JP2002275516A - Instrument and method for measuring distribution shape of charged materials - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an instrument for measuring a distribution shape of charged materials, by which the soundness of each part in an electronic circuit constituting a laser unit can easily be confirmed with a simple configuration even when it is installed or not installed in a blast furnace. SOLUTION: Since the laser unit is disposed at the outer part of the base end side of a sonde tube 2 to be installed so that the base end side is out of the blast furnace and the top end side positions in the blast furnace, an antenna 5 is internally provided at the top end part of the sonde tube 2, and the laser unit and the antenna 5 are interconnected through a guide tube 4, thereby positioning the laser unit at the outside of the blast furnace, the soundness of each part in the electronic circuit constituting the laser unit can be confirmed without providing a cooling means for protecting the laser unit, a lead wire leading signals or the like from heat in the sonde tube 2 and without leading out weak signals to the outside distant by several meters.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of an apparatus and a method for measuring the distribution of a charge distribution which measures the distribution of the charge inside a blast furnace in an ironworks.

[0002]

2. Description of the Related Art As is well known, in order to alternately form a raw material layer and a coke layer, raw materials and coke are charged alternately in a blast furnace. The surface shape, that is, the charge distribution shape, is extremely important because it has a great influence on the reduction of iron ore in the raw material. for that reason,
Conventionally, the distribution shape of the furnace interior contents of a blast furnace has been measured by various means described later.

[0003] Conventionally, there has been used a mechanical-type measuring apparatus for measuring a charge distribution shape called a sounding method. In this measuring device, a plurality of drums are driven, and a rope (some of which uses a chain) is paid out, so that the rope is hung down from a lance, and a weight suspended vertically at the tip of each rope is mounted. The arrival of the surface of the object is detected as a load change of the weight by a tension meter or limit switch, and the length of the rope at that time is determined to measure the distribution shape of the object. . However, this measuring device
There are drawbacks such as the rope being wrapped around the drum during winding and becoming entangled, the measurement of the distribution shape of the charged material takes a long time, and the maintenance of the measuring device is troublesome. For this reason, recently, a measurement apparatus for a charged object distribution shape having a configuration as described later in which a radar apparatus using a microwave is incorporated in a lance has been replaced with a new one.

[0004] As a measuring device for measuring the distribution shape of a charged substance by using a microwave, for example, Japanese Utility Model Publication No. 1-121616
Japanese Patent Application Laid-Open Publication No. H8 (Conventional Example 1) and Japanese Patent No. 2870346 (Conventional Example 2) are known. First, a measuring apparatus using a microwave according to Conventional Example 1 will be described with the same names and the same reference numerals described in the same gazette, with reference to FIG.

That is, the measuring apparatus using microwaves according to the prior art 1 is horizontally inserted into a blast furnace, and a reflector antenna 2 is provided inside a tip of a sound tube 1 and this reflector is provided. A microwave three-dimensional circuit device (corresponding to a radar unit) 3 is stored in a microwave three-dimensional circuit device storage case 5 provided inside the antenna 2 via a heat insulating material 4. A signal line communicates with the microwave three-dimensional circuit device housing case 5 from a microwave control panel 7 disposed outside the sound tube 1. The signal line is passed through a dust supply and cooling gas supply duct 8 outside the sound tube 1 and a signal line duct 6 inside the sound tube 1. The cooling water supply pipe 9 and the cooling water discharge pipe 10 are provided so as to protrude from the base end face of the sound pipe 1.

Therefore, when measuring the distribution shape of the charge by the measuring device according to the prior art 1, the probe tube 1 is moved horizontally in the furnace while irradiating microwaves toward the lower charge. To measure the distribution shape of the charged material. This measuring device requires a shorter measuring time than the mechanical measuring device, and moves the sound tube 1 horizontally at a speed of 10 m / min or more ( Because of this, there is a great advantage that the distribution shape of the charge can be measured with high efficiency.

Next, a first embodiment and a second embodiment of a measuring apparatus using a microwave according to Conventional Example 2 are shown in sectional views of a furnace top for measuring a charge profile by attaching a microwave probe to the top of a blast furnace. Referring to FIG. 10 of FIG. 10 and FIG. 11 of a microwave probe explanatory diagram showing a bird's-eye view of a system configuration for mounting a microwave probe on the top of a blast furnace and measuring a charged substance profile, The description will be given using the names and the same reference numerals.

