JPS6376714A - Nozzle header varying supply width - Google Patents

Abstract

PURPOSE:To perform minute and unwasted adjustment by changing an injection width of a fluid by a width corresponding to one nozzle pitch each in accordance with a sheet width. CONSTITUTION:In the case that the width of a strip is narrower that the standard width by one nozzle pitch (1P), the fluid injection width of a nozzle header 1 is reduced by a width corresponding to one nozzle pitch 1P. That is, a slide cylinder 10 is actuated and its output shaft 10a is moved forward from the retarcted position to shift a header 1 by a length corresponding to a 1/2 P to place the header 1 at the offset position with leading by a guide. At that time, a nozzle 5d on an end of the header 1 projects out of an edge side of the strip to be asymmetric. Then, air is supplied to an open-and-close air cylinder of the nozzle 5d to move a rod forward to close the nozzle 5 by a header valve 7. As the result. The injection width is narrowed by a 1/2 P width each at both ends of the header 1, totally 1P width. Therefore, wastefulness of a rolling oil caused by excessive injection is prevented because the rolling oil is injected just across the total width from the remaining nozzles 5.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a nozzle header that injects fluid such as water or oil onto an object to be sprayed, such as a band-shaped body such as a mesh plate, a rolling roll, or a car body. In particular, the present invention relates to a variable supply width nozzle header that allows the fluid jet width to be adjusted according to the width of the object to be jetted.

[Conventional technology]

For example, in the case of cold rolling, it is necessary to supply fluids such as rolling oil and water for lubrication between the rolling rolls and the rolled steel strip, or for cooling the rolled steel strip at -1'ffl. A nozzle header having a plurality of nozzles arranged in the width direction is used.

In that case, the width of the rolled steel strip (hereinafter referred to as sheet width) is not always constant. Therefore, unless the supply width of the supply fluid is changed according to the width of the plate, surplus fluid will be generated when the width of the plate is small, which is disadvantageous in terms of consumption of the supply fluid and rolling running cost.

To solve this problem, there is a variable supply width nozzle header as shown in FIG. 5, in which the jet width of the supply fluid can be adjusted according to the plate width.

That is, the one shown in FIG. 5 (al) is the header center Y-
A plurality of nozzles arranged symmetrically in the supply width direction with Y as an axis are separated into three systems: group IA near the center, group IB outside it, and group IC outside, and the nozzles in group IB are connected to valve 2B. , Group IC nozzles are valves 2C, each of which can be opened and closed independently. As a result, when valve 2C is closed, group I
All the nozzles C are closed at the same time, and the jet width is reduced by four times the nozzle pitch p compared to when the nozzles are fully open. Furthermore, when valve 2B is also closed, all the nozzles of group IC and group IB are closed simultaneously, and the injection width is reduced by 8p compared to when it is fully open.

The one shown in FIG. 5(b) similarly has a plurality of nozzles arranged symmetrically, and the nozzles located at symmetrical positions on the outside can be opened and closed individually by valves 3A to 3F. In this case as well, a pair of valves located at symmetrical positions on both sides are simultaneously opened and closed. This is to prevent misalignment between the center of the plate width and the center of the header, so for example, the outermost valve 3
Close A and 3F at the same time. As a result, the injection width is reduced by twice the nozzle pitch p (2p) compared to when the nozzle is fully opened. Furthermore, when valves 3B and 3E are both closed, the injection width is 4p.
Further, if valves 3C and 3D are closed at the same time, it is further reduced by 6p.

Furthermore, Japanese Patent Application Laid-Open No. 51-18965 discloses that a valve that can be opened and closed by changes in fluid pressure is provided in the header, and the valve is opened and closed by remote control based on changes in fluid pressure. Similarly, a method for controlling the jet width of the supply fluid is disclosed.

[Problem that the invention seeks to solve]

However, in such conventional variable supply width nozzle headers, it is necessary to align the center of the jet width with the center of the sheet width, so the nozzles at both ends of the header are always opened and closed at the same time in symmetrical positions. was. Therefore, when reducing the injection width from the fully open state, the nozzle pitch p is changed at once by a width equivalent to an integral multiple of 2, such as 2p, 4p, 5p, etc. Therefore, according to the plate width of the object to be sprayed, actually 1p for the nozzle pitch p,
3p, etc., where it is sufficient to simply adjust the width equivalent to an integral multiple, there is a problem in that an excessive amount of fluid is supplied in the width direction.

This invention was made by focusing on such conventional problems, and by changing the jet width of the fluid by the equivalent of one nozzle pitch according to the plate width, it is possible to make fine adjustments without waste. The purpose is to provide a variable width nozzle header.

