JP2989154B2 - Refractory spraying equipment for blast furnace tapping gutters, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for spraying refractories such as a blast furnace tapping gutter in an ironworks.

[0002]

2. Description of the Related Art Conventionally, an apparatus as shown in FIGS. 6 to 8 is used for repairing a blast furnace tapping gutter.

[0003] The structure of this device is such that in Fig. 6, a spraying device e is attached to the tip of a boom d of a hydraulic shovel c for a refractory which is fed by a hose b from a refractory compressor a. As shown in detail in FIGS. 7 and 8 (a plan view of FIG. 7), the boom d
A first frame f for maintaining a horizontal posture regardless of the ups and downs of the boom d is attached to the end of the first frame f. A second frame g having a horizontal rail h is mounted on the first frame f with a hydraulic pressure around a pin i. A third frame k is provided rotatably so that the horizontal rotation position can be adjusted by the cylinder j, and a third frame k is provided so as to be horizontally moved by the moving means along the horizontal rail h of the second frame g. 36 from the center of the axis by rotating means
A rotation axis m that is rotated by 0 ° is provided, and a refractory material spray nozzle n is mounted below the rotation axis m. The spray nozzle n is a nut q screwed to a rod p around a pin o. The angle is fixed in a predetermined direction.

In this case, a method for repairing a blast furnace tapping gutter includes a method in which a mold 2 is installed inside a gutter 1 as shown in FIG. 9 (A), and an irregular refractory is poured into the gap. 9 (B)
As shown in the figure, the powdered refractory material is put into the material feeder 3 and pressure-fed by the compressor 4, water is added at the nozzle 5, and
A method of spraying on the inner wall surface is used.

However, recently, this method has been replaced with FIG.
As shown in FIG. 2C, a powdery refractory material previously kneaded in a mixer 6 to form a mud is pumped by a pump 7, and an air 9 and a hardener 10 are added by a nozzle 8 and blown onto the inner wall surface of the gutter 1. Attachment methods are being adopted. This method does not require the installation of a formwork as compared with FIG. 9 (A), so that the repair period can be reduced to about 1/3, and even when compared with FIG. Since the spray can be sprayed three times or more thick, there is an advantage that a large-scale repair with large damage can be performed.

A blast furnace tapping gutter has several blast furnaces (1 to 5) at one steelworks, and one blast furnace has 3 to 4 tapping gutters. It is desirable that the repair device can be used for any gutter even if it is different, and as shown in FIG. 10 (A), the hydraulic excavator c can be set so as to be able to run at right angles to the length direction of the gutter 1 or as shown in FIG. B)
And the iron plate 11 is laid on the gutter 1 as shown in FIG. 10 (C).
It is desirable that the repairing device can be set at any position according to the situation, such as by setting a repairing device on the iron plate 11, and spray repairing can be performed.

In FIG. 10, h is the horizontal rail shown in FIG.

[0008]

However, a blast furnace tapping gutter 1
11A is provided with a gradient as shown in FIG. 11 (A), in which hot metal 12 accumulates and slag 13 accumulates thereon, and the spray repair material is above and below the boundary 14. As shown in FIG. 11 (B), it is necessary to change the material into a portion X where the hot metal 12 enters and a portion Y where the slag 13 enters as shown in FIG.

When the material is sprayed on the gutter, the angle of the spray nozzle 15 is such that, as shown in FIG. Move the nozzle 15 in the length direction of 1 and spray it,
When spraying into the corner 1c of the gutter 1, the nozzle 15 is set to θ
When the side wall 1b is sprayed while being swung at an angle, the spray is made at a right angle to the wall surface as shown in FIG. When the longitudinal end face 1d of the gutter 1 is sprayed, the nozzle 15 is directed to the end face and the nozzle 15 is moved in the width direction of the gutter 1 as shown in FIG.