In the measuring apparatus according to the first embodiment of the prior art 2, a probe housing case 8 having an opening 7 is projected from a conical gas collecting mantel 2 provided on the furnace top of a furnace body 1. A microwave probe (measuring device) 9 containing an antenna 10-1 and a microwave circuit box 10-2 is provided in the probe storage case 8. The microwave probe 9 is provided with a probe housing case 8 and a rotating shaft 11 in order to make it rotatable.
The shaft is sealed by a gland packing method, a mechanical seal method, or the like. Since the microwave probe 9 is installed inside the furnace, the antenna 1
0-1 is to avoid the influence of dust by purging with nitrogen gas or the like.

Gears provided outside the furnace for driving the rotary shaft 11 are, as shown in FIG.
3, a request signal is input to the motor 3, and the servo controller 22 that has received the request signal rotates the motor 18 to a specified rotation angle, and rotates the rotation shaft 11 via the gear 17-1 and the gear 16. Apex angle θ of the swing rotation position during measurement
Are a gear 16 directly connected to the rotating shaft 11 and a gear 17-2.
, And is input to the microwave signal processing board 21 as a probe rotation position.

The second prior art of the second conventional example is as follows.
FIG. 12 is a sectional view of the furnace top of the second embodiment in which a microwave probe is attached to the top of the blast furnace to measure the charge profile.
As shown in the figure, the microwave probe 9 is mounted on a spherical seat 48 in which a gasket 49 is fitted in a groove provided on the inner peripheral surface.
A gas seal valve 50 is interposed between the tilting mechanism and the tilting ring 47 to position the microwave probe 9 outside the furnace, thereby preventing deterioration of the antenna 10-1 and the microwave box 10-2. This is a configuration to be performed.

[0011]

The measuring apparatus using microwaves according to the above-mentioned prior art 1 is excellent as such.
However, in the measuring device according to the conventional example 1, since the radar unit is provided at the tip of the sound tube,
A pipe for cooling water, a pipe for cooling nitrogen gas, and a lead wire for leading output from the radar unit must be provided in the sonde pipe. Also, considering its maintainability,
Because the tip is configured to be detachable, it is necessary to disconnect and connect pipes and lead wires every time maintenance is performed. Was. In addition, it is necessary to cool the installed lead wires and the radar unit with water in order to protect them from heat, and to further shield the radar unit from harmful atmosphere. In other words, there is an economic problem that the structure of the measuring device must be extremely complicated and disadvantageous in terms of cost.

A particularly serious problem is that, when a normal signal is not transmitted from the radar unit, the surface property of the charge is abnormal and the microwave does not return due to reflection, or the radar unit is malfunctioning. I can't tell what it is. In order to confirm the soundness of the electronic circuit constituting the radar unit, generally, signals of various parts of the electronic circuit are observed to find an abnormal part. Even if some of the check signals are derived to the outside and checked, it is difficult to derive and check all the internal signals to a remote location (in this case, to the control panel outside the furnace). is there. In other words, when an internal weak signal is led out by many meters, the circuit constant changes and the function of the electronic circuit changes, and noise enters the electronic circuit from the outside.

[0013] In such a measuring apparatus, the radar unit is removed from the sonde tube, the parameters are adjusted under the same conditions as in the case where the raw material layer and the coke layer are irradiated with microwaves in the furnace, and then the radar unit is adjusted. Into a sonde tube for measurement of the distribution of the charge. However, radar units generally handle weak signals, and each part of the electronic circuit requires subtle adjustments.
In many cases, the adjustment cannot be performed well at one time. If the adjustment cannot be performed well, a large amount of labor and time are required to repeat the above operation.

In the microwave probe (measuring device) according to the first embodiment of the second conventional example, the microwave probe is disposed inside the furnace and the radar unit is exposed to a high temperature, so that the radar unit is protected from heat. It is necessary to provide a cooling unit for the radar unit and to shield the radar unit from harmful atmosphere. That is, as in the case of the first conventional example, there is an economic problem that the structure of the measuring device must be extremely complicated and the cost becomes disadvantageous.

The second embodiment of the prior art 2 is superior in that the microwave probe is provided outside the furnace, so that the radar unit is not exposed to a high temperature. Can be considered. However, when measuring the distribution shape of the charge, hot air enters due to the opening of the gas seal valve 50. Therefore, it is necessary to provide a cooling means for protecting the radar unit from heat as in the first embodiment of the second conventional example. In addition, despite the spread of reflected microwaves and reflected microwaves reflected on the charge, it must pass through the hole provided in the tilting ring and the gas seal valve. In order to prevent re-reflection, an extremely large tilting ring and a gas seal valve must be employed, resulting in high costs. further,
Since the tilt ring and gas seal valve are large and heavy,
A great deal of labor is required for its maintenance (for example, replacement of gaskets).

