JPS586872B2 - Impact crushing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for crushing and removing foreign substances such as metal and slag attached to a part of a refractory or the surface of a refractory, and particularly to a device for crushing and removing foreign substances such as metal and slag attached to a part of a refractory or the surface of a refractory. The present invention relates to a device suitable for shaping and cleaning the inner peripheral surface of objects.

Blast furnaces, hot metal furnaces, etc. have so-called "tuyeres" that supply hot air into the furnace.

The tuyere is charged with tuyere metal fittings, and the charging angle of the tuyere metal fittings has an extremely important effect on the melting of the charge in the furnace.

The tuyere hardware is double-walled using, for example, phosphor bronze or other metal, and the inside is cooled with water, and the inner peripheral surface of the tuyere refractory in contact with the tuyere metal is laminated with refractories to form a predetermined shape. It has been neatly formatted to look like this.

However, during furnace operation, foreign materials such as metal and slag may flow between the tuyere metal fittings and the tuyere refractory and adhere to and harden on the inner surface of the tuyere refractory. It may become impossible to insert the tuyere hardware at a desired angle due to the movement of the refractory due to the inflow of metal into the joints.

For this reason, it is necessary to remove objects to be removed such as foreign substances that have adhered to a part of the inner circumferential surface of the tuyere refractory or the surface of the refractory, and to shape and clean the inner circumferential surface of the tuyere refractory. .

Conventionally, in such cases, a breaker with a chisel attached to the tip has been used.

This breaker is a device with a structure similar to a rock drill.

The operator holds this breaker and scrapes off the object by hitting the object with the chisel in a direction substantially parallel or oblique to the surface of the object to be removed, such as attached foreign matter or refractory material that needs to be removed.

However, cleaning and shaping of tuyere refractories using such conventional equipment requires 6 to 7 workers per tuyere and takes about 30 minutes.

Moreover, the high temperature atmosphere in this area makes for a poor work environment.
Therefore, there has been a strong desire to develop a device that can quickly and easily remove foreign materials such as metal, slag, etc. that have adhered to large tuyere materials, or materials to be removed such as tuyere refractories. .

Further, foreign matter also adheres to refractories constituting the walls of tap troughs, ladles, or slag transport vehicles, and the work to remove them is extremely troublesome.

The present invention has been made in view of the actual state of the prior art, and its purpose is to remove foreign materials such as base metal and slag that have adhered and solidified on the surface of refractories, or To provide a labor-saving device that can quickly and easily remove objects to be removed.

To summarize, the present invention has an elevating cylinder mounted on a dolly that can be fixed with a clamp, and a beam that can be rotated, moved in the axial direction, and oscillated by a flexible shaft support mechanism at the end of the swinging boom provided at the top of the elevating cylinder. An air hammer device for hitting the object to be removed is attached to the tip of the beam, and a handle for operating the beam and a valve for the air hammer device are provided at the other end of the beam via a buffer joint. This is an impact crushing device constructed as follows.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

This embodiment is a suitable device for removing foreign matter adhering and solidifying to the inner circumferential surface of the tuyere refractory of a blast furnace and cleaning and shaping the inner circumferential surface of the refractory.

FIG. 1 shows its front view, and FIG. 2 shows its plan view.

A clamp 3 for fixing the truck 2 is provided at the front part of the truck 2 equipped with four wheels 1, and an elevating cylinder 4 is provided at the center.

A swing boom 5 is attached to the top of the lifting cylinder 4,
Thus, the swing boom 5 is swingable and can be fixed at a desired position by the swing lock lever 6.

The tip of the swinging boom 5 is bent upward and a flexible metal 7 as a flexible shaft support mechanism is attached to the tip of the swinging boom 5.
A counterweight 8 and a beam fixing metal fitting 9 are installed above the counterweight 8 at the base end thereof.

The beam 10 is fitted into the flexible metal T, and is fixed by a beam fixing fitting 9 when not in use, for example during storage or transportation.

An air hammer 11 that vibrates at high speed in a direction perpendicular to the axial direction of the beam 10 is provided at the tip of the beam 10, and a handle 13 is attached to the base end of the beam 10 via a buffer joint 12 made of rubber or the like. It will be done.

This beam 10 is hollow and is also used as a supply path for compressed air.

That is, compressed air supplied by the flexible hose 14 enters the connected beam 10 via the ball valve 15 and is passed through the beam 10 to the air hammer 11.

Note that reference numeral 16 is a weight for adjusting the balance of the beam 10.

When the beam fixing fitting 9 is released, the beam 10
is held only by the free metal 7 on the pivoting boom 5.

That is, as shown in FIGS. 2 and 3, the beam 10 is movable in its axial direction (arrow F) and rotatable around its axis (arrow G).

Moreover, it is swingable in the vertical direction (arrow H) and the horizontal direction (arrow ■ in FIG. 2).

Furthermore, when the swing lock lever 6 is operated to release the lock, the swing boom 5 becomes freely rotatable around the lifting cylinder 4 (arrow J).

Therefore, by operating the handle 13, the tip of the beam 10 can be positioned at a desired location.

Next, an example of the air hammer 11 attached to the tip of the beam 10 will be described.

