JPH0480972B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a metal plate cooling device for cooling a metal plate heated and extracted in a heating furnace.

[Prior art] As a forced cooling device for metal plates, a device is well known in which a metal plate extracted from a heating furnace is conveyed horizontally on a roller conveyor, and a large amount of high-pressure water is injected from above and below the metal plate during conveyance to cool it. It is being

An example of a conventionally used metal plate cooling device will be explained with reference to FIG. 1. 1 is a heating furnace;
A cooling device 3 is installed downstream of the extraction port door 2 from which the heated metal plate is extracted.
A support frame 4 is attached to the cooling device 3, and this support frame 4
The lifting frame 6 is connected via the cylinder device 5.
is attached so that it can be raised and lowered, and the lower frame 7 is fixed. A large number of upper rollers 8 are supported on the lower side of the lifting frame 6 by bearings (not shown) so as to be horizontally arranged, and a large number of lower rollers 9 are installed on the upper side of the lower frame 7. The metal plates 1 are supported horizontally by bearings (not shown) on the lower frame 7, and are extracted by opening the extraction port door 2 of the heating furnace 1.
0 is transported to the right in FIG. 1 by an upper roller 8 and a lower roller 9.

11 is a cooling water storage tank, and the cooling water stored here is sucked by a pump 13 driven by a motor 12, and is supplied to the main header 17 through a valve 14, a filter 15, and a pipe 16. It is becoming more and more common. The cooling water supplied to the main header 17 passes through the gate valves 18, 19, 20, and 21, and is injected toward the metal plate 10 from above and below the metal plate 10 through a route described below.

Approximately half of the cooling water that has passed through the gate valve 18 passes through the flow rate regulating valve 22, the orifice 23, the zone pipe 24, and the flexible hose 25, and is attached to the side of the lifting frame 6 closest to the heating furnace 1 (the most upstream side). The high pressure is supplied to the No. 1 nozzle 26 which is
The liquid is sprayed obliquely from above in the direction in which the metal plate 10 is transported. Approximately half of the remaining cooling water that has passed through the gate valve 18 passes through the flow rate adjustment valve 27 and the orifice 28 and is supplied to the high-pressure No. 1 nozzle 29 installed at the most upstream side of the lower frame 7. The liquid is sprayed obliquely from the bottom in the direction in which the metal plate 10 is transported.

Approximately half of each of the cooling water that has passed through the gate valves 19, 20, 21 flows through the flow rate adjustment valves 30, 31, 32, the orifices 33, 34, 35, and the zone pipes 36, 3.
7, 38, flexible hose 39, 40, 41
It enters the sub-headers 42, 43, 44 attached to the lifting frame 6 through the sub-headers 42, 43, 44, and from there a plurality of high pressure No. 2 nozzles 45, low pressure No. 1 nozzles 46, which are also attached to the lifting frame 6, respectively.
It is supplied to the low-pressure No. 2 nozzle 47 and sprayed downward from the upper side of the metal plate 10.

The remaining approximately half of the cooling water that has passed through the gate valves 19, 20, 21 is transferred to other flow rate regulating valves 48, 49, 50,
Sub-headers 54, 5 are attached to the lower frame 7 through orifices 51, 52, 53.
5, 56, and from here also the lower frame 7
A plurality of high pressure No. 2 nozzles 57, low pressure No. 1 nozzles 58, and low pressure No. 2 nozzles 5 are respectively attached to the
9 and is sprayed upward from the bottom of the metal plate 10.

When using this device, the cylinder device 5
The height of the elevating frame 6 is adjusted by expanding and contracting, and the distance between the upper roller 8 and the lower roller 9 is maintained at about the thickness of the metal plate 10. Then, the motor 12 is rotated to drive the pump 13 to suck in and pressurize the cooling water, and supply the cooling water to the main header 17 through the valve 14, filter 15, and pipe 16.
When the gate valves 18, 19, 20, 21 are opened, the cooling water flows through the high pressure No. 1 nozzles 26, 29 and the high pressure No. 2 nozzle 4.
5, 57, low pressure No. 1 nozzles 46, 58, and low pressure No. 2 nozzles 47, 59 will inject. The metal plate 10 is cooled by the cooling water jetted from each of these nozzles.

The reason why the cooling water injected from the high-pressure No. 1 nozzles 26 and 29 is injected obliquely in the direction of transport of the metal plate 10 is to prevent the cooling water from returning to the heating furnace 1 and to prevent the cooling water from returning to the cooling start line. This is to stabilize the Since the nozzles after the high-pressure No. 2 nozzles 45 and 57 are not required to have a cooling start line, they can spray in any direction, and in the device shown in FIG. 1, they spray at right angles to the metal plate 10.

