JP2001107117A - Temperature-measuring and sampling device of molten metal in furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely, accurately and quickly execute the temperature measurement and the sampling of molten metal in a furnace with a mechanical device without manually executing the temperature measurement and the sampling by inserting a probe directly into the molten metal in a furnace. SOLUTION: This device is provided with a circular arc shaped rod 2, with which a probe for measuring the temperature and sampling in the molten metal, such as molten iron and molten steel, can be fitted so as to be freely attached and detached, a supporting guide 3 for supporting this rod 2 so as to be movable in the longitudinal direction and a rod working means 4 reciprocatively moving the rod 2 in the longitudinal direction. Further, this device is provided with a derricking means 5 for derricking the rod 2 through the supporting guide 3, a slewing means 6 for slewing the rod 2 and an elevating and lowering means 7 for elevating and lowering the rod 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a probe for inserting a molten metal into a furnace from the outside of the furnace to check the state of the molten metal (hot metal, molten steel, etc.) in the furnace at a steelmaking site. The present invention relates to an apparatus for measuring and sampling the temperature of a molten metal in a furnace to be moved outside the furnace after the temperature measurement and sampling.

[0002]

2. Description of the Related Art Conventionally, in an electric furnace such as a steelmaking steelmaking site, a probe for temperature measurement and sampling is attached to a tip of an iron rod in order to measure a temperature and a component of a molten metal in the furnace. A probe is put into the furnace manually through an iron bar several times a day through an opening formed in a side portion through an iron bar, and temperature measurement and sampling of the molten metal are performed. Then, the components of the molten metal are adjusted according to the inspection results of the sampling, and the electric furnace is controlled based on the measured temperature results.

[0003]

However, since the width of the edge (bank) in the furnace main body is wider than the diameter of the opening hole, the molten metal in the furnace main body extends from the opening hole beyond the above-mentioned edge (bank). Even when trying to insert the probe inside, it was difficult to insert the probe into the molten metal with a straight iron bar. Therefore, on the site, a skilled worker bends the iron bar into an appropriate round shape based on experience, attaches a probe to the tip of the bent iron bar, and inserts the probe into the molten metal in the furnace body. However, since impurities and curls are floating near the surface of the molten metal, proper temperature measurement and sampling cannot be obtained unless a probe is inserted to a predetermined depth from the surface of the molten metal. The depth of insertion of the probe into the molten metal was not constant, and proper temperature measurement and sampling could not be performed unless a skilled worker was used.

[0004] In addition, the temperature near the electric furnace is high, and manual work near the electric furnace is extremely dangerous because hot air may blow out from the opening.

[0005] In view of the above points, the conventional manual measurement and sampling of molten metal using a steel bar is problematic in terms of work efficiency, measurement accuracy, safety, and the like. Was desired.

[0006] The present invention has been developed in view of such a problem, and an object thereof is to perform temperature measurement and sampling without manually inserting a probe into a molten metal in a furnace. It is an object of the present invention to provide an apparatus for measuring and sampling the temperature of a molten metal in a furnace, which can safely, accurately and quickly measure and sample the molten metal by using a machine.

[0007]

Accordingly, the present invention has the following configuration in order to effectively achieve the above object. That is, the temperature measuring and sampling apparatus for molten metal in a furnace according to the present invention according to claim 1 includes an arc-shaped rod to which a probe for measuring and sampling the temperature of molten metal such as hot metal and molten steel can be detachably attached, and this rod is formed by: A support guide movably supports in the length direction and a rod operating means for reciprocating the rod supported by the support guide in the length direction.

[0008] The temperature measurement of the molten metal in the furnace according to the second aspect of the present invention.
The sampling device measures the temperature of the molten metal in the furnace according to claim 1.
In the configuration of the sampling device, an up-and-down means for raising and lowering the rod via a support guide is provided.

The temperature measurement of the molten metal in the furnace according to the third aspect of the present invention.
The sampling device measures the temperature of the molten metal in the furnace according to claim 1.
In the configuration of the sampling device, a configuration is provided in which a turning means for turning the rod via a support guide is provided.

[0010] The temperature measurement of the molten metal in the furnace of the present invention according to claim 4 is performed.
The sampling device measures the temperature of the molten metal in the furnace according to claim 1.
In the configuration of the sampling device, a configuration is provided in which a lifting unit that raises and lowers the rod via a support guide is provided.