[Means for solving problems]

This invention achieves the above object by arranging a plurality of fluid ejecting nozzles symmetrically from the center of the header in the width direction of the object to be injected, and in which the nozzles at both end regions can be opened and closed according to the width of the object to be injected. In the variable supply width nozzle header formed by the above structure, there is provided a guide mechanism that supports the header so as to be slidable in the width direction of the object to be ejected, and the header is mounted through the guide mechanism so that the center of the header is aligned on the center line of the object to be ejected. The present invention is characterized by comprising a drive device that displaces the header in accordance with the width of the object to be ejected between a certain normal position and an offset position shifted from the normal position by an amount equivalent to 172 nozzle pitches.

(Operation) When reducing the fluid ejection width of the variable supply width nozzle header by an amount equivalent to an odd multiple of the nozzle arrangement pinch, the header is slid to an off-cent position by a header drive device via a guide mechanism. As a result, the nozzle at one end of the header which protrudes from the end of the object to be sprayed and is asymmetrical is closed, and the nozzles at both end regions of the header are closed depending on the width of the object to be sprayed. On the other hand, if the nozzle arrangement pitch is to be reduced by an even number multiple, the header is slid to the normal position by the header drive device via the guide mechanism. As a result, the even number of nozzles at both ends of the header that protrude from the end of the object to be injected are closed according to the width of the object to be injected.

In this way, the jetting width can be changed by 1 for changing the plate width of the jetting object.
It can be finely adjusted in pitch equivalent increments.

〔Example〕

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

FIGS. 1 to 4 show specific examples in which the present invention is applied to a cold rolling mill.

That is, l is a variable width fluid supply nozzle header (hereinafter referred to as a header), which is provided in a pair of upper and lower parts with a band-shaped rolled W4 plate (strip) 3 in between, on the entry side of the work roll 2 of the rolling mill. There is. Note that 4 is a backup role.

As shown in FIG. 2, a plurality of fluid jet nozzles 5 are attached to the header 1 at equal intervals in the width direction of the strip 3 to be rolled. Each nozzle 5 is located at the header center Y-Y.
The nozzles are arranged symmetrically with respect to the center axis, and are divided into three groups: a group 5a near the center, nozzles 5b and 50 placed on the left and right sides of the group, and nozzles 5d and 5e placed outside of the group 5a.

Of these nozzles, the nozzles 5b to 5e at both end regions are each equipped with a header valve 7 having a built-in opening/closing air cylinder 6, and control rolling oil (not shown) sent to the nozzle 5 via a fluid supply hose 8. It is configured so that it can be automatically shut off based on a command from the device.

The header 1 is slidably supported by a guide 9 as a guide mechanism via a sliding plate 9a formed of a synthetic resin plate with a low coefficient of friction. A slide cylinder 10 as a drive device is attached to the guide 9, and its output shaft 10a is linked to the side surface of the header 1 via a connecting arm 10b.

This slide cylinder 10 is arranged between a normal position where the header center Y-Y is directly above the center of the strip 3 & ICL and an offset position where the header center Y-Y is shifted from the normal position by half the arrangement pitch p of the nozzles 5, that is, 1/2p. , header 1
This is a driving device for moving the strip 3 along the guide 9 in the width direction of the strip 3.

Next, the operation will be explained with reference to FIG.

FIG. 4 fa) shows a case where the width of the strip 3 is equal to the total length of the header 1 (hereinafter referred to as reference width).

The output shaft 10a of the slide cylinder 10 is retracted,
The header 1 is in normal position relative to the strip 3 and the nozzles 5 are all open.

At this time, rolling oil is ejected from all nozzles 5 to exactly the same width of the plate.

FIG. 4(b) shows a case where the width of the strip 3 is narrower by one nozzle pitch (1p) than the reference width. In this case, the fluid ejection width of the nozzle header 1 is reduced by one nozzle pitch (1p). That is, the slide cylinder 10 is driven to advance its output shaft 10a from the retreated position. As a result, header 1 is guided by guide 9 and 1/
Moves by 2p and places 1 at the offset position. At this time,
The nozzle 5d at the end of the header 1 protrudes from one end of the strip 3, making it asymmetrical. Therefore, air is sent to the open/close air cylinder 6 of this nozzle 5d, and the rod 6a is advanced, and the header valve 7 closes the nozzle 5d.

As a result, as is clear from the figure, the header 10 has 1
The injection width is narrowed by a total of 1 p at a time of 72 p, and the rolling oil is ejected from the remaining nozzles 5 exactly over the width of the plate, so there is no wastage of rolling oil due to excessive injection.

FIG. 4(C) shows a case where the width of the strip 3 is narrower by two nozzle pitches (2p) than the reference width. In this case, the fluid ejection width of the nozzle header 1 is reduced by an amount equivalent to two nozzle pitches (2p). That is, the slide cylinder 10 is driven to return its output shaft 10a from the forward position to the backward position. As a result, header 1 moves by 1/2 p and returns to its normal position.