Therefore, an object of the present invention is to provide a simple structure,
In addition, it is an object of the present invention to provide a device and a method for measuring the shape of a charge distribution, which makes it possible to easily check the soundness of each part of an electronic circuit regardless of whether it is inserted in a blast furnace.

[0017]

Means for Solving the Problems The present inventors separate the antenna from the radar unit, that is, provide an antenna at the distal end of a portion of the sonde tube located inside the furnace, and provide a base end of the portion located outside the furnace. The present invention has been made on the assumption that the above-mentioned problem can be solved by providing a radar unit on the outside of the vehicle. Therefore, in order to solve the above-mentioned problem, the charge distribution according to claim 1 of the present invention is described. The means adopted by the shape measuring device are arranged outside the base end side of the sonde tube and a cylindrical sonde tube inserted so that the base end side is located outside the blast furnace and the tip end side is located inside the blast furnace, A radar unit that oscillates microwaves and receives reflected microwaves that have been irradiated and reflected back to the charge in the furnace, and an antenna installed inside the tip of the sonde tube; and the radar unit. Lead to the antenna from It is characterized in that a tube.

[0018] The means adopted by the apparatus for measuring the distribution of the charged material according to claim 2 of the present invention comprises a cylindrical sonde tube inserted so that the base end is located outside the blast furnace and the tip end is located inside the blast furnace. A radar unit disposed outside the base end of the sonde tube, oscillating microwaves, and receiving reflected microwaves that have been radiated and reflected back to the charge in the furnace, and
A swinging tubular body rotatably supported by a rotating mechanism provided at a tip end of the sonde tube and having a bent end, and an antenna provided at the tip of the swinging tubular body; One end is connected to the radar unit from the radar unit, one end is connected to the radar unit, the bent tip passes through the inside of the head swing cylinder, and the outer peripheral part is fixed to the head swing cylinder. And a activating means for activating the rotating mechanism.

The means adopted by the apparatus for measuring the shape of the charged material distribution according to claim 3 of the present invention is such that the base is inserted outside the blast furnace and the tip is positioned inside the blast furnace, and oscillates microwaves. A circular waveguide is provided at a base end of a radar unit that receives reflected microwaves that have been irradiated and reflected back to the charge in the furnace, and the distal end of the circular waveguide has a distal end. The antenna is provided so as to freely scan back and forth and left and right.

According to a fourth aspect of the present invention, there is provided a measuring apparatus for measuring a distribution of a charged substance according to a third aspect of the present invention, wherein the circular waveguide has a base end. A fixed waveguide in which a purge gas is supplied and a fixed waveguide which is connected to a tip of the fixed waveguide and which passes through a radial center of the fixed waveguide. A bent intermediate rotation waveguide that is rotated as a second rotation waveguide, and the antenna is attached to the front end of the intermediate rotation waveguide, and the antenna is mounted on the front end of the intermediate rotation waveguide. And a tip-rotating waveguide formed to be bent around an axis passing through the center in the radial direction.

According to a fifth aspect of the present invention, there is provided a method for measuring a charged object distribution shape, comprising: irradiating a charged object with microwaves from a radar unit provided outside the blast furnace through a waveguide;
An antenna in the blast furnace, the reflected microwave reflected back to the charge, a method for measuring the charge distribution shape of the blast furnace to be received by the radar unit through the waveguide,
The method is characterized in that the antenna is scanned in one direction (left and right) or in two directions (front, rear, left and right).

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, FIG. 1 is an explanatory view showing a state of mounting a charged substance distribution shape measuring apparatus according to a first embodiment of the present invention to a blast furnace, and FIG. 2 (a) is a side sectional view thereof. ) And FIG. 2B showing another state of the position A in FIG. 2A.
And FIG. 3 which is an explanatory diagram of the configuration of the radar unit.

