JPH09272043A - Hydraulic iron spout hole opening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately quickly and easily obtain a good stably spoutable iron spout, by providing a pressure adjuster increasing or decreasing a drive oil pressure of a hydraulic drifter by an output signal of a cut hole speed comparison arithmetic device of a cut hole speed setting controller. SOLUTION: In a cut hole speed comparison arithmetic device 46 provided in a cut hole speed setting controller 30, intensity of a received cut hole speed signal is made into a value, after a level is made equivalent to a cut hole speed setting value making intensity of an electric signal, received from a cut hole speed setter 32, into a value, when a time is counted in a timer, a mean value for a fixed time is calculated, this value serves as the actual cut hole speed measured value. Next, the cut hole speed measured value is compared with a level of the cut hole speed setting value, an electric signal is transmitted to a striking hydraulic pressure adjuster 20, a drive oil pressure of a hydraulic drifter is increased or decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic tap hole opening device for opening a tap hole of a blast furnace.

[0002]

2. Description of the Related Art As shown in FIG. 8, a conventional tap hole opening device 150 applies a striking force and a rotating force to a bit 12 by an air drifter 37 which uses compressed air as a driving source, and an air motor 38. A feed force is applied to the air drifter 37 to open the tap hole 36. The operation of the tap hole opening device 150 is performed by a manual air switching valve (not shown) or an air switching solenoid valve operated by a push button (not shown). For example, when hitting the air drifter 37, air switching is performed. One of the three levels of striking force: strong, medium, and weak with the valve stopped.
The driver selects and operates the air drifter 37
Regarding the rotation of No. 3, the driver selected one of the three levels of the rotational force strength of strong, medium, and weak to stop the operation. It should be noted that the high, medium, and low levels of operation mean increasing or decreasing the flow rate of compressed air.

Further, as a new technique of the tap hole opening device, in Japanese Utility Model Publication No. 57-18420, a feed force for advancing and retracting the body of the hole making machine, a rotating force of a hole forming metal rod, and a hammer impact. A new technique for automatically adjusting forces individually has been disclosed. To give a concrete example of a part of the device of this technology, the automatic adjusting device for the rotational force sets the flow rate of the compressed air for driving the rotating air motor in advance, and The measured value of the flow rate is compared with the set value, and control is performed so as to match the set value. Further, according to this technique, the human error in the tap hole opening work (or called the hole opening work or drilling work) is eliminated, and the good tap hole 36
It is said that can be obtained accurately, quickly and easily.

[0004]

However, the conventional tap hole opening device 150 and the above-mentioned "Jitsuko Sho 57-18" are used.
The technique described in Japanese Patent No. 420 has the following problems to be solved. The portion to be opened (or called a hole) by the tap hole opening device 150 is a high-pressure filling of the tap hole 36 with a mud gun of an irregular shaped refractory called mud at the end of tapping. The subsequent mud is baked and hardened by the high heat in the blast furnace. The length of the mud from the inside of the furnace to the outside of the furnace is about 3 m, but the temperature distribution is about 1500 ° C. inside the furnace and about 200 ° C. outside the furnace. The hardness and strength of mud after firing depend on the firing temperature,
If the baking temperature is high, it is hard and strong, and if the baking temperature is low, it is soft and weak. The hardness and strength of the mud after firing depend on the firing temperature as well as the firing temperature. The longer the firing time, the harder and stronger the harder, and the shorter the firing time, the softer and weaker the mud becomes. That is,
The hardness and strength of the pierced mud vary with both location and timing of piercing.

The structure of the furnace wall 35 after being opened has a thin cylindrical refractory layer 35a which is worn and renewed at each tapping, and is not renewed outside the innermost layer. It is surrounded by the furnace wall refractory 35b. The tap hole 36 formed by the innermost thin cylindrical refractory layer 35a.
The hole diameter and the hole length are required for stable tapping of the blast furnace and stable tapping is required, but the boundary surface between the thin cylindrical refractory layer 35a and the furnace wall refractory 35b has an adhesive strength. Since it is not strong, when the hole is forcibly drilled at the time of opening, there arises a problem that the entire cylindrical refractory layer 35a is broken (hereinafter referred to as hole breakage). When the hole is broken, the taphole 36 (this is called a failure to open the hole) cannot maintain stable tapping, and therefore must be immediately closed with a mud, which causes an obstacle in tapping work.

