JPS6232642Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement in a forced cooling device for hot steel plates, such as hot rolled thick steel plates.

(Technical Background) A laminar flow nozzle, a spray nozzle, etc. are used as a means for cooling a steel plate in so-called online controlled cooling, in which a steel plate is hot-rolled and subsequently controlled and cooled to obtain a desired material quality.

Normally, steel plate rolling mills produce sheets of various widths on the same line, and even online controlled cooling equipment requires cooling according to the various widths of rolled sheets. On the other hand, two important points in controlled cooling are making the material of the steel sheet uniform within the sheet and maintaining a good shape of the sheet after cooling.

However, the temperature in the width direction of a steel plate tends to drop more significantly at the ends as the thickness of the steel plate becomes thinner. Therefore, in order to manufacture a steel plate with uniform material quality and good shape, it is necessary to reduce the cooling rate at the edges compared to the center.

(Prior art) Conventional examples of this type include JP-A-58-32511;
Japanese Patent Application Laid-Open No. 57-171626 is known. Japanese Unexamined Patent Publication 1983-
32511 is a system in which a shielding gutter is inserted between the steel plate and the nozzle to prevent cooling water from being injected into the end of the steel plate, and JP 57-171626 is a system in which a shielding gutter is inserted between the steel plate and the nozzle. In this system, a valve body is provided that is movable in the longitudinal direction, and the jet width of the coolant is adjusted by moving the valve body.

However, in JP-A-58-32511, it is necessary to insert a shielding gutter into the narrow area between the steel plate and the spray, which is subject to space limitations. There are problems such as difficulty in preventing dust and sealing the valve body.

(Purpose of the invention) The purpose of this invention is to solve the above-mentioned problems by fixing a manifold block to the water inlet of the cooling header, and installing a plurality of valve bodies at locations corresponding to the water inlet in the manifold block. Compact, inexpensive, and reliable spray shielding that opens and closes the flow path by rotating the valve body and selectively varies the spray width in the width direction of the steel plate. Provides a cooling header.

(Structure of the invention) FIG. 1 shows an embodiment of a cooling spray width control device according to the invention.

The header pipe 1 is arranged in a direction perpendicular to the line (ie, in the width direction of the threaded material). A manifold block 2 is connected to the upper part of the header pipe 1, and valve bodies 3 are linearly arranged on the side surface of the manifold block 2 at equal pitches in the plate width direction. The valve body 3 is located on the top surface of the manifold block 2.
A branch pipe 4 is joined at a position corresponding to , and a nozzle 5 is attached to the tip of the branch pipe 4. Further, a bearing 6 is disposed on the side surface of the header pipe 1 in addition to the manifold block 2, and supports a screw shaft 7. A striker 8 having a female thread (not shown) is attached to the screw shaft 7, and as the screw shaft 7 rotates, the striker 8 moves in the axial direction of the screw shaft 7.

FIG. 2 shows a detailed view of the manifold block 2. The valve body 3 has a stepped portion as shown in the figure, and also has a retainer 9, so that it receives a thrust load in the direction of the rotating shaft. Also seals 10 and 11
This prevents fluid from leaking in the direction of the rotating shaft. Further, a lever 12 is attached to the end of the valve body 3 on the screw shaft side. The striker 8 is moved along the manifold block 2 to a fixed position perpendicular to the axis of the screw shaft 7 by a guide 13 (not shown in FIG. 1).

(Operation of the invention) As the striker 8 moves, the lever 12 is turned by the striker 8, and as a result, the valve body 3 is rotated. The valve body 3 has a flow path 1 as shown in FIG.
4 is provided, and if this flow path 14 matches the flow path in the manifold block 2, the liquid will flow out, and if it deviates, the liquid will be cut off. Therefore, as shown in FIGS. 4a and 4b, for example, in order to prevent overcooling of both ends of the threaded material S, the unsprayed part of the striker 8 moves according to the width L of the material S, and the spray is removed from both ends of the threaded material S. You can use a method that does not spray the area. In the figure, part K is the area where the spray is ejected, and part T is the area where the spray is not ejected.

(Effect of idea) According to the present invention, there are the following advantages.

(1) Since the valve body 3 itself has a simple structure and is easy to operate, it is possible to shut off the spray stably and reliably.

(2) Since all the control mechanisms are located outside the header pipe 1, flushing inside the header pipe 1 is easy.

(3) Since the control mechanism mainly consists of the valve body 3 in the manifold block 2 and the screw shaft 7, it is compact and can be easily installed even in a narrow space.

(4) Maintenance is easy because the structure is simple.

(5) If the strikers are arranged vertically at regular intervals and the levers are alternately pushed down and returned, the spray width as shown in FIG. 4b can be selected at the above-mentioned regular intervals. (5th
Note that, apart from this embodiment, it is also possible to move the striker 8 by a chain instead of the screw shaft 7, without departing from the scope of the present invention. In addition, if the valve body 3 is of a commonly used ball valve type, the liquid supply can be shut off even more reliably.

[Brief explanation of the drawing]

Fig. 1 is an overall view of the device of the present invention, Fig. 2 is a detailed cross-sectional view of the manifold block section, Fig. 3 is a cross section A-A, Fig. 4 is a spray distribution diagram showing the effects of the present invention, and Fig. 5 Figure 6 shows the overall view and pattern diagram when the spray cutoff width is kept constant. 1... Header pipe, 2... Manifold block, 3... Valve body, 4... Branch pipe, 5... Nozzle, 6... Bearing, 7... Screw shaft, 8... Striker, 9... Retainer, 10, 11...Seal, 12...Lever, 13...Guide.

Claims (1)

[Scope of utility model registration request] A manifold block is fixed to the outer circumferential surface of the liquid supply header to form a plurality of common cooling channels, branch pipes are connected to the cooling channels so that liquid can pass therethrough, and a nozzle is disposed at the tip of the branch pipe. A valve body with a water passage hole is rotatably disposed in the block at a position that blocks the cooling flow path, a lever is disposed at one end of the valve body, and a manifold block on the side where this lever is disposed is provided. A striker is arranged on the circumference so that it can move in parallel, and the striker kicks a lever to rotate the valve body, which selectively opens and closes multiple cooling channels in the manifold block and stops liquid delivery to some nozzles. A hot steel plate cooling device configured as possible.