JPH05208215A - Shape detector - Google Patents

Abstract

PURPOSE:To prevent the detecting accuracy by thermal expansion of fluid in a hot line from reducing by supplying the fluid from the outside to fluid pocket parts formed at upper and lower positions of a stator and a rotor through a fluid supply path and a flow rate limiter. CONSTITUTION:Fluid 14 such as cooling liquid supplied from the outside through a fluid supply pipe 30 is supplied from a fluid supply port formed on an end plate to a fluid supply path 19 in the inside of the stator 12. After pressure is elevated by a fluid limiter 22 at fluid supply ports 20, 21, the fluid 14 is supplied to fluid pocket parts 15, 16 formed at upper and lower positions on the outside of the stator 12. Comparatively much fluid 14 elevated in pressure is supplied to the fluid pocket parts 15, 16, the fluid and pressure are restrained by a small gap 17 between the wall part 18 and the rotor 5 from escaping and the rotor 5 floats and is supported. Consequently, the fluid 14 can be prevented by the heat transmitted from a hot band plate 2 to the rotor 5 from thermally expanding remarkably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shape detector.

[0002]

2. Description of the Related Art Conventionally, in a cold rolling line, a shape detector as shown in FIG. 5 has been used to detect the shape of a strip.

In the shape detector 1, the hollow cylindrical stator 4 extending in the width direction 3 of the strip 2 is divided into a plurality of sections in the width direction 3, and the outer periphery of the stator 4 is divided into sections. The sleeve-shaped rotor 5 is rotatably fitted over the entire surface of the stator 4 in the circumferential direction with a small gap 6, and the air 8 supplied to the hollow portion 7 of the stator 4 is moved in the circumferential direction of the stator 4. The rotors 5 are suspended and supported by the pressure of the air 8 by ejecting the air from a large number of air outlet holes 9 formed at every 45 degrees to the gaps 6 between the rotors 5 and the upper portion of each rotor 5. When passing the strip 2 through the
The position of the rotor 5 is pushed downward by the strip plate 2,
It is detected by the pressure detection pipes 10 and 11 provided at the upper and lower positions of the stator 5 that the vertical distance of the gap 6 changes and the pressure changes up and down. Based on the signal, an external differential pressure gauge (not shown) is used to form the gap 6
The shape of the strip 2 in the width direction 3 is detected by taking the pressure difference between the upper and lower sides of the band and comparing the pressure difference for each section.

[0004]

However, the above-mentioned conventional shape detector has the following problems.

That is, in order to suspend and support the rotor 5 by the pressure of the air 8, the gap 6 between the stator 4 and the rotor 5 is used.
Since the rotor 5 has a very small interval, when the rotor 5 has heat, the heat is transmitted to the air 8 flowing through the gap portion 6 and the air 8
Is easily thermally expanded, and the thermally expanded air 8 changes the interval of the gap 6 to reduce the detection accuracy.
It was difficult to use the shape detector 1 as it is in a high temperature hot rolling line.

In view of the above situation, it is an object of the present invention to provide a shape detector that can be used in a hot rolling line.

[0007]

According to the present invention, a rod-shaped stator extending in the width direction of a strip is divided into a plurality of sections in the width direction, and a sleeve-shaped rotor is provided on the outer surface of the stator for each section. At least the upper and lower positions are rotatably fitted to each other with a small gap, and fluid pockets are provided in the portions of the outer surface of the stator where the upper and lower gaps are formed. A fluid supply path having a flow restrictor capable of supplying the fluid and a fluid discharge path capable of discharging the fluid leaked from the fluid pocket to the gap side to the outside are formed in the stator, and pressure detection tubes are provided in the upper and lower fluid pockets, respectively. The present invention relates to a shape detector characterized by being attached.

[0008]

According to the present invention, when the fluid is supplied from the outside through the fluid supply passage and the flow restrictor to the fluid pocket portions formed at least at the upper and lower positions of the stator and the rotor,
A large amount of fluid is stored at a high pressure in the fluid pocket portion, and the pressure of the fluid supports the rotor.