As described above, since the spray nozzle 15 sprays the spray material so as to be uniformly firm, the spray angle is set to the gutter 1.
It is desirable that the horizontal rail h can be horizontally rotated in the apparatus described in Japanese Patent Application Laid-Open No. 7-268423 cited in the section of the prior art. However, the rotation angle is limited due to the structure of rotating directly by the hydraulic cylinder j,
It cannot be directed in the direction of extension of the boom d, and the installation location of the device is restricted. Further, the floor surface of the apparatus is installed on an inclined surface, the horizontal rail h is parallel to the installed surface, and when the material of the spray material is blown off at the boundary between the hot metal 12 and the slab 13, the boundary surface 14 is horizontal. For this reason, it is not possible to accurately separate air at the boundary.

Further, the spray nozzle 15 has a rod p
Due to the semi-fixed mechanism that can be adjusted by the nut q screwed into the above, there is a drawback that the direction cannot be changed or the head can be shaken freely during the spraying operation.

[0012] In addition, as shown in Fig. 9 (B), this is an apparatus that pneumatically feeds powder, adds water at a nozzle portion and sprays the water, and is an old type that is not used at present.

[0013]

According to the present invention, in order to solve the above-mentioned problems, spraying can be performed regardless of where the spraying device is installed on the gutter, and the material of the spraying material can be changed. It is an object of the present invention to provide a refractory spraying device such as a blast furnace tapping gutter capable of accurately blowing the molten iron and the slab portion.

That is, according to the first aspect of the present invention, the frame is pivotally attached to the tip of the arm of the hydraulic working machine so as to be tiltable,
A horizontal rail is attached to the lower end of the vertical axis in the frame via a tiltable beam, and a traverse table is movably engaged with the horizontal rail, and a horizontally rotatable cylinder is attached to the traverse table. A material supply pipe for receiving the sprayed material from the material pump is inserted into the cylindrical body, and the lower part of the material supply pipe protruding from the lower portion of the cylindrical body is bent to one side. The nozzle is formed in a meandering part, the tip of which is oriented horizontally, a nozzle pipe curved 90 ° is rotatably connected to the tip, and a spray nozzle is provided at the tip of the nozzle pipe. I do.

According to a second aspect of the present invention, in the first aspect of the invention, a horizontal level sensor is mounted on a frame provided at a tip of an arm of the hydraulic working machine, and a frame tilt provided on the arm is provided by a signal of the horizontal level sensor. A hydraulic cylinder is operated to control the frame to be always horizontal regardless of the angle of the arm.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. FIG. 1A shows an entire embodiment of a refractory spraying apparatus such as a blast furnace tapping gutter according to the present invention, and FIG. 1B shows a state in which the direction of the nozzle in FIG. It shows a part.

In this embodiment, a hydraulic working machine applied to the present invention will be described using a hydraulic shovel.

The hydraulic excavator 20 has a revolving unit 20b which can be pivoted about an axis in the direction of an arrow above a traveling unit 20a, and a working machine comprising a boom, an arm and the like is provided on the upper surface of the revolving unit 20b. Have been.

That is, the base end of a boom 20c that can be raised and lowered is supported by a hydraulic cylinder 20d on the upper surface of the revolving body 20b, and the base end of an arm 20f that is rotatable by a hydraulic cylinder 20e is connected to the distal end of the boom 20c. In the case of a shovel, a working machine such as a bucket is attached to the tip of the arm 20f.

In the present invention, a frame 21 is connected to the tip of the arm 20f by a pin 22.
It can be tilted by a hydraulic cylinder 23 provided on the side.

As shown in FIG. 2, a longitudinal axis 24 is supported by bearings 25 and 25 in the frame 21, and is rotatable over an angle of 180 ° or more by a hydraulic motor 26 provided at an upper portion thereof.