Reference numeral 1 shown in FIGS. 1 and 2 is a device for measuring a charge distribution shape according to the first embodiment, and the measuring device 1 is arranged such that the tip side is located inside the blast furnace 100. , Is horizontally inserted into the blast furnace 100. More specifically, the measuring device 1 includes a cylindrical sound tube 2 inserted into the blast furnace 100. The tip side of the sonde tube 2 is closed by a tip cover member 21 having a convex curved surface,
At the lower part of the end face on the base end side, a nitrogen gas supply port 23 for supplying nitrogen gas is closed by a disk-shaped base end cover member 22 which protrudes. A radar unit 3 having a microwave oscillation circuit is provided at an outer position on the base end side of the sound tube 2, and an antenna 5 having a configuration to be described later is provided at a distal end thereof. Then, the base end cover member 22 is attached to a three-stub tuner 41 (see FIG. 3) provided at a position opposite to the base end side of the sound tube 2 of the radar unit 3.
Is connected to one end of a waveguide 4 that extends through the center in the radial direction of the sound tube 2 and extends in the distal direction, and the other end of the waveguide 4 is connected to the antenna 5. In addition, since the cover member for closing the front end side of the sound tube 2 may be formed in a disk shape, it is not particularly limited to the shape.

In the figure, the length of the sound tube 2 is not known, but the actual length of the sound tube 2 is 8 to 10 m. Therefore, it is conceivable that attenuation of microwaves becomes a problem because the waveguide 4 is also long. However, if the waveguide is made of copper, it will be 1-1.2 d / m
B is 0.6 dB per meter when gold plating is applied, and even if the length of the waveguide is 10 m, the attenuation is at most 6 dB. It is not necessary to consider the attenuation of microwaves caused by the above problem. The gold plating is applied to the inner wall of the waveguide. In that case, for example, a method such as vacuum evaporation may be used.

The antenna 5 has a quadrangular pyramid-shaped antenna body 51 having the top connected to the other end of the waveguide 4 and a rectangular opening. The antenna 5 is irradiated from the radiation port 4 a of the waveguide 4. The reflected microwaves are reflected in the right angle direction and transmitted from the opening in a direction (downward) orthogonal to the sound tube 2, and the reflected microwaves reflected back to the charge in the furnace are reflected in the right angle direction. And a reflector 52 returned to the waveguide 4. The rectangular opening of the reflector 52 is closed by a dustproof window 6 made of a heat-resistant member for closing the opening provided in the sound 2 and preventing dust from entering the sound tube 2. ing. In addition, as a material of the heat-resistant member, for example, a mica plate or the like can be used.

A purge gas injection nozzle 24 is provided at a position near the dustproof window 6 of the sonde tube 2. One end of the purge gas injection nozzle 24 is connected to the nitrogen gas supply port 23, and the other end of the gas supply pipe 7 extending in the front end of the sound tube 2 is connected thereto. That is, the nitrogen gas supplied from the gas supply source (not shown) to the purge gas injection nozzle 24 is supplied to the nitrogen gas supply port 23,
When the gas is supplied through the gas supply pipe 7, nitrogen gas is injected from the purge gas injection nozzle 24 toward the dustproof window 6, and the dust remaining near the front surface (lower surface) of the dustproof window 6 is blown away. Have been.

Hereinafter, the operation of the measuring apparatus 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. The microwaves transmitted from the microwave oscillating circuit 31 are circulators 32 and 33. , And through the three-stub tuner 41, through the waveguide 4 provided in the sound tube 2, toward the antenna 2.

On the other hand, a part of the microwave transmitted from the microwave oscillation circuit 31 is transmitted to the mixer 35 by the directional coupler 34. The microwave irradiated from the radiation port 4 a of the waveguide 4, reflected by the reflector 52 of the antenna 5, and irradiated toward the charge in the blast furnace 100 is reflected by the charge and is reflected by the reflector 52. The light is reflected and returned to the radar unit 3 via the antenna body 51 and the waveguide 4. The reflected microwaves returned to the radar unit 3
Is transmitted to the mixer 35 by the circulator 33 on the three-stub tuner 41 side. Then, the mixer 35 mixes the irradiated microwave and the reflected microwave to generate a beat wave having a frequency proportional to the distance between the antenna 5 and the charged object. From this, the distribution shape of the charge can be measured.