High pressure No. 1 nozzle 26, 29, High pressure No. 2 nozzle 4
5, 57, low-pressure No. 1 nozzles 46, 58, and low-pressure No. 2 nozzles 47, 59, as shown in FIG. 2 (only 26, 45 are shown in FIG. 2). The cooling water is ejected in the width direction of the metal plate 10. The width of the metal plate 10 varies from 1.5 to 5 m, but the jet width of the cooling water does not change, so when cooling a narrow metal plate 10, the width of the metal plate 10 is Cooling water injected into areas where there is no cooling water is air-injected and does not contribute to cooling. To compensate for this, a variable spray width nozzle that can change the spray width may be used.

FIG. 2 shows the flow direction of the cooling water as seen from above the metal plate 10, and it can be seen that the water in the center is divided into left and right sides and falls from both edges of the metal plate 10. When the cooling water flows in this way, the degree of cooling of the upper surface of the metal plate 10 is stronger at both edges than at the center.
The cooling rate at the center and both edges is different, causing deformation. Moreover, the amount of cooling water that does not hit the metal plate 10 becomes a loss.

The conventional metal plate cooling device described above has the following drawbacks.

() Cooling on the top and bottom surfaces of the metal plate is uneven, making it difficult to obtain a flat plate.

() In order to obtain a flat plate by adjusting the amount of cooling water above and below the metal plate, a sophisticated water flow control device is required.

() The supplied cooling water is not being used effectively.

[Object of the Invention] An object of the present invention is to provide a metal plate cooling device that can uniformly cool the upper and lower surfaces of a metal plate, thereby producing a flat metal plate.

[Structure of the invention]

The present invention includes a plurality of nozzles disposed above and below a running high-temperature metal plate, respectively, for injecting cooling water onto the top surface and bottom surface of the metal plate, respectively, and a plurality of nozzles disposed above the metal plate. An upper cover for storing cooling water in contact with the upper surface of the metal plate, and a nozzle disposed below the metal plate, in a longitudinally intermediate portion of the area where the cooling water is injected by the nozzle. and a lower cover for storing cooling water so as to be in contact with the lower surface of the metal plate in a longitudinally intermediate portion of the area where the cooling water is injected, and a nozzle located on the external upstream side of the upper cover and the lower cover. horizontally towards the cover.
Containing at least one pair of upper and lower nozzles held in an angular range of 10 to 30 degrees, and having a pair of upper and lower nozzles on the upstream and downstream edges of the upper cover and the lower cover that spray into the inside of the cover. The present invention relates to a metal plate cooling device characterized by:

〔Example〕

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

FIG. 3 shows one embodiment of the present invention.
The same parts as those in the figure are given the same reference numerals.

As shown in FIG. 3, an elevating frame 6 is attached via a cylinder device 5 to a support frame 4 of a cooling device 3 installed on the downstream side of the extraction port door 2 of the heating furnace 1 so as to be movable up and down. In addition, the lower frame 7 is fixed. A large number of upper rollers 8 are arranged horizontally and supported on the lower side of the lifting frame 6, and a number of lower rollers 9 are arranged horizontally and supported on the upper side of the lower frame 7. The metal plate 10 extracted by opening the extraction port door 2 is transported to the right (downstream side) in FIG. 3 by an upper roller 8 and a lower roller 9.

Cooling water in the cooling water storage tank 11 is sucked by a pump 13 driven by a motor 12, and is pumped through a pipe 16.
The main header 17 is supplied through the main header 17. The cooling water supplied to the main header 17 passes through the same route as the device shown in Fig.
No.2 nozzles 26, 29, high pressure No.2 nozzles 45, 5
7. The liquid is sprayed toward the metal plate 10 from the low-pressure No. 1 nozzles 46, 58 and the low-pressure No. 2 nozzles 47, 59. Especially high pressure No. 1 nozzle 26, 29
The jetting direction is made to advance the metal plate 10, and the jetting angle is kept in the range of 10 to 30 degrees from the horizontal to prevent backflow of the jetted water and maintain the so-called cooling start line.

An upper cover 60 is provided at the part of the high-pressure No. 2 nozzle 45 located between the high-pressure No. 1 nozzle 26 and the low-pressure No. 1 nozzle 46, which are arranged above the metal plate 10. A lower cover 61 is provided at a portion of the second high-pressure nozzle 57 located between the first high-pressure nozzle 29 and the first low-pressure nozzle 58 arranged below.

As shown in FIG. 4, both upstream and downstream ends of the upper cover 60 are attached to the high-pressure No. 2 nozzle 45 located at both ends, and a partition plate 62 facing upward is formed at that part. An opening 63 is bored in the center of 60. Further, the space covered by the upper cover 60 includes the high-pressure No. 2 nozzle 45 located in the center and a portion of the upper roller 8.

