JP2023042980A - Surface profile detection device of object charged into blast furnace - Google Patents

Abstract

To provide a surface profile detection device of an object charged into a blast furnace, capable of detecting the surface profile of an entire surface of a charged object, by securing a scanning region over the entire face of the charged object, irrespective of an installation state of the detection device.SOLUTION: A detection device 100 detects the surface profile of a charged object by transmitting a detection wave M toward a surface of a charged object accumulated in a furnace through an opening 2 of a blast furnace 1 provided with the charged object, and by receiving the detection wave M reflected on the surface of the charged object. The device comprises a rotary disk 120 rotating in parallel with the opening 2, an angle variable reflection plate 140 and an angle-fixed reflection plate 138 fitted to the rotation plate 120, an antenna 135 transmitting the detection wave M to the angle-fixed reflection plate 138, and a casing 170 surrounding the detection device 100. At least a part of the angle variable reflection plate 140 is installed at a position entering the opening 2 of the blast furnace 1, and a part of a bottom face side of the casing 170 is provided projecting in the blast furnace 1.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a detector for detecting the surface profile of iron ore, coke, lime, etc. (hereinafter collectively referred to as "charge") in a blast furnace.

In a blast furnace, it is possible to reduce the fuel cost and extend the life of the furnace body by optimizing the deposition state of the burden material and stabilizing the gas flow in the furnace. In order to obtain an appropriate deposition state, the surface profile of these charged materials is accurately measured and detected in a short time, and a theoretical deposition state obtained in advance, that is, a "theoretical deposition profile" is obtained. It is necessary to replenish the charge.

In order to detect the surface profile of the charge of such a blast furnace, the present applicant also previously proposed a detection device shown in Patent Document 1. In the detection device described in Patent Document 1, a variable angle reflector and a fixed angle reflector are used, and the angle variable reflector and the angle fixed reflector are used. is attached to a rotating plate that rotates horizontally with the opening of the blast furnace, and by rotating the rotating plate, the surface profile of the burden accumulated in the blast furnace can be quickly detected linearly or planarly. are doing.

Japanese Patent No. 6857933

Since the above detection device is installed outside the furnace through the opening of the blast furnace, there is a height difference between the variable angle reflector and the opening of the blast furnace. FIG. 7 is a schematic diagram showing the variable angle reflector 140 of the detection device and the opening 2 of the blast furnace 1 extracted. M is swung in the right and left direction in the figure, propagates into the furnace through the opening 2, and scans the surface of the charge (not shown) deposited in the furnace. The propagation pattern of the detected wave M when the center point P of the reflecting surface 140a of the angle-variable reflecting plate 140 (hereinafter also referred to as the "measurement reference point") is located farther from the opening 2 is shown in ( A) and (B) of the figure show the propagation pattern of the detection wave M when it is located closer to the opening 2 . When the aperture 2 has the same aperture area, if the measurement reference point P is far from the aperture 2, the detection wave M by the aperture 2 is blocked as indicated by the oblique lines in FIG.

8A and 8B are schematic diagrams of the inside of the furnace viewed from the opening 2, and FIG. 8A corresponds to FIG. FIG. 7(B) corresponds to FIG. 7(B) and shows a case where the measurement reference point P is close to the opening 2, respectively. The charge 300 is deposited up to the inner wall 1a of the blast furnace 1, but when the measurement reference point P is far from the opening 2 (corresponding to FIG. 7(A)), the opening 2 looks small. ), the entire surface of the charge 300 cannot be seen, as indicated by the hatching in FIG. On the other hand, when the measurement reference point P is close to the opening 2 (corresponding to FIG. 7(B)), the entire surface of the charge 300 can be seen from the opening 2, and the scanning area is also the same as that of the charge. 300 across.

Even if the measurement reference point P is far from the opening 2, the scanning area can be widened by increasing the opening area of the opening 2, but the opening 2 must be enlarged. In addition, the high pressure inside the blast furnace requires a large-scale modification of the blast furnace, which is neither space nor economical.

Alternatively, it is conceivable to use an elevating device to bring the entire detection device closer to the opening 2 when measuring the surface profile of the charged material, but this would require a separate elevating device, increasing the equipment cost. The inside of the blast furnace is under high pressure, and when the detector moves up and down, a sealing material corresponding to the outer shape of the detector is required, increasing the risk of gas leakage.

