JPH01121799A - Method for stripping surface of concrete structure - Google Patents

Abstract

PURPOSE:To obviate leakage of dust to the outside and to effectively recover the dust so as to prevent pollution by stripping the surface of a concrete structure with a chipping machine and vacuum-sucking the stripped dust by means of a hood covering the periphery of the chipping machine. CONSTITUTION:An operator brings a dust collecting cover 6 into pressurized contact with the surface of a wall W by gripping a stripping device A and a operates the chipping machine 5 to strip the surface of the wall W to a prescribed thickness. Then, the dust generated by the stripping, e.g., pollutants are guided through the dust collecting cover 6 and a dust collecting hose H1 into a dust collector B. A negative pressure is generated by the suction pressure of a blower device C and the dust is directly guided into the dust collector or the dust caught between the meshes of a brush is sucked by the air pressure admitted between the meshes at a high speed into the dust collecting cover 6. The brush scraps and sucks the dust sticking to the wall surface after chipping when the dust collector A moves. The inflow air pressure blows off the dust sticking to the wall surface, thus improving the dust collecting effect.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for peeling the surface of a concrete structure.

[Prior art] For example, when dismantling a nuclear power plant, people enter walls, floors, and ceiling surfaces that are not highly contaminated and remove the contaminated surfaces by a predetermined thickness (for example, 3111). .

[Problems to be solved by the invention] However, the above-mentioned method is not efficient because the chipping work is done manually, and the contaminants are spread and there are adult birds in the vicinity of the worker, making it difficult to recover the contaminants. was not efficient.

[Object of the Invention] Accordingly, an object of the present invention is to provide a concrete structure that prevents the diffusion of pollutants and reduces ink stains on workers and the surrounding area, and effectively recovers pollutants when dismantling a nuclear power plant, for example. To provide a method for peeling objects.

[Means for achieving the object] According to the present invention, the surface of a concrete structure is peeled off with a chisel, the peeled dust is vacuum-suctioned by a hood covering the periphery of the chisel, and the suctioned dust is is introduced into a dust collector, and when a predetermined amount of dust accumulates in the dust collector, the dust is collected in a collection bag, and the exhaust from the dust collector is guided to a filter device via a blower device and discharged. A method for peeling a surface of a concrete structure is provided.

[Operations and Effects of the Invention] Therefore, for example, when dismantling a nuclear power plant, separated dust is collected by being guided to a dust collector through a hood that covers the periphery of a lifting machine, and the exhaust air from the dust collector is passed through a filter device. By exhausting the air and performing this series of operations in a closed environment, the spread of contaminants can be minimized and the number of adult birds in the vicinity can be reduced.

Further, the pollutants accumulated in the dust collector can be collected into the collection bag, thereby effectively collecting the pollutants.

This method can achieve stripping, collection, collection, and exhaust in a very clean working environment, so it is suitable for dismantling nuclear power plants, stripping asbestos walls, clean rooms, and renovating inside buildings. be able to.

[Preferred Embodiment] When carrying out the present invention, it is preferable to isolate the working area of the chipping machine, the dust collection device, the blower device, and the vicinity of the inlet of the filter device from the outside with an isolation membrane such as a polyethylene material.
In this way, a clean house is defined by the isolation membrane, and it is possible to prevent contaminants leaked from the cover of the hoisting machine, the dust collector, and the blower from dispersing to the outside.

When carrying out the present invention, it is preferable to suspend the chipping machine via a balancer. In this way, the weight of the peeling device can be reduced and the peeling work can be facilitated.

When carrying out the present invention, it is preferable that the chipping machine be supported through a support member so that it can move up and down and move horizontally, and that it can be controlled remotely. In this way, the peeling work is automated, the peeling efficiency is improved, and the work It is possible to eliminate the construction of people.

[Example] The present invention will be described in detail below with reference to the drawings.

The figure shows a device for carrying out the present invention, and this device includes a stripping device A, a dust collection bag WIB, a blower device C, a filter device, a dust collection hose H1 connecting these, and exhaust hoses H2 and H3. The outlet of the filter device WD is connected to the existing duct shown in the figure.

The stripping device A is suspended from the ceiling T via the balancer 1, the dust collection bag HB, the proa device C, and the filter mounting are installed on the floor, and the entrance of the filter mounting WID is connected to the ceiling.
A clean house R is defined by being isolated from the outside by an isolation membrane S made of polyethylene or the like stretched between the clean house R and the clean house R.

The peeling device A includes a wall guide 4 equipped with a guide roller 3 that is suspended from a wire 2 and comes into contact with the wall, a known arbitrary chipping machine 5 fixed horizontally to the wall guide 4, and a chipping machine 5.
The bottom opening of the dust collecting cover 6 is connected to the dust collecting hose H1, and a brush is provided at the periphery of the opening on the wall side to face the wall. .

