JPS60197814A - Quick cooler of atmosphere-treated steel material - Google Patents

Abstract

PURPOSE:To cool quickly steel materials passing in muffle tubes by partitioning the gaseous atmosphere admitted in the muffle tubes by the boundary between a heating side and a cooling side and circulating forcibly the gaseous atmosphere thereby cooling the steel materials. CONSTITUTION:Partition fittings 4 are provided in the parts where muffle tubes 3 penetrating through the inside of a cooling liquid tank 1 from one end face 1c to the other end face 1d projects from the tank 1 to the outside. Narrow paths 4d are formed of partition walls 4c to the extent of allowing passage of various steel materials A so that the atmosphere gas does not pass through said paths. A prescribed amt. of gas is sealed through a supply port 17 into the tubes 3 on the cooling side and a gas circulating blower 15 is operated by a motor 16. The gaseous atmosphere flows toward an inlet header 8 and is admitted from the face 1c via branch pipes 7 into the tubes 3 projecting to the outside. The gas admitted therein is cooled in the tank 1. The gas enters an outlet header 9 via the branch pipes 7 on the outside of the cooling system and is circulated through the zigzag pipe via a pipe 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for rapid cooling of atmosphere-treated steel materials, which enables rapid cooling of steel materials such as various wire rods and strip materials, such as stainless steel rA shrines or strip materials, by a pine full tube indirect cooling method after heating. Regarding equipment.

Conventionally, Matsuful Tube indirect water-cooling type cooling equipment for the purpose of cooling stainless steel wire or strip material after heating is arranged so that the Matsuful Tube after passing through a heating furnace is directly connected to a cooling water tank. Therefore, the amount of atmospheric gas flowing into the Matsuful tube is the same as in the heating furnace < 0.6
vn"/h, which was a small ω. Therefore, the atmospheric gas was almost Hi-residual in the tube, and moreover, the atmospheric gas heated on the heating side flowed into the tube on the cooling side. As a result, it was impossible to rapidly cool the steel material passing through the Matsufuru tube.

The present invention has been made in view of the above points, and its purpose is to partition the atmospheric gas flowing into the Matsuful Tube at the boundary between the heating side and the cooling side, and to create an atmosphere inside the Matsuful Tube on the cooling side. To provide the general public with a rapid cooling device for atmosphere-treated steel, which is capable of rapidly cooling steel passing through a pine-full tube arranged in a cooling liquid tank by forcing gas to circulate at high speed. be.

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

(1) is a cooling liquid tank, and the type of cooling liquid is determined depending on the type of steel material (8), cooling conditions, etc., but in this example, water is used. The coolant tank (1) has a coolant (2) inlet (
1a) and an outlet (1b) in order to maintain the temperature within the tank (1) at a substantially constant and acceptable temperature range. (
3) is from one end surface (1C) of the cooling liquid tank (1) to the other end surface (1C).
d) is a pine full tube arranged so as to penetrate through it. The tubes (3) are arranged parallel to each other at predetermined intervals within the tank (1) to form a tube group (3'). At least one end surface (1) of the cooling liquid tank (1)
The lc pine full tube (3) protrudes outside from C) and is connected to the heating side tube. (4) is the cooling liquid tank (
1) The 'JA
This figure shows the partition fitting for the atmospheric gas. Partition fittings (4)
As shown in FIGS. 2(a) and 2(b), a short pipe (4b) having connecting flanges (4a) at both ends is formed, and the short pipe (4b) is
A narrow path (4d) is formed in the partition wall (4c) so as to gradually narrow from both ends of the partition wall (4b) toward the center.

The narrow passage (4d) is designed to be a passageway that allows one or more stainless wire rods or strips (in this example, three stainless steel wire rods are passed through) and other various steel materials (A) to pass through. The tubes (3) on the heating side or the cooling side are structured so that the surrounding gas does not flow to the other side. One end surface (1C) and the other end surface (1d) of the cooling liquid tank (1)
A branch pipe (7) with a limiting orifice (5) and a gas cock (6) in the middle of the pine full tube (3) that protrudes outward from each and is located inside the mounting position of the partition fitting (4). ), (7°), and the other end is connected to the inlet header (8) on the atmospheric gas inlet side and the outlet header (9) on the atmospheric gas outlet side as shown in the first diagram. Ru. Entrance header (
8) and the outlet header (9) are one of the components of a circulation pipe (10), which further includes a flexible pipe (11) disposed in the liquid of the cooling liquid tank (1).