As described above, it is assumed that the scanning area may be narrowed depending on the installation situation of the detection device. It is an object of the present invention to provide a surface profile detection device for a blast furnace insert, capable of detecting the surface profile of the entire surface of the insert.

As a result of careful consideration in order to solve the above problem, as shown in FIG. The present inventors have found that it is effective to use a gate valve of a swing type to shut off the detection device from the inside of the blast furnace from below the detection device, thereby leading to the present invention. That is, the present invention provides the following surface profile detection apparatus for blast furnace contents.

(1) In a blast furnace to which a charge such as iron ore, coke, lime, etc. is supplied, a detection wave is transmitted toward the surface of the charge accumulated in the furnace through an opening opening in the blast furnace. and receiving the detection wave reflected from the surface of the charge to detect the surface profile of the charge,
a rotating plate that is installed above the opening and rotates around the center of the opening;
rotating means for rotating the rotating plate;
a cylindrical rotating shaft having an opening at the center of the rotating plate, mounted concentrically with the opening, and containing an antenna therein;
Transmitting/receiving means installed above the end of the rotating shaft opposite to the opening and connected to the antenna for linearly transmitting and receiving the detected wave along the radial direction of the rotating plate and,
a variable angle reflector attached to the rotating plate and arranged in the space between the opening and having a reflecting surface with a variable angle;
It is attached to the rotating plate and disposed in the space between the opening and the angle of the reflecting surface is fixed to send the detection wave from the antenna to the reflecting surface of the angle-variable reflecting plate. and a fixed angle reflector of
a casing that surrounds the entire detection device and has an open bottom facing the opening of the blast furnace;
At least part of the variable-angle reflector is installed at a position to enter the opening of the blast furnace, and a part of the bottom side of the casing is installed so as to protrude from the opening of the blast furnace into the furnace. A surface profile detection device for a blast furnace charge, characterized by:
(2) In a blast furnace to which a charge such as iron ore, coke, or lime is supplied, a detection wave is transmitted toward the surface of the charge deposited in the furnace through an opening in the blast furnace. and receiving the detection wave reflected from the surface of the charge to detect the surface profile of the charge,
a rotating plate that is installed above the opening and rotates around the center of the opening;
rotating means for rotating the rotating plate;
an antenna attached to the rotating plate and disposed in the space between the opening;
Transmitting/receiving means connected to the antenna for linearly transmitting and receiving the detected wave along the radial direction of the rotating plate;
a variable angle reflector attached to the rotating plate and arranged in the space between the opening and having a reflecting surface with a variable angle;
A fixed angle for sending the detection wave from the antenna to the reflecting surface of the variable angle reflector, which is attached to the rotating plate so as to face the variable angle reflector, and has a fixed angle of the reflecting surface. a reflector;
a casing that surrounds the entire detection device and has an open bottom facing the opening of the blast furnace;
At least a part of the variable angle reflector is installed at a position to enter the opening of the blast furnace, and a part of the bottom side of the casing protrudes into the furnace from the opening of the blast furnace. A surface profile detection device for blast furnace contents, wherein a part of the bottom surface side of the blast furnace is installed so as to protrude from the opening of the blast furnace into the furnace.
(3) A swing type that rotates in the axial direction of the casing, covers the bottom surface of the charge when the surface profile of the charge is not measured, and hangs down on the side of the charge when the surface profile of the charge is measured. A surface profile detection device for a blast furnace charge according to the above (1) or (2), characterized by comprising a sluice valve.
(4) The surface profile detection device for blast furnace contents according to (3) above, wherein the gate valve is of a split type that covers the bottom face in a split manner.
(5) The above (3), wherein a packing for closing a gap between the gate valve and the casing is attached to the surface of the gate valve facing the bottom surface of the casing. (4) The apparatus for detecting the surface profile of the blast furnace contents.
(6) The surface profile of the blast furnace charge according to any one of (3) to (5) above, characterized in that a surface of the gate valve on the charge side is covered with a refractory material. detection device.
(7) a box surrounding a portion of the casing protruding into the furnace from the opening of the blast furnace and the gate valve; and at least the packing and the refractory provided in the box A surface profile detecting apparatus for a blast furnace inlet according to the above (5) or (6), characterized by comprising an inspection opening for performing maintenance on one side.

