JP3060175B2 - Surface layer peeling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer surface layer of a large-scale chimney, a flue, a combustion chamber of a steel furnace, a large-scale combustion furnace, or the like, or an exterior surface layer attached to a vertical wall of a building or a concrete structure. The present invention relates to a technique for peeling a surface layer, which is useful in re-stretching and repairing a surface layer.

[0002]

2. Description of the Related Art A large chimney wall has a reinforcing steel wall 75 to 100 m inside a steel-strength wall strength layer having a thickness of about 10 mm.
m Put a square grid-shaped wire mesh and put refractory material 35
It adheres to a thickness of ~ 200 mm to form the inner surface layer. The surface layer of the refractory material is degraded when used, so that the surface layer is peeled off, and repairs for newly constructing the surface layer are performed regularly and irregularly. Conventionally, the surface layer of this large chimney was separated by making a scaffold inside the chimney, and using a breaker / picker on the scaffold to crush and separate the surface layer by drilling and vibration. It had been cut and removed with a cutting machine. In this conventional method of peeling a surface layer, a breaker
Since the picker is used, the worker in the chimney receives extremely high noise, has a lot of dust, and has a poor working environment in which the worker suffers from leprosy due to vibration. Also, high noise was given to the outer periphery of the chimney, which inconvenienced nearby people. Further, since the breaker and the picker are heavy, the labor burden of a person working with the breaker and the picker is large.

[0003]

The problem to be solved by the present invention is to solve these conventional problems, to greatly reduce noise and vibration, to generate less dust, to be easy to work, and to reduce labor. It is an object of the present invention to provide a method for peeling off a surface layer of a wall surface, which can reduce the burden of the surface.

[0004]

