Detection method of small square billet continuous casting crystallizer

Abstract

The invention relates to a small square billet continuous casting crystallizer detection method, and belongs to the technical field of forming. The method aims at improving the control accuracy of the continuous casting production process and the casting blank quality. According to the method, a micro sensor substrate is manufactured through the MEMS technology, heat flow and temperature detection elements are integrated, a passive wireless inductance antenna is arranged, and an external signal lead is not needed. The sensor is packaged in the screw-shaped measuring probe and can be directly screwed into a measuring threaded hole in the copper pipe wall of the crystallizer, so that the authenticity of measured data is ensured. Meanwhile, the signal receiver is packaged into a screw shape and installed on the water jacket, and signals are led out of the crystallizer through a lead and connected to a data acquisition system. The method has the advantages of high response speed and accuracy of the MEMS sensor, non-destructive installation mode and convenient signal transmission. In addition, the method is suitable for various small square billet / small round billet continuous casting machines, is easy to popularize and apply, and is beneficial to improving the stability of continuous casting production and the quality of casting billets.

Description

Technical Field

[0001] The invention belongs to the technical field of forming and relates to a method for detecting a small square billet continuous casting crystallizer. Background Art

[0002] In the process of continuous casting of billets / round billets, the heat flow and temperature of the copper tube of the crystallizer have a crucial impact on the control of continuous casting production and the quality of the billet. Accurate monitoring of the heat flow and temperature of the copper tube of the crystallizer is essential for preventing steel leakage, optimizing cooling water flow and adjusting process parameters. However, the existing continuous casting crystallizer heat flow and temperature detection technology has certain limitations.

[0003] Traditional heat flow and temperature detection methods usually rely on large sensors that are difficult to install on the small size of the crystallizer copper tube, especially in the space-constrained continuous casting machine. In addition, these sensors often need to be connected to the data acquisition system through wires, which is not only complicated but also prone to interference in actual operation.

[0004] Although some existing technologies try to use wireless sensors to overcome these limitations, these sensors still have shortcomings in size, response speed and wireless transmission of signals. Especially in high-speed continuous casting processes, the response speed of sensors and real-time transmission of data are crucial for timely adjustment of process parameters. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a small square billet continuous casting crystallizer detection method, to provide a more accurate, fast response and easy to install detection method in the field of heat flow and temperature detection of small square billet / small round billet continuous casting crystallizer.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A method for detecting a billet continuous casting crystallizer comprises the following steps:

[0008] preparing at least one sensor, the sensor integrating a heat flow detection element and a temperature detection element and configured to have a data transmission function;

[0009] Fixing the sensor at a predetermined position of the copper tube of the crystallizer;

[0010] Receive the signal transmitted by the sensor through the receiving device, and transmit the signal to the data acquisition system;

[0011] The data acquisition system processes and analyzes the detected heat flow and temperature data to monitor the heat flow and temperature changes of the crystallizer copper tube in real time.

[0012] Optionally, the micro sensor is manufactured using MEMS technology.

[0013] Optionally, the sensor is packaged as a measuring probe with a screw shape of M6×8.

[0014] Optionally, a measuring threaded hole matching with the measuring probe is provided on the outer wall of the copper tube of the crystallizer.

[0015] Optionally, a temperature-resistant sealing ring is provided between the measuring probe and the measuring threaded hole.

[0016] Optionally, a threaded through hole is provided on the water jacket wall outside the copper tube of the crystallizer at a position matching the measuring threaded hole.

[0017] Optionally, the sensor is configured to have a wireless transmission function and transmits the received signal in the form of a wireless signal.

[0018] Optionally, the receiving device receives signals in a wireless reception form, and transmits the received signals in a form of an external lead wire.

[0019] The beneficial effects of the present invention are:

[0020] 1. Accurate measurement: The heat flow and temperature sensor manufactured by the MEMS process in the present invention can measure the heat flow and temperature of the copper tube measurement point online at the same time, thereby improving the measurement accuracy.

[0021] 2. Fast response: The heat flow and temperature sensors made using MEMS technology have the characteristics of fast response, which can instantly detect the instantaneous changes in the heat flow and temperature of the copper tube of the crystallizer, and effectively predict the occurrence of crystallizer leakage.