A beam 27 is connected to the lower end of the longitudinal axis 24. One end of the beam 27 is connected to one side of a horizontal rail 28 by a pin 29, and a hydraulic cylinder 30 is attached to the other end of the beam 27. The rod of the hydraulic cylinder 30 is connected to the other side of the horizontal rail 28 by a pin 30a, so that the horizontal rail 28 can be tilted about the pin 29 by the expansion and contraction of the hydraulic cylinder 30.

As shown in FIG. 2 and FIG.
Reference numeral 8 denotes a U-shaped cross section. Rails 28a and 28b are vertically attached to the inside of the U-shape, and the traversing table 31 can be moved along the rails. That is, rotatable rollers 32a, 32b, 32
c is mounted, and rollers 32a and 32b
b, the roller 32c comes into contact with the rail 28a so that the traversing platform 31 can travel along the rail 28.

As shown in FIG. 4, the horizontal rail 28 has chain wheels 33a and 33b rotatably attached to both ends thereof, and is fixed to a shaft of a hydraulic motor 34 fixed at an intermediate position of the horizontal rail 28. Chain wheel 35
The chain 36 is wound between them, and the chain 3
6 are locked at both ends by an arm 37 fixed to the traversing table 31, so that the traversing table 31 can move to the left and right with respect to the horizontal rail 28 when the hydraulic motor 34 rotates. . The traverse table 31 has a bearing 39.
And a cylindrical body 38 that can be rotated 360 ° by a hydraulic motor 40 mounted on the traversing table 31.

The rotation of the cylindrical body 38 is achieved by a chain 43 wound between a chain wheel 41 fixed to the outer periphery of the cylindrical body 38 and a chain wheel 42 rotated by the hydraulic motor 40. Done through.

A material supply pipe 44 for feeding a material to be sprayed from a material pressure pump is inserted through the center of the cylindrical body 38, and is fixed by fixtures 45 and 46 provided above and below the cylindrical body 38, respectively. The material supply pipe 44 is fixed.

A curved pipe 48 is attached to the upstream side of the material supply pipe 44 via a rotary joint 47, and one end of a flexible hose 49 is connected to one end of the curved pipe 48. The other end of 49 is connected to the material feed pump 7 shown in FIG.

On the other hand, the downstream side of the material supply pipe 44 protruding from the lower part of the cylindrical body 38 is formed in a meandering part 50 that protrudes and curves to one side, and the tip part is directed in the horizontal direction, and A nozzle pipe 51 curved at 90 ° is rotatably connected via a rotary joint 52, and a spray nozzle 53 is attached to the tip of the nozzle pipe 51.

FIG. 3 shows one side of the upper part of the nozzle pipe 51.
As shown in (B), an arm 54 is fixed, and this arm 54 is connected to a hydraulic cylinder 55 attached to the upper part of the material supply pipe 44 by a rod 56 which penetrates vertically through the cylindrical body 38. Accordingly, the nozzle pipe 51 can be tilted at least in a range of approximately 90 °.

A pipe (57) for a binder (hardening agent) and a pipe (58) for an air are provided through the cylindrical body (38).
The upstream sides of both pipes are held by the fixing members 45 and 46 on the cylindrical body 38, and the upstream sides of both pipes are connected to a swivel joint 59 supported at a center position in the cylindrical body 38 by the material supply pipe 44. The air hose 60 projecting upward is connected to a compressor (not shown), and the hose 61 for binder is connected to a binder supply pump (not shown).

On the other hand, the binder pipe 57 penetrating the cylindrical body 38 and the downstream end of the air pipe 58 are connected to the spray nozzle 53 via a rubber hose 62.

Further, since the frame 21 is tilted following the tilting of the boom 20c and the arm 20f and the gradient of the ground contact surface of the hydraulic excavator 20, correction by the hydraulic cylinder 23 is required. In the correction in this case, a horizontal level sensor 63 is attached to the frame 21 as shown in FIG. 5, and the output signal thereof is controlled via an amplifier 64 to a switching valve 65 so that the hydraulic cylinder 23 is operated. .

Next, the operation will be described.

