WO2016163536A1 - 連続鋳造用鋳型 - Google Patents
連続鋳造用鋳型 Download PDFInfo
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- WO2016163536A1 WO2016163536A1 PCT/JP2016/061606 JP2016061606W WO2016163536A1 WO 2016163536 A1 WO2016163536 A1 WO 2016163536A1 JP 2016061606 W JP2016061606 W JP 2016061606W WO 2016163536 A1 WO2016163536 A1 WO 2016163536A1
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- WIPO (PCT)
- Prior art keywords
- temperature detection
- insertion hole
- sensor
- temperature
- mold
- Prior art date
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 58
- 238000003780 insertion Methods 0.000 claims abstract description 156
- 230000037431 insertion Effects 0.000 claims abstract description 156
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- 229910052802 copper Inorganic materials 0.000 abstract description 153
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
- B22D2/006—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the temperature of the molten metal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/12—Protective devices, e.g. casings for preventing damage due to heat overloading
- G01K1/125—Protective devices, e.g. casings for preventing damage due to heat overloading for siderurgical use
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/146—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations arrangements for moving thermometers to or from a measuring position
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/247—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet using distributed sensing elements, e.g. microcapsules
Definitions
- the present invention relates to a continuous casting mold for producing a slab by solidifying molten steel while cooling.
- the continuous casting mold is a mold formed using a copper plate.
- a space corresponding to the thickness and width of a cast piece to be cast is formed by a copper plate, and the space penetrates in the vertical direction.
- the outer surface (cooling surface) side of the copper plate is cooled.
- the molten steel poured into the mold from above the continuous casting mold is cooled and pulled downward while solidifying from the portion in contact with the inner surface (molten steel surface) of the copper plate.
- the mold is cooled by water-cooling the outer surface of the copper plate.
- a large number of water guide grooves 2c are formed on the outer surface (cooling surface) 2b of the copper plate 2 constituting the mold.
- the outer surface 2b of the copper plate 2 suppresses deformation of the copper plate 2 due to thermal stress generated in the copper plate 2 and is a copper lid called a back plate 4 which is a strength member for maintaining the dimension shape in the mold.
- the bolts 8 are fixed at a plurality of locations. Thereby, the opening part of the water guide groove 2c is covered with the back plate 4, and the flowing water channel through which cooling water flows is formed.
- the copper plate 2 is provided with a hole 2d formed from the back plate 4 side to the copper plate 2 through the back plate 4 while avoiding the water guide groove 2c.
- a temperature detector 6 for detecting the mold temperature is inserted into the hole 2d.
- a sheathed thermocouple or the like is used as the temperature detection unit 6.
- the detection result of the temperature detection unit 6 is provided to monitor the situation in the mold, and is used, for example, to detect troubles such as a breakout in which a shell that is a solidified portion on the outer surface of the molten steel breaks and the molten steel leaks.
- the temperature distribution generated in the copper plate 2 is said to reflect the flow of molten steel in the mold, and the detection result of the temperature detector 6 is also used for monitoring the quality of the slab. ing.
- the temperature detection unit 6 is inserted into the hole 2 d from the back plate 4 side, and is installed with the fixing unit 6 a fixed to the back plate 4.
- the fixing portion 6 a is, for example, a screw member, and can be fixed to the back plate 4 by being screwed into a screw groove formed near the opening of the hole 2 d of the back plate 4.
- the temperature detection part 6 is arrange
- the temperature detection unit 6 when the temperature detection unit 6 is arranged as shown in FIG. 19, the hole 2 d into which the temperature detection unit 6 is inserted and the water guide groove 2 c are formed adjacent to each other in the copper plate 2. For this reason, the cooling water flowing through the water guide groove 2c enters the hole 2d through the gap between the cooling surface 2b of the copper plate 2 and the one side surface 4a of the back plate 4 opposed thereto, and the temperature detection unit 6 detects the temperature. May interfere.
- the temperature detection points are increased significantly with respect to the existing mold, the number of holes 2d increases, so that the probability of water entering the holes 2d increases, and there is a problem due to a decrease in strength of the back plate 4 (water There are also concerns such as intrusion of copper and increased thermal strain deformation of the copper plate.
- the interval between the adjacent water guide grooves 2c may be wider in the portion where the temperature detection unit 6 is installed between the water guide grooves 2c than in the portion where the temperature detection unit 6 is not installed. Therefore, if the hole 2d is newly formed between the water guide grooves 2c with respect to the existing mold and the temperature detection unit 6 is installed, the average value of the distance between the water guide grooves 2c increases, and the cooling efficiency may be reduced. .
- the temperature detection unit 6 is also a consumable item that is replaced with a new one during mold maintenance, and the number of the temperature detection unit 6 may not be easily increased.
- thermocouple used as the temperature detection unit 6 a non-grounded sheath thermocouple having an outer diameter of 3.2 mm is used from the viewpoint of durability and suppression of electromagnetic noise.
- This thermocouple has a thickness of a metal (for example, stainless steel) occupying about 10% (ie, about 0.3 mm) or more of the outer diameter, and a strand (Ni) having a diameter of about 15% or more of the outer diameter. , Cr alloy), the heat capacity of the electrical insulation material that occupies them, and the variation in responsiveness due to the variation in the contact thermal resistance between the outer surface of the sheath and the inner surface of the copper plate hole, etc. is there.
- Fiber Bragg Grating (hereinafter referred to as “Fiber Bragg Grating”), which can be installed more easily than thermocouples and can be installed more easily than thermocouples.
- FBG Fiber Bragg Grating
- An FBG sensor is one type of optical fiber sensor, in which a plurality of layers having different refractive indexes are formed on a core of an optical fiber to form a grating, and only light having a wavelength specified by the grating interval and the refractive index is reflected or transmitted. It has a structure to make.
- the lattice period of the FBG changes due to the change in refractive index and strain (ie, expansion and contraction) due to the temperature of the FBG, and the reflected wavelength changes. Therefore, the temperature at the position of the FBG can be obtained by inputting white light (light having a spectrum that smoothly spreads over a wide wavelength range) to the FBG sensor and detecting the wavelength of the reflected light with a spectroscope.
- the temperature detection point can be determined by the detection wavelength range, the temperature range, etc., and therefore, for example, several tens of temperature detection points are arranged at an arbitrary position with respect to one optical fiber. Can do. At this time, the interval between the temperature detection points can be set to about 10 mm, which is excellent in spatial resolution. Further, since the light transmitted through the optical fiber is used for signal transmission, there is an advantage that it is not affected by electrical noise such as an electromagnetic brake.
- the FBG sensor is generally fixed and installed in a copper plate as in Patent Document 1, for example, and it is difficult to easily attach and detach the FBG sensor to and from the copper plate.
- the FBG sensor is fixed and installed on the copper plate, the FBG sensor is also discarded every time the copper plate is replaced, and cannot be used repeatedly.
- the present invention has been made in view of the above problems, and an object of the present invention is to detect a temperature of the copper plate with high accuracy and to be easily attached to and detached from the copper plate. And providing a new and improved continuous casting mold.
- a mold body of a continuous casting mold a temperature detection unit that is inserted through an insertion hole formed in the mold body and detects the temperature inside the mold
- the temperature detector includes an FBG (Fiber Bragg Grating) sensor inserted in a radially deformable protective tube, and a groove formed along the longitudinal direction.
- the FBG sensor extends along the longitudinal direction.
- a supporting member that is supported by the support member, and at a temperature detection point, the supporting member that is stretched on the opening portion of the groove on the supporting member and the inner surface of the insertion hole sandwich the protective tube in which the FBG sensor is inserted.
- a continuous casting mold is provided.
- a mold body for a continuous casting mold and a temperature detection unit that is inserted through an insertion hole formed in the mold body and detects the temperature inside the mold the temperature detection unit is a protection that can be deformed in the radial direction.
- Two FBG sensors respectively inserted into the pipes, and two radially opposing grooves are formed along the longitudinal direction, and support members that support the two FBG sensors along the longitudinal direction,
- a continuous casting mold in which a protection member into which an FBG sensor is inserted is sandwiched between a tension member stretched at the opening of each of two grooves and an inner surface of an insertion hole at a temperature detection point. Is done.
- one of the FBG sensors may be disposed on the molten steel surface side of the mold body, and the other of the FBG sensors may be disposed on the cooling surface side of the mold body.
- the temperature detection unit may be inserted from at least one of the upper side, the lower side, and the side of the mold body.
- the FBG sensor may be arranged on the diameter in the thickness direction of the mold body in the insertion hole.
- the protective tube has an inner diameter of 0.5 mm or less and is configured such that the inner diameter of the protective tube is larger than the outer diameter of the FBG sensor even when deformed in the radial direction.
- the support member may include a small-diameter portion in which the extending member is provided in the longitudinal direction and a large-diameter portion having a larger diameter than the small-diameter portion, and the temperature detection point of the FBG sensor may be located in the small-diameter portion. Good.
- the FBG sensor is provided between the outer side of the tension member and the inner surface of the insertion hole at the temperature detection point, and is provided on the inner side of the tension member facing the inner surface of the groove in a small diameter portion not including the temperature detection point. You may do it.
- tension member for example, a thread-like or film-like heat-resistant fiber may be used.
- a continuous casting mold that can detect the temperature of a copper plate with high accuracy and includes a temperature detection unit that can be easily attached to and detached from the copper plate.
- FIG. 6 is a partially enlarged view of a region I of the support member shown in FIG.
- FIG. 7 is a cross-sectional view taken along the line DD in FIG. 6.
- FIG. 7 is a cross-sectional view taken along the line EE in FIG. 6.
- FIG. 7 is a cross-sectional view taken along the line Es-Es in FIG. 6, wherein the left figure shows a state before insertion into the insertion hole, and the right figure shows a state after insertion into the insertion hole.
- FIG. 14 is a cross-sectional view taken along the line DD in FIG. 13. It is sectional drawing in the EE cutting
- disconnection line of FIG. FIG. 14 is a cross-sectional view taken along the line Es-Es in FIG.
- thermocouple 13 where the left figure shows a state before insertion into the insertion hole, and the right figure shows a state after insertion into the insertion hole.