According to the apparatus for detecting the surface profile of blast furnace inserts of the present invention, the scanning area can be widened, and additional work or additional equipment such as enlarging the opening of the blast furnace or using a lifting device is not required. , can be applied to various existing blast furnaces, and can detect the surface profile of the entire surface of the charge.

FIG. 1 is a cross-sectional view showing a first embodiment of a surface profile detection apparatus for blast furnace contents according to the present invention. FIG. 2 is a cross-sectional view showing a state in which the detection device of the first embodiment is installed in the opening of the blast furnace. 3A and 3B are cross-sectional views showing an example of a gate valve, in which FIG. 3A shows a state in which the gate valve is closed, FIG. ) is a schematic diagram seen from the inside of the furnace in FIG. FIG. 4 is a schematic diagram showing a state in which a refractory material and a packing are attached to the gate valve. FIG. 5 is a schematic diagram showing a split gate valve. FIG. 6 is a cross-sectional view showing a second embodiment of the blast furnace charge surface profile detection device of the present invention. FIGS. 7(A) and 7(B) are diagrams for explaining the propagation pattern of the detected wave due to the height difference between the measurement reference point and the opening. 8A and 8B are schematic views of the interior of the blast furnace as viewed from the opening of the blast furnace, with FIG. 8A corresponding to FIG. 7A and FIG. 8B corresponding to FIG. 7B.

Hereinafter, the present invention will be described in detail with reference to the drawings.

[First embodiment]
FIG. 1 is a cross-sectional view showing a first embodiment of a surface profile detection device for blast furnace contents (hereinafter also referred to as a "detection device") of the present invention. The detailed structure and functions of the detection device 100 shown in FIG. 1 can be referred to the first embodiment of Patent Document 1.

As shown in FIG. 1, the detection device 100 includes a rotating plate 120 that rotates around a rotating shaft 110. As shown in FIG.

The rotating plate 120 is an annular disc with an open center. A central opening of the rotary plate 120 is indicated by reference numeral 121 .

Rotating shaft 110 is cylindrical, accommodates antenna 135 therein, and is attached concentrically with opening 121 of rotating plate 120 . The antenna 135 is connected to the transmitting/receiving means 130 of the detection wave M via the waveguide 133 . The waveguide 133 is configured such that the upper end portion of the connecting rod 114 on the transmitting/receiving means 130 side is separated so that the transmitting/receiving means 130 does not rotate. This separated portion is indicated by reference numeral 180, and the interval of the gap is set to be less than the wavelength of the detected wave M so that the detected wave M does not leak. Also, the waveguide 133 is aligned with the axis of the rotating shaft 110 . In order to improve the directivity of the detected wave M, the antenna 135 may be provided with a dielectric lens 136 made of fluorine resin or the like on the antenna surface. Further, the dielectric lens 136 can also correspond to a millimeter wave as the detection wave M. FIG. Furthermore, by using a parabolic antenna or a Cassegrain antenna as the antenna 135, the vertical dimension of the detection apparatus 100 as a whole can be reduced, and the dielectric lens 136 can be omitted.

A gear 112 is provided on the outer peripheral surface of the rotating shaft 110, and the gear 112 is meshed with a gear 155 of a motor 113 (rotating means). Therefore, by driving the motor 113, which is a rotating means, the rotating shaft 110 rotates as indicated by symbol Y in the figure, and accordingly the rotating plate 120 rotates in the same direction as the rotating shaft 110 in the blast furnace 1. It rotates horizontally with respect to the opening 2 .

In the space below the rotating plate 120 and between the opening 2 of the blast furnace 1, a fixed angle reflector 138 and a variable angle reflector 140 for transmitting and receiving the detection wave M into the furnace are arranged. is set.

The fixed-angle reflector 138 is a reflector whose reflecting surface has an inclination angle fixed at 45°, and includes a first fixed-angle reflector 138A, a second fixed-angle reflector 138B, and a third fixed-angle reflector. It consists of a plate 138C. The first fixed-angle reflector 138A faces the antenna surface of the antenna 135 (the dielectric lens 136 in the example shown) through the opening 121 of the rotating plate 120 . The second fixed angle reflector 138B faces the first fixed angle reflector 138A, and the third fixed angle reflector 138C faces the second fixed angle reflector 138B. Therefore, as indicated by the dashed line in the drawing, the detection wave M transmitted from the antenna 135 is reflected by the first fixed angle reflector 138A, sent to the second fixed angle reflector 138B, and is transmitted to the second fixed angle reflector 138B. After being reflected by the fixed angle reflector 138B, it is sent to the third fixed angle reflector 138C. Then, the light is reflected by the third fixed angle reflector 138</b>C and sent to the variable angle reflector 140 .