As shown in FIGS. 4A and 4H, the air hammer 11 includes a cylinder 20, a piston 21 that slides inside the cylinder in a direction perpendicular to the axial direction of the beam 10, a compressed air flow path 22, and a compressed air flow path 22. It consists of a diaphragm valve 23 that controls the flow, and a removable bit 24 at the tip of the piston 21.
is installed.

First, in the striking process shown in FIG. 4A, compressed air entering from the blow-in port 25 passes through part A and enters above the piston 21 in the cylinder 20, pushing down the piston 21.

It is therefore possible to strike its opposite surface with the bit 24.

When the upper end of the piston 21 passes the exhaust port 26, part of the air flows out from the exhaust port 26 in the E direction, so the pressure inside the upper cylinder decreases, and conversely, the lower end of the piston 21 passes the exhaust port 26. Lower cylinder (indicated by B)
When the air inside is sequentially compressed and the piston 21 reaches the position shown in FIG. 4A, the valve 23 is pushed down through the flow path 22.

When the valve 23 is pressed down, as shown in FIG. 4B (return process), the compressed air entering from the air inlet 25 enters the lower cylinder B through the flow path 22 and pushes the piston 21. Raise it back up.

When the upper end of the piston 21 passes through the exhaust port 26, the air in the upper cylinder D section is sequentially compressed, pushing up the valve 23.

Thereafter, by repeating this process, the bit 24 can continuously strike the opposite surface at high speed.

The usage status of this device is explained as follows.

The apparatus is transported with the beam 10 fixed by the beam fixing fittings 9 and the turning lock lever 6.

For example, when this device is carried suspended by a crane or the like and installed on the landing 30 of the blast furnace tuyere, as shown in FIG.
The carriage 2 is fixed to the furnace wall shell 32 by the clamp 3 with the tip of the beam 10 inserted into the tuyere 28 so as to be positioned on a rail (not shown) provided above.

Next, the height of the beam 10 is adjusted as appropriate using the lifting cylinder 4.

The beam 10 is unlocked by the beam fixing fitting 9, the swing lock lever 6 is moved to release the lock, the ball valve 15 is opened, compressed air is sent into the beam 10, and the air hammer 11 is actuated.

By operating the handle 13, the worker moves the beam 10 in the axial direction, rotates it, and rotates it in the vertical and horizontal directions, and removes foreign matter such as metal, slag, etc. that has adhered and hardened to the inner peripheral surface of the tuyere refractory 31. The object 29 is struck at a substantially right angle by the air hammer 11 to be crushed and removed.

In this way, a clean orthopedic surface can be obtained easily and quickly.

After removing foreign matter, fireclay, refractory mortar, or the like is applied to the inner peripheral surface of the refractory 31 and the outer peripheral surface of the tuyere hardware 33, and the tuyere hardware 33 is inserted into the tuyere 28 at a predetermined angle.

In addition to shaping the tuyere of a molten metal channel as described above, the present invention is also applicable to refractories such as ladles, tap troughs, slag transport vehicles, etc., and the removal of foreign materials such as metal and slag attached to the refractories. It can also be used as a device.

As described above, in the present invention, since the cart 2 can be fixed with the clamp 3, impact crushing work can be smoothly performed even if the entire device is lightweight, and the beam 2 can be fixed without being moved by manual operation.
0 has an elevating cylinder 4 and a swinging boom 5 that can make large turns, and a swivel support mechanism 7 that allows for free shaft rotation, axial movement, and rocking for excellent operability.The beam 10 is equipped with an air hammer. 11, the hammer itself can be self-cooled when the working air is discharged, so it can sufficiently withstand the high temperature of the inner circumferential surface of the tuyere refractory 31, and also prevent changes in the hardness of the bit 24.

Furthermore, since the buffer joint 12 is interposed between the beam 10 and the handle 13, the vibration of the air hammer 11 is transmitted to the handle 13.
This prevents the vibration from spreading to other parts of the body, protects the operator, and prevents the opening degree of the ball valve 15 from changing due to vibration.

As described above, the present invention can quickly and easily remove foreign substances such as metal and slag adhering to refractories and the surfaces of refractories with a simple device configuration. When cleaning the refractory inner surface of the tuyere,
Conventionally, one tuyere required 6 to 7 workers for about 30 minutes, but by using the device of the present invention, only 1 tuyere was required.
The work can be completed in half the time required by a small number of workers, and in addition to the effect of improving environmental hygiene, it can have an extremely remarkable effect as a labor-saving machine.

[Brief explanation of drawings]

Fig. 1 is a front view of one embodiment of the device according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an explanatory diagram showing the movable mode of the beam, and Figs. 4A and B show the operation of the air hammer. Explanatory diagram showing, No. 5
The figure is an explanatory diagram of the usage status of this device. 2...Dolly, 4...Elevating cylinder, 5
...Rotating boom, 7...Flexible metal,
10...Beam, 11...Air hammer, 12...Buffer joint, 13...Handle, 15...Ball valve, 24...・・・・・・
Bit, 28...tuyere part, 32...furnace wall shell.

Claims (1)

[Claims] 1. An elevating cylinder is mounted on a trolley that can be fixed with a clamp, and a beam is supported so that it can rotate, move in the axial direction, and swing freely by a swivel shaft support mechanism at the end of the swing boom provided at the top of the elevating cylinder. A striking crushing device comprising: an air hammer device for striking objects to be removed at the tip of a beam; and a handle for operating the beam and a valve for the air hammer device attached to the other end of the beam via a buffer joint.