JPH047073A - Apparatus and method for removing matter bonded to inner wall of windmill type cylindrical chute - Google Patents

Abstract

PURPOSE:To efficiently remove bonded matter by rotating a windmill within a cylindrical chute by air passing force and removing the bonded matter by the beating action of the beating arm provided to the outer wheel of the windmill. CONSTITUTION:A suction fan 32 is operated in such a state that all of the blow-in ports into a mill in usual operation are cut off and the open air is sucked in the mill from the gate opening part 25 of the mill to generate air flow in a cylindrical chute 17. A windmill 10 is rotated by said air flow and the beating arms 12 of the windmill are opened by the centrifugal force accompanied by the rotation of the windmill to continue rotation in contact with the bonded matter 20 on the inner wall of the cylindrical chute 17 and the bonded matter 20 are shaven off by the pawls 14 provided to the leading ends of the arms 12. At this time, the beating arms 12 open corresponding to the shaving shape of the bonded matter 20 and also acts so as to always position a removing apparatus at the center of the opening and strike the matrix material of the inner wall of the cylindrical chute 17 when the bonded matter 20 is sufficiently shaven off to perfectly remove the bonded matter 20. By this method, the bonded matter 20 can be efficiently removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus and method for removing deposits from the inner wall of a cylindrical chute of, for example, granulated blast furnace slag drying and crushing equipment.

[Prior Art] The following method has been used to remove deposits adhering to the inner wall of a cylindrical chute of, for example, granulated blast furnace slag drying and crushing equipment.

■ Method of removing by applying impact vibration to the lower part of the cylindrical chute (Figures 6 and 7) Stop the equipment, enter the mill, and place the cylindrical chute on the mill table 15 and between the table rollers 16 and 16. Vibration is applied to the lower outer surface of the chute 17 using a large hammer 18 or a hammer 19 to remove granulated slag powder 20 and the like adhering to the inner wall of the cylindrical chute.

■ Method of removing by blowing compressed air or jet water (Fig. 8) Stop the equipment, open the mill gate valves 21 and 22, set up the scaffold 23 above the mill gate, and insert the injection nozzle 24 from this position. Then, the granulated slag powder 20 adhering to the inner wall of the cylindrical chute 17 is sequentially removed from the top to the bottom by compressed air or jet water flow supplied from a compressed air generator or a jet water flow generator (not shown). Detach and remove.

■ Method of removing concrete using a concrete crusher (Fig. 9) Stop the equipment, close the mill gate valves 21 and 22, suspend the monkey ladder 26 from the side opening 25 into the cylindrical chute 17, and Scaffolding basket 2 at the appropriate position of 26
7 is provided, a worker 28 rides on the scaffolding basket 27, and uses a concrete crusher 29 to scrape and remove the deposits 20 from the top to the bottom of the cylindrical chute. ′ [Problems to be solved] However, each of the above methods (■ to ■) has the following problems.

■Problem 1) It is not possible to hit anything other than the lower part of the cylindrical chute, and the vibration cannot be sufficiently transmitted to the upper part. Therefore, the parts with weak adhesion will be separated, or the parts with strong adhesion, especially the upper part, cannot be removed satisfactorily.

2) Since the surface layer of the inner wall of the cylindrical chute cannot be removed sufficiently, the remaining deposits will attract adhesion during the next operation.

3) Since the work is inside a mill and the work is at the bottom of a cylindrical chute, safety is poor due to falling objects.

4) It is manual labor, increasing construction time and labor costs.

Problem 1) Since the injection nozzle piping is extended as the removal progresses from the top to the bottom of the cylindrical chute, the nozzle cannot be operated to the target location due to the injection reaction. Therefore, the lower the part, the more difficult it is to remove.

2) Fixed particles cannot be removed sufficiently because there is a limit to the ability of the jet to remove them.

3) Whether compressed air or jet water is used, the equipment is large-scale, and in order to use it, the scaffolding above the mill gate and the water receptacle on the mill table require a huge amount of construction time and construction costs.

4) For pressure injection work such as compressed air and jet water,
Safety is poor due to scattering of adhered substances.

■Problem 1) A scaffolding cage is suspended from a monkey ladder, and the work is performed on top of the cage, so there is no stability.

