Slab continuous casting crystallizer testing device

Abstract

This utility model relates to a detection device for a slab continuous casting crystallizer, belonging to the technical field of continuous casting forming equipment. The copper plate of the crystallizer has several closely spaced elongated holes, and a measuring rod integrating a sensor unit is installed in each hole. The sensor unit includes a sensor body, a substrate, solder pads, and leads. The leads are electrically connected to a signal processing unit. The sensor unit detects temperature and heat flow signals and outputs the signals to the signal processing unit for acquisition and processing. The sensor body is encased in a shell, spring, and annular pressure plate to press the sensor body firmly into the through-hole of the measuring rod, with the measuring end of the sensor body pressed against the copper plate of the crystallizer. The sensor uses a MEMS micro / nano thin-film sensor, which is small in size and allows the sensor detection range to cover the entire copper plate of the crystallizer. The sensor unit integrates both temperature and heat flow sensors, simultaneously detecting temperature and heat flow signals, which is of great significance for improving production stability and billet quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of continuous casting equipment and relates to a slab continuous casting crystallizer detection device. Background Technology

[0002] In the continuous production of slabs, the temperature and heat flux density of the crystallizer copper plate play a crucial role in controlling the continuous casting process. Real-time monitoring of the crystallizer copper plate and heat flux density is essential. The cooling water volume of the crystallizer is calculated based on changes in the copper plate temperature. Furthermore, timely detection of changes in heat flux and temperature is crucial for preventing runaway steel. In the initial stages of runaway steel, significant abnormal changes in the crystallizer copper plate temperature will be observed. If these abnormal temperature changes are detected, the casting speed can be reduced promptly to effectively prevent runaway steel.

[0003] Currently, the method for measuring the temperature of the copper plate in the slab crystallizer is to use conventional thermocouples. However, conventional thermocouples have a long response time and slow reaction, making it impossible to detect instantaneous temperature changes in a timely manner. Due to structural limitations, a point-type measurement arrangement is used, typically 2-3 rows. To avoid the location of the cooling water gaps, the number of thermocouple rows installed along the width of the copper plate in the crystallizer is limited. The structure of the thermocouples, the arrangement of the crystallizer water gaps, and the arrangement of the bolts securing the copper plate and back plate limit the placement and number of thermocouples, preventing complete coverage of the entire copper plate. In practical applications, seal failure and water leakage often occur, leading to inaccurate thermocouple readings or even thermocouple failure. The resulting thermocouple replacements not only increase costs but also reduce the working efficiency of the continuous casting machine.

[0004] Currently, thermocouples are used to test the copper plates of the crystallizer, but they can only measure the temperature and cannot directly detect the heat flow.

[0005] Therefore, it is essential to use a sensor that can directly detect changes in temperature and heat flow and can fully cover changes in temperature and heat flow of the copper plate in the crystallizer. This is of great significance for improving the stability of continuous casting production and improving the quality of cast billets. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a slab continuous casting crystallizer detection device to solve the problem that the current device cannot cover the entire copper plate of the crystallizer for detection, and can simultaneously detect temperature and heat flow changes.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A slab continuous casting crystallizer testing device, characterized in that: it is installed on a copper plate of the crystallizer, and the copper plate of the crystallizer has a plurality of closely arranged elongated holes;

[0009] The detection device includes a measuring rod installed inside the elongated hole, and a plurality of sensor units are integrated on the measuring rod. The sensor units are electrically connected to the signal processing unit.

[0010] Each of the sensor units integrates a temperature sensor and a heat flow sensor, and is capable of detecting temperature signals and heat flow signals; the detected signals are output to the signal processing unit for acquisition and processing.

[0011] Optionally, the sensor unit includes a sensor body, a housing, and an external signal line; the housing is fitted onto the sensor body, and the external signal line is connected to the sensor body.

[0012] Optionally, the encapsulation shell is cylindrical, and a high-temperature curing adhesive is provided between the sensor body and the encapsulation shell for filling, so that the sensor unit formed after encapsulation has a cylindrical structure.

[0013] Optionally, the cylindrical sensor unit has a diameter of less than or equal to 3 mm and a length of less than or equal to 6 mm.

[0014] Optionally, the sensor body includes a sensor element, a substrate, pads, and leads; the sensor element and pads are sequentially disposed on the substrate, and the leads are led out from the sensor element and connected to the pads; one end of the external signal line is also connected to the pads, and the other end is electrically connected to the signal processing unit.

