JP3652636B2 - Suspended wet spray equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hanging wet spraying apparatus.
[0002]
[Prior art]
In a blast furnace or the like, as the operation is repeated, the inner wall is locally damaged due to wear or stripping. In such a case, in order to extend the life of the furnace, the damaged portion is repaired in a timely manner with an irregular refractory, and various wet spraying apparatuses have been developed for this purpose (for example, Japanese Patent Laid-Open No. Hei 11- No. 286707).
[0003]
In the case of repairing the inner wall of the shaft part of the blast furnace, the nozzle is usually suspended in the furnace via a swivel and suspension means so that the nozzle can be swiveled and the wet spray material is sprayed toward the repaired portion of the inner wall. However, prior to repairing with a wet spray material, a gas mixed with air and water is ejected from a nozzle for spraying the wet spray material to remove dust deposited on the inner wall surface of the furnace, so-called A process called “breathing” is performed.
[0004]
At the time of this air blowing, it is preferable to perform the nozzle in a slightly downward posture in order to blow off the accumulated dust. Moreover, when spraying the wet spray material, it is preferable to spray the nozzle in a horizontal posture in order to increase the adhesion rate of the wet spray material.
[0005]
[Problems to be solved by the invention]
However, in the conventional hanging type wet spraying device, the balance tip is adjusted in advance so that the tip of the nozzle is in a horizontal position when the wet spraying material is sprayed, so there is a wet spraying material in the pipe leading to the nozzle when blowing air. As a result, the tip end side of the nozzle became lighter and the nozzle turned upward, so that it was not possible to satisfactorily remove dust adhering to the inner wall of the furnace.
[0006]
For this reason, it is necessary to take the nozzle out of the furnace after the air blowing is finished and replace the balance weight, which is not only very troublesome work, but also requires a lot of time for the replacement, leading to a reduction in work efficiency. It was.
[0007]
The present invention pays attention to the problems in the above-mentioned conventional technology, and maintains the postures in which the nozzles are suspended in the air blowing and the wet spraying materials without taking out the nozzles outside the furnace, respectively, An object of the present invention is to enable easy and rapid conversion between air blowing and wet spraying.
[0008]
[Means for Solving the Problems]
As a means for solving the above problems, the present invention is a suspension type wet spraying method in which a spray nozzle is suspended in a furnace via a swivel suspension means, and a wet spray material is sprayed toward the inner wall of the furnace. In the apparatus, in the vicinity of the nozzle, a weight having a weight with the tip of the nozzle facing slightly downward is detachably provided when blowing, and the nozzle is placed in a horizontal posture when the wet spray material is sprayed after the weight is removed. It is characterized by that.
[0009]
Because of this, there is a weight in the vicinity of the nozzle when air is blown, so even if there is no wet spray material in the pipe leading to the nozzle, the nozzle faces slightly downward, and dust that adheres and accumulates on the inner wall of the furnace is removed. It can be removed well.
[0010]
Further, if the weight is removed after the air blowing is finished and the wet spray material is supplied, the nozzle is kept in a horizontal posture by its weight, and a good spraying operation can be performed.
[0011]
As the weight removing means, a weight placing tray is provided in the vicinity of the tip of the pipe communicating with the nozzle, the pipe is formed to be rotatable around its axis by the rotation driving means, and the pipe is rotated after the end of the blowing. In this mode, the weight on the weight mounting plate is dropped and removed, and a weight is supported near the tip of the pipe communicating with the nozzle by a pin, and the pin and the piston rod of the air cylinder installed at the rear part of the pipe are searched. It includes a mode in which the weight is dropped and removed by connecting with a strip and operating the air cylinder after pulling out the air and pulling out the pin through the strip.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings.
[0013]
FIG. 1 shows an outline of a suspension type wet spraying apparatus 1 (hereinafter simply referred to as a spraying apparatus) according to the present invention, and swivel suspension means 2 suspended by a plurality of wires in a furnace, and the swivel suspension means. 2 and a pipe 4 having a nozzle 3 for spraying at its tip, which is supported so as to be capable of swiveling, and as shown in FIGS. 4 to 7, a plurality of electric chain blocks installed outside the furnace 5 The wires 7, 7 ... are wound up and unwound by the machines 6, 6 ... so that the spraying device 1 can be placed at a desired height and position.
[0014]
The swivel and suspending means 2 has a box-structured body 8 and is suspended by suspending wires 7 and 7 on suspension parts 8a and 8a provided on the upper part of the body 8. One end of a material supply pipe 9 on the inlet side, which is a metal pipe such as a steel pipe bent at about 90 ° at the upper part of the main body 8, is rotationally connected to the upper end of a rotary joint main body 10 installed in the main body 8. The other end of the pipe 9 has a heat-resistant structure connected to a discharge port of a material pumping pump 12 (piston pump) that pumps the spraying material from a mixer 11 (see FIGS. 4 to 7) that is a supply source of the wet spraying material. A hose 13 is connected via a joint 14.