With such a measuring device 1, the blast furnace 100
When measuring the charge distribution shape in the inside, the radar unit 3 and the lead wires are different from the conventional example 1 in that the blast furnace 100
Since it is not exposed to a high temperature outside the device, there is no need to provide a cooling water pipe or a cooling nitrogen gas pipe for cooling them, and the structure is much simpler. It is economically advantageous. Further, as described above, since the radar unit 3 is provided outside the base end side of the sonde tube 2 and is located outside the blast furnace 100, it is not necessary to remove the radar unit 3 at the time of maintenance. Signals of various parts of the electronic circuit constituting the radar unit 3 can be easily attached to the blast furnace 100,
In addition, since the confirmation can be performed in a short time, the maintenance work is easy, and the operation can be completed in a much shorter time. Further, unlike the conventional example 1, it is not necessary to derive a few meters of a weak signal, and there is no possibility that the function of the electronic circuit changes due to the change of the circuit constant, so that the fine adjustment of each part of the electronic circuit becomes easy. As a result, the repetition of the adjustment work due to the failure of the adjustment is reduced, so that the labor and time required for the adjustment work of each part of the electronic circuit can be significantly reduced.

In the first embodiment, the radar unit 3 is not disposed inside the furnace as in the first embodiment of the second conventional example, and it is necessary to provide a cooling means for protecting the radar unit 3 from heat. In addition, since the structure of the measuring device 1 is simple, the cost is more advantageous than the first embodiment of the second conventional example. Further, unlike the second embodiment of the second conventional example, since there is no large tilt ring or gas seal valve which can be an obstacle in front of the antenna, maintenance is easier than the second embodiment of the second conventional example, and In addition to requiring less effort, the reflected microwaves that are reflected back to the charge
Directly reflected by the reflector 52 and received by the antenna main body 51, the distribution shape of the charged object can be accurately measured.

In the first embodiment, as described above, the waveguide 4 is of an integral construction and penetrates the base end cover member 22. For example, FIG.
As shown in (b), a two-part configuration is used to connect a portion between the three-stub tuner 41 and the base end cover member 22 and a portion between the base end cover member 22 and the antenna 5. Can be. When the waveguide 4 is divided into two parts as described above, the microwave is naturally attenuated because the waveguide 4 has a connection portion. However, the degree of microwave attenuation is negligible and can be sufficiently corrected by amplification by an amplifier provided on the electronic circuit side, and does not cause any trouble. It is not something to be done.

FIG. 4 is an explanatory view showing a state in which the measuring apparatus for measuring the distribution of charges according to the second embodiment of the present invention is mounted on a blast furnace.
5 (a) of a plan sectional view, FIG. 5 (b) of a side sectional view thereof, and FIG. 5 of a sectional view taken along line BB of FIG. 5 (b).
This will be described below with reference to FIG.

Reference numeral 11 denotes a measuring device for measuring the distribution shape of the charge in the blast furnace 100. The measuring device 11 is inserted into the blast furnace 100 obliquely downward. The measuring device 11 includes a sound tube 12 inserted obliquely downward into the blast furnace 100, and a radar unit 13 is disposed outside a base end cover member 122 of the sound tube 12 outside the blast furnace 100. . Also, at the tip of the sonde tube 12,
At the center of the distal end cover member 121, an outer cylindrical body and an inner cylindrical body which is fitted into each of the ends of the outer cylindrical body via bearings and has a gear 125 on the side opposite to the distal end cover member 121 are formed. A rotation mechanism 123 is provided. The inner cylinder body of the rotating mechanism 123 has a distal end bent to form an antenna 15 at the distal end.
The base part of the swinging cylinder 124 to which is fixed is fitted, and is rotated about an axis passing through the center of the base end in the radial direction. It is configured to be able to swing.

From the radar unit 13 to the antenna 15
A circular waveguide 14 having a configuration described later communicates therewith. One end of the circular waveguide 14 is the radar unit 1.
3 and penetrates the proximal end cover member 122 and
2 and the bent end passes through the oscillating cylinder 124, and the outer peripheral portion is fixed to the oscillating cylinder 124.

An operating means 16 for rotating the inner cylinder of the rotating mechanism 123 is provided inside the sound tube 12 and below the circular waveguide 14 in parallel with the circular waveguide 14. A rotating power transmission shaft 161 disposed, a worm wheel 162 fitted to a protruding end of the rotating power transmission shaft 161 from the base end cover member 122, a reversible rotatable and rotation angle detecting device, Worm gear 1 that is rotated by built-in motor 164 and meshes with worm wheel 162
63 and the pinion 1 fitted to the worm gear 163 side of the rotating power transmission shaft 161 and meshing with the gear 125 of the inner cylinder body
65. That is, in the measuring device 11 according to the second embodiment, the rotation of the rotating power transmission shaft 161 driven by the motor 164 causes the oscillating cylinder 124 to swing through the inner cylinder of the rotating mechanism 123 to form a circular shape. The radiation port 14a of the waveguide 14 and the antenna 15 are configured to be scanned in one left and right direction.

