Signal acquisition device for audio slagging system
By designing protective devices and cooling water tanks in the audio slagging system, the problem of signal distortion of the signal acquisition device in high temperature and noisy environments is solved, the signal accuracy and long life of the equipment are achieved, and the accuracy of foam slag thickness judgment and the quality of molten steel are improved.
Patent Information
- Application Number
- CN202422845634.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The signal acquisition of the audio slagging system in the converter environment is easily affected by high temperature and noise, resulting in signal distortion, affecting the accuracy of foam slag thickness judgment, and the equipment cooling effect is poor, which shortens the equipment life.
A signal acquisition device was designed, which includes a sound collection tube, a protective device, a cooling water tank, a water inlet regulating valve, a return water regulating valve, a relief valve, an industrial noise signal amplifier and an audio slag analyzer. Through the combination of the protective device and the cooling water tank, high temperature and noise interference are reduced, the cooling effect is optimized, and the signal accuracy is ensured.
It effectively reduces high temperature and noise interference, improves the accuracy of signal acquisition, extends equipment life, improves the accuracy of foam slag thickness judgment, and ensures molten steel quality and economic benefits.
Smart Images
Figure CN223409665U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a signal acquisition device for an audio slagging system, belonging to the technical field of inspection equipment. Background Art
[0002] During the converter blowing process, the slag, affected by the blowing gas, swells to form foamy slag. The degree of foaming in the slag varies continuously. When the foamy slag reaches the furnace mouth, it is prone to splashing, causing molten steel loss. When the foamy slag is too foamy, it can cause slag dry-out, impacting smelting efficiency. During blowing, the supersonic oxygen stream and solid particles (unmelted slag and high-melting-point silicates) generate a strong noise. This noise is most intense when there is no liquid slag covering it (e.g., during blowing and during severe dry-out). Once foamy slag forms, the foamy slag above the oxygen lance nozzle absorbs the noise emitted by the oxygen stream. The thicker the slag layer, the greater the height of the sound-absorbing foamy slag, and the lower the noise intensity emitted from the furnace.
[0003] The audio slagging system indirectly measures the thickness of the foamy slag within the converter. Due to the harsh environment in the converter area, the signal acquisition system is susceptible to interference from strong on-site noise, resulting in distorted signals and inaccurate reflection of the foamy slag thickness, hindering operator judgment. Furthermore, high on-site temperatures reduce the cooling effect of the cooling water tank on the sound collection tube. This high temperature also causes severe vaporization of the liquid within the water tank, shortening the equipment's service life. Summary of the Invention
[0004] The purpose of the utility model is to provide a signal acquisition device for an audio slagging system. By setting a protective device, the influence of high ambient temperature on the coolant temperature in the cooling water tank is effectively reduced, the cooling effect is optimized, and the interference of external noise in the converter workshop on the noise in the furnace can be effectively reduced. The signal collected by the audio slagging system is highly accurate, and the thickness of the foam slag in the converter is truly reflected, thereby improving the quality of molten steel, ensuring economic benefits, and solving the above-mentioned problems existing in the background technology.
[0005] The technical solution of the utility model is: a signal acquisition device for an audio slagging system, comprising a sound collecting tube, a protective device, a cooling water tank, a water inlet regulating valve, a return water regulating valve, a bleed valve, an industrial noise signal amplifier and an audio slagging instrument, wherein the sound collecting tube is connected to the cooling water tank, and the sound collecting tube is embedded and installed inside the middle section of the converter cooling flue; the cooling water tank is fixed to the outer wall of the middle section of the cooling flue, and the protective device is installed outside the cooling water tank; the water inlet regulating valve, the return water regulating valve and the bleed valve are installed on the cooling water tank; the sound collecting tube, the industrial noise signal amplifier and the audio slagging instrument are connected in sequence.
