JP2002030813A - Removing method and device for buried asbestos pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for removing an asbestos pipe being a bath heater combustion exhaust pipe buried in the building frame before breakup work of the whole multiple dwelling houses built in olden years. SOLUTION: Compartments being a closed space cut off from the atmosphere and also serving as a work section are vertically arranged in a rooftop opening part and a lower bathroom opening part of this buried asbestos pipe including the asbestos pipe, and after putting the closed space under negative pressure more than atmospheric pressure by operation of a negative pressure dust collector with a hepafilter placed in the lower compartment, a tip tool composed of a motor, a universal joint, a tool holder and a tool is inserted from the rooftop asbestos pipe opening part, and is operated, and the buried asbestos pipe is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application] Asbestos pipes, which are bath kettle combustion exhaust pipes buried inside a concrete skeleton, are collected in an apartment house of an old age. Method and device for removing and removing without releasing to the atmosphere

[0002]

2. Description of the Related Art Asbestos pipes 1 embedded in a concrete body
Is individually raised from the back of the bathroom combustion kettle to the rooftop exhaust outlet for each dwelling, but when removing it, it is buried using a breaker or a pick, etc., with concrete covered in cover. Although the method of removing asbestos pipe was used, it is difficult to remove the part penetrating through the thick concrete slab, and the method of completely shielding the workplace from the atmosphere and adopting the method of partitioning However, there was a problem. Recently, a method using an ultra-high pressure water jet has begun to be used, but there is a problem in the treatment of used water.
Furthermore, the water jet broke the asbestos pipe wall, opening an opening in the atmosphere, and there was a problem of asbestos scattering.

[0003]

A method and an apparatus for removing and removing the asbestos tube 1 before dismantling a house without danger of asbestos being scattered or released into the atmosphere are provided to solve the conventional problems.

[0004]

[Means for Solving the Problems] The roof rising part of the asbestos pipe 1 opens inside the upper compartment 2 and
The lower end of the asbestos tube 1 is opened inside the lower compartment 3, and furthermore, both compartments having a zippered entrance 8 are installed so as to be connected to the entire asbestos tube 1 and form an integrated system shielded from the atmosphere. , Work area 2. Inside the lower compartment 3 is installed a negative pressure dust collector 4 with a hepa filter used for ordinary asbestos treatment and having a processing air volume several to ten times as large as the amount of compressed air used for the work. 2. An exhaust port is provided in the atmosphere from the lower compartment 3 through the exhaust duct 9 from the exhaust port. Inside the upper compartment 2, a wound compressed air supply hose 5 and a winch 6 are installed. At the tip of the hose 5, a motor 7a, a universal joint 7b, and a tool that rotate around the central axis of the asbestos tube 1 are provided. Body 7
c, and a tip tool 7 composed of a tool 7d is mounted,
3. integrated with hose and connected to winch 6 The tool body 7c of the tip tool 7 has a spindle shape, a plurality of detachable tools 7d having a plurality of peaks and grooves parallel to the spindle center axis, and rotating around the spindle center axis.
At the same time, the tool 7d is attached to the tool body 7
When the centrifugal force acts, the tool 7d is attached to the tool body 7c which can swing so that the outside rotation diameter is equal to or slightly larger than the outside diameter of the asbestos tube 1. The center of the dynamic rotation axis is made parallel to the rotation axis of the tool body 7c, or inclined so as to be tilted within a downward elevation angle of 20 degrees, and the tool 7d can be attached to and detached from the shaft provided on the part which swings and expands and contracts. 4. The swing axis of 7c and the central axis (rotation axis) of 7d are almost parallel. In carrying out the method for removing and removing buried asbestos pipes according to the present invention, the following equipment and devices are usually required for asbestos treatment work: a) Air pick or electric pick ro) Vacuum cleaner (with hepa filter) C) Deconerator unit d) Air shower e) Protective clothing (gloves, work shoes, helmet, curing tape, etc.) d) Protective mask

[0005]