- FIG. 13 It is a schematic perspective view which shows the outline of the experimental equipment in an Example. It is a graph which shows the output result of the temperature detection part after heating block introduction, two thermocouples, and the thermocouple inside a case. It is explanatory drawing explaining the temperature measuring method of the conventional copper plate using a thermocouple.
- FIG. 1 is a schematic perspective view showing a schematic configuration of a continuous casting mold 10 according to the present embodiment.
- FIG. 2 is a schematic perspective view showing the copper plate 14A on the short side of the continuous casting mold 10 according to the present embodiment.
- FIG. 3 is a schematic perspective view showing the partition plate 16 of the continuous casting mold 10 according to the present embodiment.
- the X direction is the mold thickness
- the Y direction is the mold width
- the Z direction is the mold height.
- a continuous casting mold 10 (hereinafter, also simply referred to as “mold”) is a mold formed using a copper plate, as shown in FIG. 1, and has long copper plates 12A and 12B and a short copper plate 14A. , 14B.
- the sizes of the copper plates 12A, 12B, 14A, and 14B are determined by the thickness and width of the slab to be manufactured. For example, when manufacturing a slab for a steel plate, the lengths of the long side copper plates 12A and 12B are about a few meters in width (length in the Y direction), less than 1 m in height (length in the Z direction), and thickness. (Length in the X direction) is about 30 to 40 mm.
- the short side copper plates 14A and 14B have a width (length in the X direction) of about 250 mm, a height (length in the Z direction) of about 1 m, and a thickness (length in the Y direction) of 30 to 40 mm. Degree.
- the side surfaces (surfaces in the X direction) 14c and 14d of the short-side copper plates 14A and 14B are provided so as to be in contact with the molten steel surfaces of the long-side copper plates 12A and 12B, respectively, as shown in FIG.
- the mold width can be changed by moving the short side copper plates 14A and 14B in the Y direction along the molten steel surfaces of the long side copper plates 12A and 12B.
- the upper surface is the upper surface 14a and the lower surface is the lower surface 14b.
- the surface of the width direction (X direction) is made into the side surfaces 14c and 14d, and among the surfaces in the thickness direction (Y direction), the surface in contact with the molten steel is made the molten steel surface 14e, and the other surface is made the cooling surface 14f.
- FIG. 2 shows the copper plate 14A, the same applies to the copper plate 14B.
- the surface on the Y axis positive direction side is the molten steel surface 14e
- the surface on the Y axis negative direction side is the cooling surface 14f.
- the continuous casting mold 10 may be provided with a copper plate as an intermediate partition plate 16 inside the mold 10 as shown in FIG.
- the intermediate partition plate 16 By providing the intermediate partition plate 16, the internal space of the mold 10 into which molten steel is poured is divided into two, and two cast pieces can be manufactured in parallel.
- the upper surface is defined as the upper surface 16 a, the lower surface as the lower surface 16 b, and the width direction (X direction).
- the middle partition plate 16 has molten steel surfaces 16e and 16f that are in contact with the molten steel in the thickness direction (Y direction).
- the copper plate 12A, 12B, 14A, 14B constituting the mold 10 and the molten steel surface in contact with the molten steel of the partition plate 16 are plated with Ni or the like as a main component.
- the mold 10 penetrates in the vertical direction, and molten steel is poured from the pouring nozzles 20A and 20B installed above the mold 10, and the molten steel is pulled out from below while solidifying.
- the outer surface (cooling surface) side of the copper plate is cooled. Therefore, the molten steel poured into the mold from above the mold 10 is cooled and pulled downward while solidifying from the portion in contact with the molten steel surface.
- the molten steel surfaces of the copper plates 12A, 12B, 14A, 14B and the partition plate 16 are scraped, and deterioration such as reduction of plating applied to the surfaces occurs. For this reason, the copper plates 12A, 12B, 14A, 14B and the partition plate 16 are removed from the continuous casting machine together with the back plate after a certain period of use, and after the molten steel surface is trimmed to a flat surface by about several mm, plating is performed. Is given. Thereafter, it is assembled again to the back plate and reused.
- the continuous casting mold 10 is provided with a temperature detection unit 100 for detecting the mold temperature. Based on the detection result of the temperature detection unit 100, it is possible to detect troubles during continuous casting and monitor the flow of molten steel in the mold.
- an FBG sensor is used as the temperature detection unit 100. The detailed configuration of the temperature detection unit 100 will be described later.
- the temperature detection unit 100 is formed by fixing the FBG sensor to a rod-shaped support member, and is installed by being inserted into a hole formed in the copper plate of the mold 10.
- the insertion hole into which the temperature detection unit 100 is inserted is preferably formed at a position where the temperature detection unit 100 can be easily detached from the copper plate.
- insertion holes can be formed in the upper and lower surfaces of the copper plates 12A, 12B, 14A, and 14B and the side surfaces of the copper plates 12A and 12B.
- insertion holes 12h are formed in the side surface of the copper plate 12B
- insertion holes 14h and 14h are formed in the upper surfaces of the copper plates 14A and 14B, respectively.
- the temperature detection unit 100 according to the present embodiment can be installed by being inserted also from the upper surface of the partition plate 16.
- the insertion holes formed in these copper plates are pores having an inner diameter of about 3 to 4 mm, and are formed with a depth of, for example, 150 mm or more. Therefore, the mold 10 provided with the temperature detection unit 100 according to the present embodiment can be configured with small modifications to the existing mold.
- FIG. 4 is a schematic cross-sectional view showing a temperature detection point state of the temperature detection unit 100 according to the present embodiment installed in the insertion hole 14h of the copper plate 14A of the continuous casting mold 10.
- the molten steel surface 14e of the copper plate 14A is located on the left side of the paper surface
- the cooling surface 14d of the copper plate 14A is located on the right side of the paper surface.
- FIG. 4 and FIGS. 5 and 8 to 10 described later some members constituting the temperature detecting unit 100 are exaggerated for explanation.
- the temperature detection unit 100 inserted into the insertion hole 14h of the short-side copper plate 14A will be described.
- the temperature detection unit 100 is similar to the insertion hole of another copper plate of the mold 10. Installed.
- the temperature detection unit 100 includes a support member 110, a tension member 120, and a sensor unit 130, as shown in FIG.
- the sensor unit 130 is configured by inserting an FBG sensor 131 that detects the temperature of the copper plate 14 ⁇ / b> A into a hollow protective tube 135.
- the protective tube 135 is provided to prevent damage to the FBG sensor 131.
- the sensor unit 130 is fixed to the support member 110 and inserted into the insertion hole 14h of the copper plate 14A.
- a groove 111 is formed in the support member 110 that supports the sensor unit 130 along the longitudinal direction.
- a tension member 120 having heat resistance is provided on the outer peripheral surface of the support member 110.
- the tension member 120 is, for example, a thread-like or film-like member, and is provided in a state where the tension member 120 is tightly attached to the opening portion of the groove 111.
- a portion of the tension member 120 that is stretched to the opening portion of the groove 111 is referred to as a tension portion 122.
- the sensor unit 130 is provided outside the extending portion 122.
- the sensor part 130 When inserted into the insertion hole 14h, the sensor part 130 is pressed against the extension part 122 by the inner surface of the insertion hole 14h, but the extension part 122 is hardly bent by this pressing force and maintains the tensioned state. To do.
- the protective tube 135 of the sensor unit 130 is pushed toward the center of the protective tube 135 by the inner surface of the insertion hole 14h and the outer side of the extending portion 122, and is deformed in the radial direction. Thereby, the temperature detection point of the sensor part 130 is suppressed from moving in the insertion hole 14h, and is fixed at a predetermined position in the insertion hole 14h.
- the sensor unit 130 is supported by the support member 110 via a stretched portion 122 stretched in the groove 111 of the support member 110. That is, the sensor unit 130 is not in contact with the support member 110 and is provided in a state separated from the support member 110. For this reason, the FBG sensor 131 of the sensor unit 130 is not easily affected by the heat of the support member 110, and can detect the temperature at the point M1 in the insertion hole 14h with high accuracy.
- Point M1 is the most upstream position in the heat flow direction, that is, the highest temperature position, on the inner surface of the insertion hole 14h.
- the temperature detection unit 100 of the continuous casting mold 10 has the following characteristics.
- A The sensor unit 130 in which the FBG sensor 131 is inserted into the protective tube 135 is provided.
- the inner diameter of the protective tube 135 is desirably 0.5 mm or less.
- B The sensor unit 130 is fixed using the tension member 120 while maintaining the state separated from the support member 110, and is inserted into the insertion hole of the copper plate of the continuous casting mold 10 and installed.
- C The protection tube 135 is sandwiched between the inner surface of the insertion hole 14 h and the tension member 120 at the temperature detection point of the sensor unit 130.
- the protection tube 135 can prevent the FBG sensor 131 from being damaged due to the feature (a). In addition, by setting the inner diameter of the protective tube 135 to 0.5 mm or less, it is possible to maintain a predetermined thermal response of the FBG sensor 131.
- the FBG sensor 131 is less affected by the heat of the support member 110 and can detect the temperature at a predetermined position of the copper plate (for example, point M1 shown in FIG. 4) with high accuracy. It becomes possible.
- the sensor unit 130 since the sensor unit 130 is inserted into and removed from the insertion hole of the copper plate of the continuous casting mold 10 together with the support member 110, the sensor unit 130 can be easily inserted and removed, and the sensor unit 130 can be used repeatedly.
- the temperature detection unit 100 of the continuous casting mold 10 can detect the temperature of a predetermined position of the copper plate (for example, point M1 shown in FIG. 4) with high accuracy and can be easily attached to and detached from the copper plate. It is possible. Hereinafter, the detailed structure of each part which comprises the temperature detection part 100 is further demonstrated.
- FIG. 5 is a schematic side view showing an outline of the support member 110 according to the present embodiment.
- 6 is a partially enlarged view of the support member 110 shown in FIG. 5.
- the upper diagram shows a state seen from the right side of FIG. 4, and the lower diagram shows a state seen from the left side of FIG.
- the support member 110 is a member that supports the sensor unit 130.