[0022] 3. Non-destructive installation: The measuring probe is made of the same material as the copper tube and is assembled by screwing it in, which does not destroy the thermal field of the copper tube of the crystallizer and ensures the authenticity of the measurement data.

[0023] 4. Wireless transmission: The measuring probe itself has a passive transmitting antenna, no external leads are required, and the signal is directly transmitted through the sensor integrated in the

[0024] The passive antenna on the crystallizer is sent out from the back of the copper tube, which facilitates the transmission of signals without affecting the cooling of the crystallizer copper tube.

[0025] 5. Easy to install and maintain: Since the sensor is tightly integrated with the copper tube wall of the crystallizer and does not damage the cooling water flow field, the installation and maintenance of the sensor become simple and convenient.

[0026] 6. Wide applicability: The present invention is applicable to various types of billet / round billet continuous casting machines, is easy to promote and apply, and improves the

[0027] The continuous casting of small round billets has improved the production stability and the quality of the billets.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 is a schematic diagram of a sensor substrate;

[0031] Figure 2 This is a schematic diagram of the measuring probe housing;

[0032] Figure 3 is a schematic diagram of the measuring probe;

[0033] Figure 4 This is a schematic diagram of the measurement position of the crystallizer copper tube;

[0034] Figure 5 for Figure 4 KK cross-sectional view;

[0035] Figure 6 for Figure 5 A magnified view of area A;

[0036] Figure 7 This is a schematic diagram of the location of the crystallizer cooling water jacket and sensor receiver;

[0037] Figure 8 This is a schematic diagram of the sensor installation location;

[0038] Fig. 9 for Figure 8 Schematic diagram from another perspective;

[0039] Fig.10 This is a schematic diagram of signal transmission routing.

[0040] Reference numerals: 1 heat flow sensor, 2 temperature sensor, 3 substrate, 4 passive antenna, 5 measuring probe, 6 crystallizer copper tube, 7 crystallizer cooling water jacket, 8 receiver, 9 lead wire, 10 crystallizer water tank. DETAILED DESCRIPTION

[0041] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0042] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0043] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] See also Figures 1 to 10 , which is a method for detecting a small billet continuous casting crystallizer, and the specific implementation method includes the following steps:

[0045] (1) Fabrication of heat flux and temperature sensor substrates. A heat flux and temperature sensor substrate 3 is fabricated on a substrate using MEMS processes such as photolithography and sputtering, and a passive wireless inductive antenna is arranged on the substrate 3. The heat flux sensor 1 is fabricated based on the thermopile principle, and the temperature sensor 2 is fabricated based on the thermoelectric principle. After the passive antenna 4 is adopted, there is no need to make signal leads on the substrate 3. Since the MEMS process can fabricate the above sensors in a very small size, the heat flux and temperature sensors and the passive antenna can be fabricated on a relatively small substrate 3 according to the test space of the crystallizer copper tube. The size of the entire sensor does not exceed 3mm×6mm and the thickness does not exceed 1mm. In the figure, the heat flux sensor 1 and the temperature sensor 2 are arranged at the front end of the substrate 3, so that they are closer to the hot surface of the crystallizer copper tube to be tested during detection. The signal transmission part of the sensor substrate is arranged at the rear end of the substrate to facilitate signal transmission.

[0046] (2) Encapsulate the sensor in the measuring probe 5. A shallow groove that matches the shape of the sensor substrate 3 is machined in a copper screw made of the same material as the copper tube of the crystallizer, and then the sensor substrate is embedded in the shallow groove to form a copper screw measuring probe of the sensor. The thread diameter of the entire measuring probe 5 does not exceed M6, and the thread length does not exceed 8 mm according to the wall thickness requirement of the copper tube 6 of the crystallizer.

[0047] (3) Assembly of the sensor and the crystallizer copper tube 6. According to the measurement requirements, multiple rows and columns of measuring threaded holes that are compatible with the size of the measuring probe 5 are opened on the outer side of the wall of the crystallizer copper tube 6. During assembly, the measuring probe 5 is accurately screwed into the measuring threaded hole on the wall of the crystallizer copper tube 6. In order to ensure that the crystallizer cooling water does not enter the measuring hole, a sealing ring is provided between the screw-shaped measuring probe 5 and the crystallizer copper tube 6 for sealing.