First, when the blast furnace tapping gutter 1 is spray-repaired, the apparatus is installed at an optimum position according to the situation around the gutter as shown in FIGS.

At this time, the installation surface has a slope as shown in FIG. 11, and the direction in which it is directed changes depending on the situation at the site.

The above-mentioned spray repair device is installed at an optimum position, the spray nozzle 53 is directed to the surface to be sprayed, and the distance between the spray nozzle 53 and the surface to be sprayed is adjusted to a desired size. After adjusting the direction of the horizontal rail 28 so that the horizontal rail 28 can move in a predetermined direction parallel to the surface to be sprayed, the horizontal rail 31 is sprayed while reciprocating, so that the horizontal rail 28 is sprayed regardless of the position of the apparatus body. It is important to precisely match the site. For example, 1) When spraying the laying surface 1a, the horizontal rail 28 is adjusted in parallel with the laying surface 1a in the longitudinal direction of the gutter 1. 2) When spraying the side wall surface 1b, the horizontal rail 28 is aligned parallel to the boundary surface 14 between the hot metal 12 and the slag 13. 3) When spraying the end face 1c, the horizontal rail 28 is adjusted horizontally to the end face direction of the gutter 1.

Preparations such as the above are required. As a result, the direction of the horizontal rail 28 can be adjusted to a desired direction by rotating the vertical axis 24 by the hydraulic motor 26 regardless of the orientation of the entire apparatus.
The inclination of 8 can be adjusted to a desired inclination by adjusting the hydraulic cylinder 25 regardless of the ground on which the entire apparatus is installed.

The spray nozzle 53 is oriented in the hydraulic cylinder 5
By tilting the nozzle pipe 51 at 5, the nozzle pipe 51 can be directed to the laying surface 1 a and the side wall surface 1 b shown in FIGS. 1 and 12, and the cylindrical body 38 is rotated by 360 ° by operating the hydraulic motor 40. The nozzle can be directed in any direction. In this case, the sprayed material is connected to the material supply pipe 44 from the material pump 7 through the flexible hose 49 and the curved tube 48 via the rotary joint 47 to the material supply pipe 44, and the cylindrical body 38. Through the center of the nozzle pipe 51 from the meandering part 50 to the nozzle pipe 51 via the rotary joint 52 to reach the spray nozzle 53 attached to the tip of the nozzle pipe 51, and each hose or pipe is filled with material. Can also be smoothly rotated by each rotary joint.

At this time, in order to perform the spraying shown in FIG. 9C, the powdered refractory material kneaded by the mixer 6 and made into a muddy state is pressure-fed from the material supply pump 7 to the spraying nozzle 53. Since the binder pipe 57 and the air pipe 58 are connected to each other, the spraying is performed by adding the air 9 and the curing agent 10 to the material at the time of spraying.

The spraying of the spray nozzle 53 while swinging it at the corner 1c or the like is made possible by reciprocating the hydraulic cylinder 55.

The height and position of the spray nozzle 53 are adjusted by turning the revolving unit 20b of the hydraulic shovel 20 and the boom 20c.
And by tilting the arm 20f.

Here, when adjusting the height, the boom 20
When the arm c and the arm 20f are tilted, the frame 21 also follows and tilts, whereby the material supply pipe 44 also tilts. That is, as shown in FIG. 5, the signal of the horizontal level sensor 63 provided on the frame 21 automatically controls the switching valve 65 via the amplifier 64, so that the frame 21 can always be kept in the horizontal position.

Although the present invention has been described with reference to the case where a hydraulic cylinder or a hydraulic motor is used as the drive source in the description of the above embodiment, the same operation can be achieved by using an electric cylinder or a motor with a speed reducer instead. Can be played.

