JPS58189067A - Method for controlling movement of pipe for ejecting refractory material - Google Patents

Abstract

PURPOSE:To accurately, certainly and automatically control the operation of an ejecting pipe, by detecting the rotation number of the ejecting pipe from the change of the pressure of driving oil for rotation, and controlling a mechanism for moving the pipe back and forth and/or a mechanism for driving a piston. CONSTITUTION:When an amount of a refractory material to be injected through an ejecting pipe 1 into a tapping hole A is increased, the rotation torque of the ejecting pipe 1 is also increased. This increase causes the increase of a load on a hydraulic motor 5 and the elevation of the pressure of driving oil for driving the motor, too. Said elevation of the pressure is detected by a means 72 for detecting pressure and sent to a motor 81 for operation and an electromagnetic valve 56 to control the rotation of the hydraulic motor 5, i.e. the ejecting pipe 1, and the second hydraulic cylinder 10 at the same time by the automatic operations of a valve 80 for automatically regulating a flow amount and the electromagnetic valve 56. Consequently, the outflow of the refractory material onto the surface of the tapping hole A to be worked is uniformly and smoothly performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is suitable for refractory lining work (hot and cold ) relates to a method for controlling the movement of a refractory pouring pipe.

For example, in a converter, the inner wall of the tap hole is generally eroded due to the molten steel during tapping, and as the diameter gradually increases from the initial diameter and the tap time becomes shorter, the rate of slag inclusion increases.
It becomes difficult to obtain a steel of good quality.

For this reason, several repair methods have been developed in the past, and one of them is the patent application filed by the applicant in
There is a method disclosed in No. 11700, in which a refractory pouring pipe is inserted into a tap hole, and a refractory is poured and deposited from the spout of the refractory pouring pipe toward the inner wall surface of the tap hole. This is the gist of the matter. However, in the conventional work of applying refractory lining using a pouring pipe, including such repair methods, the pouring pipe is operated exclusively manually, which results in excessively high pouring pressure. If this occurs, the spout pipe may rotate or stop, resulting in uneven lining on the wall being constructed.
Moreover, the working hours were also longer.

The present invention eliminates the drawbacks of the prior art, and provides a method for controlling a spout pipe that can accurately and reliably automatically control the operation of the spout pipe, thereby forming a good lining on the wall surface to be constructed. The purpose is to provide the following.

The present invention detects an increase in the rotational torque of the spouting pipe that exceeds a set value as a change in the operating hydraulic pressure for rotation, and uses the same detection signal to move the rotating mechanism and the pipe forward/backward mechanism, or between the rotating mechanism and the piston drive mechanism, or between the rotating mechanism and the pipe moving back and forth. The present invention relates to a method for controlling the movement of a refractory pouring pipe, which is characterized by controlling either the mechanism or the piston drive machine.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for controlling the motion of a refractory spout pipe according to the present invention will be specifically described below with reference to embodiments shown in the accompanying drawings.

(First Embodiment) FIG. 1 This embodiment detects the change in the working oil pressure due to the rotational torque of the spouting pipe, and controls the rotation and forward/backward movement of the spouting pipe based on the detection signal.

A hydraulic control system used in the control method shown in FIG. 1 and an I repair device controlled by the control system are shown. First, let's talk about the configuration of the repair device.
11 is a refractory pouring pipe inserted into the converter tap hole (A);
) is rotatably attached via a bearing (31+4) to the upper surface of the tip of a carriage (2) that can freely reciprocate towards the direction of the carriage (2).

The refractory pouring pipe (1) is rotated by a rotating hydraulic motor (5) provided on a bearing f41J2. Also, inside the refractory pouring pipe (1) is a refractory extrusion piston (
6) is slidably disposed, and the refractory material filled into the pouring pipe from the inlet (7) is refractory (6).
By operating the , the steel is extruded and deposited onto the inner wall surface of the tap hole (A) through the spout (8) provided at the tip of the spout pipe (1). Outlet pipe (1) of piston (6)
The sliding inside is performed by the first hydraulic cylinder (9) for driving the piston located at the rear, and the hydraulic cylinder (9) is mounted on the carriage (2) in the same way as the pouring pipe fil. There is. In addition, 0ψ is a 1@2 hydraulic cylinder for advancing and retreating the pipe to reciprocate the carriage (2), and the same hydraulic cylinder 0
Due to the drive of ω, the pouring pipe (1) and the first hydraulic cylinder (9) physically move forward and backward with respect to the tapping port (A).

