JP3205579B2 - Measuring device for blast furnace condition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the condition of a blast furnace furnace for measuring the temperature of a combustion zone (raceway) and a furnace core in a blast furnace and sampling gas in the furnace. It is.

[0002]

2. Description of the Related Art In recent years, a lance (or probe) provided with a sonde has been inserted into the blast furnace from the tuyere of the blast furnace to measure the temperature of the combustion zone and the core of the furnace, to sample the gas in the furnace and to determine the temperature of the furnace. It is possible to measure the condition of the furnace inside the blast furnace with the lance, such as sampling of coke in the core, and analyze the furnace condition and the mechanism of the reaction in the furnace based on the obtained measurement results to stabilize the operation of the blast furnace. Is being done.

[0003] As an example of the above-described apparatus for measuring the condition inside the blast furnace, Japanese Patent Application Laid-Open No. 62-274012 discloses the following apparatus for measuring the combustion zone in the blast furnace. That is, in this apparatus, the probe is inserted into the combustion zone of the tuyere adjacent to the different-diameter tuyere through the tubing of the different-diameter tuyere provided with the pod having a horizontal deflection angle. The temperature of the combustion zone and the core of the adjacent tuyere in the normally blown state is measured by a probe while preventing the backflow of the melt into the tuyere and the sheath by blowing from the tuyere of different diameter.

[0004]

The above-described conventional blast furnace condition measuring apparatus has the following problems. That is, the insertion of the lance (or probe) for measuring the condition inside the furnace into the furnace is performed by moving the bogie equipped with the lance toward the tuyere, running on a rail installed toward the tuyere. The lance is inserted into the furnace through the tuyere. In this way, when the lance is inserted into the furnace through the tuyere, an insertion reaction force acts on the lance. When this reaction force acts excessively on the lance, the lance, which is an elongated tube, is broken by buckling, resulting in gas leakage in the furnace.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and to prevent the lance from buckling due to an insertion reaction force when inserting the lance for measuring the condition inside the furnace into the furnace through the tuyere. It is an object of the present invention to provide an apparatus for measuring the condition inside a blast furnace.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and an apparatus of the present invention comprises a bogie capable of traveling toward a tuyere of a blast furnace, and a bogie on the bogie. In addition, a support table provided to be able to move up and down via an elevating mechanism, a machine frame provided on the support table, and a lance truck provided movably on the machine frame toward the tuyere, For moving the lance truck, a chain attached to the lance truck by being wound around a driving sprocket at one end of the machine frame and a driven sprocket at the other end of the machine frame, and attached to the lance truck. By the movement of the lance truck, a lance composed of an outer tube and an inner tube movable along the axis thereof in the outer tube, the tip of which can be inserted into the blast furnace through the tuyere, High through tuyere For measuring the reaction force which the lance is subjected when withdrawn from the insertion or the blast furnace within,
And a load cell mounted on the machine frame, wherein the load cell is connected to a pair of left and right bearings supporting a shaft of the drive sprocket by a connection mechanism.

[0007]

According to the apparatus of the present invention, when the lance is inserted into or pulled out of the blast furnace through the tuyere, the reaction force received by the lance can be measured by a load cell attached to the machine frame. Therefore, by controlling the speed of insertion or withdrawal of the lance, etc., based on the measured reaction force, it is possible to prevent buckling of the lance and the accompanying gas leakage in the furnace.

[0008]

Next, the present invention will be described with reference to the drawings. FIG. 1 is an overall side view showing an embodiment of the apparatus of the present invention. As shown in the drawing, on a first rail 1 installed toward the tuyere of a blast furnace, two trolleys 4 and 4 having wheels 3 that can run on the first rail 1 are arranged. Each of the two carriages 4 and 4 is provided with a support base 7 having a predetermined width, which can be moved up and down by the lifting mechanism 2.

The lifting mechanism 2 has a lower end pivotally supported by the bogie 4.
A first link 5 provided with a roller 8 rolling on the lower surface of the support base 7 at an upper end, and a roller 8 ′ rolling on the carriage 4 at a lower end.
A second link 6 whose upper end is pivotally supported by the support base 7 and whose center is rotatably connected to the first link 5 by a pin 9; and a first link 5 and a second link 5
And a hydraulic cylinder 10 for driving the motor.

