JPH0735523B2 - Tap hole opening device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a taphole opening device, and more specifically to a device for performing work for opening a taphole of a blast furnace.

<< Prior Art >> First, when the tap hole of the blast furnace is to be opened, it is conceivable to use an excavating drill made of tungsten carbide and to penetrate the side wall of the blast furnace all the way to the end. But,
In the case of a blast furnace, the high temperature liquid stored in the blast furnace at the same time as the opening is discharged to the outside through a runner formed by a drill. As a result, if the drill is used even when completely penetrating the side wall, the drilling drill made of expensive tungsten carbide will be melted by contact with the high temperature liquid stored in the blast furnace. It becomes impossible to use.

Therefore, in the prior art, firstly, the excavation drill is first excavated to a predetermined position on the side wall of the blast furnace, then the excavation drill is retracted and replaced with a relatively inexpensive gold rod, and the gold rod is excavated by the excavation drill. It was made to go inside, and the second excavation was carried out by driving a gold rod to penetrate the side wall.

Then, conventionally, as described above, while excavating to a predetermined depth without completely penetrating in the primary excavation or accurately positioning the gold rod for the secondary excavation in the hole formed in the primary excavation. Various work and operating conditions such as insertion and placement are required, and skill is required for operation.
-The above operation can be performed by operating the switch such as a button of the blast furnace tap hole opening device shown in No. 18420 so that the operation requires relatively little skill and eliminates individual differences. There was something.

<< Problems to be Solved by the Invention >> However, according to the above-described conventional device, the operation is complicated because the taphole opening device is driven by turning on and off a large number of button switches. was there. In particular, there are cases where it is necessary to press a plurality of switches from among a large number of switches almost at the same time, and the above problem is all the more serious, and there is a possibility that a malfunction may occur due to a wrong pressing.

Further, in the conventional device, since the switch is turned on and off away from the place where the hole is actually opened, it is difficult to perform accurate positioning.

This invention has been made in view of the above problems,
It is an object of the invention to provide a tap hole opening device which does not require a gradual heat kneading degree, eliminates individual differences, and can accurately and easily open a tap hole of a blast furnace. .

<< Means for Solving Problems >> In order to achieve the above-mentioned object, a tap hole opening device according to the present invention includes a swingable boom device and an output device rotatably attached to a tip of the boom device. In a taphole punching device having a pigeonhole punching machine, a position detector means for detecting the position of the pigeonhole punching machine, and a position signal of the taphole punching machine detected by the detecting means. According to the first control means for moving, positioning and retracting the tap hole opening machine with respect to the tap hole, and the amount of forward movement of the excavating drill or gold rod attached to the tap hole opening machine. Parameter storage means for determining the number of revolutions and striking force as parameters, movement detection means for detecting the forward movement amount, and comparison of the value detected by the movement amount detection means with the value stored in the parameter storage means. And the comparison means Second control means for controlling the tap hole punching machine according to the detected parameters of the number of revolutions of the punching machine and the striking force are provided.

<< Operation >> The position detecting means and the first control means which is operated by a signal sent from the position detecting means accurately position the tap hole opening machine in front of a predetermined tap hole.

Next, the tap hole opening machine is operated to open the tap hole at a predetermined position. At this time, the second hole installed on the tap hole opening machine
The control means can control the rotation, forward speed, etc. of the drilling drill or the gold rod to the optimum value according to the amount of forward movement of the drill, so that the side wall where the taphole is provided can be accurately and surely penetrated to open the taphole. It can be opened.

<< Example >> Hereinafter, a suitable example of a taphole opening device concerning the present invention is described with reference to an accompanying drawing.

First, a schematic structure of a tap hole punching device of the present invention will be described with reference to FIG. 1. The device of the present invention is a boom device 10 and a tap hole punching machine 20 attached to the tip of the boom device 10.
And a limit switch LS1 which is a position detecting means arranged near each movable element of the boom device 10 and the taphole opening machine 20.
~ LS9 and signals from these limit switches LS1 to LS9, etc. are taken in to control the drive of each movable element.
And a control unit 40 having solenoid valves So11-19.

