JPH0480968B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to annealing equipment for directly heat-treating rolled wire rods.

(Prior art) When hot-rolled wire rod is wound into a coil using a winding machine, some types of steel have a high tensile strength and cannot be drawn as is, so the coil is made by utilizing its latent heat. The tensile strength may be weakened by cooling slowly.

As mentioned above, there are various types of slow cooling equipment that directly heat-treats and slow-cools coils. In order to change the slow cooling time according to the specifications, it is necessary to change the volume of the slow cooling area where the coil is slow cooled in the slow cooling equipment.

In addition, in order to process both slow cooling coils and non-slow cooling coils in one line to avoid deterioration of productivity, both slow cooling coils and non-slow cooling coils must pass through slow cooling equipment. However, in order to allow both slow cooling coils and non-slow cooling coils to pass through the slow cooling equipment, the slow cooling equipment must be used in a slow cooling position where the coil is slowly cooled, and a non-slow cooling position where the coil is not slow cooled. It is necessary to be able to change the position freely.

(Problems to be Solved by the Invention) However, in the past, it has not been possible to easily change the volume of the slow cooling region or change the position between the slow cooling position and the non-slow cooling position with a simple structure. I couldn't do it.

SUMMARY OF THE INVENTION An object of the present invention is to provide an annealing equipment that can easily change the position between an annealing position and a non-annealing position and easily set the volume of an annealing region to a desired volume.

(Means for Solving the Problems) The present invention provides an annealing facility in which a duct 8 having a heat insulating material on the inner surface surrounds a conveyor 4 for conveying a hot-rolled rolled wire coil 5. The following technical measures have been taken to achieve this.

That is, in the present invention, the duct 8 is composed of a plurality of ducts 10, 11, 12, 13 in the conveying direction, and the duct 10 on the entrance side has an opening/closing door 17 for opening and closing the entrance, a ventilation hole 22, and a ventilation hole 22.
The duct 10 on the inlet side is provided with a lid 18 for opening and closing.
Other ducts 11, 12, 13 connected to the wall portions 15, 16, 17, 18, 3 of the side walls and ceiling
3, 34, and the wall portions 15, 16, 17, 1
8, 33, and 34 are provided.

(Function) According to the present invention, when the coil 5 is to be slowly cooled, the coil 5 is conveyed into the duct 8 and is slowly cooled.

Then, by opening the walls 15, 16, 17, 18, 33, and 34 of the duct 8 according to the specifications of the coil 5, the volume of the slow cooling region of the duct 8 is set to a desired volume, and the slow cooling region is set to a desired volume. Conditions are set and the coil 5 is cooled slowly.

In addition, when the coil 5 is not slowly cooled, the duct 8
The walls 15, 16, 17, 18, 33, and 34 are opened to reduce the annealing volume of the duct 8 to zero, and the coil 5 is passed through the duct 8 in this state.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings.
1, a slow cooling equipment 1 is installed together with a plate conveyor 4 between a winding machine 2 such as a Pauling type or an Edenhorn type and a coil hanger 3.

The winding machine 2 winds the hot-rolled wire rod into a coil 5, and the wound coil 5 is
It is conveyed by a plate conveyor 4, a coil hanger 3, and a hook conveyor 7.

The slow cooling equipment 1 has a duct 8, and the duct 8
In this method, the conveyance path of the coil 5 is made internal in cooperation with the plate conveyor 4, and the coil 5 is gradually cooled by using its latent heat during the conveyance process. The conveying section of the plate conveyor 4 passes through the lower end region within the duct 8 .

The duct 8 is installed on the floor 9 and is configured by first to fourth duct parts 10 to 13 arranged in series in the conveying direction.

As shown in FIGS. 4 to 6, the first duct portion 10 includes a frame 14 and a pair of left and right side wall portions 15.
, a ceiling wall section 16 , a pair of left and right entrance doors 17 , and 3
It is composed of individual lid bodies 18 and the like.

The frame 14 projects above the floor 9 from a base 19 below the floor 9.
is shaped like a rectangular parallelepiped, and is provided with walls 15, 16, an entrance door 17, and the like.

The entrance door 17 opens and closes the entrance of the first duct section 10. Each entrance door 17 is provided on the frame 14 so as to be rotatable around the vertical axis, and is connected to the air via a continuous mechanism 20 such as a universal joint. It is continuously connected to the cylinder 21, and the entrance door 17 is opened and closed by the operation of the air cylinder 21.

A first square ventilation opening 22 is provided in the ceiling wall 16.
Three pieces are formed in the longitudinal direction of the duct part 10.

The lid body 18 opens and closes the ventilation ports 22, and is disk-shaped and covers each ventilation port 2 inside the first duct portion 10.
2 is located below.

Reference numeral 24 denotes three lid lifting devices, and the first duct part 1
0 in correspondence with each ventilation port 22 and lid body 18.