The first link 5 and the second link 6 are provided in a pair at both ends in the width direction of the carriage 4 and the support base 7, and a lower portion of each pair of the first links 6 is connected to a connecting rod 11. Are connected to each other. The end of the hydraulic cylinder 10
The rod 10 a of the hydraulic cylinder 10 is pivotally mounted on a bracket 13 mounted on the center of the connecting rod 11. The two carts 4 and 4 having the above-described structure are connected to each other by the link
They are linked by 4,14.

When the rod 10a is extended by driving the hydraulic cylinder 10, the support plate 7 is raised by the first link 5 and the second link 6. On the other hand, when the rod 10a is contracted, the first link 5 and the second link 6 lower the support plate 7. 2
On the support plates 7 of the trolleys 4, 4, a machine frame 20 is placed in parallel with the first rail 1 over the support plates 7. The machine casing 20 is movable in the width direction of the support plates 7,7.

The machine frame 20 is provided with a second rail 21 parallel to the first rail 1 in the longitudinal direction. On such a machine frame 20, a lance truck 22 is moved by its wheels 23 to a second position.
It is movably mounted on the rail 21 toward the tuyere.
A driving sprocket 24 is provided at a leading end of the machine casing 20, and a driven sprocket 25 is provided at a trailing end. One end of a chain 26 is attached to the tip of the lance truck 22, and the chain 26 is wound around a driving sprocket 24 and a driven sprocket 25, and the other end is attached to the rear end of the lance truck 22. I have. Therefore, the motor
The lance truck 22 reciprocates on the second rail 21 of the machine frame 20 by rotating the drive sprocket 24 forward and backward by the 27 and the speed reducer 28.

A lance 29 is mounted on the lance carriage 22, and a leading end of the lance 29 is movably supported by a guide roller 32 attached to a leading end of the machine frame 20. The lance 29 has an outer tube 30 and an outer tube 30 inside the outer tube 30.
It has a triple pipe structure consisting of an inner pipe 31 inserted coaxially with the outer pipe 30 and a flow pipe for cooling water circulation provided inside the outer pipe 30. The outer pipe 30 is provided with a water supply port 33 and a drain port. The cooling water pressurized by the pump is supplied into the outer pipe 30 through the water supply port 33. The cooling water supplied into the outer pipe 30 passes through a flow path inside the outer pipe 30, is inverted at its tip, and is drained from a drain port 34. As described above, the cooling water flows through the flow path at a high speed of 1 to 3 m / sec to cool the outer pipe 30 and
From the high heat in the blast furnace.

A gas seal mechanism 35 is connected to the rear end of the outer tube 30, and is inserted into the outer tube 30 through the gas seal mechanism 35.
31 is inserted. The inner tube 31 can be moved inside the outer tube 30 by the operation of the hydraulic cylinder 36 mounted on the lance truck 23.

FIG. 2 is a partially broken enlarged side view showing a driving sprocket portion of the apparatus of the present invention, and FIG.
FIG. 3 is a sectional view taken along line XX of FIG. Chain as shown in the drawing
The shaft 37 of the drive sprocket 24 around which 26 is wound is
Movably mounted in the direction of the chain 26. A pair of bearings 38, 38 are fitted to the shaft 37 between the machine casing 20 and the boss portion of the drive sprocket 24. The pair of bearings 38, 38 have a bifurcated bracket 39. Is fixed.

A load cell 41 is attached to a seat plate 40 provided inside the machine frame 20 by bolts 42. A joint 44 is fixed to the tip of a bolt 42 for mounting the load cell 41, and the joint 44 is connected to a bracket 39 fixed to a pair of bearings 38,38. In this way,
The bracket 39 and the load cell 41 are connected by tightening a nut 43 attached to a bolt.