[0048] (4) Assembly of the receiver 8 and the crystallizer cooling water jacket 7. The signal receiver 8 is packaged into an M6×8 screw shape with an external lead 9; corresponding to the position of the measuring threaded hole of the crystallizer copper tube 6, multiple rows and columns of threaded through holes are arranged at the corresponding position on the wall of the crystallizer cooling water jacket 7, and the signal receiver 8 is installed there. The contact surface between the screw-shaped receiver 8 and the crystallizer cooling water jacket 7 is sealed with a sealing ring to prevent water from flowing between the water gap and the water jacket.

[0049] (5) Assembly of the crystallizer copper tube 6 assembly and the crystallizer cooling water jacket 7 assembly. The crystallizer copper tube 6 assembly with the measuring probe 5 and the crystallizer cooling water jacket 7 assembly with the signal receiver 8 are two independent assemblies. During assembly, the crystallizer copper tube 6 assembly is directly inserted into the crystallizer cooling water jacket 7 assembly, and the two are positioned with the positioning stopper; after the two are assembled in place, the positions of the measuring probe 5 and the receiver 8 are aligned.

[0050] (6) Signal transmission. When assembling the crystallizer, connect the lead wire 9 of the receiver 8 on the crystallizer cooling water jacket 7 to the outlet specially opened on the crystallizer water tank 10, from which the crystallizer is led out. The outlet is provided with a seal to ensure that the water in the water tank does not leak; finally, connect the lead wire 9 to the data acquisition system for signal acquisition, conversion and display.

[0051] The present invention uses MEMS technology to integrate two sensors, heat flow and temperature sensors, on a small-sized substrate 3, and uses a copper screw measuring probe 5, which can not only detect both heat flow and temperature data at the same time, but also has the characteristics of rapid response of the detection data. Since the measuring probe 5 itself has a passive antenna 4 and no external lead, there is no cable in the water gap between the crystallizer copper tube 6 and the crystallizer cooling water jacket 7. The crystallizer copper tube 6 and the crystallizer cooling water jacket 7 components are independent and not connected by cables. On the one hand, it does not affect the cooling of the crystallizer copper tube 6. On the other hand, it greatly ensures the convenience of installation of the crystallizer copper tube 6 and the crystallizer cooling water jacket 7.

[0052] The present invention is suitable for measuring the heat flow and temperature of the copper tube wall of a crystallizer for continuous casting of small square billets / small round billets, and can be widely promoted in newly built and upgraded continuous casting of small square billets / small round billets.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A method for detecting a billet continuous casting mold, characterized in that: The following steps are involved: preparing at least one sensor, the sensor integrating a heat flow detection element and a temperature detection element and configured to have a data transmission function; Fixing the sensor at a predetermined position of the copper tube of the crystallizer; Receive the signal transmitted by the sensor through the receiving device, and transmit the signal to the data acquisition system; The data acquisition system processes and analyzes the detected heat flow and temperature data to monitor the heat flow and temperature changes of the crystallizer copper tube in real time.

2. The method for detecting a billet continuous casting mold according to claim 1, characterized in that: The micro sensor is manufactured by using MEMS technology.

3. The method for detecting a billet continuous casting mold according to claim 1, characterized in that: The sensor package is a measuring probe with a screw shape of M6×8.

4. The method for detecting a billet continuous casting mold according to claim 3, characterized in that: The outer wall of the crystallizer copper tube is provided with a measuring threaded hole matched with the measuring probe.

5. The method for detecting a billet continuous casting mold according to claim 4, characterized in that: A temperature-resistant sealing ring is arranged inside the measuring probe and the measuring threaded hole.

6. The method for detecting a billet continuous casting mold according to claim 4, characterized in that: A threaded through hole is arranged on the water jacket wall outside the copper tube of the crystallizer at a position matching the measuring threaded hole.

7. The method for detecting a billet continuous casting mold according to claim 1, characterized in that: The sensor is configured in a form with a wireless transmission function, and transmits the received signal in the form of a wireless signal.

8. The method for detecting a billet continuous casting mold according to claim 7, characterized in that: The receiving device receives the signal in the form of wireless reception, and transmits the received signal in the form of an external lead wire.

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