A physical phenomenon in drilling the mud of the furnace wall 35 is to apply a striking force to the bit 12 so that the blade of cemented carbide protruding from the tip of the bit 12 has a constant depth of the furnace wall 3
As a result, the mud of the furnace wall 35 is crushed into rocks at a certain depth and within a certain range by the action of pushing the blade. Due to the rotation applied to the bit 12 at the same time as the impact, the mud of the furnace wall 35 crushed by the impact is sheared, separated, and removed, and the drilling proceeds. The magnitude of the striking force applied to the bit 12 during this drilling action is proportional to the amount of the mud of the furnace wall 35 crushed by the blade of the bit 12 (crushing depth × crushing range), and the furnace wall It is known that the hardness of the mud of 35 and the amount of mud of the furnace wall 35 crushed by a constant impact force are in inverse proportion.

Under the above conditions, when the tap hole 36 is opened, the soft and weak mud outside the furnace will be broken unless it is drilled with a small striking force, and the hard and strong mud inside the furnace will be hit hard. It can be seen that it will be difficult to open the hole if you do not drill with force, but as mentioned above, the degree of hardness and softness of the mud depends on the firing time as well as the location, and the degree of hardness and softness is grasped on site. Since there was no means to do so, it was difficult to standardize the method of applying the impact force in the drilling work, and the experience and intuition (or skill) of the tap hole drilling operator (or the drilling operator, operator) ). For this reason, it is difficult to always perform good drilling using the tap hole punching device 150 of the related art, and drilling failures such as hole breakage occur at a constant rate.

In the technique disclosed in Japanese Utility Model Publication No. 57-18420, the turning force, the striking force, and the feeding force applied at the time of boring are preset and automatically controlled. It is possible to realize a hole and eliminate the human difference in the opening work. However, as mentioned above, a method of drilling a mud that is soft and weak outside the furnace and hard and strong inside the furnace and changes in hardness, softness, and strength depending on the firing time as well as the location is constant force. Since it is not the most suitable drilling method because it is not adaptable to mud property changes, the new technology described above is not the optimum tapping hole drilling device that can prevent drilling failure. It seems that it has not arrived.

On the other hand, since the mud to be opened as described above has a high temperature of about 1500 ° C. inside the furnace, when drilling a high temperature mud with the bit 12, the bit 12 is heated and softened to a high temperature, and the bit is softened. There is a situation in which the hole 12 does not proceed even if the hole 12 is crushed and the hole drilling work is continued. This unpierceable situation occurs in a special case where the hot metal in the furnace is mixed in the mud, but when it is impossible, the drilling is immediately stopped and the crushed bit 12 is replaced with a sound product. Therefore, it is necessary to restart the opening work. Conventionally, the inability to open the hole has been judged by the visual judgment of the operator, and therefore the human error cannot be eliminated.

The present invention has been made in view of such circumstances, and a small number of measuring means and control means eliminates human differences in tapping hole opening work and enables stable tapping. It is an object of the present invention to provide a low-cost hydraulic tap hole opening device capable of accurately, quickly and easily obtaining

[0011]

According to the present invention, there is provided a semiconductor device comprising:
The hydraulic taphole opening device described is a hydraulic taphole opening device for opening a taphole by applying a striking force and / or a rotational force to a bit by a hydraulic drifter using hydraulic pressure as a drive source. Comparing the output signal of the hole speed measuring device for measuring the hole speed, the hole speed setting device for setting the hole speed in advance, and the output signal of the hole speed measuring device and the hole speed setting device The driving hydraulic pressure of the hydraulic drifter is increased or decreased according to the output signal of the drilling speed setting control device having a drilling speed comparison calculator for calculating and the drilling speed comparison calculator of the drilling speed setting control device. And a pressure controller for controlling the pressure.

