Device and method for measuring thickness of covering slag layer

Abstract

The invention provides a device and method for measuring the thickness of a casting powder layer, and relates to the technical field of casting powder layer thickness measurement, and the device comprises a guide pipe, one end of the guide pipe is connected with a wire feeder, the other end of the guide pipe is provided with an opening, the pipe wall close to the other end of the guide pipe is provided with a detection window, and the other end of the guide pipe is used for being arranged above a crystallizer; one end of the metal wire is connected with the wire feeder, and the other end penetrates through the guide pipe and extends out of the opening; the mounting frame is arranged on one side of the detection window, a distance sensor and a displacement sensor are mounted on the mounting frame, the distance sensor is used for detecting the distance between the distance sensor and the upper surface of a casting powder layer in the crystallizer, and the displacement sensor is used for penetrating through the detection window to detect the displacement amount of the metal wire; the control unit is used for controlling the wire feeder and calculating the difference value of the detection results of the displacement sensor and the distance sensor; the problems that in the prior art, single-point sampling and measurement are conducted on the thickness of the casting powder layer manually, and the measurement density and the measurement accuracy are difficult to guarantee are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of measuring the thickness of protective slag layer, and more specifically, relates to a device and method for measuring the thickness of protective slag layer. Background Art

[0002] In the continuous casting production process of the steel industry, the use of protective slag technology with specific chemical composition is a key process measure to optimize the quality of steel products and improve production efficiency. The fine adjustment of the protective slag, including its composition, temperature, pH, and real-time thickness and temperature state, has a profound impact on the stability of the continuous casting process and the quality of the final product. Therefore, the accurate and continuous measurement of the thickness of the protective slag layer has become an indispensable technical requirement in the continuous casting process.

[0003] However, the currently widely used method for measuring the thickness of the protective slag layer mainly relies on manual single-point sampling and measurement. This method is not only inefficient, but also limited by human factors, which makes it difficult to ensure the accuracy of the measurement density and measurement results, making it difficult to achieve uniform control of the thickness of the protective slag layer in subsequent processes, which may cause fluctuations and declines in the quality of continuous casting products. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for measuring the thickness of the protective slag layer in view of the shortcomings of the prior art, so as to solve the problem that the single-point sampling and measurement of the thickness of the protective slag layer by manual means in the prior art is difficult to ensure the measurement density and measurement accuracy.

[0005] In order to achieve the above object, the present invention provides a device and method for measuring the thickness of a protective slag layer, comprising:

[0006] A guide tube, one end of which is connected to a wire feeder, the other end of which is provided with an opening, and a detection window is provided on a tube wall near the other end of the guide tube, and the other end of the guide tube is used to be arranged above a crystallizer;

[0007] A metal wire, one end of which is connected to the wire feeder, and the other end of which passes through the guide tube and extends out from the opening;

[0008] a mounting frame, the mounting frame being arranged at one side of the detection window, the mounting frame being provided with a distance sensor and a displacement sensor, the distance sensor being used to detect the distance between the distance sensor and the upper surface of the protective slag layer in the crystallizer, and the displacement sensor being used to detect the displacement of the metal wire through the detection window;

[0009] A control unit is connected to the wire feeder, the distance sensor and the displacement sensor, and is used to control the operation of the wire feeder and to calculate the difference between the detection result of the displacement sensor and the detection result of the distance sensor.

[0010] Optionally, the guide tube is in an inverted U shape.

[0011] Optionally, a telescopic structure is provided near one end of the guide tube, and the telescopic structure can adjust the length of the guide rod.

[0012] Optionally, the telescopic structure includes a telescopic sleeve, the guide tube includes two sections, one end of the two sections of the guide tube close to each other is movably inserted into the telescopic sleeve, and the telescopic sleeve is provided with a first fixing screw near the two ends.

[0013] Optionally, the wire feeder is arranged on a base, and a moving wheel is arranged on the lower side of the base.