These first fixed-angle reflector 138A, second fixed-angle reflector 138B, and third fixed-angle reflector 138C are fixed members (not shown) hanging down from the rotating plate 120 toward the opening 2 of the blast furnace 1. ). Alternatively, a first fixed angle reflector 138A, a second fixed angle reflector 138B and a third A fixed angle reflector 138C can also be attached. The side wall 170 is a cylindrical body with an open bottom facing the opening 2 of the blast furnace 1, and constitutes a part of the casing.

As the detection wave M, it is preferable to use a microwave or a millimeter wave because the temperature inside the furnace is high and dust and water vapor are present. In particular, millimeter waves are preferable because they have shorter wavelengths and higher directivity than microwaves.

The angle-variable reflector 140 is a reflector whose inclination angle of the reflective surface 140a is variable in the direction indicated by symbol X in the figure. In this variable angle reflector 140, the first link 117a of the link mechanism 117 is fixed at the center of the surface (rear surface) opposite to the reflecting surface 140a, and the second link 117b is connected to the first link 117a. are doing. A connecting rod 114 is connected to the second link 117b and passes through the inside of the rotating shaft 110 through the opening 121 of the rotating shaft 110. A rack gear is attached to the end of the connecting rod 114 opposite to the second link 117b. 118 are formed.

The connecting rod 114 has an outer tube portion 114a having a waveguide 133 connecting the antenna 135 and the transmitting/receiving means 130 as an inner tube, and a rack gear 118 is formed on the outer peripheral surface of the outer tube portion 114a. A gear 119 of a motor 125 is meshed with the rack gear 118 , and when the motor 125 is driven, the gear 119 rotates and is converted into linear motion by the rack gear 118 . An encoder 126 is connected to the motor 125 to detect the amount of rotation of the motor 125 and the amount of rotation of the gear 119 .

Moreover, the connecting rod 114 has an intermediate portion 114 b extending toward the rotating plate 120 inside the rotating shaft 110 so as to avoid the antenna 135 . The end portion of the outer tube portion 114a on the rotating shaft 110 side is bent outward, and the intermediate portion 114b is connected to this bent portion.

Furthermore, the intermediate portion 114b has a lower end portion 114c that extends through the opening 121 of the rotating plate 120 to the opening 2 of the blast furnace 1 . This lower end portion 114 c is connected to the second link 117 b of the link mechanism 117 .

Rotation of the connecting rod 114 is converted into linear motion by the rack gear 118 through the gear 119, and the connecting rod 114 moves toward or away from the variable angle reflector 140 as indicated by symbol H in the figure. and move in a straight line.

Also, although not shown, the portion of the waveguide 133 on the antenna 135 side may be free from the rotating shaft 110 so that the waveguide 133 does not rotate even when the rotating shaft 110 rotates. Thus, there is also a method in which the waveguide 133 is not divided at the separation portion 180 .

Alternatively, an insertion hole having a diameter slightly larger than that of the waveguide 133 may be provided in the top plate portion of the rotating shaft 110 so that the antenna 135 does not rotate even when the rotating shaft 110 rotates.

Support shafts 141 , 141 project from both diametrical ends of the angle-variable reflector 140 , and the support shafts 141 , 141 are rotatably attached to support arm holding rods 145 .

When the connecting rod 114 moves toward the variable angle reflector 140 (downward in the drawing), the reflecting surface 140a of the variable angle reflector 140 is tilted to face the inner wall of the blast furnace 1 via the link mechanism 117. , when the connecting rod 114 moves to the opposite side of the variable angle reflector 140 (upward in the figure), the reflecting surface 140a of the variable angle reflector 140 is tilted to face the axis of the blast furnace 1 via the link mechanism 117. do. That is, by lowering and raising the connecting rod 114, the inclination of the reflecting surface 140a of the angle-variable reflecting plate 140 can be changed in the X direction in the figure. The center of the reflecting surface 140a of the angle-variable reflecting plate 140 is the "measurement reference point P" shown in FIGS. 7(A) and 7(B).