Means for Solving the Problems The constitution of the present invention which has solved the above problems is as follows: 1) In a method for separating a surface of a wall having a structure in which a surface is adhered to the surface of a wall strength layer which bears the strength of a building by a different material. ,
The wall surface is cut by a cutting machine in a lattice shape at a depth close to the wall strength layer, and the wall surface is cut into small area sections by the cut grooves, and then the surface portion of each section area is peeled off from the wall strength layer. A method of peeling a surface of a wall characterized by peeling the entire surface of the wall 2) The wire is a vertical surface, and a wire winder for offsetting the weight of an article in which a cutting machine for cutting with a rotary blade is suspended at a lower end of the wire. A method for separating a surface layer on a wall according to the above 1), in which the groove is formed by moving vertically and horizontally while being suspended and supported by a type balancer 3) A fountain nozzle that sprays water toward a cutting point of a cutting machine, and scatters The method for separating a surface of a wall according to the above 1) or 2), wherein a shatterproof body for preventing water from spreading to the outer periphery is attached to the cutting machine. 4) The wall has a fireproof surface on the inner surface of the wall strength layer of the iron skin. Of a chimney or flue with thick material Wherein a surface 1) to 3) in the surface layer peeling method of the wall according to any one. The cutting machine of the present invention may be a rotary blade, a chainsaw type, a saw blade reciprocating type mechanical cutting machine that operates using pneumatic, hydraulic, or electric power as a driving source, or a machine that cuts with high pressure water jet water. It is a thing.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a cutting machine of the present invention, a widely used pneumatically operated rotary blade cutting machine is used, which is small, inexpensive and easy to use. It is preferable that a water fountain is sprayed toward the rotary blade, and that a water scattering prevention member be attached. In the cutting machine of the present invention, it is preferable to use a wire winding type balancer using a spring capable of substantially canceling the weight of an article hung on a wire by a spring force and adjusting a vertical hanging position by wire winding. . It can be hung on this and held at a predetermined height, and it is possible to move up and down by applying a light force up or down, so it is not necessary to support the cutting machine by hand, so the labor of cutting work can be greatly reduced, Moreover, it is preferable because the cutting operation can be performed quickly. The depth of the kerf by the cutting machine is determined by the structure of the wall surface of the building, and it is cut to near the wall strength layer that is responsible for the strength of the building. It is preferable to use a reinforcing bar, a wire mesh, or the like inside the surface layer, because cutting with a cutting machine together removes the surface layer block of the partitioned area as it is. The area and shape of the sectioned area cut by the cutting machine are also determined to appropriate dimensions and shapes depending on the wall surface and surface layer, but usually rectangular and square grids are formed by forming horizontal and vertical cut grooves. To The length of one side of the grid varies depending on the thickness of the surface layer and the like, but is generally about 10 to 40 cm. In the method of peeling off the surface layer portion of the partitioned region, the surface layer portion (block shape) is peeled off from the wall strength layer by inserting the burl into the cut groove and lowering it multiple times.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is a large-scale chimney having a surface layer formed by arranging a reinforcing bar and a wire mesh inside a 9 mm-thick steel shell as a wall strength layer and spraying a refractory material with a thickness of about 100 mm so as to bury the reinforcing bar. It is an example of the surface layer peeling method. Example of using a pneumatic cutting machine that rotates the rotary blade at high speed by air pressure, suspending this with a wire take-up balancer, and attaching a fountain nozzle and a scattering prevention body near the rotary blade It is. FIG. 1 is an explanatory diagram of a kerf forming step according to the embodiment. FIG. 2 is an explanatory diagram of a step of peeling off the surface layer portion of the partitioned area according to the embodiment. FIG. 3 is a cross-sectional view of a wall surface in a state after the surface layer is peeled off in the example. FIG. 4 is an explanatory diagram illustrating a crushing process of the surface layer portion of the stripped partitioned area according to the embodiment. FIG. 5 is a front view showing the cutting machine of the embodiment. FIG.
1 is a side view showing a cutting machine according to an embodiment. FIG. 7 is an explanatory view showing a fountain nozzle and a scattering prevention body of the cutting machine according to the embodiment. FIG. 8 is an explanatory diagram illustrating a working state of the embodiment. In the figure, C is a large chimney, W is the wall surface of the large chimney, and Wa is 9 m.
Wb is a 100 mm thick refractory surface layer, Wc is a reinforcing bar in the surface layer, Wd is a grid metal mesh having a 90 mm square side in the surface layer, We is a kerf,
Wf is the surface portion of the partitioned area. In the drawing, 1 is a cutting machine, 1a is a rotary blade, 1b is a handle portion having a built-in air motor for rotating the rotary blade, 1c is a protective casing on which the rotary blade 1a is mounted, 1d is a guide wheel, and 1e is a protective casing. Wire hanging rod protruding in a U-shape from 1c, 1f, 1g
Is a wire suspension, 1h is an air hose, 1i is a rotary blade 1a
A fountain nozzle for jetting water in the rotational feed direction on the outer periphery of the fountain nozzle, 1j is a water supply hose to the fountain nozzle 1i, and 1k is a rubber scattering prevention member. In the drawing, reference numeral 2 denotes a wire winding balancer using a spring having a balancer function of suspending and holding at a fixed height, releasing the height holding by applying a light force upward and downward and releasing the height, and a balancer 2a. 2b is a connecting hook at the lower end of the wire, 2c is a suspending hook for holding the winch 2, 2
Reference numeral d denotes a horizontal rod provided above a scaffold 3 for holding the winch 2 horizontally, reference numeral 3 denotes a gondola-type scaffold suspended in a chimney C, and reference numeral 4 denotes a bar for peeling work. In this embodiment, a gondola-type scaffold 3 is suspended in a chimney C, and a horizontal horizontal rod 2d is provided above the gondola-type scaffold. A balancer 2 having a balancer function on the horizontal rod 2d via a hanging hook 2c.
Install. The suspension hook 2c of the balancer 2 is movable along the horizontal rod 2d. The connecting hook 2b at the lower end of the wire 2a of the balancer 2 is connected to a cutting machine 1
The cutting machine 1 is hung by the balancer 2 on the wire hanging portion 1f of the U-shaped wire hanging rod 1e.
Approximately cancels out the weight, so that it can be moved up and down with a light force. In this state, the cutting machine 1 is operated, and the rotary blade 1a is rotated while water is sprayed from the fountain nozzle. The revolving blade 1a of the cutting machine 1 is made vertical, and the refractory material of the surface layer Wb and the rebar W are formed at a depth close to 100 mm while rotating the rotating blade 1a from above.
c, cut the wire netting Wd. By spraying water from the fountain nozzle 1i to the rotary blade 1a of the cutting portion, burning and overheating of the rotary blade are prevented, and the cut chips are absorbed so as not to be scattered so as to be muddy. Water and chips are prevented from being scattered by a rubber scatter prevention body 1k on the opposite side (see FIGS. 1 and 7). The scaffold 3 is positioned at a predetermined height, and vertical kerfs We are first formed at predetermined intervals. Thereafter, the cutting machine 1 is leveled, the connecting hook 2b is re-hung on the wire hanging portion 1e of the wire hanging rod 1e, and the balancer 2 is horizontally slid along the horizontal rod 2d while the cutting machine 1 is horizontal. As a result, a horizontal kerf We is formed. The surface layer Wb is sectioned into a rectangular body having a side of about 35 cm by the vertical and horizontal grooves We (see FIG. 1B). Thereafter, the burl 4 is cut into the kerf We.
And the bar 4 is tilted down to peel off the surface layer portion Wf of the partitioned area from the wall strength layer Wa of the steel shell. The wall strength layer Wa can be easily peeled off by the burl 4 (see FIG. 2). The peeled surface layer portion Wf has a weight that can be held by hand, and can be easily removed and moved. The peeled surface layer portion Wf is carried out of the chimney C, is crushed, and is broken into pieces of refractory material, reinforcing bar Wc, wire mesh. It is separated into Wd and discarded (see FIG. 4). The steps of forming, separating, and removing the kerf We are performed while lowering the scaffold 3 from above the wall surface W inside the chimney C, and the entire surface layer Wb of the wall surface W is separated. In this embodiment, since the cutting machine 1 is used, the noise and vibration are suppressed to be much lower than those of the breaker and the picker, the generation of dust is small, and the fountain from the ejection nozzle 1i and the scattering prevention body 1k are used. The generation of dust is small due to the presence of. In addition, the noise around the chimney C was not a problem because it was about the background noise.