[0015] Optionally, the encapsulation shell is fitted with a spring and an annular pressure plate, which press the sensor body into the through mounting hole of the measuring rod, and the measuring end of the sensor body is in close contact with the crystallizer copper plate.

[0016] Optionally, the interval between adjacent measuring rods is greater than or equal to 20 mm.

[0017] Optionally, the sensor unit is a MEMS micro / nano thin film sensor.

[0018] Optionally, the measuring rod is a metal measuring rod with a diameter of 9 to 12 mm.

[0019] Optionally, the elongated hole is provided between every two adjacent water slits on the copper plate of the crystallizer.

[0020] The beneficial effects of this utility model are as follows:

[0021] To address the issues of long response time, slow reaction, and inability to fully cover the entire copper plate of the crystallizer when using conventional thermocouples for temperature detection, this invention proposes a detection device for the copper plate of a slab crystallizer. This device solves the problem of not being able to cover the entire copper plate of the crystallizer, as well as the problems of inaccurate or malfunctioning detection, and the inability to detect heat flow while only detecting temperature.

[0022] This novel micro / nano thin-film sensor utilizes MEMS technology, resulting in a small size that allows for multi-point sensor placement, enabling the sensor's detection range to cover the entire working area of ​​the copper plate. It can simultaneously detect both heat flow and temperature data, and features rapid data response. The measuring rod is completely isolated from cooling water, eliminating the need for a water seal and preventing water leakage due to seal failure, which could lead to inaccurate or even malfunctioning thermocouples. The cylindrical sensor incorporates springs and pressure plates to ensure a tight bond between the sensor and the copper plate wall of the crystallizer, guaranteeing the accuracy of the detected data. Each sensor unit on the measuring rod is independent, facilitating disassembly and replacement; measuring rods integrating a row of sensors also allow for convenient disassembly and installation.

[0023] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a plan view of the copper plate layout for the crystallizer;

[0026] Figure 2 for Figure 1 AA cross-sectional view of the copper plate and back plate of the middle crystallizer;

[0027] Figure 3 for Figure 1 BB cross-sectional view of the copper plate of the crystallizer;

[0028] Figure 4 for Figure 1 CC cross-section of the copper plate in the crystallizer;

[0029] Figure 5 This is a cross-sectional schematic diagram of the measuring rod;

[0030] Figure 6 This is a schematic diagram of the sensor unit structure.

[0031] Figure reference numerals: 1 Crystallizer copper plate, 11 Water gap, 12 Long hole, 2 Back plate, 3 Measuring rod, 4 Sensor unit, 41 Sensor body, 411 Sensor sensing element, 412 Substrate, 413 Pad, 414 Lead, 42 Package housing, 43 External signal line, 44 Spring, 45 Pressure plate. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0034] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] Example 1

[0036] Please see Figures 1-6 This is a detection device for a slab continuous casting crystallizer, installed on the copper plate 1 of the crystallizer. Several closely spaced elongated holes 12 are formed inside the copper plate 12; measuring rods 3 are installed inside the elongated holes 12, and several sensor units 4 are integrated on the measuring rods 3. The sensor units 4 are electrically connected to a signal processing unit. Each sensor unit 4 integrates a temperature sensor and a heat flow sensor, capable of detecting temperature and heat flow signals; the detected signals are output to the signal processing unit for acquisition and processing.

[0037] The copper plate 1 of the crystallizer is both the target to be inspected and the carrier for installing measuring components. An elongated hole 12 for installing measuring rod 3 is opened within the entire working surface of the copper plate 1 of the crystallizer. The elongated hole 12 is opened independently and is isolated from the positions of the bolts between the crystallizer water gap 11, the fastening copper plate and the back plate 2.

[0038] The sensor unit 4 includes a sensor body 41, a housing 42, and an external signal line 43; the housing 42 is fitted onto the sensor body 41, and the external signal line 43 is connected to the sensor body 41.

[0039] The sensor body 41 includes a sensor element 411, a substrate 412, a pad 413, and a lead 414. The sensor element 411, the pad 413, and the lead 414 are disposed on the substrate 412 using MEMS processes such as photolithography and sputtering. The lead 414 is led out from the sensor element 411 and connected to the pad 413. One end of the external signal line 43 is also connected to the pad 413, and the other end is electrically connected to the signal processing unit.

[0040] The encapsulation shell 42 is cylindrical, and a high-temperature curing adhesive is used to fill the space between the sensor body 41 and the encapsulation shell 42, resulting in a cylindrical sensor unit 4 after encapsulation. A spring 44 and an annular pressure plate 45 are fitted onto the encapsulation shell 42, which press the sensor body 41 into the through mounting hole of the measuring rod 3. The measuring end of the sensor body 41 is in close contact with the crystallizer copper plate 1.