[0011]

Embodiments of the present invention will be described below. FIG. 1 is an overall explanatory view of a temperature measuring / sampling device for molten metal in a furnace according to the present invention, and FIG. 2 is a diagram illustrating a state in which a probe A is inserted into the molten metal in the furnace by the temperature measuring / sampling device for molten metal in a furnace according to the present invention. FIGS. 3 and 4 are explanatory views showing the movement of the rod 2 by the rod operating means 4 and the undulating means 5.
Is an explanatory view of a temperature measuring and sampling apparatus for molten metal in the furnace of the present invention in a state where the probe A is inserted into the furnace, as viewed from a plane direction,
FIG. 5 is an explanatory view of the position of the rollers 30, 31 facing the rod 2, the support guide 3, and the rod operating means 4 when viewed from the transverse direction, and FIG. 6 is a rod 2, the support guide 3, and the rod operating means of the present invention. 4 is an explanatory view of the rod 2 viewed from the longitudinal direction of the rod 2;
FIG. 7 is an explanatory diagram of the probe A.

In these figures, a temperature measuring and sampling apparatus 1 for molten metal in a furnace (FIG. 1) of the present invention has a probe A (see FIG. 2) for measuring and sampling molten metal such as hot metal and molten steel, which is detachable. An arc-shaped rod 2 that can be attached to
A support guide 3 for movably supporting the rod 2 and a rod operating means 4 for reciprocating the rod 2 supported by the support guide 3 are provided. This is configured to include an undulating means 5 (see FIG. 1) for raising and lowering the table, a turning means 6 for turning the support guide 3, and an elevating means 7 for raising and lowering the support guide 3.

[0013] A temperature measuring and sampling device 1 for the molten metal in the furnace 1
More specifically, first, the probe A
(See FIG. 2) for example, in order to measure and sample the temperature of the molten metal D in the furnace of the electric furnace B at predetermined time intervals, it is attached to the tip of the rod 2 of the temperature measuring and sampling apparatus 1 for molten metal in the furnace of the present invention. As shown in FIG. 7, one end of a probe body (paper tube) 8 has a sample chamber 10 in which a concave portion 9 for scooping a molten metal D is formed. A thermocouple 11 is provided. Further, a hollow connection holder 13 having a male screw portion 12 formed at the rear is fixed to the other end of the probe main body (paper tube) 8. A plug 15 is provided in the connection holder 13, and a socket 17 is provided on the tip side of the probe body (paper tube) 8. The cable 14 is connected to the probe body (paper tube) 8 and the connection holder 13 through the plug 15 and the socket 17.
And is connected to the thermocouple 11 described above.

When the probe A is attached to the rod 2 to be described later, the plug 15 of the probe A is pulled out from the inside of the connection holder 13 and connected to the socket 16 of the rod 2. Is screwed into the female screw portion 18 at the distal end of the rod 2 and attached. A cable 19 provided in the rod 2 is connected to the socket 16 of the rod 2. Probe A and rod 2
May be a structure connected by a flange.

Next, the rod 2 for attaching the probe A (see FIGS. 2 to 6) has an upper plate 20 (see FIG. 5) in which an elongated plate member is formed in an arc shape, and is the same as the upper plate 20. A lower plate portion 21 formed in the shape of an arc and a rack member 23 formed on both sides of the lower plate portion 21 and having uneven teeth continuously formed on the lower surface side in the form of an entire arc fixed by bolts (or screws) 22.
(See FIG. 6), and both side plate members 24 and 25 formed in the same arc shape as the upper plate portion 20 and the rack member 23 are combined in a rectangular tube shape to form a rack 26, and the rack 26 is formed.
And an arc-shaped cylindrical rod body 27 mounted in the rack 26. A stopper 28 (see FIG. 6) is provided at the upper end of the rear end of the rack 26 to prevent the rod 2 from falling off from a support guide 3 described later. The rod 2 is supported by a support guide 3 so as to be able to reciprocate.

