mutual response with the pressure regulating valve 2, so as to improve its control and management efficiency.

[0038] To further improve the control over the pipeline, in one embodiment, the aluminum-lithium alloy air curtain laser failure prevention device further includes a valve disposed in the ventilation duct.

[0039] Through the valve, the pipeline can be quickly opened and closed, improving the convenience and efficiency of control.

[0040] This application does not limit the type of valve.

[0041] In order to further improve the detection of the operation of the entire device, in one embodiment, the aluminum-lithium alloy air curtain anti-laser failure device also includes a display connected to the pressure regulating valve 2, the flow meter 3, and the valve, which is used to display the operating data of the pressure regulating valve 2, the flow meter 3, and the valve.

[0042] By displaying the operating data of the pressure regulating valve 2, the flow meter 3 and the valve on the display, it is possible to acquire and display various operating data, thereby improving management efficiency and facilitating equipment management and maintenance.

[0043] In order to further improve the control efficiency, in one embodiment, the air curtain laser failure prevention device of the aluminum-lithium alloy also includes a wireless communication module connected to the pressure regulating valve 2, the flow meter 3, and the valve, which is used to output the operating data of the pressure regulating valve 2, the flow meter 3, and the valve or control the operating status of the pressure regulating valve 2, the flow meter 3, and the valve.

[0044] Through the wireless communication module, data can be transmitted remotely, which can realize the acquisition of equipment operation data and the control of equipment operation status, thereby improving control efficiency.

[0045] This application does not limit the type of wireless communication module, including but not limited to WiFi module, 4G module, and 5G module.

[0046] In one embodiment, a small hole is drilled on the lower side of the laser irradiated glass, connected to a ventilation pipe, and the pipe outlet is flattened to 1 mm wide in the horizontal direction, and argon gas is introduced to continuously purge the lower part of the glass, so that an argon gas protective air curtain is formed under the glass, which can effectively prevent dust from adhering to the glass, keep the glass clean, and prevent laser failure.

[0047] A filter 1, a pressure regulating valve 2 and a flow meter 3 are sequentially arranged in the ventilation duct leading to the bottom of the glass sheet 7. A flow channel cover 9 is arranged below the glass lower cover plate 8. Aluminum liquid 10 is placed in the lining 11 of the flow channel.

[0048] In the technical solution of the present application, a pipeline is added to purge the area below the glass where the laser is irradiated to prevent dust from accumulating on the glass; the purge gas is an inert gas, such as argon, to maintain an inert atmosphere and prevent oxidation; it is applicable to all production processes for molten metal smelting and casting that require laser level measurement.

[0049] The device modification in this application is simple and low-cost. It does not need to replace other types of distance measuring instruments, does not need to increase the cost of equipment upgrade, is not restricted by on-site working conditions, and retains the advantages of laser distance measurement. It can ensure that the laser is not affected by dust and keep the data stable.

[0050] It should be noted that the present application can also directly replace the existing glass sheet 7 with a glass made of a special process material, which is not affected by smoke and dust, and can keep the glass clean for a long time. However, its use cost will be very high, and in long-term use, due to the serious collision damage to particles, the use cost and maintenance cost are very high.

[0051] In summary, the air curtain laser failure prevention device for aluminum-lithium alloy provided in the embodiment of the present invention, by introducing inert gas through the ventilation duct on the side of the glass lower cover plate below the laser irradiated glass sheet, continuously purges the bottom of the glass sheet, so that an argon protective air curtain is formed under the glass sheet, which can effectively prevent dust and the like from adhering to the glass sheet, keep the glass sheet clean, ensure that the laser is not affected by dust, prevent laser failure, and improve the accuracy of liquid level detection. At the same time, the introduction of inert gas can reduce or even avoid the oxidation of the aluminum-lithium alloy in the flow channel, thereby improving the efficiency of ingot casting.

[0052] The above is a detailed introduction to the air curtain laser failure prevention device for aluminum-lithium alloy provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An air curtain laser failure prevention device of aluminum-lithium alloy, characterized in that: The invention comprises a glass sheet located in front of a laser rangefinder, a glass upper cover plate arranged on the side of the glass sheet close to the laser rangefinder, a glass lower cover plate arranged on the side of the glass sheet away from the laser rangefinder, and a ventilation duct arranged on the side of the glass lower cover plate, wherein the ventilation duct is used to output an inert gas to purge the side of the glass sheet away from the laser rangefinder and form an inert gas protective layer, wherein the inert gas protective layer is an argon protective layer, a xenon protective layer or a helium protective layer.

2. The air curtain laser failure prevention device of aluminum-lithium alloy as claimed in claim 1, characterized in that: The longitudinal section of the connection between the ventilation duct and the lower glass cover plate is rectangular.

3. The air curtain laser failure prevention device of aluminum-lithium alloy as claimed in claim 2, characterized in that: The width of the rectangle is 5-10 mm.

4. The air curtain laser failure prevention device of aluminum-lithium alloy according to any one of claims 1 to 3, characterized in that: The ventilation pipe is a copper ventilation pipe or an aluminum alloy ventilation pipe.

5. The air curtain laser failure prevention device of aluminum-lithium alloy as claimed in claim 4, characterized in that: It also includes a pressure regulating valve arranged in the ventilation pipeline.

6. The air curtain laser failure prevention device of aluminum-lithium alloy as claimed in claim 5, characterized in that: Also included is a flow meter arranged in the ventilation pipeline.

7. The air curtain laser failure prevention device of aluminum-lithium alloy as claimed in claim 6, characterized in that: Also included is a valve arranged on the ventilation duct.

8. The air curtain laser failure prevention device of aluminum-lithium alloy as claimed in claim 7, characterized in that: It also includes a display connected to the pressure regulating valve, the flow meter and the valve, and is used to display the operating data of the pressure regulating valve, the flow meter and the valve.

9. The air curtain laser failure prevention device of aluminum-lithium alloy as claimed in claim 8, characterized in that: It also includes a wireless communication module connected to the pressure regulating valve, the flow meter, and the valve, which is used to output the operating data of the pressure regulating valve, the flow meter, and the valve or control the operating status of the pressure regulating valve, the flow meter, and the valve.

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