2) The inside of the cylindrical chute is narrow, and it is difficult to maintain a proper working posture due to the need to wear protective equipment, life lines, lighting equipment, and the electric cord and air hose that power the crusher.

3) Since it is a concrete crusher, there is a limit to the removal density and it is not possible to remove the entire material sufficiently.

4) Since the inside of the cylindrical chute is removed sequentially from the top,
-It is a big job and therefore takes a long time to construct.

An object of the present invention is to provide an apparatus and method for removing deposits on the inner wall of a windmill-type cylindrical chute, which can solve the above problems.

[Means for Solving the Problem] The device for removing deposits on the inner wall of a windmill type cylindrical chute of the present invention is a device for removing deposits deposited on the inner wall of a cylindrical chute that can obtain the ventilation force necessary to rotate the windmill. A windmill in which the tips of a plurality of blade members fixed radially to a bearing case are fixed to an outer ring, and a plurality of striking arms, convex members, or chains provided swingably in a radial direction on the outer periphery of the outer ring of this windmill. , and a hanging member provided at the top of the support shaft incorporated in the bearing case.

The removal method is characterized in that the above-mentioned deposit removal device is rotated by a ventilation force inside the cylindrical chute and moved up and down to remove the deposits attached to the inner wall of the cylindrical chute. be.

[Function] By rotating the windmill in the cylindrical chute by the wind force, by the striking action of the hitting arm, chain, etc. provided on the outer ring of the windmill, or by the scraping action of the convex member, the deposits are removed all the way to the inner wall surface of the chute. Can be removed.

Then, by sequentially moving the removal device up and down,
It is possible to remove deposits over the entire height of the chute.

[Example 1] An example of the apparatus of the present invention will be described below with reference to FIGS. 1 and 2.

A wind turbine 10 is constructed by fixing a plurality of blade members 6 radially to the bearing case 4 by welding or the like, and by fixing an outer ring 5 to the tips of the blade members 6 by welding or the like.

A hanging member 2 is screwed onto the top of a support shaft 1, and this support shaft 1 is assembled into a bearing case 4 via a bearing 3, so that the windmill 10 can rotate around the support shaft 1.

Members 11 having holes for rotatably supporting a beating arm 12 are welded to the outer periphery of the outer ring 5 of the wind turbine in equal locations. The striking arm 12 has a dogleg shape and has a claw 14 made of a wear-resistant material welded to its tip. The proximal end is bent at a substantially right angle, inserted into a hole in the member 11, and is prevented from being pulled out by a retaining ring 13.13.

Next, the case where the present apparatus is used to remove deposits from the inner wall of the cylindrical chute of the granulated blast furnace slag drying and crushing equipment will be explained with reference to FIG.

Granulated blast furnace slag as a raw material is supplied from a cylindrical chute 17 and pulverized on a mill table 15 by table rollers 16 . The crushed granulated slag is transferred to the mill table 15.
It is dried by hot air from a hot air duct 30 connected to the lower side of the. Then, the dried product granulated slag powder is sent to the next process through a suction duct 31 in the upper part of the mill inside the mill by a suction fan 32.

Therefore, in order to maintain the suction negative pressure inside the mill, a double-structured mill gate valve 21, 22 is provided at the top of the cylindrical chute 17, which is the raw material input port, and two mill gate valves 21 and 22 are provided at the mill circulation port at the lower side of the mill table 15. Heavy structure Miltambor valve 33.3
4 are provided.

During operation, these valves are operated alternately to maintain negative pressure within the mill.

Next, installation of the above-mentioned deposit removing device will be explained.

A side inspection port 36 of the mill gate valve 21, 22 is opened, and a wire guide 37 having a guide roller 37a is provided at the lower end of the inspection port. A winch 39 is installed near the mill gate opening 25. Then, the wire lobe 40 from the winch is wound around the pulley 38 provided on the mill main body and the guide roller 37a, and the hanging member 2 of the removing device is tied to the tip of the wire lobe 40 from the mill gate opening 25.
It is suspended in the cylindrical chute 17.

When removing deposits, the hot air duct 30 is shut off by the shutoff valve 35, and the damper valves 33, 34 and the mill gate valves 21, 22 of the mill circulation port are shut off, and the blowing port into the mill during normal operation is closed. Turn everything off.