Further, the hydraulic tap hole opening device according to claim 2 is the hydraulic tap hole opening device according to claim 1, wherein
A drilling speed setting device for setting a drilling speed in advance, a drilling speed comparison computing device for performing a comparison calculation of an output signal of the drilling speed measuring device and an output signal of the drilling speed setting device, and the drilling speed When the measured drilling speed measured by the setting device is lower than the preset drilling speed setting value for the drilling speed setting device, it is activated by the output signal of the drilling speed comparison calculator to reduce the drilling speed. An elapsed time measuring device for measuring the duration of the state, an elapsed time setting device for setting an allowable duration of the drilling speed reduction state in advance, an output signal of the elapsed time measuring device and an output signal of the elapsed time setting device When the duration of the drilling speed reduction state measured by the elapsed time comparison calculator and the elapsed time measuring device exceeds the allowable duration preset in advance by the elapsed time setting device, the drilling work is performed. And a drive stop device for stopping And a hole stop setting control device.

The characteristics of the hydraulic type taphole opening device for opening the taphole by applying a striking force and a rotating force to the bit by means of a hydraulic drifter using hydraulic pressure as a driving source are as follows. The output and the driving hydraulic pressure are accurately proportional to each other, there is little solid difference between machines, and the hydraulic pressure can be measured and controlled easily and accurately. Further, the maximum output of striking force and rotational force is about twice that of the air drifter, and the optimum drilling output corresponding to the hardness and softness of the mud can be accurately and widely applied and controlled. The precondition was the use of a pig-hole punch.

In the hydraulic tap hole punching device according to claim 1 of the present invention, a mud hard / soft softening device is provided in the drilling speed setting control device provided in the control device of the hydraulic tap hole punching device having the above characteristics. , The optimum drilling speed value corresponding to strength is set, particularly below the limit at which hole breakage does not occur, and drilling is started by a push button command for starting drilling. At the start of drilling, it shall be specified that the drilling should start from the point where no impact force is applied.After that, the drilling speed measuring device provided in the hydraulic tap hole drilling device continuously measures the drilling speed. The measured value is converted into an electric signal and sent to the control device. The control device compares the received drilling speed measurement value and the drilling speed setting value of the drilling speed setting device with a comparison calculator, and strikes so that the actual drilling speed matches the drilling speed setting value. It controls a pressure regulator, for example a hydraulic pressure control valve, provided in the hydraulic line driving the force.

The rotation of the bit and the feed of the drifter may be performed by constantly applying a force and speed above a certain level with respect to the drilling function, so a certain hydraulic pressure and a certain amount of oil supply are set by a manual valve. In addition, if the hydraulic percussion machine is constantly supplied with a certain amount of oil supply, its output (that is, the impact force and the number of impacts) shows a correct proportional relationship only by the oil supply pressure, so set a certain amount of oil supply with the manual valve. I'll do it.

As described above, the hydraulic tap hole punching device of the present invention feedback-controls the drilling speed so as to always match the drilling speed setting value, so that the mud is always at a constant speed regardless of hardness or softness. Drilling can be performed. This is
The soft and weak mud outside the furnace will break if it is not drilled with a small impact force, and the hard and strong mud inside the furnace will be difficult to open if it is not drilled with a large impact force. Since the device itself of the hydraulic tap hole opening device of the invention is a means for solving it, human error in opening work is eliminated, and a good tap hole capable of stable tapping is accurately, quickly and easily. It has the effect of opening holes.

Next, the important thing is that even if the device is rational as a system, if the boring speed setting value set in the device in advance is not appropriate, it will cause a failure in drilling. How to understand the preset value that does not cause failure of drilling is especially important in the case of drilling mud that changes in hardness, softness and strength depending on the location and the firing time. It is difficult, and moreover, the above-mentioned "Jitsuko Sho 57-" which realizes drilling with a constant force by the above-mentioned automatic control.
In the technology described in Japanese Patent No. 18420, there are three preset values (variables) (rotational force, striking force, feed force), so it is optimal even if the actual results of hole opening are accumulated and the data is analyzed. It is considered very difficult to grasp such preset values. In this regard, since the preset value (variable) of the hydraulic tap hole punching device of the present invention is only one of the drilling speed, it is easily correct by analyzing the actual drilling data in the actual furnace. It has the feature of finding preset values.