Since a large amount of fluid is stored in the fluid pocket portion, even if it is used in a hot rolling line and the heat of the strip is transferred to the fluid inside the fluid pocket portion through the rotor, the fluid is abruptly increased. It is prevented that the detection accuracy is lowered due to the thermal expansion.

The fluid leaked from the fluid pocket portion is discharged to the outside through the fluid discharge passage.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention.

Further, in the figure, the same components as those in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted. Hereinafter, only the configuration unique to the present invention will be described.

The rod-shaped stator 12 is divided into a plurality of sections 13 in the width direction 3 of the strip plate 2, and each section 13 has a relatively large amount between the rotor 5 at the upper and lower positions of the outer surface of the stator 12. The fluid pockets 15 and 16 capable of storing the fluid 14 such as the cooling liquid are formed, and the wall 18 that forms a small gap 17 with the rotor 5 is formed around the fluid pockets 15 and 16. ..

A fluid supply hole 20 is formed between the fluid supply passage 19 formed in the stator 12 and extending in the width direction 3 of the strip 2 and the fluid pockets 15 and 16 formed at the upper and lower positions of the outer surface of the stator 12. , 21, and a flow restrictor such as an orifice 22 is provided in each of the fluid supply holes 20, 21.

Further, pressure detecting pipes 23 and 24 are provided in the upper and lower fluid pockets 15 and 16, respectively.
3, 24 are connected to an external differential pressure gauge (not shown) so that the differential pressure gauge can detect the differential pressure between the two.

A groove-shaped fluid return path 25 is provided around the boundary of each section 13 of the stator 12, and the stator 12
A portion of the strip plate 2 in the front and rear of the feeding direction 26 is cut out to form a fluid return path 27 extending between the rotor 5 and the width direction 3 of the strip plate 2 and communicating with the fluid return path 25.

End plates 28 are fixed to both ends of the stator 12 so as to allow the rotation of the rotor 5, and fluid supply ports 29 are formed in the end plates 28 for communicating the fluid supply passage 19 with the outside. A fluid supply pipe 30 for supplying the fluid 14 from the outside is connected to the fluid supply port 29, and a fluid discharge port (not shown) that connects the fluid return path 27 and the outside is formed in the end plate 28 to form the fluid. Fluid 1 to the outside not shown in the outlet
Connect the fluid discharge pipe for discharging 4.

Reference numeral 31 in the drawing is a seal.

Next, the operation will be described.

The fluid 14 such as a cooling liquid, which is supplied from the outside through the fluid supply pipe 30, is supplied from the fluid supply port 29 formed in the end plate 28 to the fluid supply passage 19 inside the stator 12.
Is supplied to. Fluid 14 supplied to fluid supply path 19
After the pressure is increased by the orifices 22 in the fluid supply holes 20 and 21, they are supplied to the fluid pocket portions 15 and 16 formed at the upper and lower positions of the outer surface of the stator 12.

Then, in the fluid pocket portions 15 and 16,
A relatively large amount of the fluid 14 whose pressure is increased by the orifice 22 is supplied from the fluid supply holes 20 and 21, and the fluid 14 and its pressure escape due to the small gap 17 between the wall portion 18 and the rotor 5. Therefore, the rotor 5 is suspended and supported by the high-pressure fluid 14 stored inside the fluid pockets 15 and 16.

The fluid 14 stored in the fluid pockets 15 and 16 flows from the small gap 17 between the rotor 5 and the groove 5 into a groove-shaped fluid return path 25 formed at the boundary of each section 13. Through or directly, it is sent to a fluid return path 27 provided at a position in the stator 12 before and after the strip plate 2 in the feed direction 26, and from a fluid discharge port (not shown) formed in the end plate 28 via a fluid discharge pipe. It is discharged to the outside.

When the strip 2 is passed through the upper portion of the rotor 5 in each compartment 13, the rotor 5 is pushed downward by the strip 2 and the pressure inside the upper and lower fluid pockets 15 and 16 changes. The pressure inside the upper and lower fluid pockets 15 and 16 is detected by using the pressure detection pipes 23 and 24 provided in the fluid pockets 15 and 16, respectively, and the differential pressure between the two is obtained by an external differential pressure gauge (not shown). The shape of the strip 2 in the width direction 3 is detected by.