- a cylindrical metal rod for example, a copper rod
- the support member 110 is provided with the sensor unit 130 so that the longitudinal direction corresponds to the longitudinal direction of the sensor unit 130. At this time, as shown in FIG. 5, one or a plurality of temperature detection points P of the sensor unit 130 can be provided in the longitudinal direction of the support member 110.
- the support member 110 includes a large-diameter portion 112 and a small-diameter portion 114 as shown in FIG.
- the large diameter portion 112 prevents the support member 110 from rattling when inserted into the insertion hole 14h.
- the large diameter portion 112 is formed to have an outer diameter slightly smaller than the inner diameter of the insertion hole 14h of the copper plate 14A.
- the clearance between the insertion hole 14h and the large diameter portion 112 may be about 0.1 mm.
- a clearance relationship between a hole for clearance fit and a shaft shown in JIS standards or the like may be used.
- the small diameter portion 114 has an outer diameter smaller than that of the large diameter portion 112.
- the small diameter portion 114 is a portion where the tension member 120 is provided.
- the tension member 120 is wound around the circumference.
- the small-diameter portion 114 is formed in order to escape the thickness so that the tension member 120 does not contact the inner surface of the insertion hole 14h when the temperature detection unit 100 is installed in the insertion hole 14h of the copper plate 14A.
- the diameter of the small-diameter portion 114 is set according to the size of each portion such as the thickness of the tension member 120 and the outer diameter of the protective tube 135, and is set to be about 0.2 mm smaller than the diameter of the large-diameter portion 112, for example.
- the sensor unit 130 is fixed to the support member 110 so that the temperature detection point P is positioned at the small diameter portion 114.
- the support member 110 is formed with such large-diameter portions 112 and small-diameter portions 114 alternately. Note that the large-diameter portions 112 and the small-diameter portions 114 do not have to be provided alternately at all locations of the support member 110 as shown in FIG. Further, in the support member 110 according to the present embodiment, the length of the large-diameter portion 112 in the longitudinal direction is about half the length of the small-diameter portion 114, but the present invention is not limited to this example, and the length is The length can be set as appropriate, and the lengths of the large diameter portion 112 and the small diameter portion 114 may be different.
- the support member 110 is formed with one groove 111 along the longitudinal direction.
- the support member 110 is made of a metal member.
- the support member 110 has a clearance with the insertion hole 14h of the mold 10, it does not always have the same temperature as the inner surface of the insertion hole 14h.
- the FBG sensor 131 is also affected by the temperature of the support member 110, and the measurement accuracy is lowered. Therefore, the groove 111 is formed in the support member 110, and the sensor unit 130 and the support member 110 are separated from each other by fixing the sensor unit 130 to the support member 110 along the groove 111 using a tension member 120 described later. Can be made. Thereby, the temperature influence which the sensor part 130 receives from the supporting member 110 can be made small. A method for fixing the sensor unit 130 to the support member 110 will be described later.
- the groove 111 of the support member 110 has a substantially square cross-sectional space as shown in FIG.
- this invention is not limited to this example,
- channel 111 may be triangular shape or semicircle shape, for example.
- the tension member 120 fixes the sensor unit 130 to the support member 110, and, as shown in FIG. 4, the protective tube 135 of the sensor unit 130 inserted into the insertion hole 14h of the copper plate 14A is connected to the inner peripheral surface of the insertion hole 14h. It is a member pressed against As the tension member 120, a thread-like or film-like member having elasticity and heat resistance is preferably used. For example, a Kevlar (registered trademark) thread or the like can be used. A plurality of tension members 120 are provided in the small diameter portion 114 of the support member 110 and are stretched in the opening portion of the groove 111.
- the tension member 120 when the thread-like tension member 120 is used, the tension member 120 is wound around the outer periphery of the small-diameter portion 114 of the support member 110 once or several times so as to be stretched at the opening portion of the groove 111 as shown in FIG. Turned. A portion of the tension member 120 that is stretched at the opening portion is a tension portion 122.
- the tension member 120 presses and fixes the sensor unit 130 to the inner surface of the insertion hole 14h with the outer surface of the tension portion 122.
- the sensor unit 130 is positioned in the space of the groove 111 on the inner surface of the extending member 120 at the portion located in the small diameter portion 114 of the support member 110.
- FIG. 7 is a schematic explanatory diagram for explaining the principle of the FBG sensor 131.
- FIG. 8 is a graph showing the responsiveness of the FBG sensor 131 when the diameter of the protective tube 135 is changed.
- the sensor unit 130 according to the present embodiment includes an FBG sensor 131 that detects the temperature of the copper plate 14 ⁇ / b> A and a protective tube 135 that protects the FBG sensor 131.
- the FBG sensor 131 is one of optical fiber sensors, and detects changes in temperature and strain as changes in light wavelength. As shown in FIG. 7, the FBG sensor 131 includes a core part 132 through which light propagates, a cladding part 133 that covers the outer periphery of the core part 132, reflects stray light back to the core part 132, and the outer periphery of the cladding part 133.
- the cover part 134 covers and protects the core part 132 and the clad part 133 from the external environment.
- the core part 132 is provided with an FBG 132a formed by stacking a plurality of layers having different refractive indexes.
- the covering portion 134 may not be provided in the present invention.
- the FBG 132a has a structure that reflects or transmits only light having a wavelength specified by the lattice spacing and the refractive index.
- the FBG 132a expands and contracts due to a temperature change, the grating period changes, and the wavelength of light reflected by the FBG 132a changes. Therefore, the white light is incident on the FBG sensor 131 and the wavelength ⁇ of the reflected light is detected by the spectroscope, whereby the temperature at the position of the FBG 132a can be obtained. That is, the temperature detection point P is a position where the FBG 132a is provided.
- a plurality of FBGs 132a can be provided for one optical fiber, and the interval between them can be about 10 mm.
- the FBG sensor 131 is extremely fine, and may be broken if the FBG sensor 131 alone is inserted into the insertion hole 14h of the copper plate 14A. Therefore, in the present embodiment, the FBG sensor 131 is protected by the protective tube 135 to prevent the FBG sensor 131 from being damaged.
- the protective tube 135 is a cylindrical member that can be deformed in the radial direction, and protects the FBG sensor 131 inserted into the cylinder.
- the protective tube 135 is in contact with the inner surface of the insertion hole 14h in the insertion hole 14h. Therefore, the protective tube 135 is preferably made of a material that is different from the copper plate 14A and has a good sliding property so that the sensor portion 130 can be easily inserted together with the support member 110 into the insertion hole 14h.
- the protective tube 135 may be formed from a resin such as polyimide.
- the sensor unit 130 is configured by inserting the FBG sensor 131 into the protective tube 135.
- the sensor unit 130 differs in measurement accuracy and responsiveness of the FBG sensor 131 depending on the relationship between the outer diameter of the FBG sensor 131 and the inner diameter of the protective tube 135. Therefore, as a result of examining the relationship between the outer diameter of the FBG sensor 131 and the inner diameter of the hole into which the FBG sensor 131 is inserted, it has been found that the output responsiveness of the FBG sensor 131 decreases as the inner diameter of the hole into which the FBG sensor 131 is inserted increases. did. FIG.
- FIG. 8 shows a simulation result of the output responsiveness of the FBG sensor 131 with respect to the temperature change of the pore, assuming a model in which the FBG sensor 131 is inserted into the pore formed in the copper block.
- the temperature increase of the FBG sensor arranged at the center of the pore when the temperature of the inner surface of the pore of the copper block was raised stepwise from 150 ° C. to 155 ° C. was calculated.
- the FBG sensor 131 was assumed to be quartz having an outer diameter of 0.125 mm.
- the space between the pores and the FBG sensor 131 was filled with air, and the inner surface of the pores was kept at a uniform temperature. Under such conditions, when the inner diameter of the pore is changed to 0.2 mm, 0.5 mm, 1.0 mm, and 3.0 mm, the time change of the temperature estimated to be detected by the FBG sensor 131 is shown in FIG. It became like this.
- the temperature of the inner surface of the pore can be detected in a shorter time as the inner diameter of the pore is smaller.
- a predetermined response within a predetermined time is required. For example, in order to ensure a response of 95% or more within 5 seconds, the inner diameter of the pores needs to be 0.5 mm or less from FIG.
- the FBG sensor 131 when the FBG sensor 131 is loosely provided with respect to the pores, the FBG sensor 131 can move in the radial direction of the pores.
- the FBG sensor 131 may be in the center of the pore or in contact with the inner surface of the pore.
- the FBG sensor 131 becomes more responsive as it gets closer to the inner surface from the center of the pore, and does not depend on the inner diameter of the pore, and when the FBG sensor 131 is in contact with the inner surface of the pore, the response is sufficiently faster than 1 second. May show. That is, the larger the inner diameter of the pore, the greater the difference in response between when the FBG sensor 131 is at the center of the hole and when it contacts the inner surface of the hole, and the variation in response time of the FBG sensor 131 also increases.
- the response time variation due to the position variation in the radial direction of the FBG sensor 131 is 0 to 0.92 seconds when the pore inner diameter is 0.5 mm, whereas the pore inner diameter is 3.0 mm. In this case, it is 0 to 3.18 seconds.
- the variation in response time increases, the reliability of the measured temperature of the FBG sensor 131 is impaired.
- the FBG sensor 131 when there is a clearance between the FBG sensor 131 and the protective tube 135 and also between the protective tube 135 and the copper plate hole 14h and contact / non-contact is free, the FBG sensor 131
- the response of FIG. 8 overlaps the responses of FIG. 8, resulting in a larger response delay than the result shown in FIG.
- the positions of the protective tube 135 and the FBG sensor 131 in the radial direction with respect to the insertion hole 14h are taken into account, the variability in response is further increased, and the measurement reliability is further reduced.
- the sensor unit 130 is configured by loosely inserting the FBG sensor 131 into a protective tube 135 having an inner diameter of 0.5 mm or less. Thereby, the FBG sensor 131 can maintain a predetermined responsiveness within a predetermined time without being affected by the elongation strain of the protective tube 135.