Accompanying this, the detection wave M sent from the third fixed angle reflector 138C of the fixed angle reflector 138 to the variable angle reflector 140 is swung in the horizontal direction in the drawing as indicated by symbol Z, and the rotating plate 120 It becomes a linear shape along the radial direction of , and is sent into the furnace.

The detection wave M is reflected by the surface of the charge (not shown) deposited in the furnace, and is received by the transmitting/receiving means 130 along the same path as when transmitted. Transmission and reception can be performed, for example, by the FM-CW system.

By transmitting and receiving this linear detection wave M while rotating the rotating plate 120 about the rotating shaft 110, the distance in the circular scanning area with respect to the surface of the charge deposited in the furnace Information is obtained, namely the surface profile of the charge.

The detection device 100 is installed in the opening 2 of the blast furnace 1 as indicated by arrow A in FIG. They are installed so that they all enter the opening 2. - 特許庁When installing the detection device 100 , for example, a flange 171 protruding from the outer peripheral surface of the side wall (casing) 170 is fixed along the periphery of the opening 2 of the blast furnace 1 . By installing in this manner, the center of the reflecting surface 140a of the angle-variable reflecting plate 140, that is, the measurement reference point P is positioned inside or very close to the opening 2, as shown in FIGS. As explained using (B), the scanning area is widened.

Further, since the side wall 170 remains as it is, by installing the variable angle reflector 140 so that part or all of it enters the opening 2 , a part of the bottom side of the side wall 170 is removed from the opening 2 . Protrudes into the furnace. In order to prevent high temperature and dust from entering the furnace, the bottom surface of the side wall 170 may be closed with a heat-resistant plate material (for example, a glass plate) that transmits the detection wave M. When the surface profile of the container is not being measured, ie not detected, it can also be covered with a gate valve 200, as shown in FIG.

3 shows only the opening 2 of the blast furnace 1, the bottom surface 170a of the side wall 170, and the gate valve 200 for the sake of simplicity. A swing valve can be used as the gate valve 200 . The gate valve 200 has a lid member 210 that covers the entire bottom surface 170a of the side wall 170, and a support member 211 that is continuous with one end of the lid member 210, and has an L-shaped cross section as a whole. The support member 211 is connected to a rotating shaft 220, and the gate valve 200 rotates about the rotating shaft 220 in the direction of the axis C of the side wall 170 as indicated by the arrow R. By operating the rotating shaft 220, as shown in FIG. As shown in FIG. (B), when measuring the surface profile of the charge, that is, when detecting, the cover member 210 of the gate valve 200 is rotated away from the axis C to expose the bottom surface 170a of the side wall 170. Let

A flange 171a of the side wall 170 on the side of the gate valve 200 is opened to secure a gap 172 for connecting the rotating shaft 220 to an external drive source. Then, it is surrounded by a cover body 173 so as to cover the rotating shaft 220 as well. Further, the opening 2 of the blast furnace 1 is also extended as indicated by reference numeral 2a so that the support member 211 of the gate valve 200 can rotate.

In addition, as shown in FIG. 4C, a box 175 that surrounds the portion of the side wall 170 protruding into the furnace from the opening 2 of the blast furnace 1 and the gate valve 200 and that is open inside the furnace. may be attached.

Furthermore, a packing 240 may be attached to a surface 210b of the lid member 210 of the gate valve 200 facing the bottom surface 170a of the side wall 170, and a packing 240 may be provided between the lid member 210 of the gate valve 200 and the bottom surface 170a of the side wall 170. Better sealing.

Further, as shown in FIG. 4C, inspection openings 176, 176 are opened in both side walls 175a, 175a supporting both ends of the rotating shaft 220 of the box 175, and the packing 240 and the refractory are opened. 230 can be observed and exchanged. Furthermore, the inspection port 176 is opened and closed by a cover 177, and is closed during measurement of the surface profile of the charged material and opened during replacement.

As shown in FIG. 4, a refractory 230 may be attached to the surface 210a of the lid member 210 facing the charged material, thereby further increasing the heat resistance of the gate valve 200. As shown in FIG.

Furthermore, the gate valve 200 can also be of a split type. As an example, FIG. 5 shows a split gate valve 200A that is split into two. A pair of split gate valves 200A are provided on both sides of the side wall 170, and the respective lid members 210a, 210a meet to cover the entire bottom surface 170a of the side wall 170. As shown in FIG. Note that the split gate valve 200A may be split into three or four.