Next, the support guide 3 (see FIGS. 5 and 6)
Horizontally elongated rectangular parallelepiped casing 29 with open ends
And rollers 30, 3 rotatably provided via metal bearings 34, 35 above and below near both ends in the casing 29.
1. These rollers 30, 31
Are provided at positions facing each other at a predetermined interval, and the upper rollers 30 abut on the upper plate 20 of the rod 2 so as to freely roll, and the lower rollers 31 roll on the lower plate 21 of the rod 2. The rod 2 inserted freely from both ends 32 and 33 of the casing 29 is movably supported so as to sandwich the rod 2 from above and below. Further, the rod 2 is connected to the rod operating means 4 via the support guide 3.

The rod operating means 4 (see FIGS. 1, 4 and 6) includes a drive motor 36, a transmission shaft 37, and a free joint 3
8, 39, a shaft 40, a pair of bearings 41, a small sprocket 42, a shaft 43, a large sprocket 44, an endless chain 45, and a pinion gear 46.

That is, the drive motor 36 is disposed on the gantry 47 with the rod 2 and the drive shaft 48 orthogonal to each other. The transmission shaft 37 is connected to the drive shaft 48 via the free joint 38. A shaft 40 is connected to the other end of the transmission shaft 37 via a free joint 39. Axis 4
Numeral 0 is rotatably supported by a pair of bearings 41 provided on the casing 29 of the support guide 3 at predetermined intervals. The shaft 40 is provided to be orthogonal to the rod 2.

A small sprocket 42 is fitted to one end of the shaft 40. Further, the casing 29 is parallel to the axis 40 and
A shaft 43 is rotatably provided near a lower portion of the vehicle through a bearing (not shown). A large sprocket 44 is fitted to one end of the shaft 43, and the large sprocket 44 and the small sprocket 42 are connected to each other by an endless chain 45. The shaft 43 has the rod 2
A pinion gear 46 is fitted so as to mesh with the rack member 23 of FIG. Reference numeral 49 denotes a safety cover, one end of which is supported by the gantry 47 and the other end of which is supported by the casing 29. The transmission shaft 37, the free joints 38 and 39, the shaft 40, and the bearing 4
1. The small sprocket 42, the endless chain 45, and the large sprocket 44 are covered to enhance safety.

When the driving motor 36 is driven, the above-mentioned rod operating means 4 rotates the transmission shaft 37 via the free joint 38, and the rotational force is applied to the free joint 39 and the shaft 4.
0, the small sprocket 42, the endless chain 45, the large sprocket 44, the shaft 26, and the rack 26 can be moved forward or backward via a pinion gear 46 that rotates with the rotation of the shaft 43.

The above-mentioned rod 2 can be further moved in the vertical direction by means of the undulating means 5.

The undulating means 5 (see FIG. 1) includes support members 50 and 51 provided below the gantry 47, a cylindrical body 52 supported by the support members 50 and 51,
An operating cylinder 56 rotatably supported by the metal bearings 53 and 54 in the cylindrical body 52 and having one end fixed to the side surface 55 of the casing 29; An annular operating body 58 fixed to the other end of the operating cylinder 56 and having a protruding portion 57 protruding laterally, a support 59 provided on the upper part of the gantry 47, and a piston rod 60 hanging down from the support 59. And the electric cylinder 61 provided as described above. The distal end of the piston rod 60 of the electric cylinder 61 is connected to the projection 57 of the working annular body 58.

By operating the electric cylinder 61, the piston rod 60 expands or contracts, and the operating annular body 58 can be slightly moved in the forward or reverse direction. Due to the rotation of the operating ring 58, the operating cylinder 56 also slightly moves in the forward or reverse rotation direction, and moves the rod 2 upward or downward via the support guide 3 including the casing 29 connected to the operating cylinder 56. be able to. Thus, when inserting the probe A attached to the tip of the rod 2 into the molten metal D, the undulating means 5 (see FIG. 1) can finely adjust the insertion distance of the probe A with respect to the molten metal D.

The above-mentioned rod 2, support guide 3, rod operating means 4 and undulating means 5 can be simultaneously turned horizontally by turning means 6.

The turning means 6 (see FIGS. 1 and 4) is provided so that it projects downward from the end of the
7, a large gear 63 fitted to the main shaft 62, a small gear 64 meshed with the large gear 63, a bevel gear 65 provided with the small gear 64 outside, a bevel gear 65 and a cup. And a turning motor 67 connected via a ring 66. The turning motor 67 and the bevel gear 65 are provided horizontally on a part of an elevator 68 described later. The lower end of the main shaft 62 is rotatably supported by a bearing 69 provided on a lift 68.

