JPS6250013A - Apparatus for shutting off cooling fluid on bar steel rolling mill - Google Patents

Abstract

PURPOSE:To prevent a permeation of a roll cooling water into a sensor and to stabilize the sensibility of sensor by installing a guide pipe for a material to be rolled equipped with nozzle to inject a high pressure air and an exhaust port for the cooling water between a rolling mill and the sensor. CONSTITUTION:When the material 1 to be rolled is brought inside the first guide pipe 15, the cooling water, etc. entering by sticking to the rolling material is purged out from a purge port 6A by the high pressure air injected conically from the high pressure air injecting nozzle 11 equipped on the midway of the guide pipe 15. Then, the discharging the cooling water, etc. to the outside is more firmly performed by an action of a guide roller 9A. Further, the effect for preventing the scattering of cooling water for the sensor is surely performed by an action of the second guide pipe 25 equipped downstream the first guide pipe 15. In this way, the function of sensor is maintained.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a cooling liquid cutoff device for a steel bar rolling mill.

[Prior Art] Conventionally, in order to prevent troubles caused by heat from the rolled material, a large amount of cooling liquid such as roll cooling water is injected onto the roll surface of a rolling mill to cool the roll. Therefore, roll cooling water is scattered around the rolls, and the scattered cooling water is collected in scale sluices (grooves) provided at the bottom of the rolling line.

Moreover, in order to obtain rolling information tμ from the rolled material, sensors are installed between the rolling mills to measure and monitor, for example, the temperature, one dimension, and flaws of the rolled material.

[Problems to be Solved by the Invention] By the way, the sensors installed in the rolling line are as follows:
Due to the principle and structure of the sensor, it is extremely necessary to remove water, scale, etc. That is, when disturbances such as water and scale enter the detection part of the sensor, the detection accuracy of the sensor becomes extremely poor, and in some cases, the detection rate may decrease.

For example, in a sensor that determines the hot dimension of a rolled material, if disturbances such as water or scale enter the sensor, the lens of the detection section will be flawed and the detection section will be damaged.

Therefore, the installation δ position of the sensor in a conventional rolling line must be selected at a position where there is least disturbance from water, scale, etc. (for example, in the center between the rolling mills or at a position sufficiently far from the rolling mill). Furthermore, it is necessary to take measures to prevent disturbances at the entrance of the sensor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling liquid cutoff device for a steel bar rolling mill that allows a sensor to be installed even in the immediate vicinity of the rolling mill.

[Means for Solving the Problems] The present invention is a cooling liquid cutoff device for a steel bar rolling mill that cuts off the coolant supplied to the rolling rolls from a sensor disposed on the rear surface of the rolling mill, comprising: A guide pipe for the rolled material placed between the rolling mill and the sensor is provided with an outlet for discharging the coolant that has entered the guide pipe, and a high-pressure air jet nozzle that pushes the coolant that has entered the guide pipe is provided. It was decided to set it up.

[Function] According to the present invention, disturbances such as the cooling fluid that scatters around the rolling rolls and enters the guide tube, and the scales that are caught in the cooling fluid are removed by high-pressure air.
It becomes possible to output υF from I, and these disturbances do not affect the detection part of the sensor. Therefore, it is possible to reliably protect the sensor from disturbances even when the sensor is installed in the vicinity of the rolling mill. It is.

[Example] In FIG. 3, a rolling mill 2 is arranged in the rolling line 1, and a mill guide 3 is installed at the inlet and outlet of the rolling mill 4!12.
are clamped by a known mechanism.

A sensor 4 is provided downstream of the mill guide 3 on the output side, and control equipment such as a looper equipment is arranged downstream of the sensor 4.

1 and 2 are explanatory diagrams showing the mill guide 3. FIG.

One end of the inlet guide 6, which has a circular cross section in FIG. 1, is placed in substantially contact with the rolls 7 of the rolling mill 2. At the tip of the inlet guide 6, purge holes 6A are radially provided as discharge ports for purging a cooling liquid such as cooling water and disturbances such as scale. Entrance guide 6
The inner and outer diameter portions of the rear end portion have threaded surfaces, and the inner nozzle 8 is disposed on the inner diameter side. The end surface of the inner nozzle 8 projects rearward from the rear end surface of the artificial guide 6.

On the other hand, the guide guide 9 also has a circular cross section, and the inner diameter part and the outer diameter part of the end surface on the roll side are also shaped like the entrance guide 6.
The inner nozzle 10 is disposed on the threaded portion on the inner diameter side. The end surface of the inner nozzle 10 projects forward from the tip surface of the guide guide 9.

On the other hand, a guide roller 9A is arranged at the rear end of the guide guide 9, and this guide roller 9A is rotatable as the material to be rolled moves, and a gap is created between the inner surface of the guide guide 9 and the material to be rolled. We are trying to form a

Furthermore, a connecting bolt 12 having a high-pressure air introduction hole 11 is coupled to the outer diameter side threaded surfaces of the entrance guide 6 and the guide guide 9, thereby connecting the entrance guide 6 and the guide guide 9. Here, the inner nozzle 8.101 person 1-1 guide 6, guide guide 9 and connecting nut 12 form an air chamber 13 under their combined state, and the inner nozzle 8,
10, a nozzle part is formed in the gap between the opposing conical chamfered parts shown at an angle O in FIG. ing. The high pressure air ejection gap of inner nozzle 8, 1O is
It can be adjusted by adjusting the connecting bolt 12. Note that lock nuts are provided on both sides of the connecting nut 12 to prevent the connecting nut 12 from loosening due to vibration of the rolled material during rolling.