In the hydraulic tap hole punching device according to the second aspect of the present invention, the drilling speed setting value and the low level of the drilling stop setting control device provided in the control device are set at a low level assuming bit crushing. The permissible value of the elapsed time of the drilling speed is set, and the drilling is started by the command of the push button for starting the drilling. After the start of the drilling, the drilling speed measuring device provided in the hydraulic tapping device continuously measures the drilling speed, converts the measured value into an electric signal and sends it to the control device. The control device compares the received drilling speed measurement value and the drilling speed setting value set in the drilling speed setting device, and the drilling speed measured value is below the drilling speed setting value,
In addition, when the measured value of the elapsed time at the time of drilling exceeds the set value of the elapsed time setter, the drive stop device issues a drilling work stop command (or a drilling work stop command) and automatically outputs hydraulic pressure. Stop the driving of the pig-hole opening device.

As described above, in the hydraulic tap hole opening device of the present invention, the actual drilling speed is always fed back, and the elapsed time set value is compared with the drilled speed set value assuming bit crushing. Since the stop of the drilling work is controlled, it is possible to eliminate the human error in the determination of the bit collapse in the tapping hole drilling work and to eliminate the wasteful and unreasonable continuation of the drilling work.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. FIG. 1 is an explanatory view showing the constitution of the hydraulic tap hole punching device according to claim 1 of the present invention, and FIG. 2 is the constitution of the drilling speed setting control device of the hydraulic taphole punching device. And FIG. 3 and FIG. 4 are flow charts showing the operating method and operation of the hydraulic taphole opening device.

As shown in FIGS. 1 and 2, in a hydraulic tap hole opening device 10 according to claim 1 of the present invention, a striking force and a rotating force are applied to a bit 12 by a hydraulic drifter 13 using hydraulic pressure as a drive source. In addition, a hydraulic motor for driving the drifter feed (hereinafter referred to as a hydraulic motor) 14 applies a feed force to the hydraulic drifter 13 to open the taphole 36. The hole-drilling speed measuring device 23 for measuring the hole-drilling speed, the hole-drilling speed setting device 32 for setting the hole-drilling speed in advance, and the output signal of the hole-drilling speed measuring device 23 and the output signal of the hole-drilling speed setting device 32 are compared and calculated. A drilling speed setting control device 30 having a drilling speed comparison calculator 46,
A percussion hydraulic pressure regulator 20 for increasing or decreasing the percussion hydraulic pressure of the hydraulic drifter 13 according to an output signal of the perforation speed comparison calculator 46 of the perforation speed setting control device 30. Hereinafter, these will be described in detail.

The impact hydraulic pressure supply pipe 19 of the hydraulic drifter 13 is provided with an impact hydraulic pressure pressure controller (or a hydraulic pressure regulation valve for impact) 20 and a manual flow rate adjusting valve 21. A manual pressure adjusting valve 27 and a manual flow rate adjusting valve 28 are provided. Here, the percussion hydraulic pressure regulator 20 has an automatic control mechanism in the valve itself for instructing the hydraulic pressure adjustment value by the strength of the input current and controlling the hydraulic pressure so as to match the instruction value. The electromagnetic proportional pressure reducing valve is used.

The hydraulic drifter 13 is supported by the drifter feeding device 11. The drifter feeding device 11 is composed of a hydraulic motor 14, a drive chain wheel 15, a chain 16, a lifter carriage 17, and a guide cell 18, and a hydraulic supply pipe 2 for the hydraulic motor 14 is provided.
2 is provided with a manual pressure adjusting valve 24, a manual flow rate adjusting valve 25 and a hydraulic flow meter 23 capable of transmitting a hydraulic flow rate by an electric signal. In this configuration, the drilling speed is equal to the drifter forward feed speed during drilling, the feed speed is proportional to the rotation speed of the hydraulic motor 14, and the rotation speed of the hydraulic motor 14 is substantially proportional to the hydraulic supply flow rate. Therefore, since the hydraulic flow rate measured by the hydraulic flow meter 23 is a proportional value of the drilling speed, the hydraulic flow meter 23 is used as a drilling speed measuring device. In FIG. 1, reference numeral 34 is a hydraulic unit.