The boom device 10 is configured such that a swing motor M1 is arranged in a boom 12 whose rear end is pivotally attached to a support member 11 so as to be swingable, and is driven to swing by the swing motor M1. ing. Also, limit switches LS1 to LS4, which are position detecting means, are arranged in proximity to the rear end of the boom 12.
The detection signals of these limit switches LS1 to LS4 are
It is adapted to be taken into the first to fourth solenoid valves So11 to 14 in 40. And this tap hole opening machine 20
Is rotatably attached to the tip of the boom device 10, and can be three-dimensionally moved by the boom device 10.

The tap hole punching machine 20 is provided with a main frame 21, a hanger frame 22 and a link frame 23 that are swingably attached to the lower side of the main frame 21, and vertically movable through these frames. And a guide cell 24.

A host drive motor is installed at the rear end of the main frame 21.
M2 is provided, and the hanger frame 22 is attached to the hoist (not shown) driven by the hoist drive motor M2.
The lower ends of the hanger frame 22 and the guide cells 24 are vertically moved by driving the hoist drive motor M2. A hook 27 connected to the first air cylinder 26 is swingably arranged on the rear side of the main frame 21, and a protrusion 22a is formed in the center of the side surface of the hanger frame 2. Engageable. That is, at the raised position of the hanger frame 22, the hook 27 and the protrusion 22a are engaged with each other to stably maintain the raised position. The hoist drive motor M2 and the hook 27 are connected to each other in the first
The air cylinder 26 is driven by limit switches LS5 to LS7 arranged at predetermined positions on the side of the main frame 21 and fifth to seventh solenoid valves which receive detection signals supplied from the limit switches LS5 to LS7. It is designed to be driven by So15 ~ 7.

On the other hand, a second air cylinder 28 is arranged at the tip of the main frame 21, and the drive rod 28 of this air cylinder 28 is
a is linked to the link frame 23. And
The second air cylinder 28 is controlled and driven by the rimid switches LS8, LS9 and the eighteenth and nineteenth solenoid valves Sol18, 19 which are located close to a predetermined position. It is designed to make fine adjustments to the positioning of the 24 tips. That is, the hacker 29 provided at the tip of the guide cell 24 is engaged with the hacker stopper 30 provided at a predetermined position on the side surface of the blast furnace.

Further, at the lower rear end of the guide cell 24, a percussion machine 31 and a reverse percussion machine 32 are arranged, and the percussion machine 31, the reverse percussion machine 32 is provided with a drill 33 or a striking metal rod made of tungsten carbide. It is arranged to be removable. The drilling drill 33 has a striking gold rod arranged at the rear end of the guide cell 24 and the eighth and ninth solenoid valves S in the control unit 40.
The feed motor M3 linked to ol8, 9 is designed to move forward and backward, that is, the feed motor M3.
The digging drill 33 and the like are connected by a worm gear (not shown), and when the feed motor M3 rotates forward, it moves forward, and when it rotates backward, it moves backward. And the moving speed is the 14th solenoid valve So
controlled by l14. Further, the on / off and rotation speed of the drill 33 are controlled and driven by the twelfth and sixteenth solenoid valves Sol12, 14, and the on / off of the hitting and reverse hitting of the hitting rod and its strength are the tenth, the eleventh and the tenth. It is controlled and driven by 15 solenoid valves Sol10,11,15. In addition, the tap hole drilling machine 20 has a drilling drill.
33, equipped with means for detecting the amount of forward movement of the striking metal rod, and by the signal from the detecting means, the drilling drill 33, solenoid valves Sol10 to 12, 15, 16 on
It is designed to be driven off. As the forward movement amount detecting means, for example, since the movement amount of the excavating drill 33 is determined by the rotation speed of the feed motor M3, the rotation speed is directly measured, or the rotation speed and the rotation time are detected. There is a means.

Further, in this embodiment, the guide cell 24 is provided with a central hole for ejecting air, and the central hole is connected to the thirteenth solenoid valve Sol13. Then, by turning on the thirteenth solenoid valve Sol13, air can be blown out from the hollow hole to blow out the excavated layer.