The inlet guide 6, the guide guide 9, and their connecting joints 12 form a first guide pipe 15, and this first guide pipe 1
5 is clamped to the rolling mill 2 in a state where it is assembled into a guide box 16A by a well-known stay bar 16 and a roller 17. Incidentally, an adjustment interval of dimensions shown by 2 in FIG. 1 is set for the first guide pipe 15 and the guide box 16A so that the first guide pipe 15 can be arranged even if the diameter of the rolling roll 7 changes. ing.

On the other hand, the entrance guide 19 at the senna entrance has a guide part that is wide at the entrance side in order to smoothly guide the material to be rolled, and on both sides of the outer periphery there are fixing pieces 20 as shown in FIG.
is welded and can be attached to a support base 21 placed on the guide box 16A with bolts or the like. In addition, the first
It is necessary to provide the support stand 21 at a position with an appropriate distance from the end surface of the guide tube 15. Furthermore, the population guide 19 and the exit guide 22 have the first guide tr! An inner nozzle 8.10 and a connecting nut 12 forming a nozzle part similar to that in 15 are connected. Further, an O-ring groove 23 is provided on the outer diameter side of the end surface of the exit guide 22, and an O-ring 24 is mounted in the groove.

That is, the above-mentioned inlet guide 19, outlet guide 22, inner nozzle 8.10, and connecting nut 12 are
A guide tube 25 is formed. The second guide pipe 25 uses the opening of the inlet guide 19 as an outlet for purging disturbances such as cooling water and scale, and uses the opposing gap of the inner nozzle 8 and 10 as a high-pressure air jet nozzle. A sealing plate 26 that closely contacts the side surface of the sensor is fitted into the O-ring 24 attached to the connecting end of 25, which ensures reliable prevention of disturbances and vibrations from the rolled material. We are aiming for defense 11.

Next, the operation of the 42nd embodiment will be explained. In this embodiment, roll cooling water is injected onto the roll surface of the rolling mill 2 as a cooling liquid, and there is a lot of splashed water around the mill guide 3. For this reason.

Water enters the inside of the t7.4 conduit 15 of the mill guide 3. Therefore, when the material to be rolled passes through the first guide pipe 15, roll cooling water is guided into the first guide pipe 15 and generated scale is brought into the first guide pipe 15. Under such circumstances, when the material to be rolled is not inside the first guide pipe 15, high pressure air is injected in a conical shape from the high pressure air jet nozzle provided in the middle of the first guide pipe 15, and cooling water etc. Disturbances are purged externally from the roll nip of the rolling mill. Moreover, when the material to be rolled enters the inside of the first guide pipe 15, the disturbance occurs in the first guide pipe 15.
It is purged to the outside from the purge hole 6A provided at the tip of the A conduit 15 (rolling mill roll side), but it is particularly important that the guide roller 9A that supports the rolled material is connected to the rolled material and the inner diameter of the guide guide 9. A gap is formed in the surface to ensure that disturbances can be purged to the outside. In addition, scale generated from the rolled material caused by sliding between the guide roller and the rolled material causes negative pressure at the guide roller (negative pressure is created by the injection of high-pressure air from the high-pressure air jet nozzle). Therefore, it is sucked in and purged to the outside through the purge hole in the same manner as described above.

In addition, a second guide pipe 25 provided downstream of the first guide pipe 15
By using the same purging method using the high-pressure air jet nozzle of the first guide pipe 15, it is possible to prevent disturbances such as cooling water from entering the sensor located downstream thereof. In addition, the second guide pipe 25 removes disturbances scattered around the outer periphery of the first guide pipe 15, and also makes it possible to prevent IF from transmitting vibrations from the rolled material to the sensor.

As described above, according to the above embodiment, one of the mill guides 3
'The A4 pipes 15, 25 can prevent disturbances from entering into the guide path of the rolled material, and can also prevent disturbances from entering the surrounding area, roughly blocking the transmission of vibrations to the sensor. I will do it. Therefore, the detection accuracy of the sensor is improved.

It is possible to prevent damage to the sensor 1F, and it is also possible to install the sensor close to the exit side of the rolling mill, making it possible to eliminate restrictions on the sensor installation position.

[Effects of the Invention] As described above, one aspect of the present invention is a cooling liquid cutoff device for a steel bar rolling mill that cuts off the coolant supplied to the rolling rolls from a sensor disposed on the rear surface of the rolling mill. A guide pipe for the rolled material placed between the rolling mill and the sensor is provided with an outlet for discharging the coolant that has entered the guide pipe, and a high-pressure air jet nozzle that pushes the coolant that has entered the guide pipe is provided. It was designed to be provided. Therefore, disturbances such as cooling fluid and scale that scatter around the rolling roll and enter the guide tube can be discharged from the discharge port by high-pressure air, and these disturbances can be prevented from affecting the detection part of the sensor. do not have. This makes it possible to reliably protect the sensor from disturbances when the sensor is installed in close proximity to the rolling mill.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
The top view of the figure and FIG. 3 are layout diagrams showing an example of a rolling line to which the present invention is applied. 2... Rolling mill, 4... Sensor, 7... Roll, 6
A...Purge hole, 8.10...Inner nozzle, 1
1... High pressure air introduction hole, 15... First guide pipe, 25
...Second guide tube.

Claims (1)

[Claims] (1) A coolant cutoff device for a steel bar rolling mill that cuts off the coolant supplied to the rolling rolls from a sensor placed at the rear of the rolling mill, and is placed between the rolling mill and the sensor. A steel bar rolling mill characterized in that a guide pipe of a material to be rolled is provided with a discharge port for discharging the coolant that has entered the guide pipe, and a high-pressure air jet nozzle that pushes the coolant that has entered the discharge port. Coolant shutoff device.