The lid lifting device 24 includes an air cylinder 25,
It is composed of a turnbuckle 26, a linking body 27, a guide device 28, and the like.

The air cylinder 25 is erected on the base portion 19 and is disposed underground on the side of the first duct portion 10 .

A chain, a rope, or the like is used as the linking body 27, one end of which is connected to the air cylinder 21 via a turnbuckle 26, and the other end is connected to the lid 18.

The guide device 28 includes a bracket 29 fixed to the upper surface of the side of the ceiling wall 16 on the air cylinder 21 side.
and a pair of pulleys 30 that are pivotally supported at both ends of the bracket 29, and the linking body 27 is guided by these pulleys 30.

Therefore, due to the expansion and contraction of the air cylinder 21, the lid 1 is moved through the turnbuckle 26 and the connecting body 27.
8 is raised and lowered, and the ventilation port 22 is opened and closed.

As shown in FIGS. 7 to 11, the second to fourth duct parts 11, 12, and 13 are all constructed in the same way, and these duct parts 11, 12, and 13 are
It is composed of a frame 32, a pair of left and right side walls 33, a top wall 34, and the like.

The frame 32 is a base part 19 below the floor 9 surface.
It protrudes above the floor 9 from the side wall 3.
It has pillars 35 that guide both side ends of 3.

The support column 35 is made of H-shaped steel and is installed vertically.
A side wall portion 33 is fitted to the support column 35 at its side end so as to be movable up and down.

Incidentally, each support column 35 of the third duct section 12 is connected to the second,
It is also used as the pillar 35 on the third duct part side of each of the fourth duct parts 11 and 13.

Reference numeral 36 denotes a side wall lifting device, which is disposed corresponding to each side wall 33 and is composed of an electric motor 37, a winding mechanism 38, an interlocking shaft 39, a linking body 40, a guide device 41, etc. There is.

The electric motor 37 has a built-in cyclone speed reducer and a brake, and is disposed on the outside of each side wall portion 33 .

The interlocking shaft 39 is horizontally installed between each electric motor 37 and each side wall 33 along each duct part 11, 12, 13, and is rotatably provided on the floor 9 via a bearing device 42. There is.

The winding mechanism 38 interlocks and connects the electric motor 37 and the interlocking shaft 39, and connects a pair of sprockets 44, 45 fixed to the drive shaft 43 and the interlocking shaft 39 of the electric motor 37, and both sprockets 44, 45. It consists of a chain 46 that is interlocked.

A chain, rope, etc. is used as the linking body 40, one end of which is connected to each end of the linking shaft 39,
The other end is connected to each side of the side wall portion 33.

The guide device 41 includes a bracket 47 fixed to each side end of the upper end of the frame 32;
The pulley 48 is
guides the connecting body 40.

In each side wall lifting device 36, the electric motor 37 drives the interlocking shaft 39 via the winding mechanism 38, and the interlocking shaft 39 winds up or unwinds the linking body 40. Side wall part 3
3 is raised and lowered.

As a result, each side wall portion 33 can be placed in a closed position in which it protrudes above the floor 9 and closes the side opening of each duct portion 11, 12, 13, as shown by the solid line in FIG. As shown by the imaginary lines in the figure, the ducts are stored in the basement below the floor 9 and can be freely changed in position between a fully open position in which the side openings of each duct part 11, 12, and 13 are open. There is.

The ceiling wall section 34 is placed on the upper ends of the left and right side wall sections 33 and/or the upper end of the frame 32 and is detachably fixed, and is attached and detached by a hoist 49 to open the upper opening of each duct section 11, 12, 13. is opened and closed.

50 is a hook of the hoist; 51 is a wire to which the hook 50 is engaged, and is detachably latched to the ceiling wall portion 34; And each wall part 15,16,33,34 of each duct part 10-13 entrance door 17 and lid body 18
A heat insulating material is fixed to the inner surface.

According to the embodiment configured as described above, during work, the hot-rolled wire rod is wound into the coil 5 by the winding machine 2, and then conveyed sequentially by the plate conveyor 4, the coil hanger 3, and the hook conveyor 7. To go.

In the above case, when the coil 5 is slowly cooled, the entrance of the first duct section 10 is first closed by the entrance door 17 during the winding operation by the winding machine 2.

When the winding work by the winding machine 2 is completed, the entrance door 17 is opened and the coil 5 wound by the winding machine 2 is conveyed by the plate conveyor 4 into the inside of the duct 8 whose inner surface is fixed with a heat insulating material. Then, the coil 5 is slowly cooled using its latent heat, thereby performing simple annealing of the coil 5 and weakening the tensile strength of the rolled wire rod.