Further, the hydraulic control system according to this embodiment has the following configuration. That is, in the figure (5o) is a hydraulic tank, (51)
indicates a hydraulic pump discharging hydraulic fluid at the required pressure, and (
52), (53), and (54) are the hydraulic motor control solenoid valves (5) that supply the hydraulic oil from the same hydraulic pump, respectively.
5), a hydraulic oil supply path for supplying the first hydraulic cylinder control solenoid valve (56) and the second hydraulic cylinder w4 control solenoid valve (57). In this example, the solenoid valve (55)
(56) and (57) use a 4-point, 2-position valve and a 4-point, 13-position valve, respectively.

In addition, each solenoid valve (55) (56) (57) and hydraulic motor (
5), 1st. Communication with the second hydraulic cylinder (9) and am is performed through outbound pipes (55a), (56a), and (57a) and return pipes (55b, 56b, and 57b), respectively. In addition, a hydraulic motor (5) and a solenoid valve (5)
The outgoing pipe (55a) connecting 5) is equipped with an automatic flow rate adjustment valve (
80) is attached, and the flow rate regulating valve (80) is driven by an operating motor (81). Note that (58) ~ (
62) are each solenoid valve (55) (56') from the power line
This is the lead wire to (57). Further, (63) is a relief valve. The hydraulic control system further includes a pressure detection circuit, which detects a change in the pressure of hydraulic fluid caused by an increase in the rotational torque of the hydraulic motor (5), and sends the detection signal to the operating motor (81) and solenoid valve(
57) to operate the automatic flow rate adjustment valve (80) and the solenoid valve (57) to control the rotation of the hydraulic motor (5), that is, the pouring pipe fll, and also to the IJ2 hydraulic cylinder OI, that is, the pouring pipe f11. The advance and retreat of the steel in the tap hole (A) can be controlled, and optimal pouring and adhesion conditions can be obtained. In this embodiment, the pressure detection circuit is as follows:
A pressure detection device (7o) is installed in the middle of the outgoing pipe (55a) of the hydraulic motor (5), and the pressure detection device M<10> is connected to the operation motor (81) and the solenoid valve (57), respectively, and to the signal transmission circuit ( 71) (72).

The extraction pipe is controlled as follows by the hydraulic control system having the above configuration.

First, the w42 hydraulic cylinder 0ω is driven to insert the pouring pipe (1) into the tapping port (1), and the pouring pipe (1) is rotated at the same time or before and after that. Furthermore, the first hydraulic cylinder (9) is driven to pour out the screw (6) from the pipe il.
1 to pour out the refractory through the spout (8),
It is attached to the inner wall surface of the tapping port (A), thereby tapping L.
J(A) will be repaired.

1- In the repair described above, the pouring pipe (+1 to the tapping port (A)
As the amount of refractory poured into the pipe increases, the rotational torque of the pouring pipe also increases. This increase in rotational torque increases the load on the hydraulic motor (5), and the hydraulic pressure for driving the motor increases in proportion to the increase in load. At this time, since the present invention has the above-mentioned pressure detection circuit, this pressure can be detected by the same circuit, and this detection signal can be sent to the operating motor (8) and the solenoid valve (57) to automatically control the flow rate. The regulating valve (80) and the solenoid valve (57) are automatically operated, and at the same time the hydraulic motor (5), that is, the pouring pipe (1) rotates, the second hydraulic cylinder αl, that is, the pouring pipe +1
By controlling the forward and backward movement of 1, the pouring pipe (1)
This allows the refractory to flow uniformly and smoothly onto the construction surface of the tap hole (A>).

(J82 Example) Figure 2 This example detects an increase in the rotational torque of the spout pipe +11 as a change in the operating hydraulic pressure for rotation, and uses the same detection signal to control the rotation of the spout pipe by the hydraulic motor and the piston drive mechanism. The invention relates to a method for controlling the movement of a piston for extruding refractories.