[0015]
A rotary member 15 is rotatably provided at the lower end of the rotary joint body 10, and the outlet side pipe 4 is bent at approximately 90 ° to the rotary member 15 in the same manner as the inlet side material supply pipe 9. The upper end of the part 4a is fixed.
[0016]
The nozzle 3 for spraying is connected to the other end (tip) of the pipe 4 on the outlet side via a joint pipe 16.
[0017]
On the other hand, an air motor 17 for turning and driving the outlet side pipe 4 including the nozzle 3 is mounted in the main body 8, and the air motor is placed in a chamber 9 partitioned by a partition wall 18 in the lower part of the main body 8. The output shaft 17a of 17 is projected, and the gear 20 on the output shaft 17a and the gear 21 formed on the outer periphery of the rotating member 15 are meshed with each other via an intermediate gear 22. The pipe 4 on the outlet side can be swung in a horizontal plane so that the nozzle 3 can be directed in an arbitrary direction.
[0018]
In the upper part of the main body 8, air piping 23 and 24 for introducing compressed air from the compressor into the joint pipe 16 near the air motor 17 and the nozzle 3 and blowing out the wet spray material by air pressure are inserted. Hose 25 is connected. Reference numeral 26 denotes an arrangement for supplying the additive in the immediate vicinity of the nozzle 3.
[0019]
In the present invention, a weight having a weight with the tip of the nozzle 3 facing slightly downward when air is blown is provided at a position near the nozzle of the pipe 4 so as to be removed.
[0020]
The embodiment shown in the figure shows a case where the weight is removed and removed by remote control. In the embodiment shown in FIG. 2, the pipe 4 is separated back and forth at a position close to the bent portion 4a of the base of the pipe 4. Then, the tip side pipe 4B is connected to the base side pipe 4A by a rotary joint 27, and the tip side pipe 4B is rotated by a predetermined angle as indicated by an arrow Y by an actuator 28 supported by the base side pipe 4A. It is like that. The rotation driving means may use driving means other than the actuator.
[0021]
A weight mounting tray 29 is fixed on the outer surface of the distal end side pipe 4B near the nozzle 3 so that the weight 30 can be stably mounted on the weight mounting tray 29. The weight 30 is configured to slide down from the weight mounting tray 29 when the distal end side pipe 4B is rotated by a required angle.
[0022]
A weight support rod 31 is extended behind the base side pipe 4A, and a balance weight 32 is attached to the weight support rod 31.
[0023]
In the embodiment shown in FIG. 3, the distal end pipe 4B of the pipe 4 is not rotated with respect to the base side pipe 4A, and weight attachment seats 33, 33 are provided on the lower surface side of the distal end side of the distal end side pipe 4B near the nozzle 3. A protrusion 30a on the upper surface of the weight 30 is fitted between the weight attachment seats 33 and 33 so as to protrude from the weight attachment seats 33 and 33, and the weight attachment seats 33 and 33 and the protrusion 30a of the weight 30 straddle the pins. By inserting 34, the weight 30 is suspended and supported by the distal end side pipe 4B.
[0024]
A rear end of the pin 34 and a piston rod 35a of an air cylinder 35 supported by the base side pipe 4A are connected by a rope 36 such as a wire. The air cylinder 35 is remotely operated to connect the piston rod 35a. By retracting, the rope 36 can be pulled in the direction of the arrow in FIG. 3 and the pin 34 can be pulled out from the protrusion 30a of the weight 30 so that the weight 30 can be dropped.
[0025]
1 and 2 are given the same reference numerals, and detailed description thereof is omitted.
[0026]
4 to 7 show the use state of the spraying device 1 according to the present invention. In each figure, 5a and 5a are closed at the upper shoulder of the furnace 5 and are openings for passing the wires 7 and 7, 37 is Frames 5b and 5b for setting the spraying device 1 are openings (hereinafter referred to as manholes) for passing the spraying device 1 and hoses, 38 is a frame for mounting the mixer 11 and the material pressure pump 12 and the like, 39 is An air-blowing compressor, 40 indicates the water pump, and 41 and 42 indicate hoses for connecting them to the spraying device 1.
[0027]
Next, the operation will be described.
[0028]
FIG. 4 shows a situation where air blowing is performed prior to the spraying of the wet spray material. At the time of this air blowing, the spraying device 1 is placed on the gantry 37, the hose 13 connected to the joint 14 of the material supply pipe 9 of the swivel suspension means 2 is removed, and the joint 14 is connected to the joint 14 from the water pump 40. The hose 41 from the air compressor 39 to which the hose 42 is joined is connected, and all the wet spraying material remaining in the pipe 4 is discharged by air blowing, while the weight 30 is supported at the tip of the pipe 4B. .
[0029]
After setting in this way, the spraying device 1 is suspended in the furnace 5 by the wires 7 and 7 as shown in FIGS.