The two trucks 4 and 4 are moved forward and the lance 29
Is located near the tuyere. The support base 7 is moved up and down by operating the hydraulic cylinder 10 of the elevating mechanism 2 provided on the carriage 4, and the lance 29 and the tuyere are vertically aligned. Next, the machine frame 20 is horizontally moved in the width direction of the support base 7, and the lance 29 and the tuyere are aligned in the horizontal direction. Next, the lance truck 22 is advanced, and the outer tube 30 of the lance 29 attached to the lance truck 22 is caused to enter the blast furnace through the tuyere. In this way, when the tip of the outer tube 30 of the lance 29 reaches just before the measurement position in the furnace, the advancement of the lance carriage 22 is stopped. Then, the hydraulic cylinder 36 provided on the lance carriage 22 is driven to cause the distal end of the inner tube 31 of the lance 29 to protrude from the distal end of the outer tube 30. It measures the temperature and samples the furnace gas.

The reaction force received when the outer tube 30 and the inner tube 31 of the lance 29 are inserted into the furnace becomes tension of the chain 26 via the lance truck 22. The tension of the chain 26 is applied to the load cell via the driving sprocket 24, the driving sprocket shaft 37, the bearing 38, the bracket 39, the bolt 42 and the nut 43.
It is transmitted to 41. At this time, the minute displacement of the shaft 37 caused by the deformation of the load cell 41 by the load applied to the load cell 41 is absorbed by the coupling 45 provided between the shaft 37 and the output shaft of the speed reducer 28.

Thus, by measuring the load applied to the load cell 41, the propulsion reaction force applied to the lance 29 can be known. The value measured by the load cell 41 is displayed or recorded by a display or a recorder of a control panel (not shown). Since the resistance generated when the lance 29 is pulled out of the furnace also acts as the tension of the chain 26, it can be measured by the load cell 41 in the same manner as described above.

[0020]

As described above, according to the apparatus of the present invention, when the lance is inserted into or extracted from the blast furnace through the tuyere, the reaction force received by the lance by the load cell attached to the machine frame. Can be measured. Therefore, the speed of insertion or withdrawal of the lance or the like can be controlled by the measured reaction force, and thereby, buckling of the lance and accompanying leakage of gas in the furnace can be prevented. The effect is brought.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an embodiment of the apparatus of the present invention.

FIG. 2 is a partially broken enlarged side view showing a driving sprocket portion of the device of the present invention.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 1st rail 36 hydraulic cylinder 2 lifting mechanism 37 axis 3 wheel 38 bearing 4 cart 39 bracket 5 1st link 40 seat plate 6 2nd link 41 load cell 7 support base 42 bolt 8 roller 43 nut 9 pin 44 joint 10 hydraulic cylinder 45 Coupling 11 Connecting rod 12, 13 Bracket 14 Connecting link 20 Machine frame 21 Second rail 22 Lance bogie 23 Wheel 24 Drive sprocket 25 Follower sprocket 25 Chain 26 Motor 27 Reduction gear 29 Lance 30 Outer pipe 31 Inner pipe 32 Guide roller 33 Water supply Port 34 Drain port 35 Gas seal mechanism

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shuji Maehara Fukuyama Kyoki Co., Ltd., the first location of Kokancho, Fukuyama City, Hiroshima Prefecture (56) References JP-A-63-118007 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) C21B 7/24 305 F27B 1/28 F27D 21/00

Claims (1)

(57) [Claims] 1. A truck that can travel toward tuyeres of a blast furnace;
A support table provided on the carriage so as to be vertically movable via an elevating mechanism, a machine frame provided on the support table, and a lance provided on the machine frame so as to be movable toward the tuyere. A trolley, a chain attached to the lance trolley for being moved around a drive sprocket at one end of the machine frame and a driven sprocket at the other end of the machine frame for moving the lance trolley, and attached to the lance trolley. A lance having an outer tube and an inner tube movable along the axis of the outer tube, the tip of which can be inserted into the blast furnace through the tuyere by the movement of the lance carriage; A load cell attached to the machine frame for measuring a reaction force received by the lance when the lance is inserted into or pulled out of the blast furnace through the tuyere. Cells, the right and left pair of bearings supporting the shaft of the drive sprocket, characterized in that it is connected by a connecting mechanism, measuring devices blast furnace situation.