- the protection tube 135 and the FBG sensor 131 need only be fixed at at least one place, and the protection tube 135 and the FBG sensor 131 are apart from each other at the places other than the fixing portion as shown in FIG. It is preferable to provide the fixing portion between the protective tube 135 and the FBG sensor 131 on the opening side of the insertion hole 14 h with respect to all the temperature detection points P of the FBG sensor 131. As a result, all temperature detection points P of the FBG sensor 131 can be prevented from being affected by the elongation strain of the protective tube 135.
- the protective tube 135 and the FBG sensor 131 are fixed at the end located on the opening side of the insertion hole 14h when inserted into the insertion hole 14h, and the protective tube 135 and the FBG sensor 131 are fixed at other portions. You may make it not.
- the temperature detection unit 100 made up of each member described above has a large diameter part 112 of the support member 110, a small diameter part 114 other than the temperature detection point P, and a temperature.
- the sensor unit 130 is fixed to the support member 110, and the temperature detection point P of the sensor unit 130 is fixed to a predetermined position.
- Yes. 9 to 11 are sectional views of the temperature detection unit 100 in the longitudinal direction.
- FIG. 9 is a cross-sectional view taken along the line DD in FIG. 10 is a cross-sectional view taken along the line EE of FIG. 11 is a cross-sectional view taken along the line Es-Es in FIG. 6.
- the left figure shows a state before insertion into the insertion hole 14h
- the right figure shows a state after insertion into the insertion hole 14h.
- the sensor unit 130 is located in the internal space of the groove 111 of the support member 110 as shown in FIG. Since the large-diameter portion 112 is a portion facing the inner surface of the insertion hole 14h when inserted into the insertion hole 14h, the tension member 120 is not provided on the outer periphery of the large-diameter portion 112. At this time, since the sensor part 130 is located in the internal space of the groove
- the small diameter portion 114 alternately arranged with the large diameter portion 112 in the longitudinal direction of the support member 110 includes a small diameter portion where the temperature detection point P is located and a small diameter portion where a portion other than the temperature detection point P is located, Each configuration is different. Between adjacent temperature detection points P, it is preferable to provide a small diameter portion where a portion other than at least one temperature detection point P is located. As will be described later, the configuration of the small diameter portion where the temperature detection point P is located and the small diameter portion where the portion other than the temperature detection point P is located is different from each other, so that the sensor portion 130 is supported by the tension member 120. This is for fixing to 110. For example, in FIG.
- the small diameter part that is, the EE cutting line adjacent to the small diameter part where the temperature detection point P is located across the large diameter part 112).
- a portion other than the temperature detection point P is located in the small diameter portion).
- the vicinity of the distal end portion of the protective tube 135 is preferably a large diameter portion 112.
- the sensor unit 130 is a tension member at a position other than the temperature detection point P of the sensor unit 130 in the small diameter portion 114 of the support member 110 provided with the tension member 120. It is located in a space inside the installation member 120 and the groove 111. At this time, the sensor unit 130 is provided so as not to contact the support member 110 but to be in contact with the inner side of the extending portion 122 of the extending member 120 so as to be separated as much as possible. Although the reason for this will be described later, this makes the sensor unit 130 less susceptible to the influence of heat from the support member 110, so that the temperature measurement accuracy can be improved, and the tension member 120 moves the outside of the groove 111. By being regulated so as not to come out, the support member 110 can be fixed.
- the sensor unit 130 is along the groove 111 in the longitudinal direction, and is centered on the width center of the groove 111 after being inserted into the insertion hole 14h as described later. Therefore, even when inserting the temperature detection part 100 in the deep (for example, 400 mm) insertion hole 14h, the attachment direction (circumferential direction of an insertion hole) of the sensor part 130 can be determined accurately.
- the protective tube 135 Prior to being inserted into the insertion hole 14h of the copper plate 14A, the protective tube 135 is provided so as to be in contact with the outside of the tension portion 122 of the tension member 120, as shown on the left side of FIG.
- the sensor unit 130 is provided substantially straight without bending in the longitudinal direction. Therefore, as shown in FIG. 6, the sensor unit 130 is installed by alternately passing the outside and the inside of the extending member 120 at the temperature detection point P and the other portions, so that a predetermined longitudinal direction is obtained. It fixes so that it may be knitted in the tension member 120 provided in the position.
- the sensor portion 130 is provided at a position other than the temperature detection point P in the small-diameter portion 114 so as to be in contact with the inside of the extending portion 122 of the extending member 120. It is.
- the protective tube 135 maintains a substantially circular shape.
- the maximum length of the temperature detection unit 100 in the radial direction that is, the length from the outer periphery of the protective tube 135 to the outer periphery of the large-diameter portion 112 of the support member 110 is slightly larger than the inner diameter of the insertion hole 14h. It is set to be.
- the protective tube 135 is pressed against the inner surface of the insertion hole 14h by the extending portion 122, as shown on the right side of FIG. It deforms in the radial direction and becomes an elliptical shape. In this way, by pressing the temperature detection point P against the inner surface of the insertion hole 14h and making contact therewith, the contact area between the inner surface of the insertion hole 14h and the outer side of the extending portion 122 and the outer peripheral surface of the protective tube 135 increases. It is possible to suppress the temperature detection point from moving in the insertion hole 14h.
- the possibility that the protective tube 135 is positioned near the point M1 where the distance between the insertion hole 14h and the extending portion 122 is maximized increases, and the installation position of the protective tube 135 (the circumferential position of the inner surface of the insertion hole 14h) is stable. To do. Therefore, the temperature detection part P can be reliably fixed at a predetermined position, and the measurement accuracy can be increased. Further, like the portions other than the temperature detection point P, the sensor unit 130 is separated from the support member 110 by the groove 111, so that it is less susceptible to the heat from the support member 110, and the temperature measurement accuracy is improved. it can. Further, since the FBG sensor 131 is loosely provided on the protective tube 135, the FBG sensor 131 is not affected by the elongation strain of the protective tube 135, and the temperature measurement accuracy can be improved.
- the length (hereinafter referred to as “sensor portion width”) ds from the opening of the groove 111 of the support member 110 to the opposing outer periphery is the width of the sensor portion 130 in the large diameter portion 112, the thickness of the tension member 120, and protection. It is determined according to the outer diameter of the tube 135 and the inner diameter of the insertion hole 14h.
- the temperature detection unit 100 winds a thread-like tension member 120 having a diameter of 0.05 mm around a support member 110 having a diameter of 4 mm, and a diameter of 0.125 mm around a protective tube 135 having an inner diameter of 0.5 mm and a thickness of 0.04 mm.
- the sensor unit 130 formed through the FBG sensor 131 may be fixed.
- the inner diameter of the insertion hole 14h of the copper plate 14A into which the temperature detection unit 100 is inserted can be set to a size in which the outer diameter of the support member 110 has a clearance of about 0.1 mm.
- the position in the thickness direction (Y direction in FIG. 4) of the copper plate 14A with which the protective tube 135 is in contact is determined by the installation accuracy in the circumferential direction of the support member 110.
- the allowable range of positional deviation in the thickness direction of the copper plate 14A needs to be within 0.25 mm in order to make the measurement error within 5 ° C.
- this is converted into a circumferential displacement, it is necessary to suppress it to about 0.73 mm to 0.83 mm.
- the position in the thickness direction of the protective tube 135 may be defined with an accuracy of about 0.2 to 0.3 mm by using a pin or the like on the uppermost surface of the copper plate 14A, and the circumferential position may be determined.
- the measurement error of the FBG sensor 131 can be within a predetermined range by setting the crushing allowance of the diameter of the protective tube 135 to 0.2 mm, for example.
- the FBG sensor 131 is not sandwiched and fixed by the protective tube 135, and the FBG sensor 131 is protected while maintaining a loose state with respect to the protective tube 135.
- the tube 135 can be reliably brought into contact with the inner surface of the insertion hole 14h with good positional accuracy.
- the crushing margin of the protective tube 135, and thus the inner diameter of the protective tube 135, is determined by the fitting tolerance between the insertion hole 14h and the support member 110 and the optical fiber diameter.
- the amount of crushing varies depending on the difference (gap deviation) between the maximum gap and the minimum gap after fitting. For this reason, in order to bring the protective tube 135 into contact with the insertion hole 14h stably, the crushing amount needs to be equal to or larger than the gap deviation.
- the gap deviation is reduced when the fitting tolerance is made high, and the crushing margin can be reduced.
- the rod and the insertion hole 14h are manufactured with a tolerance of 0.048 mm or less. Although it is necessary, if the tolerance is reduced, the processing cost of the hole and the support member increases. If the tolerance of the insertion hole and the rod is 0.048 mm, the gap deviation is about 0.1 mm, and the crushing margin needs to be larger than 0.1 mm.
- the protective tube 135 needs to have an inner diameter larger than the sum of the outer diameter of the FBG sensor 131 and the gap deviation.
- the outer diameter of the optical fiber for installing the FBG sensor 131 is 0.05 mm to 0.15 mm.
- the inner diameter of the protective tube 135 is 0.15 mm (when the optical fiber is 0.05 mm) to 0.25 mm (optical fiber 0). More than 15 mm) is necessary.
- the upper limit of the inner diameter of the protective tube 135 is 0.5 mm, and therefore the inner diameter of the protective tube 135 needs to be not less than 0.15 mm and not more than 0.5 mm. .
- the FBG sensor 131 can adapt to the copper plate temperature with high response. Further, as shown in FIG. 8, the FBG sensor 131 can react to the copper plate temperature with sufficient responsiveness by setting the inner diameter of the protective tube 135 to 0.5 mm or less. Therefore, the temperature detection unit 100 according to the present embodiment can detect the copper plate temperature with high response using the FBG sensor 131.
- the temperature detection unit 100 is installed in the insertion hole 14h of the copper plate 14A so that the sensor unit 130 faces the molten steel surface side. As a result, the temperature of the molten steel surface can be estimated more reliably.
- the configuration of the continuous casting mold 10 according to the first embodiment of the present invention has been described above.
- pores are formed from the upper surface, the lower surface, or the side surface of the copper plate constituting the mold 10, and the temperature detection unit 100 is inserted.