In the present invention, the stator 12 is provided with the fluid pockets 15 and 16 so that the strip 2 is suspended and supported by the relatively large amount of the fluid 14. Therefore, even when the strip 2 is used in the hot rolling line, the hot rolling is performed. The fluid 14 is prevented from undergoing large thermal expansion due to the heat transferred from the strip 2 to the rotor 5, and the detection accuracy is prevented from being lowered.

In particular, since the fluid pockets 15 and 16 are provided to secure a large capacity for the fluid 14, the rotation of the rotor 5 causes a flow in the fluid 14 inside the fluid pockets 15 and 16 to cause fluid flow. Since the pressure fluctuation phenomenon that the pressure becomes higher on the downstream side than on the upstream side of the flow in the pocket portions 15 and 16 is less likely to occur, it is possible to use a liquid such as a cooling liquid having a higher viscosity than the air as the fluid 14. It is suitable, and since liquid has a larger heat capacity and larger load capacity than air, the use of liquid
The effect of cooling the rotor 5 and the effect of increasing the capacity of the fluid pockets 15 and 16 are expected.

Incidentally, the fluid 14 discharged from the fluid discharge pipe is circulated to the fluid supply pipe 30, and a fluid cooling device or the like is provided in the middle of the circulation path to positively cool the fluid 14 and thereby the fluid pocket portion. It may be supplied to 15 and 16.

FIG. 4 shows a second embodiment of the present invention, in which fluid pockets 33 and 34 are formed at positions in the stator 32 in the feed direction 26 of the strip 2 as well as in the above embodiment. In addition to being able to obtain the same action and effect, a large self-aligning effect can be obtained against an unbalanced load from the strip 2.

In this case, the fluid pocket portions 15, 34, 16, 33 which are adjacent to each other in the circumferential direction of the stator 32 are provided.
A fluid discharge passage 35 extending in the width direction 3 of the strip 2 is also formed at the boundary position between the fluid discharge passage 36 and the fluid discharge passage 36 at the axial center of the stator 32.
And a fluid discharge path 37 is provided between the fluid discharge paths 35 and 36.
And the fluid supply passage 38 is displaced from the axial center of the stator 32 so that the fluid pockets 15, 1
It is provided for every 6, 33, 34.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0031]

As described above, according to the shape detector of the present invention, the fluid pockets are provided on the upper and lower sides of the stator. Therefore, the shape detector can be used in a hot rolling line without any trouble.

[Brief description of drawings]

FIG. 1 is a side sectional view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 viewed from a II-II direction.

FIG. 3 is a partially cutaway perspective view of FIG. 1.

FIG. 4 is a side sectional view of a second embodiment of the present invention.

FIG. 5 is a partially cutaway perspective view of a conventional example.

[Explanation of reference numerals] 2 strip plate 3 width direction 5 rotor 12, 32 stator 13 section 14 fluid 15, 16 fluid pocket portion 17 gap 19, 38 fluid supply path 20, 21 fluid supply hole (fluid supply path) 22 orifice (flow rate) Limiter) 23,24 Pressure detection pipe 25,27 Fluid return path (fluid discharge path) 35,36,37 Fluid discharge path

Claims (1)

[Claims] 1. A rod-shaped stator extending in the width direction of a strip is divided into a plurality of sections in the width direction, and a sleeve-shaped rotor is provided between each section and at least upper and lower positions of the stator outer surface. A flow restrictor that can be rotatably fitted with a small gap and is provided with fluid pockets in the upper and lower gaps of the outer surface of the stator to supply fluid to each fluid pocket. A shape characterized in that a fluid discharge passage capable of discharging fluid leaked from the fluid supply passage and the fluid pocket portion to the gap side to the outside is formed in the stator, and pressure detection pipes are attached to the upper and lower fluid pocket portions, respectively. Detector.