[0007]

As described above, according to the present invention, since the cutting step is a step of providing a grid-shaped kerf using a cutting machine and peeling off the surface layer of a small partitioned area, noise and noise are reduced. Vibration and dust generation can be greatly reduced, the work environment is improved, noise around the surroundings is eliminated, and surface layer separation is facilitated. In particular, if a balancer is used, the use and operation of the cutting machine become easy, and the burden of labor can be reduced. If a body for preventing water spray and scattering by a fountain nozzle is attached to the cutting machine, generation of dust can be further reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a kerf forming step of an embodiment.

FIG. 2 is an explanatory diagram of a step of peeling a surface layer portion of a partitioned area according to the embodiment.

FIG. 3 is a cross-sectional view of a wall surface after a surface layer is peeled off in the example.

FIG. 4 is an explanatory view showing a crushing process of a surface layer portion of a stripped section area according to the embodiment.

FIG. 5 is a front view showing the cutting machine of the embodiment.

FIG. 6 is a side view showing the cutting machine of the embodiment.

FIG. 7 is an explanatory view showing a fountain nozzle and a scattering prevention body of the cutting machine according to the embodiment.

FIG. 8 is an explanatory diagram showing a working state of the embodiment.

[Explanation of symbols]

 C Large Chimney Stack W Wall Wa Wall Strength Layer Wb Surface Wc Reinforcing Bar Wd Wire Mesh We Cut Groove Wf Surface Layer 1 Cutting Machine 1a Rotating Blade 1b Handle 1c Protective Casing 1d Guide Wheel 1e Wire Hanging Rod 1f, 1g Wire Suspension 1h Air Hose 1h Nozzle 1j Water supply hose 1k Anti-scattering body 2 Balancer 2a Wire 2b Connecting hook 2c Hanging hook 2d Horizontal rod 3 Scaffolding 4 Bar

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04G 23/02 E04G 23/08

Claims (4)

(57) [Claims] 1. A method for separating a surface of a wall having a structure in which a surface is adhered to the surface of a wall strength layer that bears the strength of a building by a different material, wherein the wall is lattice-shaped to a depth close to the wall strength layer by a cutting machine. A wall surface is divided into small areas by the grooves, and then the surface layer of each partition area is peeled off from the wall strength layer to peel off the entire surface layer of the wall surface. Method. 2. A grid which has a vertical wall surface and which is vertically and horizontally moved while a cutting machine for cutting with a rotary blade is suspended and supported by a wire winding type balancer which suspends the weight of an article suspended at the lower end of a wire. The method for peeling a surface layer from a wall according to claim 1, wherein the groove is provided in a shape. 3. The cutting machine according to claim 1, further comprising a fountain nozzle for spraying water toward a cutting point of the cutting machine, and a scatter prevention body for preventing scattered water from spreading to the outer periphery. The method of peeling the surface of the wall. 4. The method according to claim 1, wherein the wall is a wall of a chimney or a flue in which a refractory material is attached as a thick surface on the inner surface of a wall strength layer of a steel skin.