According to the measuring device 11 according to the second embodiment, the radar unit 13 is located outside the blast furnace 100, as in the measuring device 1 according to the first embodiment. Since no lead wire is provided in the inside, the same effect as the measuring device 1 according to the first embodiment is obtained. In addition to this effect, the oscillating operation of the oscillating cylinder 124 allows the radiation port 14a of the circular waveguide 14 and the antenna 15 to scan in one of the left and right directions. Because there is no need to slide
Gas sealing inside and outside the blast furnace 100 is facilitated, the frequency of replacing the seal member is reduced, and the seal member is also inexpensive.

FIG. 6 is a side view showing a state in which the measuring apparatus for measuring the distribution of charged materials according to Embodiment 3 of the present invention is mounted on a blast furnace.
(A) and FIG. 6 (b) showing a plan view of a state of attachment to a blast furnace.
And FIG. 8 of a perspective view of a main part thereof and FIG. 8 of a sectional view of a circular waveguide will be described below.

Reference numeral 21 denotes a measuring device for measuring the distribution shape of the charge in the blast furnace 100.
As in the case of the second embodiment, the blast furnace 100 is inserted obliquely downward. This measuring device 21 is a blast furnace 10
A circular waveguide 24 having a configuration to be described later, which is inserted obliquely downward at 0, is provided. And this circular waveguide 2
The radar unit 23 is disposed at the end outside the blast furnace 100 of No. 4 and an antenna 25 is attached to the tip.

The circular waveguide 24 is shown in FIG.
As shown in (b), when the mounting flange 242 provided on the base end side is mounted on the blast furnace 100, the straight fixed waveguide 2 inserted obliquely downward into the blast furnace 100.
41 are provided. At the tip of the fixed waveguide 241,
As shown in FIG. 7, a gear 244 is fitted to the fixed waveguide 241 side while being bent into an L shape, and is rotated about an axis passing through the radial center of the fixed waveguide 241. Intermediate rotating waveguide 24 which is swung in one direction in the horizontal direction.
3 are connected. Also, this intermediate rotation waveguide 243
Is formed in an L-shape at the tip of the intermediate rotating waveguide 2.
A bevel gear 246 is fitted on the 43 side, and an antenna 25 is attached to the distal end, and the intermediate rotational waveguide 243 is rotated about an axial center passing through the radial center of the distal end portion, and is rotated in the front-rear direction. Tip rotating waveguide 24 swinging in the direction
5 is connected.

The intermediate rotating waveguide 243 has a rotating shaft 26 rotated by a reversible rotatable drive motor (not shown).
1 and the gear 2
The first pivoting means 26 comprising a pinion 262 meshing with the gear 44 is configured to swing in one direction in the left-right direction. Further, the end rotation waveguide 247 includes a rotation shaft 271 that is rotated by a reversible rotatable drive motor (not shown), and a bevel pinion 272 that is fitted to a tip of the rotation shaft 271 and meshes with the bevel gear 246. It is configured to be swung in one direction in the front-rear direction by the second rotating means 27 composed of. Of course, each drive motor (not shown) is arranged at a position outside the blast furnace 100.

Further, the blast furnace 10 of the fixed waveguide 241
As shown in FIG. 8, a nitrogen gas supply port 247 is provided in the outer portion of the fixed waveguide 241, and the base end side of the fixed waveguide 241 is connected to the nitrogen gas supply port 247. A gas seal material 248 that prevents microwaves from penetrating into the radar unit and allows microwaves to pass therethrough is provided at the connection portion.

By the way, in the case of the circular waveguide 24 of the measuring apparatus 21 according to the third embodiment, as described above, there are three connection points. Therefore, although the microwave is attenuated,
The degree of microwave attenuation is extremely small, and can be sufficiently corrected by amplification by an amplifier provided on the electronic circuit side, and does not cause any trouble, so that it can be put to practical use.