A drilling speed setting controller 30 is provided in the controller 29 of the hydraulic tap hole opening device 10. The drilling speed setting controller 30 uses, for example, a programmable controller (or simply PC), and the functional configuration thereof is as shown in FIG.
And the hole speed setting device 32 and the hole speed measuring device 2
3, receiving functions 40, 41 of the electric signal transmitted from 3 and converting functions 42, 43 for converting both received electric signals into numerical values
After comparing the levels of the two numerical values, a comparison calculation function (or a drilling speed comparison calculation unit) 46 for comparing the magnitudes of the two values and outputting the result, and inputting the comparison calculation result In order to increase or decrease the actual drilling speed, a transmission function 47 for transmitting the hydraulic pressure adjustment instruction value as an electric signal to the percussion hydraulic pressure regulator 20 is provided.

Next, the operating method and operation of the hydraulic tap hole opening device 10 according to the first aspect of the present invention constructed as described above will be described with reference to FIGS. 3 and 4. Before the start of the drilling work, the drilling speed setting device 32 provided in the drilling speed setting control device 30 sets an optimum drilling speed setting value (not more than the limit that does not cause hole breakage), which corresponds to the hardness and softness of the mud, B)
And the calculation cycle used for obtaining the average value of the drilling speed within a fixed time T _{1 for} which the drilling speed setting control device 30 continues drilling without applying a striking force at the start of drilling. The time T ₂ is set (S1). Next, the hydraulic tap hole opening device 10 is moved to an opening position and stopped by an opening device retreat device (not shown), the tip of the bit 12 is pressed against the mud of the furnace wall 35, and then the start of opening is pushed. Opening is started by a button command (S2).

At the time of starting the drilling, the controller 29 is controlled so that the drilling is performed only by the rotation and the feeding (or the forward movement) without applying the striking force for the time T ₁ designated by the drilling speed setting controller 30. With this configuration, a timer T1 (not shown) is started by a push button command to start opening (S3). The time-up of the timer T1 is checked (S4), and when the time is up, the impact on the hydraulic drifter 13 is started (S4).
5) At the same time, start timer T2 (S
6). After that, the drilling speed measuring device 23 provided in the hydraulic tap hole drilling device 10 continuously measures the drilling speed, converts the measured value into an electric signal, and sends it to the drilling speed setting control device 30 (S7). ).

The drilling speed comparison calculator 46 provided in the drilling speed setting controller 30 digitizes the strength of the drilling speed signal received, and calculates the strength of the electric signal received from the drilling speed setting device 32. When the timer T2 has timed up after categorizing the numerically set drilling speed setting value (B) and the level (S8),
An average value for a certain period of time (that is, time T ₂ seconds) is calculated, and this is used as an actual drilling speed measurement value (A) (S9). Next, the magnitudes of the measured hole drilling speed (A) and the hole drilling speed set value (B) are compared (S10). Here, if the drilling speed measurement value (A) is smaller than the drilling speed setting value (B) (A <
B) The hydraulic pressure adjustment instruction value is increased to increase the drilling speed (S11), and if the drilling speed measurement value (A) is larger than the drilling speed setting value (B) (A> B), the drilling speed is changed. In order to lower the hydraulic pressure adjustment instruction value (S13), if the drilling speed measured value (A) and the drilling speed setting value (B) are equal (A = B), the hydraulic pressure is adjusted to maintain the drilling speed as it is. In order to maintain the adjustment instruction value (S12), an electric signal is transmitted to the percussion hydraulic pressure regulator 20 to increase or decrease or maintain the hydraulic pressure.

During drilling, the operator visually confirms the drilling condition (S14). If the drilling speed is not penetrated, the control loop for adjusting the hydraulic pressure for striking from the reception of the drilling speed measurement value (A) is instantaneously cycled. By repeating this operation, this device feedback-controls the drilling speed so that it always matches the drilling speed setting value (B), so it is possible to perform drilling at a constant drilling speed regardless of whether the mud is hard or soft. Can be done. When the operator confirms that the hole has penetrated, the pull-out start push button is turned on.
By doing so (S15), the bit 12 is pulled out, the hydraulic tap hole opening device 10 is evacuated from the front of the tap hole 36 (S16), and the opening work is completed.