[0014] Optionally, the mounting frame is L-shaped, one end of the mounting frame is connected to the guide tube, the other end of the mounting frame is aligned with the detection window, and the distance sensor and the displacement sensor are mounted on the other end of the mounting frame.

[0015] Optionally, a mounting sleeve is provided at one end of the mounting frame, the mounting sleeve is slidably mounted on the outer side of the guide tube, and a second fixing screw is provided on the mounting sleeve.

[0016] Optionally, the metal wire is a copper wire.

[0017] The present invention also provides a method for measuring the thickness of a protective slag layer, using the above-mentioned device for measuring the thickness of a protective slag layer, comprising:

[0018] Step 1, move the other end of the guide tube to the top of the crystallizer and make the distance sensor be above the protective slag layer in the crystallizer;

[0019] Step 2: Feed the wire using a wire feeder so that the other end of the wire moves toward the inside of the crystallizer and is inserted into the molten steel;

[0020] Step 3: Use a distance sensor to detect the distance between the upper surface of the protective slag layer in the crystallizer and obtain a distance value;

[0021] Step 4, using a wire feeder to collect the wire so that the metal wire is pulled out of the molten steel, and at the same time using a displacement sensor to detect the displacement of the metal wire from the moment the wire is collected to the moment the other end of the metal wire is removed from the displacement sensor;

[0022] Step 5: Calculate the difference between the displacement and the distance value, and use the difference as the thickness of the protective slag layer.

[0023] Optionally, steps 2 to 5 are performed once every set time period.

[0024] The present invention provides a device and method for measuring the thickness of a protective slag layer, and its beneficial effects are: the device for measuring the thickness of a protective slag layer comprises a guide tube, a wire feeder and a metal wire, the metal wire movably passes through the guide tube, the wire feeder can feed and retract the metal wire, so that the metal wire moves along the guide tube, extends out and is retracted at the other end of the guide tube, the other end of the guide tube can be arranged above the crystallizer, so that the metal wire extending from the opening can move downward through the protective slag layer and insert into molten steel, then the metal wire inserted into the molten steel will melt while the metal wire out of the protective slag layer will not melt, then the distance between it and the upper surface of the protective slag layer is detected by a distance sensor to obtain a distance value, the metal wire is recovered by the wire feeder so that the end of the metal wire that remains in the protective slag layer and does not melt moves upward, in this process, the displacement of the metal wire from the beginning of movement to the end of the metal wire just passing through the displacement sensor is detected by a displacement sensor, the control unit can calculate the difference between the displacement and the distance value, and the thickness of the current protective slag layer can be accurately calculated, the measurement result has high accuracy, and it is convenient to perform continuous multiple measurements, and the degree of automation is high.

[0025] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0027] Figure 1 A schematic diagram of a device for measuring the thickness of a protective slag layer according to an embodiment of the present invention is shown.

[0028] Figure 2 A flow chart of a method for measuring the thickness of a protective slag layer according to an embodiment of the present invention is shown.

[0029] Description of reference numerals:

[0030] 1. Wire feeder; 2. First set screw; 3. Guide tube; 4. Copper wire; 5. Displacement sensor; 6. Detection window; 7. Immersed nozzle; 8. Upper surface of protective slag layer; 9. Crystallizer; 10. Molten steel level; 11. Mounting frame; 12. Distance sensor; 13. Telescopic sleeve; 14. Moving wheel; 15. Mounting sleeve; 16. Second set screw. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0032] like Figure 1 As shown, the present invention provides a device and method for measuring the thickness of a protective slag layer, comprising:

[0033] A guide tube 3, one end of which is connected to the wire feeder 1, the other end of which is provided with an opening, and a detection window 6 is provided on the tube wall near the other end of the guide tube 3, and the other end of the guide tube 3 is used to be arranged above the crystallizer 9;

[0034] A metal wire, one end of which is connected to the wire feeder 1, and the other end of which passes through the guide tube 3 and extends out from the opening;

[0035] A mounting frame 11, which is arranged at one side of the detection window 6, and on which a distance sensor 12 and a displacement sensor 5 are mounted. The distance sensor 12 is used to detect the distance between the distance sensor 12 and the upper surface of the protective slag layer in the crystallizer 9, and the displacement sensor 5 is used to detect the displacement of the metal wire through the detection window 6;

[0036] The control unit is connected to the wire feeder 1 , the distance sensor 12 and the displacement sensor 5 , and is used to control the operation of the wire feeder 1 and to calculate the difference between the detection result of the displacement sensor 5 and the detection result of the distance sensor 12 .