- the temperature detection unit 100 fixes a sensor unit 130 formed by inserting an FBG sensor 131 into a protective tube 135 having an inner diameter of 0.5 mm or less to a support member 110 such as a copper rod via a tension member 120. Is formed.
- the sensor unit 130 is less affected by the heat of the support member 110 and can measure temperature with high accuracy. It becomes.
- the sensor unit 130 since the sensor unit 130 is inserted into and removed from the insertion hole of the copper plate of the continuous casting mold 10 together with the support member 110, the sensor unit 130 can be easily inserted and removed, and the sensor unit 130 can be used repeatedly.
- the sensor unit 130 is sandwiched between the outer surface of the extending portion 122 and the inner surface of the insertion hole 14h, thereby suppressing the temperature detection point of the sensor unit 130 from moving through the insertion hole.
- the temperature can be measured with high accuracy at a desired position.
- the continuous casting mold 10 according to this embodiment has the same mold body as shown in FIGS. 1 to 3 as compared with the first embodiment, but the temperature at which the mold is inserted into the insertion hole of the copper plate of the mold 10.
- the detection unit is different in that it includes two FBG sensors.
- description of the mold body having the same configuration as that of the first embodiment will be omitted, and the configuration of the temperature detection unit inserted into the insertion hole of the copper plate of the mold 10 will be described in detail.
- FIG. 12 is a schematic cross-sectional view showing the state of the temperature detection point of the temperature detection unit 200 according to the present embodiment installed in the insertion hole 14h of the copper plate 14A of the continuous casting mold 10.
- the molten steel surface 14e of the copper plate 14A is located on the left side of the paper
- the cooling surface 14d of the copper plate 14A is located on the right side of the paper.
- FIGS. 12 to 16 some members constituting the temperature detection unit 200 are exaggerated for the sake of explanation.
- the temperature detection unit 200 inserted into the insertion hole 14h of the short-side copper plate 14A will be described.
- the temperature detection unit 200 is similar to the insertion hole of another copper plate of the mold 10. Installed.
- the temperature detection unit 200 includes a support member 210, a tension member 120, a first sensor unit 130A, and a second sensor unit 130B.
- the first sensor unit 130A and the second sensor unit 130B are configured by inserting FBG sensors 131A and 131B, which detect the temperature of the copper plate 14A, into hollow protective tubes 135A and 135B, respectively.
- the first sensor unit 130A and the second sensor unit 130B can have the same configuration as the sensor unit 130 according to the first embodiment.
- the support member 210 that supports the first sensor unit 130A and the second sensor unit 130B is formed with two grooves 211 and 213 along the longitudinal direction.
- the two grooves 211 and 213 are formed on the same diameter.
- the opening of the first groove 211 corresponding to the first sensor portion 130A faces the molten steel surface side
- the second sensor portion 130B corresponds to the second groove. It is installed in the insertion hole 14h of the copper plate 14A with the opening of the groove 213 facing the cooling surface.
- the temperature distribution in the thickness direction of the copper plate 14A that is, the heat flow rate in the copper plate can be measured from the temperatures measured by the first sensor unit 130A and the second sensor unit 130B.
- the temperature of the molten steel surface can be estimated from two points in the copper plate, it is also possible to obtain an accurate temperature of the molten steel surface.
- a tension member 120 having heat resistance is provided on the outer peripheral surface of the support member 210. Similar to the first embodiment, the tension member 120 is, for example, a thread-like or film-like member, and is provided in a state of being tensioned to the opening portions of the grooves 211 and 213.
- a portion of the extending member 120 that is extended to the opening portion of the first groove 211 is a first extending portion 122
- a portion that is extended to the opening portion of the second groove 213 is a second extending portion. This is referred to as part 124.
- the first sensor unit 130A and the second sensor unit 130B are provided outside the stretched portion.
- the first sensor part 130A and the second sensor part 130B are pressed against the extension part by the inner surface of the insertion hole 14h, but the extension part hardly bends by this pressing force, Maintain tension. Therefore, the protective tubes 135A and 135B of the first sensor unit 130A and the second sensor unit 130B are protected by the inner surface of the insertion hole 14h, the outer side of the first extending part 122, and the outer side of the second extending part 124. , 135B are pushed toward the center and deformed in the radial direction.
- the temperature detection points of the first sensor part 130A and the second sensor part 130B are suppressed from moving in the insertion hole 14h, and the insertion hole 14h, the first extension part 122, and the second extension part 124 Each position is fixed at the maximum distance. Therefore, when the support member 210 is inserted so that the position where the distance is maximum matches the point M1 that is the maximum temperature position of the inner surface of the insertion hole 14h, the first sensor portion 130A is fixed at the position M1 and the second sensor Part 130B is fixed at the M2 point position.
- the point M1 is the most upstream position in the heat flow direction, that is, the highest temperature position, as in the first embodiment.
- the M2 point in the inner surface of the insertion hole 14h is the most downstream position in the heat flow direction, that is, the lowest temperature position.
- the temperature detection unit 200 includes a first tension member in which the first sensor unit 130A and the second sensor unit 130B are stretched in the grooves 211 and 213 of the support member 210. It is supported by the support member 210 via the installation part 122 and the second extension part 124. That is, the first sensor unit 130 ⁇ / b> A and the second sensor unit 130 ⁇ / b> B are provided in a state where they are not in contact with the support member 210 and are separated from the support member 210. Therefore, the FBG sensors 131A and 131B of the first sensor unit 130A and the second sensor unit 130B are not easily affected by the heat of the support member 210, and can detect the temperature with high accuracy.
- the temperature detection unit 200 of the continuous casting mold 10 has the above-described features (a) to (c), and the temperature of the copper plate can be set with high accuracy. It can be detected and can be easily attached to and detached from the copper plate. Furthermore, since the temperature detection unit 200 according to the present embodiment can measure the temperature at two points in the radial direction of the support member, the temperature distribution in the thickness direction of the copper plate 14A, that is, the heat flow rate in the copper plate is measured. Is possible. Moreover, since the temperature of the molten steel surface can be estimated from two points in the copper plate, it is also possible to obtain an accurate temperature of the molten steel surface.
- FIG. 13 is a partially enlarged view of the support member 210.
- the upper diagram shows a state seen from the right side of FIG. 12, the center diagram shows the state seen from the upper side of FIG. 12, and the lower diagram shows the figure. 12 shows a state viewed from the left side of the drawing.
- 14 to 16 are cross-sectional views of the temperature detection unit 200 in the longitudinal direction. 14 is a cross-sectional view taken along the line DD in FIG. 15 is a cross-sectional view taken along the line EE in FIG.
- FIG. 16 is a cross-sectional view taken along the line Es-Es in FIG. 13.
- FIG. 13 shows a state before the support member 210 is inserted into the insertion hole 14h, and the state of the Es-Es cutting line in the central view of FIG. 13 corresponds to the left diagram of FIG.
- the support member 210 is a member that supports the sensor unit 130, and each sensor unit 130A, such that the longitudinal direction thereof corresponds to the longitudinal direction of the first sensor unit 130A and the second sensor unit 130B. 130B is provided.
- Each of the sensor units 130 ⁇ / b> A and 130 ⁇ / b> B can have one or more temperature detection points P in the longitudinal direction of the support member 210.
- the support member 210 also includes a large diameter portion 212 and a small diameter portion 214 as shown in FIG.
- the large diameter portion 212 prevents the support member 210 from rattling when inserted into the insertion hole 14h.
- the small diameter portion 214 has an outer diameter smaller than that of the large diameter portion 212.
- the small diameter portion 214 is a portion where the tension member 120 is provided. For example, as shown in FIG. 12, the tension member 120 is wound around the circumference.
- the small-diameter portion 214 is formed in order to escape the thickness so that the tension member 120 does not contact the inner surface of the insertion hole 14h when the temperature detection unit 200 is installed in the insertion hole 14h of the copper plate 14A.
- the support member 210 is formed with such large-diameter portions 212 and small-diameter portions 214 alternately.
- the support member 210 is formed with two grooves 211 and 213 along the longitudinal direction.
- the support member 210 is made of a metal member, since it has a clearance with the insertion hole 14h of the mold 10, it does not necessarily have the same temperature as the inner surface of the insertion hole 14h. Further, if the sensor units 130A and 130B are in contact with the support member 210, the FBG sensors 131A and 131B are also affected by the temperature of the support member 210, and the measurement accuracy is lowered.
- the grooves 211 and 213 are formed in the support member 210, and the sensor portions 130A and 130B are fixed to the support member 210 along the grooves 211 and 213 by using the tension member 120.
- the support member 210 can be separated. Thereby, the temperature influence which sensor part 130A, 130B receives from the supporting member 210 can be made small.
- the grooves 211 and 213 of the support member 210 have a substantially square cross-sectional space as shown in FIG. 12, but the present invention is not limited to this example, and the grooves 211 and 213
- the cross-sectional shape of the space may be, for example, a triangular shape or a semicircular shape. Further, even in the case of a substantially square cross-sectional shape as shown in FIG. 12, the grooves 211 and 213 may be shallower.
- the temperature detection unit 200 such a support member 210 is provided with two sensor units 130A and 130B on the same diameter. Since the sensor units 130A and 130B can be formed in the same manner as the sensor unit 130 according to the first embodiment, detailed description thereof is omitted here.
- the temperature detection unit 200 according to the present embodiment also has each member at each position of the large-diameter portion 212 of the support member 210, the small-diameter portion 214 other than the temperature detection point P, and the small-diameter portion 214 of the temperature detection point P.
- the sensor units 130A and 130B are fixed to the support member 210, and the temperature detection point P of the sensor units 130A and 130B is fixed at a predetermined position.
- the sensor portions 130A and 130B are located in the internal spaces of the grooves 211 and 213 of the support member 210 as shown in FIG. Since the large-diameter portion 212 is a portion facing the inner surface of the insertion hole 14h when inserted into the insertion hole 14h, the tension member 120 is not provided on the outer periphery of the large-diameter portion 212. At this time, since the sensor portions 130A and 130B are located in the internal space of the grooves 211 and 213, they can be provided without contacting the inner surface of the insertion hole 14h.