[Action] The upper compartment 2 and the lower compartment 3 connect the asbestos tube 1 up and down and communicate inside,
It forms a space that is isolated from the atmosphere.
By the operation of, the internal air is discharged into the atmosphere from the internal space formed through the hepa filter and the exhaust duct 9, so that the internal pressure becomes lower than the atmospheric pressure, so that asbestos dust generated during the operation is reduced. In order to prevent the air from being released into the atmosphere from the newly formed space, the vacuum cleaner 4 is several to ten times as large as the capacity of the compressed air used for the tool bit 7 during operation. Since it has a processing air flow capacity, the internal negative pressure is sufficiently maintained even during work, thereby preventing the danger of asbestos dust being released into the outside atmosphere. The negative pressure dust collector 4 installed in the lower compartment 3 not only keeps the work space at a negative pressure, but also captures and removes asbestos dust present in the internal air with a hepa filter to clean the air in the work place. Yes 3 The tip tool 7 lowered into the inside of the asbestos tube 1 by the winch 6 is supplied with a motor 7 by compressed air supplied from the hose 5.
a rotates at high speed through the universal joint 7b,
By turning the tool body 7c, the tool 7d rotates at a high speed around the central axis of the asbestos tube 1 and expands the diameter of rotation by centrifugal force. Meanwhile, by continuing the rotation of the satellite, it collides with the asbestos tube 1 and repeatedly applies a striking action and a crushing / crushing action to move up and down the inside of the asbestos pipe 1 and remove / remove the asbestos pipe 1 itself. The spindle-shaped tool 7d has a structure in which the surface of the tool 7d repeats peaks and grooves, and when it hits the asbestos tube 1, the impact force concentrates on the tube wall where the impact force is limited, so that the breaking / crushing action is enhanced. 4. Collision and impact per unit time due to collision while rotating, resulting in increased destruction / crushing action. 5. Since the rotation diameter is increased by the centrifugal force of the tool 7d beyond the outer diameter of the asbestos tube 1, the asbestos tube 1 can be removed and removed without delay. The power source of the motor 7a does not need to be limited to compressed air, but can be applied to hydraulic pressure, electricity, water pressure, and the like. The universal joint 7b smoothly transmits the power and rotation from the motor 7a to the tool body 7c, and also allows the tip tool 7 to follow the slight bending of the asbestos tube 1 so that it can easily pass through the inside, and simultaneously swings the tool body 7d. 7. By causing the phenomenon, a strong and large impact force is consequently given to the asbestos tube 1 to dramatically increase the removing / removing action. The above-mentioned (means for solving the problems) the equipments and devices mentioned in the item 5 are used at the time of ordinary asbestos treatment method construction, and will be described in the item of the Examples.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described with reference to the drawings. FIG. 1 shows an outline of a method of removing and removing the buried asbestos pipe. Normally, compressed air supplied from an air compressor installed on the ground is taken up by a hose 5 into an upper compartment 2 by winding the hose to an appropriate length. First, the tip tool 7 is mounted, and the entirety of the winch 6 is attached to the upper portion of the asbestos tube 1 in the upper compartment 2 just above the opening.
While operating, the inside of the asbestos pipe 1 is moved up and down, and the buried asbestos pipe 1 is removed and removed. Before starting the work, the negative pressure dust collector 4 is installed in the lower part of the asbestos pipe 1. The exhaust duct 9 is provided with a lower compartment 3 connected to the outside air. The lower compartment 3 is integrated with the upper compartment 2 through the asbestos pipe 1 to constitute a work space cut off from the atmosphere. Start the operation and keep the inside of the work space system at a negative pressure from the atmospheric pressure. Next, the bottom of the asbestos pipe 1 is removed using an air pick or the like to remove the cover concrete, the opening is exposed, and the inside of the lower compartment 3 is opened. Both compartments have a zippered doorway 8 for worker access. FIG. 2 shows a state in which the tip tool 7 is inserted into the asbestos tube 1 and, at the same time, a state in which the rotation diameter is expanded to the outer diameter of the asbestos tube 1. FIG. 3 shows a tool 7d attached to a tool body 7c.
D. Fig. 4 shows a structure in which the tool 7d attached to the swinging part of the tool 7c has a centrifugal force to expand the rotation diameter. Fig. 5 shows a decon unit installed close to the entrance of the lower compartment 3 and shielded from the atmosphere, and an air shower installed inside it. The decon unit has four entrances and exits, including the lower compartment 3 and other intermediate partitions, which are necessary for workers wearing protective clothing and masks when entering and exiting, and for vacuum cleaners and other work. It becomes a loading / unloading port for equipment etc.

[0007]

Advantages of the invention Provide safe work methods that do not release asbestos dust that is harmful to health into the atmosphere. Since the tool 7d has a spindle shape, the to-be-removed object is gradually contacted with the mountain-like tooth surface and is destroyed.
The removal effect is ensured. Also, if it is worn or damaged, it can be replaced because it is removable. Since the center axis of rotation of the tool body 7c and the center axis of the swing mechanism of the tool 7d attached to the tool body 7c oscillate while maintaining a downward elevation angle of 20 degrees or less, the center axis of rotation of the tool 7d is also substantially the same. At the same time as it rotates in parallel with the swing center axis,
The circumferential rotation of the asbestos tube 1 with respect to the central axis of the asbestos tube 1 causes the asbestos tube wall to rotate obliquely at an angle into the asbestos tube wall and break, thereby increasing the destruction effect. Since the tool 7d is made to have a slightly larger diameter of rotation than the outer shape of the asbestos tube 1 even when the tool 7d is expanded to the maximum by centrifugal force, the surrounding concrete is severely damaged and an opening is opened to the atmosphere. Avoid accidents of asbestos dust release into the atmosphere