In addition, the control unit 40 controls the first to seventh tap hole opening machine 20,
The first control unit consisting of 18, 19 solenoid valves Sol1-7, 18, 19 and the eighth-13, 14-16 solenoids for controlling the operation of the drilling drill 33 attached to the tap hole opening machine. It has a second control unit composed of valves Sol8 to 13,14 to 16 and a thirteenth solenoid valve Sol13 for controlling the above-mentioned blow drive, and further, a seventeenth solenoid valve So117 serving as a base plug.
The 17th solenoid valve Sol17
By turning off, the entire control unit 40 can be turned off. Further, the seventeenth solenoid valve Sol17 is linked to a drive button PS, and this activation button PS is adapted to be driven by wireless operation.

In addition, each solenoid valve of the second control unit is a drill
Parameter storage means for storing data such as optimum rotation speed and movement speed corresponding to the forward movement amount of 33 etc. as parameters, and data stored in this parameter storage means and data sent from the movement amount detection means. It is connected to a computer (not shown) having a comparison means for comparing. Then, each solenoid valve of the second control section is controlled and driven by this computer so that the excavation work can be performed accurately.

Next, the operation of this embodiment will be described.

First, FIG. 2 shows a flowchart for setting the taphole opening machine 20 at a predetermined position before the blast furnace. That is, by turning on the start button PS, the seventeenth solenoid valve Sol17 is turned on and the control unit 40 is driven (step 101). Then, after a certain time-out (play time) (step 102), from step 103
The operation of 107 completes the positioning in the lateral direction (turning direction). At this time, at the beginning of turning of the tap hole opening machine 20, the turning is performed at a high speed and then at a slow speed to weaken the inertial force in the turning direction, the turning is instantaneously stopped, and more accurate positioning can be performed. It is like this.

Next, after a predetermined timeout (step 108),
While raising the rear end of the hanger frame 22, the first
The cylinder 27 shown in the figure is extended, the hook 26 is removed, and the hanger frame 22 and the guide cell 24 are set in a free state (steps 109 to 113). Then, the hoist is lowered, the lower end portion of the hanger frame 22 and the rear end portion of the guide cell 24 are lowered to the lowermost end portion (steps 114 to 117), and further, the second air cylinder 28 is contracted. The positioning set is completed by turning 23 downward and engaging the hacker 29 provided on the guide cell 24 with the hacker stopper 30 (steps 118 to 120).

When the positioning set is completed, the taphole opening machine 20 is arranged as shown in FIG.

Next, the operation of opening the taphole of the blast furnace will be described with reference to the flowcharts shown in FIGS.

First, the primary excavation is performed with the excavation drill 33 provided in the guide cell 24 (steps 201 to 211). That is, the start button is turned on, the feed motor M3 is advanced at a high speed, and the drill is moved forward to the position L1 near the side wall 50 of the blast furnace (steps 201 to 203). Next, rotate and advance slowly so that the excavation position does not shift, and blow to remove the excavation layer and excavate to a predetermined depth L2 to form a countersink (steps 204 and 205), then rotate and advance speed. At the highest point, and the sidewall 50 is drilled all at once to the intermediate depth L3 (steps 206 and 207). Then, while rotating the rotation speed or the like to a weak rotation, the feed motor M3 is reversely rotated to retract the drilling drill 33 to the initial position at once, and all rotations, backward movements, etc. are stopped (steps 208 to 2).
11). This completes the first excavation.

Next, by the rod step, the drill 33 is removed, and the gold rod is attached and replaced below the guide cell 24 (step 212).