In the revolving means 6, by driving the revolving motor 67, the large gear 63 provided on the gantry 47 can be rotated to a predetermined displacement angle via the bevel gear 65 and the small gear 64. This allows the mounting 47
Means 5, supporting guide 3 (and driving means 7) provided in
, The rod 2 can be turned in the horizontal direction.

Further, the rod 2 can be moved up and down through the turning means 6, the undulating means 5, the rod operating means 4 and the support guide 3 by the elevating means 7 including the elevating table 68 described above.

That is, the elevating means 7 (see FIG. 1) includes the elevating platform 68, a cylindrical outer cylinder 70 having the elevating platform 68 fixed on the upper portion thereof, and a vertically movable support for the outer cylinder 70. Inner cylinder 71, an electric cylinder 72 for elevating and lowering provided in the inner cylinder 71, a support 73 for erecting the inner cylinder 71 together with the electric cylinder 72 for elevating and lowering, A motor 74 for driving the electric cylinder 72 for lifting and lowering, and a speed reducer 75. The tip 77 of the piston rod 76 of the electric cylinder 72 for elevating
Is connected to a connecting portion 78 provided on the lower surface of the.

By driving the motor 74 of the lifting / lowering means 7 to rotate the drive shaft (not shown) forward or backward, the piston rod 76 of the lifting / lowering electric cylinder 72 expands or contracts. Thus, the lift 2 can be raised or lowered, and the rod 2 can be moved up and down via the turning means 6, the undulating means 5, the rod operating means 4 and the support guide 3.

The temperature measuring / sampling apparatus 1 (see FIGS. 2 to 4) of the in-furnace molten metal of the present invention having the above-described structure is provided.
It is installed on the work deck E near the opening C of the electric furnace B. The installation position of the temperature measuring / sampling device 1 is determined by the distance from the position outside the opening C of the electric furnace B to the position of the molten metal D in the furnace of the electric furnace B into which the probe A is to be inserted.
Is theoretically determined and determined from the outside position of the electric cylinder 72 to the lifting electric cylinder 72.

Next, an example in which the temperature measurement and sampling of the molten metal D in the furnace of the electric furnace B using the temperature measurement / sampling apparatus 1 will be described.

First, the rod 2 is usually kept on standby outside the electric furnace B. When measuring the temperature and sampling of the molten metal D, the worker holds the probe A and holds the work deck E.
And the male thread 12 of the probe A (see FIG. 7)
Is screwed into the female screw portion 18 at the tip of the rack 26 of the rod 2 and mounted.

After this, the lifting means 7 is operated and the turning means 6 is operated so that the tip of the probe A is located near the center of the opening C of the electric furnace B. Next, the rod operating means 4 is operated to move the rack 26 of the rod 2 a predetermined distance in the furnace direction.

Next, the undulating means 5 is operated to move the probe A together with the rod 2 so as to bow downward, so that the sample chamber 10 of the probe A is 10 cm from the surface of the molten metal D.
Sink. At this time, the temperature of the molten metal D is detected by the thermocouple 11 at the tip of the probe A,
The zero recess 9 is filled with the molten metal D. Then, the undulating means 5 is operated again to move the rod 2 upward, and the thermocouple 11 of the probe A and the sample chamber 10 are pulled up from the inside of the molten metal D.

Next, the rod operating means 4 is operated to move the rack 26 of the rod 2 out of the furnace from the opening C, and the probe A is moved out of the furnace. Next, the turning means 6 is operated to move the probe A to a position where the work Denki E can easily work, and the elevating means 7 is operated to lower the probe A together with the rod 2, and the probe A is scooped by the recess 9 of the probe A. Melt D
From the recess 9.

Thus, the temperature measurement and sampling of the molten metal in the furnace are completed, and the probe A used this time is replaced with a new probe for the next temperature measurement and sampling.
Wait for the next temperature measurement and sampling.

As described above, by using the apparatus 1 for measuring and sampling the temperature of the molten metal in the furnace according to the present invention, even an operator who has no experience in measuring and sampling the temperature of the molten metal D in the furnace can be easily, safely, and safely. Can be done accurately.