In the present embodiment, the case where only one drilling speed setting value is set for a mud length of about 3 m from the outside of the tap hole 36 to the inside of the furnace is shown. Tap hole 36 in order to perform drilling that better adapts to changes in
It is also possible to divide the mud length of about 3 m into several zones and set the drilling speed setting value for each zone. In this case, in addition to the above-described embodiment, the drilling depth (that is,
It is necessary to provide a measuring transmitter for the forward movement distance of the drifter from the drilling start position and to provide the drilling speed setting devices 32 in the number corresponding to the number of divided zones.

Hydraulic motor 1 of the drifter feeding device 11
Since the hydraulic flow rate measured by the hydraulic flow meter 23 of No. 4 is a proportional value of the drilling speed, the integrated value of the hydraulic flow rate from the start of the drilling is the proportional value of the drilling depth. By additionally installing the hydraulic flow rate integration function in the drilling speed setting control device 30, the function of the drilling depth measuring device is provided.

Each of the plurality of drilling speed setting devices 32 is set with a range of the drilling depth of a zone in charge thereof and a drilling speed setting value applied to the zone. The current position of the drilling depth is calculated using the signal of
Drilling speed setter 3 in charge of the zone corresponding to the current position
It is also possible to perform drilling by changing the drilling speed for each zone by sequentially repeating the selective use of 2.

Further, although the drilling speed measuring device 23 of the above-mentioned embodiment has shown the example in which the hydraulic flow meter 23 of the hydraulic motor 14 is used, the present invention is not limited to this, and the position driven by the drifter feed drive system, for example. It is also possible to use a continuous oscillator (or encoder) or the like.

Next, a hydraulic tap hole opening device 10 'according to claim 2 of the present invention will be described with reference to FIGS. As shown in FIG. 1 and FIG. 5, claim 2 of the present invention
A hydraulic tap hole punching device 10 ′ according to the present invention is provided with the drilling speed measuring device 23 in the hydraulic tap hole punching device 10 according to claim 1 of the present invention, as well as the control device 29. Is
A drilling stop setting control device 31 is provided. The drilling stop setting control device 31 is assumed to use, for example, a programmable controller, and its functional configuration is a drilling speed setting device 33 that sets a low level drilling speed assuming bit crushing,
Receiving functions 50, 51 of electric signals transmitted from the hole speed setting device 33 and the hole speed measuring device 23, and converting functions 52, 53 for converting both received electric signals into numerical values.
After categorizing the levels of both numerical values, the comparison calculation function (or called a drilling speed comparison calculator) 56 that compares the magnitudes of both numerical values and outputs the result, and the drilling speed measurement with the result of the comparison calculation When the value is lower than the drilling speed setting value, a timer function (or a timer T4) including an elapsed time measuring device for measuring the elapsed time and a drilling speed setting device for setting the drilling speed in advance
57) and the above state exceeds the elapsed time set value set in the timer function 57, a comparison calculation function (or an elapsed time comparison calculator) that issues a drilling operation stop command.
59 and a drive stop function (or drive stop device) 58 for stopping the drive of the hydraulic tap hole opening device 10 '.

Next, the claims of the present invention constructed as described above
Operation method and operation of hydraulic taphole opening device 10 according to item 2.
This will be described with reference to FIGS. 6 and 7. Opening work
Before starting, the drilling speed setting device 33 provided in the control device 29.
(Timer T3) Low level shaving assuming bit crushing
The hole speed setting value (C) and the tapping stop setting control device 31
Allowing the elapsed time for low level drilling speed to the Immersion function 57
Set value T_FourAnd the average value of drilling speed for a certain time
Calculation cycle time T used for_ThreeIs set (S17).
Move the hydraulic tap hole opening device 10 to the opening position and stop it.
And pressed the tip of the bit 12 against the mud of the furnace wall 35.
After that, the opening is started by the push button command (S18) to start the opening.
At the same time (S19), the timer T4 is reset (S2
0). After opening the holes, start timer T3 (S2
1), calculation cycle time T _ThreeUntil the time is up
Drilling speed measuring device 23 provided in the type tap hole drilling device 10 '
To continuously measure the drilling speed and send the measured value as an electrical signal.
And sends it to the drilling stop setting control device 31 (S2
2).