Then, a second excavation is performed using the gold rod to penetrate the side wall 50 of the blast furnace (steps 213 to 227). That is,
By turning on the start-up button again, it is moved at a high speed all the way to the position L1 near the side wall 50 of the blast furnace at the same time as in the case of the above-mentioned first excavation, and then is moved forward at a constant speed while performing a slight impact or blow. After moving to the countersink position L2 in the primary excavation, the gold rod is accurately inserted and arranged in the hole formed in the primary excavation (steps 213 to 217). Then, only the forward moving speed of the gold rod is increased to move it to the position L4 near the deep part of the hole formed in the first excavation (steps 218, 219). next,
After the excavation is performed at a low moving speed again and after forming the counterbore (up to L5) in the second excavation, all are switched to high-speed operation, and the inner part L6 of the side wall 50 is punched out at once and penetrated (steps 220 to 223). . Then, after penetrating, once all the operations are stopped, then the feed motor M3 is rotated in the reverse direction, and by performing high-speed reverse impact, the gold rod is retracted all the way to the initial position, and reverse impact, backward movement, etc. are all stopped. (Steps 224 to 227). As a result, the second excavation is completed, and the tap hole can be opened at a predetermined position on the side wall 50 of the blast furnace.

After the completion of the hole opening work, the initial state, namely,
The hook 27 provided on the main frame 21 and the projection 22a provided on the cover frame 22 are engaged with each other, the guide cell 24 is fixed to the main frame 21, and the boom 12 is pivoted and returned to its original position. It is. The specific procedure is
Flowchart for setting the tap hole opening machine described above (Fig. 2)
Since the procedure can be performed in the reverse order of, the detailed description will be omitted.

Although the limit switch is used as the position detecting means in the above embodiment, the present invention is not limited to this.
A position sensor and various other types can be used, and as a means for detecting the amount of forward movement of an excavating drill or the like, for example, a sonar using a long sound wave or the like and other various types can be used.

Further, in the above embodiment, the drive button is turned on wirelessly, but it goes without saying that it may be operated directly by wire.

<< Effects of the Invention >> As described above, the taphole opening device according to the present invention controls the position detecting means and the drive of the taphole opening machine based on the detection signal supplied from the position detecting means. By providing the first control means, once the apparatus is operated, the taphole opening machine can be automatically and accurately positioned at a desired taphole position.

Further, also in the excavation work, a means for detecting the amount of forward movement of the excavating drill or the like is provided, and a second control means for controlling the number of revolutions, the moving speed of the forward movement or the like is provided in accordance with the amount of forward movement of the excavating drill or the like. Therefore, at the beginning of the excavation, the excavation can be performed by performing the excavation while operating at a low speed with accurate positioning, and thereafter, the excavation work can be performed in a short time by the high speed operation. Further, it is possible to accurately form a hole having a predetermined depth in the first excavation, which has conventionally depended exclusively on the intuition of the operator, and the hole formed in the first excavation can be completely formed in the second excavation. Even when penetrating,
Since the position of the deep part of the hole can be accurately searched,
In the second excavation as well, the excavation work can be performed while accurately positioning the same as above.

As a result, when opening the taphole of the blast furnace, skill is not required, individual differences can be eliminated, and even if it is away from the excavation site, it can be performed accurately and easily.

[Brief description of drawings]

FIG. 1 is a block diagram showing the outline of an embodiment of the taphole opening device of the present invention, FIG. 2 is a flow chart of positioning setting of the taphole opening machine, and FIG. 3 is a drawing of the taphole opening machine. FIG. 4 is a side view showing the positioned state, FIG. 4 is an excavation flow chart of the tap hole punching machine, and FIG. 5 is a retracting flow chart of the tap hole punching machine. 10 …… Boom device, 20 …… Tap hole opening machine 33 …… Drilling drill, 40 …… Control unit LS1-9 …… Limit switch

Claims (1)

[Claims] Claim: What is claimed is: 1. A tap hole punching device comprising a swingable boom device and a tap hole punching device rotatably attached to a tip of the boom device, the position of the tap hole punching device. And a first control means for moving, positioning and retracting the tap hole opening machine with respect to the tap hole according to a position signal of the tap hole opening machine detected by the detecting means. A parameter storage means for storing, as parameters, the rotational speed and the striking force corresponding to the forward movement amount of the excavating drill or the gold rod attached to the tap hole opening machine; and a movement amount detection means for detecting the forward movement amount. Comparing means for comparing the value detected by the movement amount detecting means with the value stored in the parameter storing means, and outputting according to the parameters of the rotational speed and the striking force of the perforator detected by the comparing means. Controls the open mouth machine Taphole opening apparatus characterized by comprising a second control means that.