Refractory material 230 and packing 240 as shown in FIG. 4 may also be attached to split gate valve 200A.

[Second embodiment]
FIG. 6 is a cross-sectional view showing a second embodiment of the detection device of the present invention. The detailed structure and functions of the detection device 100 shown in FIG. 6 can be referred to the third embodiment of Patent Document 1.

As shown in FIG. 6, the detection device 100 rotates around a rotating shaft 110 horizontally with respect to the opening 2 of the blast furnace 1 as indicated by the symbol Y. A transmission/reception means 130 for transmitting and receiving is mounted. An antenna 135 is connected to the transmitting/receiving means 130, and directly below the antenna 135, a fixed angle reflector 138 having a fixed inclination angle of a reflecting surface 138a is arranged. Further, the antenna 135 may be provided with a dielectric lens 136 on the antenna surface in order to improve the directivity of the detected wave M. FIG.

Although not shown, the transmitting/receiving means 130 may be placed on the inner tube 115 and a waveguide or coaxial cable may be inserted in the inner tube 115 and connected to the antenna 135 . Thereby, the transmitting/receiving means 130 can be protected from the high temperature of the blast furnace 1 .

The rotating shaft 110 has a double tube structure, and the end of the outer tube 111 on the side of the opening 2 is fixed to the rotating plate 120 . A gear 112 is provided on the outer peripheral surface of the outer tube 111 , and the gear 112 meshes with the gear 155 of the motor 113 . Therefore, by driving the motor 113, the rotary plate 120 fixed to the outer tube 111 rotates horizontally with respect to the opening 2 of the blast furnace 1, as indicated by symbol Y in the figure.

The inner tube 115 of the rotary shaft 110 has, via a link mechanism 117, an angle-variable reflector 140 whose inclination angle is variable in the direction indicated by symbol X in the drawing. installed. The variable-angle reflector 140 has a first link 117a of a link mechanism 117 fixed to the center of the surface opposite to the reflecting surface 140a. The tip of the inner tube 115 is connected to the 2-link 117b. A rack gear 118 is formed at the other end of the inner tube 115. A gear 119 of a motor (not shown) meshes with the rack gear 118. When the motor is driven, the gear 119 rotates and the rack gear 118 rotates. is converted to linear motion with Then, the inner tube 115 moves linearly to the side of the variable angle reflector 140 or to the opposite side, as indicated by symbol H in the drawing.

Support shafts 141 , 141 project from both diametrical ends of the angle-variable reflector 140 .

Then, when the inner pipe 115 moves toward the variable angle reflector 140 (downward in the figure), the reflecting surface 140a of the variable angle reflector 140 is tilted to face the inner wall of the blast furnace 1 via the link mechanism 117. , when the inner tube 115 moves to the opposite side of the variable angle reflector 140 (upward in the figure), the reflecting surface 140a of the variable angle reflector 140 is tilted to face the axis of the blast furnace 1 via the link mechanism 117. do. That is, by lowering and raising the inner tube 115, the inclination of the reflecting surface 140a of the angle-variable reflecting plate 140 can be changed in the X direction in the figure.

The fixed-angle reflector 138 and the variable-angle reflector 140 are arranged to face each other, and the detection wave M from the transmitting/receiving means 130 is reflected from the antenna 135 by the reflecting surface 138a of the fixed-angle reflector 138 to change the angle. After being sent to the reflecting surface 140a of the reflecting plate 140, it is sent from the reflecting surface 140a of the angle-variable reflecting plate 140 through the opening 2 of the blast furnace 1 into the furnace. At this time, by changing the inclination angle X of the reflecting surface 140a of the angle-variable reflecting plate 140, the transmission path of the detection wave M into the furnace is swung in the right and left direction in the figure, as shown by symbol Z. 120 becomes linear along the radial direction.

By transmitting and receiving this linear detection wave M while rotating the rotating plate 120 about the rotating shaft 110, the distance in the circular scanning area with respect to the surface of the charge deposited in the furnace Information is obtained, namely the surface profile of the charge.

In the present invention, as shown in FIG. 2 of the first embodiment, the variable angle reflector 140 is installed via the flange 171 so that part or all of the variable angle reflector 140 enters the opening 2 . This widens the scanning area.

Further, since a part of the bottom side of the side wall 170 protrudes into the furnace from the opening 2, the gate valve 200 and the split gate valve 200A shown in FIGS. can be attached.