[0037] Specifically, in order to solve the problem in the prior art that manual single-point sampling and measurement of the protective slag layer thickness are difficult to ensure in terms of measurement density and measurement accuracy; the device for measuring the protective slag layer thickness provided by the present invention comprises a guide tube 3, a wire feeder 1 and a metal wire, the metal wire moves through the guide tube 3, the wire feeder 1 can feed and retract the metal wire, so that the metal wire moves along the guide tube 3, extends out and is retracted at the other end of the guide tube 3, the other end of the guide tube 3 can be arranged above the crystallizer 9, so that the metal wire extending from the opening can move downward, pass through the protective slag layer and be inserted into the molten steel, then the metal wire inserted into the molten steel will melt and come out The metal wire in the protective slag layer does not melt, so the distance sensor 12 is used to detect the distance between it and the upper surface 8 of the protective slag layer to obtain the distance value, and the wire feeder 1 is used to recycle the metal wire so that the end of the metal wire that remains in the protective slag layer and does not melt moves upward. In this process, the displacement sensor 5 is used to detect the displacement of the metal wire from the beginning of movement until the end of the metal wire just passes through the displacement sensor 5. The control unit can calculate the difference between the displacement and the distance value, and can accurately calculate the thickness of the current protective slag layer. The measurement result is highly accurate, and it is convenient to carry out continuous and multiple measurements, with a high degree of automation.

[0038] In this embodiment, the displacement sensor 5 adopts a contact displacement sensor 5, such as a potentiometer displacement sensor 5, and the displacement sensor 5 is fixed on the mounting frame 11, and its test end is in contact with the metal wire; in other embodiments, a non-contact displacement sensor 5 that can realize the corresponding displacement test function can also be used.

[0039] Optionally, the guide tube 3 is in an inverted U shape.

[0040] Specifically, the guide tube 3 is in an inverted U shape, so that the wire feeder 1 can be placed on the ground. The metal wire is guided to a suitable height through the guide tube 3 and then vertically extended downward to above the crystallizer 9, making it easy for the metal wire to be vertically inserted into the molten steel in the crystallizer 9.

[0041] Optionally, a telescopic structure is provided near one end of the guide tube 3, and the telescopic structure can adjust the length of the guide rod.

[0042] Specifically, the provision of the telescopic structure facilitates the adjustment of the vertical height of the guide tube 3, thereby improving the applicability of the device for measuring the thickness of the protective slag layer.

[0043] Optionally, the telescopic structure includes a telescopic sleeve 13, the guide tube 3 includes two sections, the ends of the two sections of the guide tube 3 close to each other are movably arranged in the telescopic sleeve 13, and the first fixing screws 2 are arranged near the two ends of the telescopic sleeve 13.

[0044] Specifically, the guide tube 3 is divided into two sections, which are movably connected by a telescopic sleeve 13. The vertical height of the guide tube 3 can be adjusted by plugging and pulling. After adjustment, it can be fastened by the first fixing screw 2. At the same time, the guide tube 3 divided into two sections is also easy to disassemble, move and assemble.

[0045] Optionally, the wire feeder 1 is disposed on a base, and a moving wheel 14 is disposed on the lower side of the base.

[0046] Specifically, the provision of a base with moving wheels 14 makes the device for measuring the thickness of the protective slag layer easy to move, thereby improving its convenience in use.

[0047] Optionally, the mounting frame 11 is L-shaped, one end of the mounting frame 11 is connected to the guide tube 3 , the other end of the mounting frame 11 is aligned with the detection window 6 , and the distance sensor 12 and the displacement sensor 5 are installed at the other end of the mounting frame 11 .