FIG. 8 is an explanatory view showing another example of the temperature measuring / sampling device 1a for the molten metal in the furnace of the present invention. It should be noted that components different from the in-furnace temperature measuring and sampling device 1 of the above-described example will be described, and other components are the same as those of the in-furnace temperature measuring and sampling device 1 and will not be described. I do.

The temperature measuring / sampling device 1a for the molten metal in the furnace of this embodiment comprises a flange 8
0, and is connected to the flange 82 of the cylinder 81 provided on the side of the casing 29 by bolts and nuts.
A rotating shaft 79 is rotatably provided in the working cylinder 56, and a gear 83 is fixed to one end (the casing 29 side) of the rotating shaft 79. The gear 83 is connected to the rack member 23 of the rod 2.
And meshed. The other end of the rotating shaft 79 is connected to a rotating shaft driving motor 85 via a speed reducer 84. The rotating shaft drive motor 85 and the speed reducer 84
7 is provided and supported on a support base 86 provided at the lower part of. Further, a locking member 87 is provided near the casing 29 of the operating cylinder 56, and is connected to a locking member 88 provided at one end of the gantry 47 by a connecting rod 90 (an elongated round shaft, a wire, or the like) having a tie rod 89. , And supports the rod 2, the support guide 2, and the rod driving means 4.

Also in this example, the rotating shaft driving motor 8
5, the reduction gear 84, the rotating shaft 79,
The rack 26 can be reciprocated via the gear 83, and the temperature measurement and sampling of the in-furnace molten metal D can be performed safely and reliably together with the operation of other means as in the above-described example.

[0041]

As described above, the temperature measuring / sampling apparatus for molten metal in the furnace of the present invention can be easily, quickly, reliably, and safely measured from a narrow frontage even if it is not an expert.
Sampling can be performed accurately.

Further, by providing the raising and lowering means, the turning means, and the elevating means, the probe provided at the tip of the rod can be more accurately inserted into a predetermined position in the molten metal in the furnace, and the measurement of the molten metal can be performed. The temperature and sampling can be performed safely and efficiently, and the sample can be taken out accurately, and the probe replacement operation can be performed efficiently in a certain safe place.

[0043]

[Brief description of the drawings]

FIG. 1 is an overall explanatory diagram of an apparatus for measuring and sampling temperature of molten metal in a furnace according to the present invention.

FIG. 2 is an explanatory view showing a state in which a probe A is inserted into the molten metal in the furnace by the temperature measuring and sampling device for the molten metal in the furnace of the present invention.

FIG. 3 is an explanatory view showing the movement of the rod 2 by the rod operating means 4 and the undulating means 5;

FIG. 4 is an explanatory diagram showing a plan view of the apparatus for measuring and sampling temperature of molten metal in a furnace of the present invention in a state where a probe A is inserted into the furnace.

FIG. 5 is an explanatory view of the position of rollers 30, 31 facing the rod 2, the support guide 3, and the rod operating means 4 of the present invention, as viewed from the transverse direction.

FIG. 6 is an explanatory view of the rod 2, the support guide 3, and the rod operating means 4 of the present invention viewed from the longitudinal direction of the rod 2.

FIG. 7 is an explanatory diagram of a probe A.

FIG. 8 is an explanatory view of another example of a temperature measuring and sampling device for molten metal in a furnace according to the present invention.

[Explanation of symbols]

 1 (1a) Temperature measuring and sampling device for molten metal in furnace 2 Rod 3 Supporting guide 4 Rod operating means 5 Undulating means 6 Turning means 7 Elevating means A Probe D Molten metal

Claims (4)

[Claims] 1. An arc-shaped rod to which a probe for temperature measurement and sampling of molten metal such as hot metal or molten steel can be detachably attached, a support guide for supporting the rod movably in a length direction, and this support guide And a rod actuating means for reciprocating a rod supported by the rod in the longitudinal direction. 2. The apparatus for measuring and sampling temperature of molten metal in a furnace according to claim 1, further comprising a means for raising and lowering the rod via a support guide. 3. The temperature measuring and sampling apparatus for molten metal in a furnace according to claim 1, further comprising a turning means for turning the rod via a support guide. 4. The apparatus for measuring and sampling temperature of molten metal in a furnace according to claim 1, further comprising elevating means for elevating and lowering the rod via a support guide.