1 blast furnace 2 opening 100 detector 110 rotating shaft 113 motor (rotating means)
114 connecting rod 117 link mechanism 120 rotating plate 130 transmitting/receiving means 135 antenna 138 fixed angle reflector 138A first fixed angle reflector 138B second fixed angle reflector 138C third fixed angle reflector 140 variable angle reflector 170 side wall (casing)
171, 171a Flange 175 Box 176 Inspection port 177 Cover 200 Gate valve 200A Split gate valve 210 Lid member 211 Support member 220 Rotating shaft 230 Refractory material 240 Packing 300 Charge M Detection wave

Claims (7)

In a blast furnace to which a charge such as iron ore, coke, or lime is supplied, a detection wave is transmitted toward the surface of the charge deposited in the furnace through an opening opened in the blast furnace, A detection device for receiving the detection wave reflected from a surface of a charge to detect a surface profile of the charge,
a rotating plate that is installed above the opening and rotates around the center of the opening;
rotating means for rotating the rotating plate;
a cylindrical rotating shaft having an opening at the center of the rotating plate, mounted concentrically with the opening, and containing an antenna therein;
Transmitting/receiving means installed above the end of the rotating shaft opposite to the opening and connected to the antenna for linearly transmitting and receiving the detected wave along the radial direction of the rotating plate and,
a variable angle reflector attached to the rotating plate and arranged in the space between the opening and having a reflecting surface with a variable angle;
It is attached to the rotating plate and disposed in the space between the opening and the angle of the reflecting surface is fixed to send the detection wave from the antenna to the reflecting surface of the angle-variable reflecting plate. and a fixed angle reflector of
a casing that surrounds the entire detection device and has an open bottom facing the opening of the blast furnace;
At least part of the variable-angle reflector is installed at a position to enter the opening of the blast furnace, and a part of the bottom side of the casing is installed so as to protrude from the opening of the blast furnace into the furnace. A surface profile detection device for a blast furnace charge, characterized by: In a blast furnace to which a charge such as iron ore, coke, or lime is supplied, a detection wave is transmitted toward the surface of the charge deposited in the furnace through an opening opened in the blast furnace, A detection device for receiving the detection wave reflected from a surface of a charge to detect a surface profile of the charge,
a rotating plate that is installed above the opening and rotates around the center of the opening;
rotating means for rotating the rotating plate;
an antenna attached to the rotating plate and disposed in the space between the opening;
Transmitting/receiving means connected to the antenna for linearly transmitting and receiving the detected wave along the radial direction of the rotating plate;
a variable angle reflector attached to the rotating plate and arranged in the space between the opening and having a reflecting surface with a variable angle;
A fixed angle for sending the detection wave from the antenna to the reflecting surface of the variable angle reflector, which is attached to the rotating plate so as to face the variable angle reflector, and has a fixed angle of the reflecting surface. a reflector;
a casing that surrounds the entire detection device and has an open bottom facing the opening of the blast furnace;
At least a part of the variable angle reflector is installed at a position to enter the opening of the blast furnace, and a part of the bottom side of the casing protrudes into the furnace from the opening of the blast furnace. A surface profile detection device for blast furnace contents, wherein a part of the bottom surface side of the blast furnace is installed so as to protrude from the opening of the blast furnace into the furnace. A swing-type gate valve that rotates in the axial direction of the casing, covers the bottom surface when the surface profile of the charge is not measured, and hangs down on the side of the charge when the surface profile of the charge is measured. 3. The surface profile detection device for blast furnace contents according to claim 1 or 2, characterized by comprising: 4. A surface profile detection device for a blast furnace charge according to claim 3, wherein said sluice valve is of a split type covering said bottom surface in a split manner. 5. The blast furnace according to claim 3, wherein a packing for closing a gap between the gate valve and the casing is attached to a surface of the gate valve facing the bottom surface of the casing. Surface profile detection device for inner packaging. The surface profile detecting device for blast furnace charge according to any one of claims 3 to 5, wherein a surface of the gate valve on the charge side is covered with a refractory material. A box surrounding the portion of the casing that protrudes into the furnace from the opening of the blast furnace and the gate valve, and maintenance of at least one of the packing and the refractory provided in the box. 7. A surface profile detection device for a blast furnace inlet according to claim 5 or 6, further comprising an inspection opening for performing the inspection.

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