[0048] Specifically, the mounting frame 11 can be a rod-shaped component, the upper end of which is connected to the guide tube 3 and the lower end is arranged at a position corresponding to the detection window 6, which is convenient for the installation and detection of the distance sensor 12 and the displacement sensor 5.

[0049] Optionally, a mounting sleeve 15 is provided at one end of the mounting frame 11 , and the mounting sleeve 15 is slidably sleeved on the outer side of the guide tube 3 , and a second set screw 16 is provided on the mounting sleeve 15 .

[0050] Specifically, the mounting bracket 11 can be installed on the horizontal section of the guide tube 3 through the mounting sleeve 15 with the second fixing screw 16 , so that the mounting bracket 11 can be moved to adjust the positions of the distance sensor 12 and the displacement sensor 5 .

[0051] Optionally, the metal wire is a copper wire 4 .

[0052] Specifically, the copper wire 4 can be used as the metal wire inserted into the molten steel, which can ensure that it melts in the molten steel and does not melt in the protective slag layer, and the melting of a very small amount of copper will not have a substantial impact on the composition and quality of the molten steel.

[0053] like Figure 2 As shown, the present invention also provides a method for measuring the thickness of a protective slag layer, using the above-mentioned device for measuring the thickness of a protective slag layer, comprising:

[0054] Step 1, move the other end of the guide tube 3 to the top of the crystallizer 9 and make the distance sensor 12 be above the protective slag layer in the crystallizer 9;

[0055] Step 2: Feed the wire using the wire feeder 1 so that the other end of the metal wire moves toward the inside of the crystallizer 9 and is inserted into the molten steel;

[0056] Step 3: Use the distance sensor 12 to detect the distance between the distance sensor 12 and the upper surface of the protective slag layer in the crystallizer 9 to obtain a distance value;

[0057] Step 4, using the wire feeder 1 to collect the wire so that the metal wire is pulled out of the molten steel, and at the same time using the displacement sensor 5 to detect the displacement of the metal wire from the moment the wire is collected to the moment the other end of the metal wire is removed from the displacement sensor 5;

[0058] Step 5: Calculate the difference between the displacement and the distance value, and use the difference as the thickness of the protective slag layer.

[0059] Optionally, steps 2 to 5 are performed once every set time period.

[0060] Specifically, the above-mentioned device for measuring the thickness of the protective slag layer is used to accurately measure the thickness of the protective slag layer in the crystallizer 9 for multiple times using the above-mentioned method for measuring the thickness of the protective slag layer, which is beneficial to regulating the thickness of the protective slag layer, meeting process requirements, and thus ensuring steelmaking quality.

[0061] In summary, when the method for measuring the thickness of the protective slag layer provided by the present invention is implemented, the above-mentioned device for measuring the thickness of the protective slag layer is used, and the measurement of the thickness of the protective slag layer within a period of time is taken as an example: before work, first loosen the first fixing screw 2, adjust the vertical height of the guide tube 3 to an appropriate level and then tighten it to ensure that the other end of the guide tube 3 avoids the position of the immersion water inlet 7 in the crystallizer 9, and the positions of the displacement sensor 5 and the distance sensor 12 are adjusted by the mounting sleeve 15 with the second fixing screw 16; the set duration of the measurement interval and the wire feeding amount each time are set by the control unit, for example, measurement is performed once every 3 minutes, each time the wire feeder 1 works for 4 seconds, and the wire feeding length is approximately 60 cm, ensuring that the copper wire 4 can be inserted below the molten steel liquid level 10 each time the wire is fed. During operation, the wire feeder 1 stops running after feeding the copper wire 4 to the set length, and then stops for 1 minute before collecting the wire. While collecting the copper wire 4, the displacement sensor 5 detects the wire collection length, i.e., the displacement of the copper wire 4. When the lower end of the copper wire 4 moves out of the displacement sensor 5, the detection stops instantly, and the wire feeder 1 stops collecting the wire; and the distance sensor 12 detects the distance between it and the upper surface 8 of the protective slag layer to obtain the distance value; the displacement and the distance value are calculated in the control unit, and the difference between the two is calculated to obtain the thickness of the protective slag layer measured this time, and a measurement is completed. After that, the thickness of the protective slag layer is measured again after each set time, thereby realizing continuous and multiple automatic measurements of the thickness of the protective slag layer in the crystallizer 9, which helps to ensure that the thickness of the protective slag layer is maintained within the process parameter range and ensures the quality of steelmaking.