- the small diameter portions 214 alternately arranged with the large diameter portions 212 in the longitudinal direction of the support member 210 include a small diameter portion where the temperature detection point P is located and a small diameter portion where a portion other than the temperature detection point P is located, Each configuration is different. Between adjacent temperature detection points P, it is preferable to provide a small diameter portion where a portion other than at least one temperature detection point P is located. As will be described later, the sensor portions 130A and 130B are arranged via the tension member 120 by differentiating the configuration of the small diameter portion where the temperature detection point P is located and the small diameter portion where the portion other than the temperature detection point P is located. This is for fixing to the support member 210. In FIG. 13, similarly to FIG.
- the sensor units 130A and 130B do not contact the support member 210 but contact the inner sides of the first and second extension portions 122 and 124 of the extension member 120 so as to be separated as much as possible.
- the sensor units 130A and 130B are less susceptible to the influence of heat from the support member 210, so that the temperature measurement accuracy can be improved and the tension member 120 does not come out of the grooves 211 and 213. It can be fixed to the support member 210 by being regulated by.
- the sensor portions 130A and 130B are along the grooves 211 and 213 in the longitudinal direction, and are centered on the center of the width of the grooves 211 and 213 after being inserted into the insertion hole 14h, as will be described later. Thereby, even when inserting the temperature detection part 200 in the deep (for example, 400 mm) insertion hole 14h, the attachment direction (circumferential direction of an insertion hole) of sensor part 130A, 130B can be determined accurately.
- the sensor portions 130A and 130B are It is located outside the installation member 120.
- the protective tubes 135A and 135B are in contact with the outer sides of the first extension portion 122 and the second extension portion 124 of the extension member 120, as shown on the left side of FIG. Provided.
- the sensor units 130A and 130B are provided substantially straight without bending in the longitudinal direction. Therefore, as shown in FIG.
- the sensor units 130 ⁇ / b> A and 130 ⁇ / b> B are installed by passing the outside and the inside of the tension member 120 alternately at the temperature detection point P and other portions, thereby It is fixed so as to be knitted into the tension member 120 provided at a predetermined position.
- the protection tubes 135A and 135B each maintain a substantially circular shape.
- the maximum length of the temperature detection unit 200 in the radial direction that is, the length from the outer periphery of the protective tube 135A to the outer periphery of the protective tube 135B is set to be slightly larger than the inner diameter of the insertion hole 14h. ing.
- the protective tubes 135A and 135B are connected to the first extension portion 122 and the second extension portion as shown on the right side of FIG.
- the mounting portion 124 is pressed against the inner surface of the insertion hole 14h and is deformed in the radial direction to have an elliptical shape. In this way, the temperature detection point P is pressed against and brought into contact with the inner surface of the insertion hole 14h, so that the inner surface of the insertion hole 14h, the outer side of the first extension part 122 and the second extension part 124, and the protective tubes 135A and 135B.
- the contact area with the outer peripheral surface increases, and the temperature detection point can be suppressed from moving in the insertion hole 14h.
- the possibility that the protective tube 135A is located near the point M1 where the distance between the insertion hole 14h and the first extending portion 122 is maximized increases, and the installation position of the protective tube 135A (the circumferential position of the inner surface of the insertion hole 14h). Is stable.
- the possibility that the protective tube 135B is located near the point M2 where the distance between the insertion hole 14h and the second extending portion 124 is maximized increases, and the installation position of the protective tube 135B (the circumferential position of the inner surface of the insertion hole 14h) increases. ) Is stable.
- the temperature detection part P can be reliably fixed at a predetermined position, and the measurement accuracy can be increased.
- the sensor portions 130A and 130B are separated from the support member 210 by the grooves 211 and 213, so that they are not easily affected by the heat from the support member 210, and the temperature measurement accuracy is increased. Can be increased.
- the FBG sensors 131A and 131B are loosely provided on the protective tubes 135A and 135B, the FBG sensors 131A and 131B are not affected by the elongation strain of the protective tubes 135A and 135B, and the temperature measurement accuracy is improved. Can do.
- the length ds (hereinafter referred to as “sensor portion width”) ds from the opening of the groove 211 of the support member 210 to the opening of the opposite groove 213 is the width and tension of the sensor portions 130A and 130B in the large diameter portion 212. It is determined according to the thickness of the installation member 120, the outer diameter of the protective tubes 135A and 135B, and the inner diameter of the insertion hole 14h.
- the position of the copper plate 14A in contact with the protective tubes 135A and 135B in the thickness direction is determined by the installation accuracy in the circumferential direction of the support member 210. That is, an allowable range of positional deviation in the thickness direction of the copper plate 14A necessary to make the measurement error within the allowable range is calculated, and this is converted into a deviation in the circumferential direction, and the diameter of the protective tubes 135A and 135B is crushed. To decide.
- the measurement error of the FBG sensors 131A and 131B can be within a predetermined range, and the FBG sensors 131A and 131B are sandwiched between the protective tubes 135A and 135B, respectively, even when the temperature detection unit 200 is inserted into the insertion hole 14h.
- the FBG sensors 131A and 131B can be reliably brought into contact with the inner surface of the insertion hole 14h while maintaining a loose state with respect to the protective tubes 135A and 135B.
- the collapse allowance, and thus the inner diameter of the protective tubes 135A and 135B, is determined by the fitting tolerance between the insertion hole 14h and the support member 210 and the optical fiber diameter, as in the first embodiment.
- the amount of crushing varies depending on the difference (gap deviation) between the maximum gap and the minimum gap after fitting. For this reason, in order to make the protective tubes 135A and 135B come into contact with the insertion hole 14h stably, the crushing margin needs to be greater than or equal to this gap deviation. The gap deviation is reduced when the fitting tolerance is made high, and the crushing margin can be reduced.
- both the rod and the insertion hole 14h are manufactured with a tolerance of 0.048 mm or less. Although it is necessary, if the tolerance is reduced, the processing cost of the hole and the support member increases. If the tolerance of the insertion hole and the rod is 0.048 mm, the gap deviation is about 0.1 mm, and the crushing margin needs to be larger than 0.1 mm.
- the inner diameters of the protective tubes 135A and 135B are FBG sensors 131A and 13B. It must be larger than the sum of the outer diameter of 1B and the gap deviation.
- the outer diameter of the optical fiber for installing the FBG sensors 131A and 131B is 0.05 mm to 0.15 mm.
- the inner diameters of the protective tubes 135A and 135B are 0.15 mm (when the optical fiber is 0.05 mm) to 0.25 mm ( More than 0.15 mm optical fiber) is necessary. From the above points and the fact that the upper limit of the inner diameter of the protective tubes 135A and 135B is 0.5 mm, the inner diameter of the protective tubes 135A and 135B needs to be 0.15 mm or more and 0.5 mm or less.
- the FBG sensors 131A and 131B adapt to the copper plate temperature with high response. be able to. Further, as shown in FIG. 8, the FBG sensors 131A and 131B can react to the copper plate temperature with sufficient responsiveness by setting the inner diameters of the protective tubes 135A and 135B to 0.5 mm or less. Therefore, the temperature detection unit 200 according to this embodiment can also detect the copper plate temperature with high response using the FBG sensors 131A and 131B.
- the temperature detection unit 200 is installed in the insertion hole 14h of the copper plate 14A so that the first sensor unit 130A faces the molten steel surface side and the second sensor unit 130B faces the cooling surface side. Is done. As a result, the temperature of the molten steel surface can be estimated more reliably. Furthermore, since the temperature detection unit 200 according to the present embodiment can measure the temperature at two points in the radial direction of the support member, the temperature distribution in the thickness direction of the copper plate 14A, that is, the heat flow rate in the copper plate is measured. Is possible. Moreover, since the temperature of the molten steel surface can be estimated from two points in the copper plate, it is also possible to obtain an accurate temperature of the molten steel surface.
- the heat flow distribution can be obtained only with a macro heat flow rate that is an average of the entire copper plate surface. It is also possible to obtain the flow velocity distribution. This makes it possible to grasp the process status and process analysis in more detail.
- the configuration of the continuous casting mold 10 according to the second embodiment of the present invention has been described above.
- pores are formed from the upper surface, the lower surface, or the side surface of the copper plate constituting the mold 10 and the temperature detection unit 200 is inserted.
- the temperature detection unit 200 supports the first sensor unit 130A and the second sensor unit 131B formed by inserting the FBG sensors 131A and 131B into the protective tubes 135A and 135B having an inner diameter of 0.5 mm or less, respectively, such as a copper rod. It is formed by being fixed to the member 210 via the tension member 120.
- the sensor units 130A and 130B are kept away from the support member 210 by using the tension member 120, so that the sensor portions 130A and 130B are less affected by the heat of the support member 210 and are measured with high accuracy. Is possible. Further, since the sensor units 130A and 130B are inserted into and removed from the insertion hole of the copper plate of the continuous casting mold 10 together with the support member 210, the sensor units 130A and 130B can be easily inserted and removed, and the sensor units 130A and 130B are repeatedly used. Is possible.
- the sensor portions 130A and 130B are sandwiched between the outer surfaces of the first extension portion 122 and the second extension portion 124 and the inner surface of the insertion hole 14h.
- 130 ⁇ / b> B can be prevented from moving through the insertion hole, and the temperature can be measured with high accuracy at a desired position.
- the temperature detection unit 200 can measure the temperature at two points in the radial direction of the support member, the temperature distribution in the thickness direction of the copper plate 14A, that is, the heat flow rate in the copper plate is measured. Is possible.
- the temperature of the molten steel surface can be estimated from two points in the copper plate, it is also possible to obtain an accurate temperature of the molten steel surface.
- the temperature detection unit 100 was verified with respect to the temperature measured by the temperature detection unit 100 and its responsiveness.
- an experimental facility simulating the situation of the mold of a continuous casting machine as shown in FIG. 17 was used.
- a water tank 320 in which cooling water is stored is installed on one surface side of the copper plate 310 corresponding to the copper plate of the mold to cool one surface of the copper plate 310, and molten steel is applied to the opposite surface.
- a case 330 for placing the simulated heating block 340 was installed.