[0041] Sensor unit 4 is a MEMS micro / nano thin film sensor.

[0042] Example 2

[0043] Based on the above embodiment one, this embodiment further specifies that the cylindrical sensor unit 4 has a diameter less than or equal to 3 mm and a length less than or equal to 6 mm. The interval between adjacent measuring rods 3 (i.e., the distance between adjacent elongated holes 12) is greater than or equal to 20 mm.

[0044] The measuring rod 3 is a metal measuring rod, preferably a stainless steel rod or a copper rod, with a diameter of 9-12 mm. In some embodiments of this utility model, the diameter of the measuring rod 3 is preferably 10 mm.

[0045] The arrangement and number of thermocouples are limited by the structure of the thermocouples, the layout of the cooling water slits 11 in the crystallizer, and the arrangement of the bolts connecting and fastening the copper plate and the back plate 2, preventing them from fully covering the entire copper plate. This invention employs small-sized micro / nano film sensors densely packed on a slender metal measuring rod 3, which is then inserted into the mounting holes of the crystallizer copper plate 1. Based on actual production needs, micro / nano film sensors are densely packed at small intervals along the length of the crystallizer copper plate 1 from top to bottom; the minimum spacing between adjacent sensor units 4 can be 20mm; and in the width direction of the crystallizer copper plate 1, an elongated hole 12 is provided between every two adjacent water slits 11, with the micro / nano film sensor installed within the elongated hole 12.

[0046] The manufacturing and installation of this utility model includes the following steps:

[0047] (1) Sensor fabrication.

[0048] A micro / nano-thin film sensor based on a tiny substrate is fabricated using MEMS processes such as photolithography and sputtering. A heat flow sensor and a temperature sensor are arranged at the front end of a sensor substrate 412 to form a sensor sensing element 411, which is covered with a protective layer. A bonding pad 413 is provided at the rear end of the substrate 412, forming the sensor body 41. Due to the MEMS process used, the overall size of the sensor body 41 can be controlled to be relatively small. The signals from the heat flow sensor and the temperature sensor are led out through signal lines connected to the corresponding bonding pads 413.

[0049] The sensor body 41 integrates two sensor elements, one for temperature and one for heat flow, onto a single substrate 412. It can simultaneously detect both temperature and heat flow signals and features a small size and fast response. The sensor body 41 can be made to a size not exceeding 2.5mm × 6mm.

[0050] (2) Sensor packaging.

[0051] Each sensor body 41 is independently packaged into a sensor unit 4. First, a stainless steel thin-walled cylindrical encapsulation shell 42 is stamped. The outer diameter of the encapsulation shell 42 is determined according to the size of the sensor body 41 and needs to be controlled as small as possible. The outer diameter does not exceed 3mm, the inner diameter does not exceed 2.5mm, and the length does not exceed 6mm. The front end is a blind end. The micro-nano thin film sensor body 41 is installed into the encapsulation shell 42, and high-temperature adhesive is filled inside and cured to encapsulate it into a small cylindrical sensor. The size can be controlled within 3mm in diameter and 6mm in length.

[0052] (3) Fabrication of measuring rod 3.

[0053] According to the measurement requirements, multiple measuring rods 3 are manufactured. The measuring rods 3 are preferably made of stainless steel or copper, with a diameter of approximately 10mm. Their length is determined by the measurement requirements, and can be up to the same length as the copper plate 1 of the crystallizer. Based on the distance to be detected on the copper plate 1 of the crystallizer, through-holes are drilled at corresponding positions on the measuring rods 3. Theoretically, a sensor can be placed at intervals not exceeding 20mm. Within the mounting holes, springs 44 push the cylindrical sensor unit 4 out of the mounting hole of the measuring rod 3, slightly protruding beyond the edge of the mounting hole. The sensor unit 4 also has a certain range of expansion and contraction within the mounting hole, ensuring that the measuring end of the sensor unit 4 can tightly contact the copper plate 1 of the crystallizer when the measuring rod 3 is installed on the copper plate. Each micro / nano film sensor is an independent unit on the measuring rod 3 and can be replaced and installed individually.

[0054] (4) Making the copper plate 1 for the crystallizer.