According to the measuring device 21 according to the third embodiment, the radar unit 23 is located outside the blast furnace 100 and located at a portion located inside the blast furnace 100, similarly to the measuring device 1 according to the first embodiment. Since no lead wire is provided, the same effect as the measuring device 1 according to the first embodiment is obtained. In addition, since the circular waveguide 24 is not configured to slide, gas seals inside and outside the blast furnace 100 are facilitated similarly to the second embodiment, and the frequency of replacement of the seal members is reduced. This has the effect of being cheap. Further, the intermediate rotating waveguide 2 by the first rotating means 26
The radiation port of the circular waveguide 24 and the antenna 25 are scanned back and forth and left and right by the left and right rotation of the 43 and the front and rear rotation of the tip rotation waveguide 245 by the second rotation means 27. Since the charged object can be scanned and measured in a cross shape with one set of the measuring devices 21, the distribution shape of the charged object can be measured with higher accuracy.

[0044]

As described in detail above, claim 1 of the present invention
According to the apparatus for measuring the shape of the charged material distribution according to any one of claims 4 to 4 or the method for measuring the shape of the charged material distribution according to claim 5 of the present invention, the radar unit and the lead wire are different from the conventional example 2 in that the blast furnace Since it is not exposed to a high temperature outside the device, there is no need to provide cooling water piping or cooling nitrogen gas piping for cooling these components, and the structure is much simpler. It is economically advantageous.

Further, since the radar unit is located outside the blast furnace, it is not necessary to remove the radar unit during maintenance, and it is possible to easily and quickly transmit signals from the electronic circuits constituting the radar unit while the radar unit is mounted on the blast furnace. The maintenance work is easy and can be completed in a much shorter time.

Further, unlike conventional example 2, it is not necessary to derive a few meters of a weak signal, and there is no danger of a change in the function of the electronic circuit due to a change in the circuit constant. As a result, the repetition of the adjustment work due to the failure of the adjustment is reduced, and as a result, the labor and time required for the adjustment work of each part of the electronic circuit can be significantly reduced.

Furthermore, unlike the first embodiment of the third conventional example, it is not disposed inside the furnace, and there is no need to take cooling means for protecting the radar unit from heat, and the structure of the measuring device 1 is simple. Therefore, it is more advantageous in cost than the first embodiment of the third conventional example. Further, unlike the second embodiment of the third conventional example, since there is no large tilt ring or gas seal valve which can be an obstacle in front of the antenna, the maintenance is easier than the second embodiment of the third conventional example, and In addition to the reduced labor, the reflected microwaves reflected back to the load are directly received by the antenna, so that the distribution shape of the load can be accurately measured.

Further, the apparatus for measuring the distribution of the charge according to any one of claims 3 to 4 of the present invention, or claim 5 of the present invention.
According to the method for measuring the distribution shape of the charged substance according to the above, the radiation port of the circular waveguide and the antenna can be scanned in one direction in the left and right direction or in two directions in front and rear and right and left, and the measuring device is slid for scanning. Since there is no need to move the blast furnace, gas sealing inside and outside the blast furnace is facilitated, the frequency of replacing the seal member is reduced, and the cost of the seal member is reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a state in which a device for measuring a charge distribution shape according to Embodiment 1 of the present invention is attached to a blast furnace.

2 (a) is a side cross-sectional view of a device for measuring the shape of a charged substance distribution according to Embodiment 1 of the present invention, and FIG. 2 (b) is a view of a position A in FIG. 2 (a). It is a figure showing other states.

FIG. 3 is an explanatory diagram illustrating a configuration of a radar unit of the measurement device for the distribution shape of the charged material according to the first embodiment of the present invention.

FIG. 4 is an explanatory view of a state in which a device for measuring a charge distribution shape according to Embodiment 2 of the present invention is attached to a blast furnace.

5 (a) is a plan sectional view of a device for measuring a charged object distribution shape, and FIG. 5 (b) is a side sectional view of a device for measuring a charged material distribution shape according to the second embodiment; FIG. 5C shows FIG.
It is a BB sectional view taken on the line of (b).

6 (a) is a side view showing a state in which a measuring device for measuring the distribution of charged materials is attached to a blast furnace, and FIG. 6 (b) is a diagram showing the distribution of charged materials according to Embodiment 3 of the present invention. FIG. 3 is a plan view showing a state in which the measuring device is attached to a blast furnace.

FIG. 7 is a perspective view of a main part of an apparatus for measuring a charge distribution shape according to the third embodiment of the present invention.

FIG. 8 is a cross-sectional view of a circular waveguide according to the third embodiment of the present invention.

FIG. 9 is a partially cut-away side view of a measuring device using microwaves according to Conventional Example 1.

FIG. 10 is a sectional view of a furnace top for measuring a charge profile by attaching a microwave probe to the top of a blast furnace according to the first embodiment of Conventional Example 2.