- the temperature detection unit 350 of the present invention including the FBG sensor was installed in the center in the thickness direction, and two thermocouples 362 and 364 were installed on both sides in the thickness direction of the temperature detection unit 350.
- the temperature detector 350 is disposed at a position in the thickness direction between the thermocouples 362 and 364.
- a polyimide tube having an inner diameter of 0.5 mm and a length of 400 mm was used as a protective tube, and an FBG sensor having a diameter of 0.125 mm was inserted into the polyimide tube to constitute a sensor unit.
- a cylindrical copper bar having an outer diameter of 4 mm and a length of 400 mm was used as the support member, and the sensor portion was fixed using a Kevlar (registered trademark) thread at the small diameter portion of the support member.
- the polyimide tube is separated from the copper rod, and the polyimide tube is placed on the inner surface of the insertion hole of the copper plate 350. The structure is pressed. At this time, the collapse allowance of the polyimide tube was about 0.2 mm.
- thermocouples 362 and 364 sheath thermocouples having a diameter of 0.5 mm were used. The response (63%) of this sheath thermocouple is 15 ms. Moreover, in order to measure the temperature of a heating block, the same thermocouple was installed in the case 330.
- a heating block 340 of about 300 ° C. was put into a case 330 installed on the copper plate 310 and brought into contact with one surface of the copper plate 310. And the output of the thermocouple inside the temperature detection part 350, the two thermocouples 362 and 364, and the case 330 was sampled every 0.2 second. In this embodiment, if the temperature rises by about 15 ° C. in 5 seconds after the copper plate 310 contacts the heating block 340, it is possible to determine whether the temperature detection unit 350 and the copper plate 310 are in good or bad contact. In addition, using this data, the temperature accuracy was also evaluated by comparison with a thermocouple.
- FIG. 18 shows the output results of the temperature detection unit 350, the two thermocouples 362 and 364, and the thermocouple inside the case 330 after the heating block is inserted.
- FBG sensor is the output of the temperature detector 350
- TC1 is the output of the thermocouple inside the case 330.
- TC2 is the output of the thermocouple 362
- TC3 is the output of the thermocouple 364, and the average of these is indicated by “(TC2 + TC3) / 2”.
- the temperature of TC1 rises rapidly. After TC1 rises, the output rises in the order of TC2, FBG sensor, and TC3 with a slight delay. In addition, the temperature difference between TC2 and TC3 is about 7.95 ° C. 5 seconds after the heating block 340 is charged (24 seconds), and the temperature distribution in the copper plate exceeds the accuracy of the thermocouple and FBG sensor. I understood.
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Abstract
Description
また、既存の鋳型に対して温度検出点を大幅に増やそうとすると、孔2dの数が増加するため、孔2dへ水が侵入する確率が増大し、バックプレート4の強度低下等による不具合(水の侵入や、銅板の熱歪変形増大)等の懸念もある。さらに、隣接する導水溝2cの間隔は、導水溝2c間に温度検出部6が設置される部分の方が、温度検出部6が設置されない部分よりも広くされる場合がある。したがって、既存の鋳型に対して導水溝2c間に新たに孔2dを形成して温度検出部6を設置すると、導水溝2cの間隔の平均値が大きくなり、冷却能率が低下する可能性がある。また、温度検出部6は、鋳型のメンテナンス時には、新しいものに交換される消耗品でもあり、容易にその数を増やすことができない場合もある。
測定が採用されている。FBGセンサは、光ファイバーセンサの1つであって、光ファイバーのコア部に屈折率の異なる層を複数重ねて格子を形成し、格子間隔と屈折率とにより特定される波長の光のみを反射あるいは透過させる構造を有する。FBGの温度による屈折率の変化と歪(すなわち、膨張収縮)により、FBGの格子周期が変化し、反射する波長が変化する。したがって、FBGセンサに白色光(広い波長範囲に滑らかに広がったスペクトルを持つ光)を入力し、その反射光の波長を分光器により検出することで、FBGの位置における温度を求めることができる。
[1-1.連続鋳造用鋳型の概略構成]
まず、図1~図3に基づいて、本発明の第1の実施形態に係る連続鋳造用鋳型の概略構成について説明する。なお、図1は、本実施形態に係る連続鋳造用鋳型10の概略構成を示す概略斜視図である。図2は、本実施形態に係る連続鋳造用鋳型10の短辺側の銅板14Aを示す概略斜視図である。図3は、本実施形態に係る連続鋳造用鋳型10の中仕切板16を示す概略斜視図である。図1において、X方向を鋳型厚み、Y方向を鋳型幅、Z方向を鋳型高さとする。
(1)概略構成
まず、図4を参照しながら、温度検出部100の概略構成を説明する。図4は、連続鋳造用鋳型10の銅板14Aの挿入孔14h内に設置された本実施形態に係る温度検出部100の、温度検出点の状態を示す概略断面図である。図4において、紙面左側に銅板14Aの溶鋼面14eが位置し、紙面右側に銅板14Aの冷却面14dが位置している。なお、図4、および、後述する図5、図8~図10においては、説明のため、温度検出部100を構成する各部材を一部誇張して記載している。また、以下の説明においては、一例として、短辺の銅板14Aの挿入孔14hに挿入された温度検出部100について説明するが、鋳型10の他の銅板の挿入孔にも温度検出部100は同様に設置される。
(a)FBGセンサ131を保護管135に挿入したセンサ部130を有する。保護管135の内径は、0.5mm以下が望ましい。
(b)センサ部130を、張設部材120を用いて、支持部材110から離隔した状態を維持しつつ固定し、連続鋳造用鋳型10の銅板の挿入孔に挿入して設置する。
(c)センサ部130の温度検出点において、保護管135を挿入孔14h内面と張設部材120とで挟持する。
(支持部材)
図5および図6に、本実施形態に係る支持部材110の構成を示す。図5は、本実施形態に係る支持部材110の概略を示す概略側面図である。図6は、図5に示す支持部材110の部分拡大図であって、上図は図4の紙面右側から見た状態を示し、下図は図4の紙面左側から見た状態を示す。
張設部材120は、支持部材110にセンサ部130を固定するとともに、図4に示すように、銅板14Aの挿入孔14hに挿入されたセンサ部130の保護管135を挿入孔14hの内周面に押し付ける部材である。張設部材120としては、弾性を有し、耐熱性のある糸状あるいはフィルム状の部材を用いるのがよく、例えば、ケブラー(登録商標)糸等を用いることができる。張設部材120は、支持部材110の小径部114に複数設けられ、溝111の開口部分に張設される。例えば糸状の張設部材120を用いる場合、図4に示すように、張設部材120は、溝111の開口部分で張るように、1~数回、支持部材110の小径部114の外周に巻回される。張設部材120のうち、開口部分に張設された部分が張設部分122である。
図7および図8に基づいて、センサ部130の構成について説明する。なお、図7は、FBGセンサ131の原理を説明する概略説明図である。図8は、保護管135の径を変化させたときのFBGセンサ131の応答性を示すグラフである。本実施形態に係るセンサ部130は、図4に示したように、銅板14Aの温度を検出するFBGセンサ131と、FBGセンサ131を保護する保護管135とからなる。
上述した各部材からなる温度検出部100は、長手方向において、支持部材110の大径部112、温度検出点P以外の小径部114、および温度検出点Pの小径部114の各位置で各部材の配置を異ならせることで、支持部材110へセンサ部130を固定し、さらに、センサ部130の温度検出点Pを所定の位置に固定させている。図9~図11に、温度検出部100の長手方向における断面図を示す。図9は、図6のD-D切断線における断面図である。図10は、図6のE-E切断線における断面図である。図11は、図6のEs-Es切断線における断面図であって、左図は挿入孔14hへの挿入前の状態を示し、右図は挿入孔14hへの挿入後の状態を示す。
まず、張設部材120が設けられない支持部材110の大径部112では、図9に示すように、センサ部130は、支持部材110の溝111の内部空間に位置する。大径部112は、挿入孔14hに挿入されたとき、挿入孔14hの内面と対向する部分であるため、大径部112の外周に張設部材120は設けられない。このとき、センサ部130は、溝111の内部空間に位置するため、挿入孔14hの内面に接触することなく設けることができる。
支持部材110の長手方向に大径部112と交互に配置される小径部114には、温度検出点Pが位置する小径部と、温度検出点P以外の部分が位置する小径部とがあり、それぞれで構成が異なる。隣接する温度検出点Pの間には、少なくとも1つの温度検出点P以
外の部分が位置する小径部が設けられるのがよい。後述するように、温度検出点Pが位置する小径部と、温度検出点P以外の部分が位置する小径部との構成を相違させることで、張設部材120を介してセンサ部130を支持部材110に固定させるためである。例えば図6では、温度検出点PがEs-Es切断線の位置にあるとき、大径部112を挟んで温度検出点Pが位置する小径部に隣接する小径部(すなわち、E-E切断線のある小径部)には、温度検出点P以外の部分が位置している。なお、保護管135の先端部近傍は、大径部112とするのがよい。