In this state, the suction fan 32 is operated to suck all the outside air through the mill gate opening 25 and generate a flow of air inside the cylindrical chute 17.

As a result, the hanging windmill 10 of the deposit removal device rotates, and the beating arm 12 is expanded by centrifugal force and continues to rotate while contacting the deposit 20 on the inner wall of the cylindrical chute 17. The deposits are scraped and removed.

At this time, the hitting arm 12 expands to accommodate the shape of the deposit to be removed, and acts to always position the removal device at the center of the opening, and when the deposit is sufficiently removed, the inner wall of the cylindrical chute 17 finally It hits the base material directly and completely removes the deposits.

The rotational force of the wind turbine 10 can be controlled depending on the situation by adjusting the opening degree of the suction damper valve 41 of the suction fan 32.

On the other hand, when cracks are created in the deposits by the pounding arm 12, the deposits are separated by the suction force and are carried into the mill one after another, and the pounding arm constantly scrapes and removes new skin. .

The removal device is placed at a fixed position inside the cylindrical chute 17, and once the deposits have been removed, the removal device is moved up or down by winch operation to gradually expand the removal range and cover the entire height of the cylindrical chute. Remove kimono.

Note that the above embodiment has been described with reference to the case where the beating arm is attached to the outer ring of the wind turbine, but the same effect can also be obtained by attaching a plurality of chains 42 to the outer ring 5 of the wind turbine, as shown in FIG. can be obtained.

In addition, as shown in FIG. 5, when a plurality of convex members 43 are equally distributed on the outer circumferential surface of the outer ring 5, when the windmill rotates and scrapes off the deposits, the windmill suspended by the wire rope It swings in the opposite direction due to the cutting reaction force. By repeating the rotational motion of the windmill and the swinging motion, the convex member can completely scrape off deposits attached to the inner wall of the cylindrical chute over the entire circumference.

In addition, although the above embodiment was applied to a blast furnace granulated slag drying and pulverizing equipment,
It can also be applied to cylindrical chutes of crushing equipment.

[Effects of the Invention] The device and method for removing deposits on the inner wall of a windmill-type cylindrical chute of the present invention are as described above, and by rotating the windmill in the cylindrical chute by passing wind, the beating arm provided on the outer ring of the windmill, The deposits can be removed up to the inner wall surface of the chute by a striking action of a chain or the like or by a scraping action of a convex member.

Then, by sequentially moving the removal device up and down,
It is possible to remove deposits over the entire height of the chute.

Therefore, compared to using conventional impact methods, compressed air or water jets, or concrete crushers,
Deposits can be removed efficiently and extremely safely without the need for special equipment.

[Brief explanation of the drawing]

1 and 2 are a perspective view and a cross-sectional view showing an embodiment of the apparatus of the present invention, FIG. 3 is an explanatory view showing an example of the configuration of the apparatus for carrying out the method of the present invention, and FIGS. 4 and 5 The figures are perspective views of other different examples of the removing device, and FIGS. 6 to 9 are explanatory diagrams of different conventional methods of removing deposits. 1... Support shaft 2... Hanging member 4... Bearing case 5... Outer ring 6... Vane member 12... Hitting arm 14... Claw 17... Cylindrical chute 20.
... Adhesive matter 42 ... Chain 43 ... Convex member 91
Figure Applicant's Representative Patent Attorney Takehiko Suzue 11g2 Figure Figure 7° Illustration

Claims (1)

[Claims] 1) A device for removing deposits attached to the inner wall of a cylindrical chute that provides the ventilation force necessary to rotate a windmill, which removes the tips of a plurality of blade members radially fixed to a bearing case. A windmill fixed to an outer ring, a plurality of striking arms provided swingably in a radial direction on the outer periphery of the outer ring of the windmill, and a hanging member provided at the top of a support shaft incorporated in the bearing case. A deposit removal device. 2) The deposit removal device according to claim 1, wherein a plurality of chains are attached to the outer periphery of the wind turbine outer ring. 3) The deposit removal device according to claim 1, wherein a plurality of convex members are provided on the outer periphery of the wind turbine outer ring. 4) The deposit removal device according to any one of claims 1 to 3 is rotated by a ventilation force within a cylindrical chute and moved up and down to remove deposits attached to the inner wall of the cylindrical chute. Characteristic deposit removal method.