When the timer T3 times out (S2
3), the drilling stop setting control device 31 digitizes the strength of the received drilling speed signal, and digitizes the strength of the electric signal received from the drilling speed setter 33. After categorizing the level with C), a certain time (ie T
The average value for ₃ seconds) is calculated, and this is used as the actual drilling speed measurement value (A) (S24). Next, hole speed measurement value (A)
And the magnitude of the drilling speed setting value (C) are compared (S25). Here, if the drilling speed measured value (A) is larger than the drilling speed setting value (C) (A> C), the control loop is repeated by returning to before the timer T4 reset, but the drilling speed measured value (A) Is smaller than the drilling speed setting value (C) (A <
C) A measuring device for measuring the elapsed time, for example, a timer T
4 is started (S26).

The time-up of the timer T4 is checked (S27). If the time is not up, the timer T3 is checked.
Although the control loop is repeated by returning to the state before the start, when the state of (A <C) exceeds the elapsed time set value set in the timer T4, the drilling stop setting control device 31 determines that bit collapse has occurred. A judgment is made and an electric signal of a drilling work stop command is transmitted, and at the same time, the driving of the hydraulic tap hole opening device 10 'is stopped (S28). During drilling, the operator visually checks the drilling status, and the drilling stop setting control device 31
When the driving of the hydraulic tap hole opening device 10 'is stopped,
By turning on the pull-out start push button (S29), the bit 12 is pulled out, and the hydraulic tap hole opening device 10 'is retracted from the front of the tap hole 36 (S30).

In this way, the hydraulic tap hole opening device 1 of the present invention
0'returns the actual drilling speed at all times, compares the drilling speed set value assuming bit crushing with the allowable value of the elapsed time, and repeats the control loop for transmitting the drilling work stop in an instantaneous cycle. As a result, it is possible to eliminate the human error in the determination of the bit collapse during the tap hole opening work, and to eliminate the wasteful and unreasonable continuation of the hole opening work.

The embodiment of the present invention has been described above.
The present invention is not limited to these embodiments, and all changes in conditions without departing from the gist are within the scope of the present invention.

[0039]

As is apparent from the above description, in the hydraulic tap hole opening device according to the first and second aspects of the present invention,
The following excellent effects can be obtained. That is, since the hydraulic tap hole punching device of the present invention feedback-controls the drilling speed so that it always matches the drilling speed setting value, the drilling is always performed at a constant speed regardless of whether the mud is hard or soft. To do. This means that if the mud outside the furnace is weak and weak, and if it is not drilled with a small impact force, hole breakage will occur, and if the hard and strong mud inside the furnace is not drilled with a large impact force, it will be difficult to open the mud. Since the device itself of the hydraulic tap hole opening device of the present invention solves the characteristic, human error is eliminated in opening work, and a good tap hole can be opened accurately, quickly and easily. Demonstrate the effect of piercing. Since the preset value (variable) of the hydraulic tap hole opening device of the present invention is only one of the drilling speed, the correct preset value can be easily obtained by analyzing the actual drilling data in the actual furnace. Can be found. By using the hydraulic tap hole opening device of the present invention, the tap hole opening operator is relieved from the conventionally required constant monitoring and judgment of the opening condition and the individual operation performed based on the judgment. Then, after issuing the command for the push button to start the opening, the abnormal load is simply monitored and waiting for the opening to be penetrated, the work load is significantly reduced. INDUSTRIAL APPLICABILITY The present invention makes it possible to integrate the control and operation of a plurality of hydraulic tap hole opening devices in a remote location in a blast furnace in which two or more tap holes are installed. It has the additional benefit of reducing the number of workers and improving the working environment by freeing open-hole workers from the hot dust environment. The hydraulic tap hole opening device of the present invention can be realized at a low equipment cost.

Particularly, in the hydraulic tap hole punching device according to the second aspect, the actual drilling speed is always fed back, and there are two sets of the drilling speed setting value and the elapsed time setting value assuming bit crushing. Is used to control the discontinuation of drilling work,
This eliminates the human error in determining the bit collapse during the tap hole opening work, and eliminates the needless and unreasonable continuation of the hole opening work.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a configuration of a hydraulic tap hole opening device according to claim 1 and claim 2 of the present invention.