[0055] The crystallizer copper plate 1 includes a hot surface and a cold surface. The hot surface is in direct contact with the molten steel, while the cold surface has a cooling water slit 11. The cold surface and the back plate 2 are connected by fastening bolts to form a cooling water chamber for cooling. The heat of the molten steel is carried away through the copper plate-cooling water system, forming a billet shell. Based on the characteristics of micro / nano thin-film sensors, this invention employs an independently mounted elongated hole 12. Since the sensor, packaged, and assembled using MEMS technology is small, theoretically, an elongated mounting hole 12 for the measuring rod 3 can be opened between every two water slits 11. The elongated hole 12 is isolated from the water slit 11 and the connecting bolts, thus completely isolating it from the cooling water, eliminating the need for additional water sealing.

[0056] (5) Install measuring rod 3.

[0057] The measuring rod 3 equipped with sensor unit 4 is inserted into the elongated hole 12 of the copper plate 1 of the crystallizer. Since each sensor unit 4 on the measuring rod 3 is fitted with a spring 44, the sensor measuring end is guaranteed to be in perpendicular contact with the copper plate by directional limiting.

[0058] (6) Signal extraction and signal processing.

[0059] The lead wire 414 of the sensor unit 4 is led out from the top of the copper plate 1 through the long hole 12 of the copper plate 1 of the crystallizer. The signals of each sensor are connected to the connector next to the continuous casting machine for easy disassembly and connection. Then it is connected to the signal processing unit for heat flow and temperature signal acquisition, conversion and display.

[0060] This utility model provides a sensor detection device for a slab continuous casting crystallizer, which can simultaneously detect both heat flow and temperature data, and features rapid response of the detected data; the measurement range can cover the entire working surface of the crystallizer; the detection device is completely isolated from the cooling water, eliminating the need for water sealing, and the working environment is good; each measurement unit is independent, making it easy to disassemble and replace; the measuring rod 3, which integrates a row of sensors, is easy and simple to install and disassemble.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A slab continuous casting crystallizer testing device, characterized in that: It is set on the copper plate (1) of the crystallizer, and the copper plate (1) of the crystallizer has a plurality of closely arranged elongated holes (12); The detection device includes a measuring rod (3) installed inside the elongated hole (12), and a plurality of sensor units (4) are integrated on the measuring rod (3). The sensor units (4) are electrically connected to the signal processing unit. Each of the sensor units (4) is integrated with a temperature sensor and a heat flow sensor, and is capable of detecting temperature signals and heat flow signals; the detected signals are output to the signal processing unit for acquisition and processing.

2. The slab continuous casting crystallizer detection device according to claim 1, characterized in that: The sensor unit (4) includes a sensor body (41), a package shell (42), and an external signal line (43); the package shell (42) is sleeved on the sensor body (41), and the external signal line (43) is connected to the sensor body (41).

3. The slab continuous casting crystallizer detection device according to claim 2, characterized in that: The encapsulation shell (42) is cylindrical, and a high-temperature curing adhesive is provided between the sensor body (41) and the encapsulation shell (42) for filling. The sensor unit (4) formed after encapsulation has a cylindrical structure.

4. The slab continuous casting crystallizer detection device according to claim 3, characterized in that: The cylindrical sensor unit (4) has a diameter of less than or equal to 3 mm and a length of less than or equal to 6 mm.

5. The slab continuous casting crystallizer detection device according to claim 2, characterized in that: The sensor body (41) includes a sensor sensing element (411), a substrate (412), a pad (413), and a lead wire (414). The sensor sensing element (411) and the pad (413) are sequentially disposed on the substrate (412). The lead wire (414) is led out from the sensor sensing element (411) and connected to the pad (413). One end of the external signal line (43) is also connected to the pad (413), and the other end is electrically connected to the signal processing unit.

6. The slab continuous casting crystallizer detection device according to claim 2, characterized in that: A spring (44) and an annular pressure plate (45) are fitted on the encapsulation shell (42). The spring (44) and the annular pressure plate (45) press the sensor body (41) into the through mounting hole of the measuring rod (3). The measuring end of the sensor body (41) is in close contact with the crystallizer copper plate (1).

7. The slab continuous casting crystallizer detection device according to claim 1, characterized in that: The interval between adjacent measuring rods (3) is greater than or equal to 20 mm.

8. The slab continuous casting crystallizer detection device according to claim 1, characterized in that: The sensor unit (4) is a MEMS micro / nano thin film sensor.

9. The slab continuous casting crystallizer detection device according to claim 1, characterized in that: The measuring rod (3) is a metal measuring rod (3) with a diameter of 9 to 12 mm.

10. The slab continuous casting crystallizer detection device according to claim 1, characterized in that: The elongated hole (12) is provided between every two adjacent water slits (11) on the copper plate (1) of the crystallizer.

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