In the hydraulic control nostem of this embodiment, a pressure detection circuit is attached to a pressure detection device (72) in the middle of the outgoing pipe (55a) of the hydraulic motor (5), and the pressure detection device is connected to the operating motor (55a).
81) and the solenoid valve (56) to the signal transmission circuit (71) (
73).

With the above configuration, the pressure that increases in proportion to the increase in the load on the hydraulic motor (5) can be detected by the same circuit, and this detection signal can be sent to the operating motor (81) and the solenoid valve (56). By automatically operating the CC automatic flow adjustment valve 80) and the solenoid valve (56), the rotation of the pouring pipe (1) by the hydraulic motor (5) and the first hydraulic cylinder (9) for driving the piston are performed. By controlling the press-in speed of the piston (6), the refractory can be uniformly and smoothly poured from the pouring pipe (11) onto the uneven wall surface of the tap hole.

(I83 Example) Fig. 3 This example detects an increase in rotational torque of the pouring pipe fil as a change in the operating hydraulic pressure for rotation, and uses the same detection signal to rotate the pouring pipe by the pipe rotation mechanism and move the pipe forward and backward. The present invention relates to a method for simultaneously controlling the movement of a refractory pouring pipe by a mechanism and the movement of a refractory extrusion piston by a piston drive mechanism.

The hydraulic control circuit in this embodiment has a pressure detection circuit installed in the pressure detection device (
70) Install (72), connect the pressure detection device (70) to the operating motor (81) and the solenoid valve (57) through the signal transmission circuit (71a) (72), and operate the pressure detection device (72). motor (81) and solenoid valve (56)
It is characterized in that it is constructed by communicating with the signal transmission circuits (71b) and (73).

With the above configuration, the same circuit can detect the pressure that increases in proportion to the increase in the load on the hydraulic motor (5).
This detection signal is transmitted to the operating motor (81) and the solenoid valve (57).
) (56) to control the automatic flow rate adjustment valve (8
0) and solenoid valves (57) (56) to control the rotation and advance/retreat amount in the tapping port (A) of the pouring pipe (1), as well as the first hydraulic cylinder for driving the piston (
9), the press-fitting speed of the piston (6) can be controlled to obtain the optimum pouring and adhering conditions.
The 1lII#)i method of the pouring pipe according to the present invention can control the pouring (filling) of refractories into the runner, which was previously impossible, and thereby the following effects can be achieved. can.

(1) Lining with a uniform density can be applied to the entire inner wall surface of the construction body.

(2) Moreover, the refractory can be filled into even the smallest details without worrying about the unevenness of the construction body, and the adhesion rate can be improved.

(:3) Since it was possible to prevent excessive loads, we were unable to apply a lining to ensure smooth rotation of the spout pipe and movement of the piston, but we could detect changes in the movement of the spout pipe and The movement of the pouring pipe is accurately determined from the detected value at t51.
! By controlling the lining, it is possible to apply uniform lining (lining that is filled all over the area to be repaired and whose packing density is uniform at each part by t-minutes).

(5) It is possible to detect the onset of seizure of the spout pipe on the surface to be worked, and quickly retreat the spout pipe from the runner to prevent seizure.

[Brief explanation of the drawing]

! @ Figure 1 is a circuit diagram of a hydraulic control system used in the first embodiment of the control method for a refractory pouring vibrator according to the present invention, Figure 2 is a circuit diagram of a hydraulic control system used in the second embodiment, and Figure 3 is a circuit diagram of a hydraulic control system used in the second embodiment.
The figure is a circuit diagram of a hydraulic control system used in the third embodiment. Patent applicant: Kurosaki Ceramics Co., Ltd.

Claims (1)

[Claims] 1. An increase in the rotational torque of the spout pipe that exceeds the set value is detected as a change in the operating hydraulic pressure for rotation, and the detection signal causes the rotation mechanism and the pipe advancement/retraction mechanism, or the rotation mechanism and the piston drive mechanism, or the rotation mechanism and the pipe advancement/retraction mechanism. and a piston drive mechanism.