[0030]
Thus, the nozzle 3 of the spraying device 1 suspended in the furnace 5 takes a posture facing slightly downward due to the load by the weight 30, and water that is pumped from the water pump 40 and compressed air that is pumped from the air compressor 39. The gas mixture is sprayed through the nozzle 3 toward the repaired portion of the inner wall surface of the furnace 5, and the dust deposited on the repaired portion is blown off for cleaning and moisture is given to the repaired portion.
[0031]
When the air blowing is completed as described above and the process shifts to the spraying construction using the wet spraying material, the weight 30 supported by the spraying device 1 is removed.
[0032]
For removal of the weight 30, the hoisting machines 6 and 6 are operated so that the tip side pipe 4B including the nozzle 3 protrudes from the manhole 5b of the furnace 5 to the outside of the furnace, and in this state, the weight 30 is removed by human power. However, when the spraying device 1 is the embodiment shown in FIG. 2, the hoisting machines 6 and 6 are operated to control the suspension position of the spraying device 1 by the wires 7 and 7, as shown in FIG. The front end side pipe 4B including the nozzle 3 is protruded from the manhole 5b of the furnace 5 to the outside of the furnace 5, and in this state, the actuator 28 is remotely operated to rotate the front end side pipe 4B by a required angle, and on the weight placing plate 29 The weight 30 is dropped outside the furnace 5. In these cases, the weight 30 can be collected and reused.
[0033]
In the case of the embodiment of the spraying device 1 shown in FIG. 3, the weight 30 is obtained by remotely operating the air cylinder 35 in the state where the air blowing has been completed in the same manner as described above, pulling the rope 36 and removing the pin 34. Is dropped into the furnace 5.
[0034]
After the weight 30 falls off, after connecting the hose 13 from the material pressure pump 12 to the material supply pipe 9 of the spraying device 1 as shown in FIG. 7 and setting so that the wet spraying material is supplied to the nozzle 3 The hoisting machines 6 and 6 are operated to control the suspension position of the spraying device 1 and spraying with a wet spraying material is performed so that the nozzle 3 faces the repaired portion of the inner wall surface of the furnace 5.
[0035]
At this time, since the weight 30 does not exist, the nozzle 3 is oriented in the horizontal direction due to the balance between the weight of the wet spray material supplied into the pipe 4 and the balance weight 32, so that the wet spray material can be sprayed well. Can be done.
[0036]
【The invention's effect】
As described above, according to the present invention, since the suspension type wet spraying apparatus can be immediately transferred from the air blowing to the wet spraying material without taking out the outside of the furnace, there is no loss time and the work efficiency is greatly improved. Improvements can be made.
[0037]
In addition, according to claims 2 and 3, since the weight for loading the nozzle downward at the time of air blowing can be shifted to the wet spraying construction without dropping manually, workability can be affected. Absent.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view showing an outline of a hanging wet spraying apparatus according to the present invention.
FIG. 2 is a side view showing an embodiment of a suspended wet spraying apparatus according to the present invention.
FIG. 3 is a side view showing another embodiment of the present invention.
FIG. 4 is an explanatory diagram showing a mode of shifting from a preparation stage at the time of air blowing to an air blowing posture.
FIG. 5 is an explanatory view showing an aspect during air blowing.
FIG. 6 is an explanatory view showing an aspect when the weight is removed by human power.
FIG. 7 is an explanatory view showing an aspect at the time of spraying the wet spray material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Suspension type wet spraying apparatus 2 Swing suspension means 3 Spray nozzle 4 Pipe (4A base side pipe, 4B tip side pipe)
4A Base side pipe 4B End side pipe 5 Furnace 6 Hoisting machine (Electric chain block)
7 Wire 9 Material supply pipe 12 Material pump 17 Air motors 23 and 24 Air piping 28 Actuator 29 Weight loading tray 30 Weight 32 Balance weight 33 Weight attachment seat 34 Pin 35 Air cylinder 36 Strip 39 Air compressor 40 Water pump

Claims (3)

In a suspended wet spraying apparatus in which a spray nozzle is suspended in a furnace via a swivel suspension means, and a wet spray material is sprayed on the nozzle tip toward the inner wall of the furnace. A suspension type wet spraying device characterized in that a weight having a weight with the tip of the nozzle facing slightly downward is detachably provided, and the nozzle is placed in a horizontal position when the wet spraying material is sprayed after the weight is removed. A weight mounting tray is provided in the vicinity of the tip of the pipe communicating with the nozzle, the pipe is formed so as to be rotatable around its axis by rotation driving means, and the pipe is rotated on the weight mounting tray after the end of blowing. The suspension type wet spraying apparatus according to claim 1, wherein the weight is removed and removed. A weight is supported by a pin in the vicinity of the tip of the pipe communicating with the nozzle, and this pin and a piston rod of an air cylinder installed at the rear part of the pipe are connected by a rope. The suspension type wet spraying device according to claim 1, wherein the weight is dropped and removed by pulling a pin through the rope.

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