In addition, after carrying the coil 5 into the duct 8,
The entrance of the first duct part 10 is closed by an entrance door 17 to improve the heat insulation properties of the first duct part 10.

In the above case, the volume of the annealing region in which the coil 5 is annealed in the duct 8 is determined according to the specifications of the coil 5 such as the diameter and length of the rolled wire rod, the steel type, and the unit weight of the coil 5. The coil 5 is slowly cooled by setting the volume and setting the slow cooling conditions.

That is, when it takes time for the metal structure of the rolled wire to transform, the ventilation port 22 of the first duct section 10 is closed with the lid 18, and the ventilation opening 22 of the second to fourth duct sections 11, 12, 13 is closed. The side opening and the upper opening are closed by the side wall part 33 and the top wall part 34, and the first to fourth duct parts 10 to 13 are used as slow cooling areas.

If time is not required for the transformation of the metal structure of the rolled wire rod, the interiors of the first to third duct sections 10, 11, and 12 are used as annealing regions in the same manner as described above, but the interiors of the fourth duct section 13 are used as annealing regions. In the case, the ceiling wall part 34
is removed by the hoist 49, and both side walls 33 are removed.
is housed underground in the fully open position, the side opening and the upper opening of the fourth duct part 13 are open, and the inside of the fourth duct part 13 is not used as an annealing region.

Furthermore, in the above case, when the unit weight of the coil 5 is small, the second to fourth duct parts 1 are set as intermediate positions between the closed position and the fully open position of the side wall part 33.
1, 12, 13, or second and third duct parts 1
The slow cooling regions 1 and 12 are set as regions spanning between the upper end of the side wall portion 33 located halfway in the vertical direction and the conveyance surface of the plate conveyor 4, thereby making the slow cooling regions small and increasing the cooling capacity.

In addition, when the coil 5 is not slowly cooled, the entrance door 17 of the first duct section 10 is left open, and the ventilation opening 22 is opened.
Ensure good ventilation.

In addition, in the second to fourth duct sections 11, 12, and 13, the top wall section 34 is removed by the hoist 49, and the side wall sections 33 are set to the fully open position to open the side openings and the upper opening. .

If the coil 5 is conveyed by the plate conveyor 4 in the above state, the coil 5 will not be slowly cooled.

If the cooling capacity of the first duct section 10 is to be further increased, the lid 18 is moved up and down to increase the amount of ventilation through the ventilation opening 22 and the inlet and outlet of the first duct section 10.

(Effects of the Invention) As detailed above, according to the present invention, in the slow cooling equipment provided with a tact having a heat insulating material on the inner surface surrounding a conveyor for conveying a hot-rolled rolled wire coil, The duct consists of a plurality of ducts in the conveyance direction, and the entrance duct is equipped with an opening/closing door that opens and closes the entrance, a ventilation hole, and a lid that opens and closes the ventilation hole, and other ducts that are connected to the entrance duct. is equipped with a side wall and a ceiling wall, and is equipped with a means for opening and closing the wall, so that the volume of the slow cooling area can be easily set within the range from zero to a predetermined volume, and the slow cooling equipment can be easily set. The position can be easily changed between the slow cooling position and the non-slow cooling position, and the volume of the slow cooling region can be easily set to a predetermined volume. The present invention has the above-mentioned advantages, has a simple structure, can be implemented at low cost, and is highly profitable.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is an overall explanatory diagram, FIG. 2 is a side view of the same, and FIG. 3 is a plan view of the same.
Fig. 4 is a longitudinal sectional view of the first duct section, etc., Fig. 5 is a plan view thereof, Fig. 6 is a sectional view taken along line A-A in Fig. 4, and Fig. 7 is a longitudinal sectional view of the second duct section, etc. 9 and 10 are cross-sectional views taken along lines B-B and C-C in FIG. 7, and FIG. It is an arrow view. 1... slow cooling equipment, 2... winding machine, 4... plate conveyor, 5... coil, 8... duct, 10
~13...First to fourth duct sections, 15, 33...
Side wall portion, 16, 34...Top wall portion, 17...Entrance door, 18...Lid body, 22...Ventilation opening, 24...Lid body lifting device, 36...Side wall portion lifting device, 49...
Hoist.

Claims (1)

[Scope of Claims] 1. In a slow cooling facility in which a duct 8 having a heat insulating material on the inner surface surrounds a conveyor 4 that conveys a hot-rolled rolled wire coil 5, the duct 8 has a plurality of ducts in the conveying direction. The duct 10 on the entrance side is equipped with an opening/closing door 17 for opening and closing the entrance, a ventilation hole 22, and a lid 18 for opening and closing the ventilation hole 22. The other ducts 11, 12, 13 to be connected are the wall portions 1 of the side walls and the ceiling wall.
5, 16, 17, 18, 33, 34, and means for opening and closing the walls 15, 16, 17, 18, 33, 34.