[0008]

[Brief description of the drawings]

FIG. 1 shows the general concept of a method for removing and removing a buried asbestos pipe according to the present invention, in which a vertical section of a buried asbestos pipe part of an apartment house and compartments, hoses, tip tools and the like installed above and below it. Conceptual representation of components

FIG. 2 shows a configuration of a tip tool 7 attached to a hose 5 inserted into a buried asbestos tube 1 (vertical cross section at the center).

FIG. 3 is a cross-sectional view (AB) perpendicular to the spindle center axis at the spindle-shaped center of the tool 7d.

FIG. 4 is a view of the tool body 7c as seen in the direction of arrows CD.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Asbestos pipe 2 Upper compartment 3 Lower compartment 4 Negative pressure dust collector 5 Hose 6 Winch 7 Tip tool 8 Doorway 9 Exhaust duct

[Procedure amendment]

[Submission date] September 14, 2000
4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 shows the general concept of a method for removing and removing a buried asbestos pipe according to the present invention, in which a vertical section of a buried asbestos pipe part of an apartment house and compartments, hoses, tip tools and the like installed above and below it. Conceptual representation of components

FIG. 2 shows a configuration of a tip tool 7 attached to a hose 5 inserted into a buried asbestos tube 1 (vertical cross section at the center).

FIG. 3 is a cross-sectional view (AB) perpendicular to the spindle center axis at the spindle-shaped center of the tool 7d.

FIG. 4 is a view of the tool body 7c as seen in the direction of arrows CD.

Fig. 5 Floor plan of a decon unit normally used for asbestos treatment

[Description of Signs] 1 Asbestos pipe 2 Upper compartment 3 Lower compartment 4 Negative pressure dust collector 5 Hose 6 Winch 7 Tip tool 8 Doorway 9 Exhaust duct

Claims (3)

[Claims] 1. A removing method for removing and removing an asbestos pipe 1 buried in a concrete skeleton of an apartment house, wherein an opening of a rooftop of the asbestos pipe 1 is opened therein to shut off the atmosphere. And the installed upper compartment 2 and the lower opening 3 of the asbestos tube 1 are opened therein, and the lower compartment 3 is provided which is provided in a state of being cut off from the atmosphere.
A negative pressure dust collector 4 is installed and operated in the lower compartment 3, and the upper compartment 2 and the lower compartment 3 are separated from the atmosphere via the asbestos pipe 1 and are cut off.
An asbestos tube 1 opened in the upper compartment 2 after forming a working space in which the inside is maintained at a negative pressure from the atmospheric pressure.
Tip tool 7 connected to compressed air hose 5 from above
Is driven and rotated while being inserted and moved up and down by a winch 6, thereby hitting, crushing and removing the asbestos pipe 1 to remove and remove the buried asbestos pipe. 2. The tool according to claim 1, wherein the tool is a motor.
a, a universal joint 7b, a tool body 7c, and a tool 7d. By supplying compressed air to the motor 7a, the universal joint 7b rotates with a rotation axis substantially coinciding with the central axis of the asbestos pipe 1, and power is transferred to the universal joint 7b.
The tool 7d is transmitted to the tool 7d via the tool body 7c. The tool 7d has a spindle shape and has ridges and grooves on its surface parallel to its central axis. Tool body 7 with attached
The swing center axis of the swing part provided in c is the tool 7
By swinging with a downward elevation angle in parallel with the rotation axis of c or within 20 degrees, the swinging part protrudes outside,
As a result, the tool 7d attached to the swinging part is
Since the outer radius of rotation is equal to or slightly larger than the outer diameter of the asbestos tube 1, it collides with the inner wall of the asbestos tube 1, and the reaction causes the tool 7d to rotate around its central axis. A device for removing and removing a buried asbestos pipe, wherein the asbestos pipe 1 is rotated at a high speed while moving in a satellite to crush and remove the asbestos pipe 1. 3. The negative pressure dust collector 4 according to claim 1 has a hepa filter equivalent to that used for ordinary asbestos treatment work, but the air treatment amount is equal to the number of compressed air capacity used. Removal of a buried asbestos pipe characterized by maintaining the same system constituted by the lower compartment 3 through the upper compartment 2 and the asbestos pipe 1 at a pressure lower than the atmospheric pressure by having about twice to ten times the air treatment capacity.・ Removal device