[0006] A high liquid level switch and a low liquid level switch are installed in the cooling water tank, and the high liquid level switch and the low liquid level switch are connected to the input end of the PLC through a control cable, and the corresponding output end of the PLC is connected to the water inlet regulating valve and the return water regulating valve; the high liquid level switch and the low liquid level switch are respectively set at the liquid level of two-thirds and one-third of the volume of the cooling water tank; when the cooling water level in the cooling water tank is between one-third and two-thirds of its volume, the opening of the water inlet regulating valve and the return water regulating valve are both 75%; when the cooling water level in the cooling water tank is higher than two-thirds of its volume, the opening of the water inlet regulating valve is 50%, and the opening of the return water regulating valve is 100%; when the cooling water level in the cooling water tank is lower than one-third of its volume, the opening of the water inlet regulating valve is 100%, and the opening of the return water regulating valve is 50%.
[0007] A pressure gauge is installed in the cooling water tank. The pressure gauge, PLC and relief valve are connected in sequence. When the pressure gauge reading is higher than 1.2 atm, the relief valve is in an open state, otherwise it is in a closed state.
[0008] It also includes a mounting base and a base welding plate. The mounting base is welded to the base welding plate. The base welding plate is fixed to the outer wall of the middle section of the cooling flue. The cooling water tank is fixed to the mounting base by fixing bolts.
[0009] The protection device comprises an outer layer of a protection cover and an inner layer of a protection cover, both of which are made of heat-insulating materials, and a vacuum structure is formed between the outer layer of the protection cover and the inner layer of the protection cover.
[0010] The beneficial effects of the utility model are: by setting a protective device, the influence of high ambient temperature on the coolant temperature in the cooling water tank is effectively reduced, the cooling effect is optimized, and the interference of external noise in the converter workshop on the noise in the furnace can be effectively reduced, so that the signal collected by the audio slagging system is highly accurate, and the thickness of the foam slag in the converter is truly reflected, thereby improving the quality of molten steel and ensuring economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0012] Figure 2 This is a schematic structural diagram of the cooling water tank of the utility model;
[0013] Figure 3 This is the flow chart of the cooling water tank level control of the utility model;
[0014] Figure 4 This is a flow chart of the cooling water tank pressure control of the utility model;
[0015] In the figure: sound sampling tube 1, cooling water tank 2, mounting base 3, base welding plate 4, fixing bolts 5, outer layer of protective cover 6, inner layer of protective cover 7, water inlet regulating valve 8, return water regulating valve 9, relief valve 10, industrial noise signal amplifier 11, audio slag analyzer 12, high liquid level switch 13, low liquid level switch 14, pressure gauge 15. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solutions and advantages of the implementation cases of the present utility model clearer, the technical solutions in the implementation cases of the present utility model will be clearly and completely described below in combination with the drawings in the implementation cases. Obviously, the implementation cases described are only a small part of the implementation cases of the present utility model, rather than all the implementation cases. Based on the implementation cases in the present utility model, all other implementation cases obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present utility model.
[0017] A signal acquisition device for an audio slagging system comprises a sound collecting tube 1, a protective device, a cooling water tank 2, a water inlet regulating valve 8, a return water regulating valve 9, a relief valve 10, an industrial noise signal amplifier 11 and an audio slagging instrument 12. The sound collecting tube 1 is connected to the cooling water tank 2 and is embedded in the middle section of the converter cooling flue; the cooling water tank 2 is fixed to the outer wall of the middle section of the cooling flue, and the protective device is installed outside the cooling water tank 2; the water inlet regulating valve 8, the return water regulating valve 9 and the relief valve 10 are installed on the cooling water tank 2; the sound collecting tube 1, the industrial noise signal amplifier 11 and the audio slagging instrument 12 are connected in sequence.