FIG. 11 is an explanatory view of a microwave probe showing a bird's-eye view of a system configuration for measuring a charge profile by attaching a microwave probe to the top of a blast furnace according to the first embodiment of Conventional Example 2.

FIG. 12 is a sectional view of a furnace top for measuring a charge profile by attaching a probe to the furnace top according to the second embodiment of the conventional example 2.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Measuring device, 2 ... Sonde tube, 21 ... Tip cover member, 22
.., Base cover member, 23... Nitrogen gas supply port, 24... Gas injection nozzle, 3... Radar unit, 31... Microwave oscillation circuit, 32.
4 directional coupler, 35 mixer, 4 waveguide, 4a
... Emission port, 41 ... Three stub tuner, 5 ... Antenna, 51 ... Antenna body, 52 ... Reflector, 6 ... Dustproof window,
7 gas supply tube 11 measuring device 12 sonde tube 121 tip cover member 122 base cover member 123 rotating mechanism 124
Swing cylinder, 125 ... gear, 13 ... radar unit, 1
4 ... circular waveguide, 14a ... radiation port, 15 ... antenna, 1
Reference numeral 6: operating means, 161: rotating power transmission shaft, 162: worm wheel, 163: worm gear, 164: pinin 21: measuring device, 23: radar unit, 24: circular waveguide, 241: fixed waveguide, 242 ... Mounting flange,
243 intermediate rotation waveguide, 244 gear, 245 tip rotation waveguide, 246 bevel gear, 247 nitrogen gas supply port, 248 gas sealing material, 25 antenna, 26
1st rotation means, 261 ... rotation axis, 262 ... pinion, 2
7 second rotating means, 271 rotating shaft, 272 bevel pinion

Claims (5)

[Claims] 1. A cylindrical sonde tube which is inserted so that a base end is located outside a blast furnace and a tip end is located inside a blast furnace, and is disposed outside the base end of the sonde tube to oscillate microwaves. A radar unit that receives the reflected microwaves that have been irradiated and reflected back to the charge in the furnace, an antenna installed at the tip side of the sonde tube, and communication from the radar unit to the antenna An apparatus for measuring a charge distribution shape, comprising: 2. A cylindrical sonde tube which is inserted so that the base end is located outside the blast furnace and the tip end is located inside the blast furnace, and disposed outside the base end of the sonde tube to oscillate microwaves. And a radar unit that receives the reflected microwaves that have been irradiated and reflected back to the charge in the furnace, and are rotatably supported by a rotating mechanism provided at the distal end of the sonde tube. A swinging cylinder having a bent side, an antenna provided at the tip of the swinging tubular body, communicating with the antenna from the radar unit, one end connected to the radar unit, and an inside of the sonde tube. As described above, a bent waveguide has a circular waveguide having an outer peripheral portion fixed to the oscillating cylinder body while the bent tip passes through the oscillating cylinder body, and operating means for operating the rotating mechanism. Equipment for measuring the distribution of charge, characterized by Place. 3. A reflected microwave which is inserted so that the base end side is located outside the blast furnace and the tip end side is located inside the blast furnace, oscillates microwaves, and is irradiated and reflected by the charge in the furnace to return. The radar unit for receiving the signal includes a circular waveguide provided at the base end, and the distal end of the circular waveguide is configured to allow the antenna provided at the distal end to freely scan back and forth and left and right. An apparatus for measuring a charge distribution shape. 4. The fixed waveguide in which the radar unit is provided on the base end side and a purge gas is supplied into the inside of the circular waveguide, and the fixed waveguide is connected to the distal end of the fixed waveguide. A bent intermediate rotating waveguide that is rotated around an axis passing through the radial center of the waveguide, and the antenna is connected to the distal end of the intermediate rotating waveguide and is connected to the distal end. 4. A bent tip rotating waveguide which is attached and is turned around an axis passing through a radial center on a tip side of the intermediate turning waveguide. The apparatus for measuring a charge distribution shape according to claim 1. 5. A charged object is irradiated with microwaves from a radar unit provided outside the blast furnace through a waveguide, and reflected microwaves reflected back to the charged substance are returned to an antenna in the blast furnace and the antenna. A method for measuring a charge distribution shape of a blast furnace received by the radar unit via a wave tube, wherein the antenna is scanned in one direction (left and right) or in two directions (front, rear, left and right). Shape measurement method.