FIG. 2 is a block diagram showing a configuration of a control device of the hydraulic tap hole opening device according to claim 1 of the present invention.

FIG. 3 is a flowchart showing an operating method and an operation of the hydraulic tap hole opening device according to claim 1 of the present invention.

FIG. 4 is a flowchart showing an operating method and an operation of the hydraulic tap hole opening device according to claim 1 of the present invention.

FIG. 5 is a block diagram showing a configuration of a control device of the hydraulic tap hole opening device according to claim 2 of the present invention.

FIG. 6 is a flowchart showing an operating method and an operation of the hydraulic tap hole opening device according to claim 2 of the present invention.

FIG. 7 is a flow chart showing an operating method and an operation of the hydraulic tap hole opening device according to claim 2 of the present invention.

FIG. 8 is an explanatory diagram showing a configuration of a taphole opening device according to a conventional example.

[Explanation of symbols]

10 hydraulic tap hole opening device 10 'hydraulic tap hole opening device 11 drifter feed device 12 bit 13 hydraulic drifter 14 hydraulic motor 15 chain wheel 16 chain 17 drifter truck 18 guide cell 19 hydraulic supply pipe for hitting 20 hitting Hydraulic pressure controller 21 Manual flow rate control valve 22 Hydraulic supply pipe for drifter feed device 23 Hydraulic flow meter (drilling speed measuring device) 24 Manual pressure control valve 25 Manual flow rate control valve 26 Rotation hydraulic supply pipe 27 Manual pressure control valve 28 Manual flow rate control valve 29 Control device 30 Drilling speed setting control device 31 Drilling stop setting control device 32 Drilling speed setting device 33 Drilling speed setting device (timer T3) 34 Hydraulic unit 35 Furnace wall 35a Refractory layer 35b Furnace Wall refractories 36 Tap hole (opening) 40 Reception function 41 Reception function 42 Conversion function 3 Conversion Function 46 Comparison Calculation Function (Drilling Speed Comparison Calculator) 47 Transmission Function 50 Reception Function 51 Reception Function 52 Conversion Function 53 Conversion Function 56 Comparison Calculation Function (Drilling Speed Comparison Calculator) 57 Timer Function (Timer T4) 58 Drive stop function (drive stop device) 59 Comparison calculation function (elapsed time comparison calculator) T1 timer T2 timer T ₁ hour T ₂ calculation cycle time T ₃ calculation cycle time T ₄ Allowable set value

Claims (2)

[Claims] 1. A drilling speed is measured in a hydraulic tapping device for punching a taphole by applying a striking force and / or a rotational force to a bit by a hydraulic drifter driven by hydraulic pressure. Drilling speed measuring device, drilling speed setting device for presetting the drilling speed, and drilling speed comparison calculation for comparing the output signal of the drilling speed measuring device and the output signal of the drilling speed setting device And a pressure regulator for increasing or decreasing the drive hydraulic pressure of the hydraulic drifter according to the output signal of the drilling speed comparison calculator of the drilling speed setting control device. A hydraulic tap hole opening device characterized in that 2. A drilling speed setting device for setting a drilling speed in advance, and a drilling speed comparison calculator for comparing and calculating an output signal of the drilling speed measuring device and an output signal of the drilling speed setting device. , The drilling speed measurement value measured by the drilling speed setting device is
When the drilling speed setting value set in advance in the drilling speed setting device is lower than the preset drilling speed setting value, an elapsed time measuring device which is activated by the output signal of the drilling speed comparison calculator and measures the duration of the drilling speed decreasing state, , An elapsed time setting device for setting an allowable duration of the drilling speed reduction state in advance, and an elapsed time comparison calculator for performing a comparison calculation of the output signal of the elapsed time measuring device and the output signal of the elapsed time setting device, Drilling stop having a drive stopping device for stopping the drilling work when the duration of the drilling speed reduction state measured by the elapsed time measuring device exceeds the allowable duration preset in the elapsed time setting device The hydraulic tap hole opening device according to claim 1, further comprising a setting control device.