[0018] A high liquid level switch 13 and a low liquid level switch 14 are installed in the cooling water tank 2. The high liquid level switch 13 and the low liquid level switch 14 are connected to the input end of the PLC through a control cable, and the corresponding output end of the PLC is connected to the water inlet regulating valve 8 and the return water regulating valve 9; the high liquid level switch and the low liquid level switch are respectively arranged at the liquid level of two-thirds and the liquid level of one-third of the volume of the cooling water tank 2; when the cooling water level in the cooling water tank 2 is between one-third and two-thirds of its volume, the opening degrees of the water inlet regulating valve 8 and the return water regulating valve 9 are both 75%; when the cooling water level in the cooling water tank 2 is higher than two-thirds of its volume, the opening degree of the water inlet regulating valve 8 is 50%, and the opening degree of the return water regulating valve 9 is 100%; when the cooling water level in the cooling water tank 2 is lower than one-third of its volume, the opening degree of the water inlet regulating valve 8 is 100%, and the opening degree of the return water regulating valve 9 is 50%.
[0019] A pressure gauge 15 is installed in the cooling water tank 2. The pressure gauge 15, PLC and relief valve 10 are connected in sequence. When the reading of the pressure gauge 15 is higher than 1.2 atm, the relief valve 10 is in an open state, otherwise it is in a closed state.
[0020] It also includes a mounting base 3 and a base welding plate 4. The mounting base 3 is welded to the base welding plate 4. The base welding plate 4 is fixed to the outer wall of the middle section of the cooling flue. The cooling water tank 2 is fixed to the mounting base 3 by fixing bolts 5.
[0021] The protection device comprises a protection cover outer layer 6 and a protection cover inner layer 7 , both of which are made of heat-insulating materials, and a vacuum structure is formed between the protection cover outer layer 6 and the protection cover inner layer 7 .
[0022] In practical applications, such as Figure 1 During installation, the sound collection tube 1 is embedded within the middle section of the converter's cooling flue to collect noise during blowing. The sound collection tube 1 is connected to the cooling water tank 2, which is used to cool the sound collection tube 1. The mounting base 3 is welded to a base welding plate 4, which is fixed to the outer wall of the middle section of the cooling flue. The cooling water tank 2 is secured to the mounting base 3 via fixing bolts 5. The protective device comprises two layers: an outer protective cover layer 6 and an inner protective cover layer 7. Both layers are made of thermally insulating materials for protection. A vacuum is created between the two layers to reduce signal interference caused by external noise and improve signal accuracy. The sound collection tube 1 transmits the signal to an industrial noise signal amplifier 11, which directs and filters the noise signal. The industrial noise signal amplifier 11 then transmits the processed noise signal to an audio slag analyzer 12, which obtains the foam slag thickness signal within the converter and generates a curve for display on a host computer and provision to the operator.
[0023] like Figure 2 A high level switch 13 and a low level switch 14 are installed in the cooling water tank 2. The high level switch 13 and the low level switch 14 are connected to the PLC via a control cable. A pressure gauge 15 is installed in the cooling water tank 2. The pressure gauge 15 is connected to the PLC via a control cable.
[0024] like Figure 3 When the cooling water level in the cooling water tank 2 is between one-third and two-thirds of its volume, the openings of the water inlet regulating valve 8 and the return water regulating valve 9 are both 75%; when the cooling water level in the cooling water tank 2 is higher than two-thirds of its volume, the high liquid level switch 13 is triggered, and the opening of the water inlet regulating valve 8 is adjusted to 50%, while the opening of the return water regulating valve 9 is adjusted to 100%; when the cooling water level in the cooling water tank 2 is lower than one-third of its volume, the low liquid level switch 14 is triggered, and the opening of the water inlet regulating valve 8 is adjusted to 100%, while the opening of the return water regulating valve 9 is adjusted to 50%.