Connect the outlet side of the flexible pipe, and connect the terminal end to the inlet header (8
) side and a discharge side pipe (13) connected to the outlet header (9) side and the other end to the inlet side of the flexible pipe (11). be done. In the middle of the supply-side tank outside pipe (12), an atmospheric gas forced circulation means (14) that circulates the atmospheric gas at high speed is provided.
) will be established. In this example, the forced circulation means (14) includes:
Gas circulation blower (15') and the blower motor (
16) is used, and the atmospheric gas inside the cooling side Matsuful tube (3) is circulated at a high speed of about 2 m/sec. In the figure, (17) is the supply port for atmospheric gas, (1
8) does not show the gas relief valve, and (19) does not show the gas strainer.

Next, the operating state of the present invention will be explained.

First, a predetermined amount of gas is filled into the Matsuful tube (3) on the cooling side from the atmospheric gas supply port (17), and then the blower motor (16) is driven to open the gas circulation blower (15).
) is activated, the atmospheric gas passes through the supply side pipe (12) to the inlet header (8), and from the header (8) passes through the branch pipe (7) to one part of the cooling liquid tank (1). End face (1C
) is sent to the pine tree duplex (3) that protrudes outward. The atmospheric gas sent into the Matsuful tube (3) is separated by the partition fitting (4), so it does not flow into the Matsuful tube on the heating side, but is placed in the cooling liquid tank (1). The liquid flows into the heated Matsufuru tube (3), moves while being cooled in this cooling liquid tank (1), and is separated from the heating side Matsufuru tube by a partition fitting (4) near the end of the tube. Then, it does not flow to the Matsuful tube outside the cooling system, but passes through the branch pipe (1) to the outlet header (9).
and then proceed to the discharge side pipe outside the tank (13).

Then, in the process of rubbing the corrugated pipe (11), the atmospheric gas is cooled in the cooling liquid tank (1), and the gas circulation blower (15) is cooled.
) while being sucked into the supply side external tank vibrator (12). In this way, the atmospheric gas is circulated at high speed within the cooling system.

As can be seen from the above description, this invention includes a group of pine full tubes arranged so as to pass through from one end face to the other end face of a coolant tank having an inlet and an outlet for the coolant, and Atmosphere gas partitioning fittings are attached to the LC Matsuful tube parts that protrude from the other end faces to the outside, and cooling liquid tanks are installed at both ends of the Matsuful tubes, which are separated by both partition fittings attached to each Matsuful tube. This is a rapid cooling device for atmosphere-treated steel materials, which is characterized by connecting circulation pipes arranged so as to pass through them, and providing forced atmospheric gas circulation means in the middle of the circulation pipes. The atmospheric gas is separated by the boundary between the heating side and the cooling side, so there is no gas leakage between the heating and cooling sides, and the atmospheric gas inside the Matsuful tube on the cooling side can be forced to circulate at high speed. As a result,
The steel material passing through the Matsufuru tube disposed in the cold liquid tank can be rapidly cooled, and therefore a product with excellent heat treatment effects can be obtained.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the tree-benmei J-perspective view, Fig. 2 (a
) and (b) are a sectional view and a side view of the partition fitting. (1)...Cooling liquid tank, (1a)...Inlet, (1b)
···Exit. (1C)... One end surface, (ldl... Other end surface. (3)... Pine full tube, (4)... Partition fitting. (10)... Circulation pipe, (15)...・Gas circulation blower-0 Applicant: Kurosaki Roko Kogyo Co., Ltd.

Claims (1)

[Scope of Claims] A group of Matsuful tubes is arranged so as to penetrate from one end surface to the other end surface of a cooling liquid tank provided with a cooling liquid inlet and an outlet, and the cold IJ1 liquid tank has one end surface and the other end surface. Atmosphere scum partition fittings are attached to the parts of the Matsuful tubes that protrude to the outside from each of the Matsuful tubes. 1. A rapid cooling device for atmosphere-treated steel material, characterized in that circulation pipes arranged in a similar manner are connected to each other, and an atmospheric gas forced circulation means is provided in the middle of the circulation pipes.