At this time, the nozzles 5d and 5e at both ends of the header 1 protrude from the ends of the strip 3, respectively. So, nozzle 5
Close the header valves 7 of d and 5e and open the nozzles 5d and 58.
cut off.

As a result, the injection width is narrowed by 1p at both ends of the header 1, by a total of 2p, and the rolling oil is ejected from the remaining nozzles 5 to exactly the width of the plate, so that the wastage of rolling oil due to excessive injection is reduced. Does not occur.

FIG. 4(d) shows the case where the board width of the IJ flop 3 is narrower by 3 nozzle pitches (3p) than the above-mentioned reference width.

In this case, the fluid ejection width of the nozzle header 1 is reduced by an amount equivalent to three nozzle pitches (3p). That is, the slide cylinder 10 is driven to advance its output shaft 10a from the retreated position. Header 1 moves by 1/2p from this point,
As in FIG. 4 (bl), the nozzle 5d at one end of the header 1 protrudes from the end of the strip 3.

Therefore, the header valve 7 of this nozzle 5d is closed, and furthermore, the header valves 7 of the nozzle 5b on the inside thereof and the nozzle 5e at the opposite end are also closed and shut off.

As a result, the injection width is narrowed by 3p in the entire header 1, and the rolling oil is ejected from the remaining nozzles 5 just over the width of the plate, so there is no wastage of rolling oil due to excessive injection.

Fig. 4 (el) shows the case where the plate width of the strip 3 is narrower by 4 nozzle pitches (4p) than the above reference width. In this case, the fluid ejection width of the nozzle header 1 is reduced by the equivalent of 4 nozzle pitches (4p). That is, the slide cylinder 10 is driven and its output shaft 10a is returned from the forward position to the backward position.As a result, the header 1 moves by 1/2 p and returns to its normal position.

At this time, the nozzles 5b, 5d and 5C, 5e at both ends of the header 1 protrude from the ends of the strip 3, respectively.

Therefore, nozzles 5b, 5d, and 5c.

Each header valve 7 of 5e is closed to shut off those nozzles.

As a result, the injection width is narrowed by 2p at both ends of the header 1, by a total of 4p, and the rolling oil is ejected from the remaining nozzles 5 to exactly the width of the plate, so the wastage of rolling oil due to excessive injection is reduced. Does not occur.

Thus, according to this embodiment, the injection width of rolling oil from the header l of the cold rolling mill can be finely adjusted in steps equivalent to one nozzle pitch in accordance with the width of the strip 3, so that it is possible to finely adjust the injection width of rolling oil from the header l of the cold rolling mill. It has become possible to completely eliminate waste.In addition, the installation space can be reduced compared to before.

In the above embodiment, the header valve 7 for opening and closing a predetermined nozzle 5 is of a type having an opening/closing air cylinder 6, but is not limited to this, and other types such as a solenoid valve may also be used.

Further, although the drive device for the header 1 is configured using the slide cylinder 10, other known linear drive devices using an electric motor can also be applied.

Further, although the above embodiment has been described with respect to ten nozzles divided into three groups, the number of nozzles and the number of divisions are not limited to this and can be set as appropriate.

Furthermore, although the above embodiment describes the case of a nozzle header in cold rolling, the present invention is not limited to this. It is also applicable to cases where it is necessary to change the injection width.

〔Effect of the invention〕

As explained above, according to the present invention, the jet width of the supply fluid of the variable supply width nozzle header is changed by the equivalent of 1 nozzle pitch according to the plate width, so that fine adjustment without waste is possible. This has the effect of effectively preventing oversupply.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention. Figure 1 is a side view explaining the outline of the arrangement, and Figure 2 is a side view of the arrangement.
Figure 3 is a front view of the main part shown in the direction of the ■ arrow in the figure.
4(al) to (e) are header plan views for explaining the operation, and FIG. 5(al) and (b) are system diagrams of conventional variable supply width nozzle headers. 1 is a header; 3 is the strip (radiated body), 5 is the nozzle, p is the nozzle pitch, 7 is the header valve, 9 is the guide (
10 is a slide cylinder (drive device).

Claims (1)

[Claims] In the variable supply width nozzle header, a plurality of fluid ejection nozzles are arranged symmetrically from the center of the header in the width direction of the object to be injected, and the nozzles at both end regions are formed to be openable and closable according to the width of the object to be injected. , a guide mechanism that supports the header so as to be slidable in the width direction of the object to be ejected; A variable supply width nozzle header comprising: a drive device that displaces the header according to the width of an object to be ejected between offset positions shifted by two nozzle pitches.