[0025] like Figure 4 The relief valve 10 is used to adjust the pressure change caused by liquid gasification in the cooling water tank 2. When the pressure gauge reading is higher than 1.2 atm, the relief valve 10 is opened, otherwise it is closed. Example
[0026] The thermal insulation material of the outer and inner layers 6 and 7 of the protective cover effectively reduces the impact of high ambient temperatures on the coolant temperature within the cooling water tank 2, optimizing the cooling effect and extending the service life of the sound sampling tube 1 and the cooling water tank 2. A vacuum treatment is applied between the outer and inner layers 6 and 7 of the protective cover, reducing interference from ambient noise on the signal from the sound sampling tube 1. This ensures a more realistic signal transmitted from the industrial noise signal amplifier 11 to the audio slag analyzer 12, more accurately calculating the foam slag thickness, and reducing operational difficulty. This significantly improves operator skill, significantly reduces the frequency of backflow and overflow, and ensures product quality. The PLC controls the opening of the inlet and return regulating valves 8 and 9 based on the high and low liquid level switches 13 and 14, and controls the opening and closing of the pressure relief valve 10 based on the reading of the pressure gauge 15, ensuring optimal liquid level, temperature, and pressure within the cooling water tank 2. This improves cooling efficiency, extends equipment life, and saves costs.
Claims
1. A signal acquisition device for an audio slag reduction system, characterized by: The invention comprises a sound collecting tube (1), a protective device, a cooling water tank (2), a water inlet regulating valve (8), a return water regulating valve (9), a relief valve (10), an industrial noise signal amplifier (11) and an audio slag disintegrating instrument (12), wherein the sound collecting tube (1) is connected to the cooling water tank (2), and the sound collecting tube (1) is embedded and installed inside the middle section of the converter cooling flue; the cooling water tank (2) is fixed to the outer wall of the middle section of the cooling flue, and the protective device is installed outside the cooling water tank (2); the water inlet regulating valve (8), the return water regulating valve (9) and the relief valve (10) are installed on the cooling water tank (2); the sound collecting tube (1), the industrial noise signal amplifier (11) and the audio slag disintegrating instrument (12) are sequentially signal-connected.
2. The signal acquisition device for an audio slag reduction system according to claim 1, characterized in that: A high liquid level switch (13) and a low liquid level switch (14) are installed in the cooling water tank (2). The high liquid level switch (13) and the low liquid level switch (14) are connected to the input end of the PLC through a control cable, and the corresponding output end of the PLC is connected to the water inlet regulating valve (8) and the return water regulating valve (9); the high liquid level switch (13) and the low liquid level switch (14) are respectively set at the liquid level of two-thirds and the liquid level of one-third of the volume of the cooling water tank (2); the cooling water level in the cooling water tank (2) When the level of the cooling water in the cooling water tank (2) is between one-third and two-thirds of its volume, the opening degree of the water inlet regulating valve (8) and the return water regulating valve (9) are both 75%; when the level of the cooling water in the cooling water tank (2) is higher than two-thirds of its volume, the opening degree of the water inlet regulating valve (8) is 50%, and the opening degree of the return water regulating valve (9) is 100%; when the level of the cooling water in the cooling water tank (2) is lower than one-third of its volume, the opening degree of the water inlet regulating valve (8) is 100%, and the opening degree of the return water regulating valve (9) is 50%.
3. The signal acquisition device for an audio slag reduction system according to claim 1, characterized in that: A pressure gauge (15) is installed in the cooling water tank (2). The pressure gauge (15), PLC and relief valve (10) are sequentially signal-connected. When the pressure gauge (15) reading is higher than 1.2 atm, the relief valve (10) is in an open state, otherwise it is in a closed state.
4. The signal acquisition device for an audio slag reduction system according to claim 1, characterized in that: It also includes a mounting base (3) and a base welding plate (4), wherein the mounting base (3) is welded to the base welding plate (4), the base welding plate (4) is fixed to the outer wall of the middle section of the cooling flue, and the cooling water tank (2) is fixed to the mounting base (3) by fixing bolts (5).
5. The signal acquisition device for an audio slag reduction system according to claim 1, characterized in that: The protective device comprises a protective cover outer layer (6) and a protective cover inner layer (7), both of which are made of heat-insulating materials, and a vacuum structure is formed between the protective cover outer layer (6) and the protective cover inner layer (7).