Both upstream and downstream ends of the lower cover 61 are attached to high-pressure No. 2 nozzles 57 located at both ends, and an opening 65 with a gate 64 is provided in the center of the lower cover 61.
is provided. In the space covered by the lower cover 61, there is a high pressure No. 2 nozzle 5 located in the center.
7 and some lower rollers 9 are included.

High-pressure No. 2 nozzles 45 and 57 arranged at both upstream and downstream ends inject cooling water obliquely toward the space covered by the upper cover 60 and lower cover 61 to form a fluid curtain.

The upper cover 60 and the lower cover 61 are made of metal plate 10
The upper cover 60 and the lower cover 61 are tightly joined on both sides. Therefore, the cooling water injected from the high pressure No. 2 nozzles 45 and 57 is transferred to the upper cover 60 and the lower cover 61.
fills the space covered by the metal plate 10, and comes into contact with both the upper and lower surfaces of the metal plate 10 to cool the metal plate 10.
A portion of the cooling water filling the space covered by the upper cover 60 and lower cover 61 falls through the opening 65 and gate 64 in the lower cover 61, and the remaining cooling water flows through the opening in the upper cover 60. 63 through the upper cover 60
Exit above. And the upper cover 60 and the partition plate 62
The water flows in the horizontal direction of the metal plate 10 through the groove 66 formed by the water, travels along the outer walls of the upper cover 60 and the lower cover 61, and falls.

The metal plate 10 extracted from the heating furnace 1 (see FIG. 3) is extracted from high pressure No. 1 nozzles 26, 29, high pressure No. 2 nozzles 45, 57, low pressure No. 1 nozzles 46, 58, and low pressure No. 2 nozzles 47, 59. Cooled by injected cooling water. The high pressure No. 1 nozzles 26 and 29 are similar to the conventional device explained in FIGS. 1 and 2.
Cooling water is ejected obliquely in the direction of transport of the metal plate 10 to ensure a cooling start line, and the metal plate 10 is first cooled with this cooling water, and then the cooling water in the upper cover 60 and lower cover 61 is cooled. The initial and intermediate stages of cooling are completed, and at least the surface is sufficiently cooled. The residual heat in the center of the metal plate 10 is at the following low pressure 1
No. 46, 58, low pressure nozzle No. 2 47, 59
Since the cooling water is ejected from the cooling water, uneven cooling in the width direction as in the conventional case does not occur.

If the metal plate 10 is thin, the injection of cooling water from the low pressure No. 2 nozzles 47 and 59 may be stopped, or
Alternatively, the injection of cooling water from the low-pressure No. 1 nozzles 46, 58 and the low-pressure No. 2 nozzles 47, 59 can be stopped to prevent wasteful consumption of the cooling water. Further, when the metal plate 10 is transferred at high speed, an upper cover 60 and a lower cover 61 may be provided at the positions of the low-pressure No. 1 nozzles 46 and 58. Further, the number of nozzles contained in the upper cover 60 and the lower cover 61 may be four or more if the transfer speed of the metal plate 10 is high, or none if the transfer speed is small, in addition to the two nozzles on the upper and lower sides of this embodiment.

〔Effect of the invention〕

The upper and lower surfaces of the metal plate can be cooled uniformly to obtain a flat plate, and the amount of cooling water can be changed according to the dimensions and shape of the metal plate, improving cooling efficiency and reducing wasted cooling water. Consumption can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a conventional device, FIG. 2 is a partially cutaway plan view of FIG. 1, and FIG. 3 is a partially cutaway side view of an embodiment of the present invention. FIG. 4 is an enlarged sectional view of the main part of FIG. 3. In the figure, 1 is a heating furnace, 10 is a metal plate, 26, 29
45 and 57 are high-pressure No. 1 nozzles, 46 and 58 are low-pressure No. 1 nozzles, 47 and 59 are low-pressure No. 2 nozzles, 60 is an upper cover, and 61 is a lower cover.

Claims (1)

[Claims] 1 A plurality of nozzles are arranged above and below a running high-temperature metal plate and inject cooling water onto the upper and lower surfaces of the metal plate, respectively, and a nozzle arranged above the metal plate. Therefore, in the longitudinal middle part of the area where the cooling water is injected, the cooling water is sprayed by an upper cover that stores the cooling water so as to be in contact with the upper surface of the metal plate, and a nozzle disposed below the metal plate. a lower cover for storing cooling water so as to be in contact with the lower surface of the metal plate in a longitudinally intermediate portion of the area where the water is sprayed; a pair of upper and lower nozzles that are maintained in an angular range of 10 to 30 degrees with respect to the horizontal direction, and that spray jets toward the inside of the cover at the upstream and downstream edges of the upper cover and the lower cover; A metal plate cooling device characterized by having a nozzle.