[0044]

Since the present invention is constructed as described above, the following effects can be obtained. 1) The installation can be applied in any direction according to the situation at the site, and the spray nozzle can be operated in a desired direction even if the installation surface is a slope. 2) Heavy nozzle pipes and spray nozzles filled with blowing material can rotate smoothly, and the spray nozzles can be freely tilted even during operation, so that uniform and stable spraying is possible. . 3) According to the second aspect, even when the working machine is tilted, the frame provided with the spray nozzle can always be kept horizontal, so that the stability is improved.

[Brief description of the drawings]

FIG. 1 shows an entire appearance including a moving means of one embodiment of a refractory spraying apparatus such as a blast furnace tapping gutter according to the present invention,
(A) is a side view, (B) is the state figure which changed the inclination of the spraying part of (A).

FIG. 2 is an enlarged front view of the refractory spraying device shown in FIG. 1;

3A is an enlarged side view of a part of the refractory spraying device shown in FIG. 1, and FIG. 3B is a front view of a lower end portion of FIG.

FIG. 4 is a sectional view taken along line AA of FIG.

FIG. 5 is a circuit diagram showing control means by a frame tilting cylinder of the frame according to the present invention.

FIG. 6 is a side view of the entire external appearance of a conventional refractory spraying apparatus such as a blast furnace tapping gutter.

FIG. 7 is an enlarged side view showing a part spraying device part of FIG. 6;

FIG. 8 is a plan view of FIG. 7;

FIG. 9 shows a conventional method of repairing a blast furnace tapping gutter, and (A)
Is a casting method, (B) is a dry spray method, and (C) is a wet spray method.

FIG. 10 shows the arrangement of the refractory spraying device in the current repair of the blast furnace tapping gutter, where (A) shows the case where the horizontal level is perpendicular to the running direction of the vehicle, and (B) shows that the horizontal level is the running of the vehicle. (C) is an explanatory view of a case where the horizontal level is aligned with the vehicle traveling direction in the case of parallel arrangement in the direction.

FIG. 11 is an explanatory diagram of a current blast furnace tapping gutter use situation, (A)
3B is a side view, and FIG. 3B is a cross-sectional view of FIG.

12A and 12B are explanatory diagrams of the current gutter spray nozzle angle adjustment, and FIG. 12A shows the case of spraying a floor and a corner portion;
(B) is an explanatory view of the case of spraying the side wall, and (C) is an explanatory view of the case of spraying the end face in the longitudinal direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gutter 7 Material pressure pump 20 Hydraulic excavator 20a Traveling body 20b Revolving body 20c Boom 20f Arm 21 Frame 23 Frame tilting hydraulic cylinder 24 Vertical axis 27 Beam 28 Horizontal rail 31 Traversing table 38 Cylindrical body 44 Material supply pipe 50 Meandering part 51 Nozzle pipe 53 Spray nozzle 63 Horizontal level sensor

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F27D 1/16 B22D 11/10 310 B22D 41/02 C21B 7/14 304

Claims (2)

(57) [Claims] 1. A frame is pivotally attached to a tip of an arm of a hydraulic working machine so as to be tiltable, and a horizontal rail is attached to a lower end of a vertical axis in the frame via a tiltable beam. The traverse table is movably engaged with the traverse table, a horizontally rotatable cylindrical body is attached to the traverse table, and a material supply pipe for receiving a spray material from a material pressure pump is inserted into the cylindrical body. The lower part of the material supply pipe protruding from the lower part of the cylindrical body is formed into a meandering part that protrudes and curves to one side, and its tip portion is oriented in the horizontal direction, and the nozzle pipe curved 90 ° to the tip portion. Is connected rotatably and a spray nozzle is provided at the tip of the nozzle pipe. 2. A horizontal level sensor is mounted on a frame provided at an end of an arm of the hydraulic working machine, and a frame tilt hydraulic cylinder provided on the arm is operated by a signal from the horizontal level sensor to move the frame. 2. The refractory spraying apparatus for a blast furnace tapping gutter according to claim 1, wherein the apparatus is controlled so as to be always horizontal regardless of the angle of the arm.