The dust collection bag 2B is connected to the am hose H1, has a dust collection filter 11 fixed therein, and is connected to a collector unit 10 having a dust removal handle 12 on the top, and the bottom of the collector unit 10. The upper part is the recovery opening/closing valve 14, and the pressure J! ] A cyclone-shaped dust collection tank 13 connected by a communication pipe 16 via a regulating valve 15;
It consists of a collection bag 17 made of polyethylene material attached to the bottom of the dust collection tank 13. In addition, 18 in the figure is a telescopic leg for height adjustment.

For example, the blower device C has a vacuum pressure of 2050 nm water column,
A fan blower with a flow rate of 5-2 TIt/min is used, its suction port is connected to an exhaust hose H2, and its discharge port is connected to an exhaust hose H3.

The filter device includes a bag filter 30 connected to the exhaust hose H3, and a case 31 connected to the bag filter 30.
Prefilter 32 and Hepafilter 3 provided inside
3 and a fan unit 35 connected to the case 31 via a duct 34, and the vacuum filter 30, pre-filter 32, and hepa filter 33 are configured to capture fine dust in sequence.

Next, during the 0 work to explain the implementation mode using the dismantling of a nuclear power plant as an example, the inside of the clean house R is made negative pressure from the outside, and the blower equipment 2 (and the fan unit 35 are operated).

Gripping the peeling device A, press the dust collection cover 6 against the surface of the wall W, and operate the chipper 5 to cut the surface of the wall W to a predetermined thickness (31 mm).
111). Then, dust or contaminants generated by the peeling are guided to the dust collection bag WIB via the dust collection cover 6 and the dust collection hose H1. At this time, dust collection cover 6
The inside is equipped with a blower f! The suction pressure of the IC creates a negative pressure, and the dust is sucked directly into the dust collection cover 6, or the dust caught between the eyes of the brush is sucked into the dust collecting cover 6 by the wind pressure flowing at high speed between the eyes of the brush. In addition, when the dust collector A moves on the wall surface, the brush scrapes off and sucks the dust that has adhered to the wall surface after chipping, and the inflow wind pressure blows away the dust that has adhered to the bit of the chisel 5, and furthermore, the dust collector cover 6 It improves the dust collection effect by forming a flow of dust inside.

The dust led to the dust collector B is accumulated at the bottom of the dust collection tank 13 by the cyclone effect, and the exhaust is passed through the tA dust filter 1.
1 to the exhaust hose H2. Since the Sa filter 11 captures dust of 1 micron or more in the exhaust gas, all the dust of 1 micron or more is accumulated in the dust collection tank 13, and the particulate dust discharged to the exhaust hose H2 is collected with a size of 1 micron or less. Become.

This dust of 1 micron or less passes through the blower device C, is guided to the filter device fiD, and is collected in order from the larger dust by the bag filter 30, pre-filter 32, and hepa filter 33, and from the fan unit 35, the amount of generated dust is 0. Dust of about 0.3 microns at less than .03% is present in duct 3.
6 to the existing duct.

During these series of peeling 8 and dust collection, the dust leaking from the dust collection cover 6, the dust collection bag fiB, the blower device, and the hoses H1 to H3 does not flow out from inside the clean house R, which is under negative pressure. The dust is guided from the back filter 30 to the filter device gD, where it is collected. Since all of this is done in a closed environment, the spread of dust or contaminants is prevented, and the number of workers and adult birds in the vicinity is reduced.

When the stripping work is completed or a predetermined amount of dust has accumulated in the a-dust tank 13, the dust is collected. That is, the dust attached to the dust filter 11 is shaken off by turning the dust removal handle 12, and the dust is removed from the dust collection tank. When the floating dust in 13 settles, open the collection on-off valve 14 and pressure adjustment valve 15 to connect the collection bag 17 side and the upper part of the dust collection tank through the communication pipe 16 to equalize the pressure between them and remove only the dust. are collected into a collection bag 17. Therefore, it is possible to effectively collect dust without leaking to the outside, and to prevent contamination of the operator's hands and the surrounding area.

[Summary] As explained above, according to the present invention, when dismantling a nuclear power plant, for example, stripping, dust collection, and recovery are performed in a sealed state to minimize the spread of contaminants and to protect workers and surrounding adult birds. It is possible to reduce the amount of pollution and to effectively recover pollutants.

[Brief explanation of the drawing]

The figure is an overall configuration diagram showing an apparatus for implementing the present invention. A...Peeling device B...Dust collector C...Blower device D...Filter device H1...Dust collection hose H2, H3...Exhaust hose W...Wall
5... Chipping machine 6... Dust collection cover 11... t
Am filter 13... Dust collection tank 17... Collection bag 30... Bag filter 32... Pre-filter 33... Heba filter

Claims (1)

[Claims] The surface of the concrete structure is peeled off using a chisel, the peeled dust is vacuum-suctioned using a hood that covers the area around the chisel, the sucked dust is introduced into a dust collector, and the dust is stored inside the dust collector. A method for stripping the surface of a concrete structure, characterized in that when a certain amount of dust has accumulated, the dust is collected in a collection bag, and the exhaust from the dust collector is guided to a filter device through a blower device and discharged.