[0062] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A device for measuring the thickness of a protective slag layer, characterized in that: include: A guide tube, one end of which is connected to a wire feeder, the other end of which is provided with an opening, and a detection window is provided on a tube wall near the other end of the guide tube, and the other end of the guide tube is used to be arranged above a crystallizer; A metal wire, one end of which is connected to the wire feeder, and the other end of which passes through the guide tube and extends out from the opening; a mounting frame, the mounting frame being arranged at one side of the detection window, the mounting frame being provided with a distance sensor and a displacement sensor, the distance sensor being used to detect the distance between the distance sensor and the upper surface of the protective slag layer in the crystallizer, and the displacement sensor being used to detect the displacement of the metal wire through the detection window; A control unit is connected to the wire feeder, the distance sensor and the displacement sensor, and is used to control the operation of the wire feeder and to calculate the difference between the detection result of the displacement sensor and the detection result of the distance sensor.

2. The device for measuring the thickness of protective slag layer according to claim 1, characterized in that: The guide tube is in an inverted U shape.

3. The device for measuring the thickness of protective slag layer according to claim 1, characterized in that: A telescopic structure is provided near one end of the guide tube, and the telescopic structure can adjust the length of the guide rod.

4. The device for measuring the thickness of protective slag layer according to claim 3, characterized in that: The telescopic structure comprises a telescopic sleeve, the guide tube comprises two sections, one end of the two sections of the guide tube close to each other is movably inserted into the telescopic sleeve, and the positions of the telescopic sleeve close to the two ends are provided with first fixing screws.

5. The device for measuring the thickness of protective slag layer according to claim 1, characterized in that: The wire feeder is arranged on a base, and a moving wheel is arranged on the lower side of the base.

6. The device for measuring the thickness of protective slag layer according to claim 1, characterized in that: The mounting frame is L-shaped, one end of the mounting frame is connected to the guide tube, the other end of the mounting frame is aligned with the detection window, and the distance sensor and the displacement sensor are mounted on the other end of the mounting frame.

7. The device for measuring the thickness of protective slag layer according to claim 6, characterized in that: A mounting sleeve is arranged at one end of the mounting frame, the mounting sleeve is slidably sleeved on the outer side of the guide tube, and a second fixing screw is arranged on the mounting sleeve.

8. The device for measuring the thickness of protective slag layer according to claim 1, characterized in that: The metal wire is a copper wire.

9. A method for measuring the thickness of a protective slag layer, using the device for measuring the thickness of a protective slag layer according to any one of claims 1 to 8, characterized in that: include: Step 1, move the other end of the guide tube to the top of the crystallizer and make the distance sensor be above the protective slag layer in the crystallizer; Step 2: Feed the wire using a wire feeder so that the other end of the wire moves toward the inside of the crystallizer and is inserted into the molten steel; Step 3: Use a distance sensor to detect the distance between the upper surface of the protective slag layer in the crystallizer and obtain a distance value; Step 4, using a wire feeder to collect the wire so that the metal wire is pulled out of the molten steel, and at the same time using a displacement sensor to detect the displacement of the metal wire from the moment the wire is collected to the moment the other end of the metal wire is removed from the displacement sensor; Step 5: Calculate the difference between the displacement and the distance value, and use the difference as the thickness of the protective slag layer.

10. The method for measuring the thickness of the protective slag layer according to claim 9, characterized in that: Perform steps 2 to 5 once every set time.

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