張設部材120が設けられている支持部材110の小径部114のうち、センサ部130の温度検出点P以外の位置では、図10に示すように、センサ部130は、張設部材120と溝111との内側にある空間に位置する。このとき、センサ部130は、支持部材110に接触せず、なるべく離隔されるように、張設部材120の張設部分122内側に接触するように設けられる。この理由は後述するが、これにより、センサ部130は、支持部材110からの熱の影響を受けにくくなるため、温度測定精度を高めることができ、かつ、張設部材120によって溝111の外部に出ないように規制されることで、支持部材110に固定させることができる。
張設部材120が設けられている支持部材110の小径部114のうち、センサ部130の温度検出点Pでは、図11に示すように、センサ部130は、張設部材120の外側に位置する。銅板14Aの挿入孔14hに挿入される前は、図11左側に示すように、保護管135は張設部材120の張設部分122の外側に接するように設けられる。ここで、センサ部130は、長手方向に撓むことなく略真っ直ぐに設けられている。したがって、図6に示すように、センサ部130は、温度検出点Pとそれ以外の部分とで、張設部材120の外部と内部とを交互に通して設置することで、長手方向の所定の位置に設けられた張設部材120に編み込まれるように固定される。上述のように、小径部114のうち温度検出点P以外の位置において、センサ部130が、張設部材120の張設部分122内側に接触するように設けられるのも、このような固定によるものである。
次に、図12~図16に基づいて、本発明の第2の実施形態に係る連続鋳造用鋳型10について説明する。本実施形態に係る連続鋳造用鋳型10は、第1の実施形態と比較して、図1~図3に示した鋳型本体は同一であるが、鋳型10の銅板の挿入孔に挿入される温度検出部が、2つのFBGセンサを備える点で相違する。以下では、第1の実施形態と同一構成である鋳型本体についての説明は省略し、鋳型10の銅板の挿入孔に挿入される温度検出部の構成について詳細に説明していく。
まず、図12を参照しながら、温度検出部200の概略構成を説明する。図12は、連続鋳造用鋳型10の銅板14Aの挿入孔14h内に設置された本実施形態に係る温度検出部200の、温度検出点の状態を示す概略断面図である。図12においても、図4と同様、紙面左側に銅板14Aの溶鋼面14eが位置し、紙面右側に銅板14Aの冷却面14dが位置している。なお、図12~図16においては、説明のため、温度検出部200を構成する各部材を一部誇張して記載している。また、以下の説明においては、一例として、短辺の銅板14Aの挿入孔14hに挿入された温度検出部200について説明するが、鋳型10の他の銅板の挿入孔にも温度検出部200は同様に設置される。
本実施形態に係る温度検出部200の構成について、図13~図16に基づき、より詳
細に説明していく。なお、図13は、支持部材210の部分拡大図であって、上図は図12の紙面右側から見た状態を示し、中央図は図12の紙面上側から見た状態を示し、下図は図12の紙面左側から見た状態を示す。図14~図16は、温度検出部200の長手方向における断面図である。図14は、図13のD-D切断線における断面図である。図15は、図13のE-E切断線における断面図である。図16は、図13のEs-Es切断線における断面図であって、左図は挿入孔14hへの挿入前の状態を示し、右図は挿入孔14hへの挿入後の状態を示す。なお、図13は、支持部材210を挿入孔14hに挿入する前の状態を示しており、図13の中央図のEs-Es切断線の状態は、図16左図に対応する。
まず、張設部材120が設けられない支持部材210の大径部212では、図14に示すように、センサ部130A、130Bは、支持部材210の溝211、213の内部空間に位置する。大径部212は、挿入孔14hに挿入されたとき、挿入孔14hの内面と対向する部分であるため、大径部212の外周に張設部材120は設けられない。このとき、センサ部130A、130Bは、溝211、213の内部空間に位置するため、挿入孔14hの内面に接触することなく設けることができる。
支持部材210の長手方向に大径部212と交互に配置される小径部214には、温度検出点Pが位置する小径部と、温度検出点P以外の部分が位置する小径部とがあり、それぞれで構成が異なる。隣接する温度検出点Pの間には、少なくとも1つの温度検出点P以外の部分が位置する小径部が設けられるのがよい。後述するように、温度検出点Pが位置する小径部と、温度検出点P以外の部分が位置する小径部との構成を相違させることで、張設部材120を介してセンサ部130A、130Bを支持部材210に固定させるためである。図13では、図6と同様、温度検出点PがEs-Es切断線の位置にあるとき、大径部212を挟んで温度検出点Pが位置する小径部に隣接する小径部(すなわち、E-E切断線のある小径部)には、温度検出点P以外の部分が位置している。なお、保護管135A、135Bの先端部近傍は、大径部212とするのがよい。
張設部材120が設けられている支持部材210の小径部214のうち、センサ部130A、130Bの温度検出点P以外の位置では、図15に示すように、センサ部130A、130Bは、張設部材120と溝211、213との内側にある空間に位置する。このとき、センサ部130A、130Bは、支持部材210に接触せず、なるべく離隔されるように、張設部材120の第1張設部122、第2張設部124の内側に接触するように設けられる。これにより、センサ部130A、130Bは、支持部材210からの熱の影響を受けにくくなるため、温度測定精度を高めることができ、かつ、張設部材120によって溝211、213の外部に出ないように規制されることで、支持部材210に固定させることができる。
張設部材120が設けられている支持部材210の小径部214のうち、センサ部130A、130Bの温度検出点Pでは、図16に示すように、センサ部130A、130Bは、張設部材120の外側に位置する。銅板14Aの挿入孔14hに挿入される前は、図16左側に示すように、保護管135A、135Bは張設部材120の第1張設部122、第2張設部124の外側に接するように設けられる。ここで、センサ部130A、130Bは、長手方向に撓むことなく略真っ直ぐに設けられている。したがって、図13に示すように、センサ部130A、130Bは、温度検出点Pとそれ以外の部分とで、張設部材120の外部と内部とを交互に通して設置することで、長手方向の所定の位置に設けられた張設部材120に編み込まれるように固定される。
1Bの外径と隙間偏差との和より大きいものである必要がある。FBGセンサ131A、131Bを施工するための光ファイバーの外径は0.05mm~0.15mmなどがある。上記のように、挿入孔14hや支持部材210の高額な加工費を抑制すること等を勘案すると、保護管135A、135Bの内径は、0.15mm(光ファイバー0.05mm時)~0.25mm(光ファイバー0.15mm時)以上が必要である。以上の点と、保護管135A、135Bの内径の上限が0.5mmであるということより、保護管135A、135Bの内径は0.15mm以上0.5mm以下である必要がある。
12A、12B、14A、14B 銅板
14h 挿入孔
16 中仕切板
100、200 温度検出部
110、210 支持部材
111、211、213 溝
112、212 大径部
114、214 小径部
120 張設部材
130(130A、130B) センサ部
131(131A、131B) FBGセンサ
135(135A、135B) 保護管
Claims (9)
- 連続鋳造用鋳型の鋳型本体と、
前記鋳型本体に形成された挿入孔に挿通され、鋳型内部の温度を検出する温度検出部と、
を備え、
前記温度検出部は、
径方向に変形可能な保護管に挿入されたFBG(ファイバー・ブラッグ・グレーティング)センサと、
長手方向に沿って溝が形成されており、前記FBGセンサを長手方向に沿って支持する支持部材と、
からなり、
温度検出点において、前記支持部材に前記溝の開口部分に張設された張設部材と、前記挿入孔の内面とにより、前記FBGセンサが挿入された前記保護管を挟み込む、連続鋳造用鋳型。 - 連続鋳造用鋳型の鋳型本体と、
前記鋳型本体に形成された挿入孔に挿通され、鋳型内部の温度を検出する温度検出部と、
を備え、
前記温度検出部は、
径方向に変形可能な保護管にそれぞれ挿入された2つのFBGセンサと、
径方向に対向する2つの溝が長手方向に沿って形成されており、前記2つのFBGセンサを長手方向に沿って支持する支持部材と、
からなり、
温度検出点において、前記支持部材に前記2つの溝それぞれの開口部分に張設された張設部材と、前記挿入孔の内面とにより、前記FBGセンサが挿入された前記保護管それぞれを挟み込む、連続鋳造用鋳型。 - 前記挿入孔において、前記FBGセンサの一方は前記鋳型本体の溶鋼面側に配置され、前記FBGセンサの他方は前記鋳型本体の冷却面側に配置される、請求項2に記載の連続鋳造用鋳型。
- 前記温度検出部は、前記鋳型本体の上方、下方または側方の少なくともいずれかから挿入される、請求項1~3のいずれか1項に記載の連続鋳造用鋳型。
- 前記FBGセンサは、前記挿入孔において、前記鋳型本体の厚さ方向の直径上に配置される、請求項1~4のいずれか1項に記載の連続鋳造用鋳型。
- 前記保護管は、内径が0.5mm以下であり、かつ、径方向に変形した場合においても、前記保護管の内径が前記FBGセンサの外径より大きくなるように構成される、請求項1~5のいずれか1項に記載の連続鋳造用鋳型。
- 前記支持部材は、長手方向に、前記張設部材が設けられる小径部と、前記小径部よりも大径の大径部とを備え、
前記FBGセンサの温度検出点が前記小径部に位置するように設けられる、請求項1~6のいずれか1項に記載の連続鋳造用鋳型。 - 前記FBGセンサは、
前記温度検出点において、前記張設部材の外側と前記挿入孔の内面との間に設けられ、
前記温度検出点を含まない前記小径部において、前記溝の内面と対向する前記張設部材の内側に設けられる、請求項7に記載の連続鋳造用鋳型。 - 前記張設部材は、耐熱繊維からなる、請求項1~8のいずれか1項に記載の連続鋳造用鋳型。
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CN201680028610.XA CN107614152B (zh) | 2015-04-08 | 2016-04-08 | 连续铸造用铸模 |
EP16776702.9A EP3281722B1 (en) | 2015-04-08 | 2016-04-08 | Mold for continuous casting |
KR1020177027484A KR101960628B1 (ko) | 2015-04-08 | 2016-04-08 | 연속 주조용 주형 |
BR112017020062-7A BR112017020062A2 (ja) | 2015-04-08 | 2016-04-08 | The mold for continuous casting |
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BE1025314B1 (fr) * | 2018-03-23 | 2019-01-17 | Ebds Engineering Sprl | Lingotière de coulée continue de métaux, système et procédé de détection de percée dans une installation de coulée continue de métaux |
DE102018213977A1 (de) | 2018-03-29 | 2019-10-02 | Sms Group Gmbh | Temperatursensoranordnung, Temperatursensorbauteil für eine metallurgische Anlage und Verfahren zum Herstellen eines solchen |
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US20180050387A1 (en) | 2018-02-22 |
CN107614152B (zh) | 2019-10-15 |
CA2981254A1 (en) | 2016-10-13 |
KR20170125373A (ko) | 2017-11-14 |
BR112017020062A2 (ja) | 2018-06-05 |
US10632526B2 (en) | 2020-04-28 |
EP3281722B1 (en) | 2019-08-28 |
JP6515329B2 (ja) | 2019-05-22 |
KR101960628B1 (ko) | 2019-03-20 |
CN107614152A (zh) | 2018-01-19 |
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