JP5901259B2 - Concrete hanging dust collector - Google Patents

Description

  The present invention relates to a dust collecting apparatus for use in picking up concrete.

  2. Description of the Related Art Conventionally, in a construction site such as a concrete wall or concrete floor repair work, a concrete hanging machine is used for the work of hanging a concrete surface. As general concrete suspension machines, breakers, water jets, scramblers, hammer type suspension machines and the like are known.

  By the way, in the biological shield concrete floor dismantling construction and the biological shielding concrete wall dismantling construction of a nuclear power plant as shown in Patent Document 1, the concrete surface activated by radiation is separated from the non-activated interior. In order to dispose of it, it is necessary to remove the activated concrete surface by lifting.

  In this case, as shown in FIGS. 17 and 18, the concrete wall 2 and the concrete floor 4 around the reactor main body A of the nuclear power plant building 1 are cut into large blocks, and the large cross section is continuously suspended. Do work. In carrying out the suspending work, a barrier for preventing dust scattering is set in advance in the work area so that the suspended concrete and suspended concrete do not scatter suspended dust. In addition, depending on the work site in the reactor, there are many places where it is difficult to collect wastewater containing activated dust, so it is necessary to consider the conditions in which water cannot be used for suspension work and dust collection.

  In view of the working conditions and environment as described above, it is difficult to use a breaker that is difficult to continuously hang a large cross-section or a water jet that uses a large amount of water in the concrete at a nuclear power plant. . For this reason, as a suspension machine used for such a suspension work, among the scrambler and hammer type suspension machines that can continuously suspend concrete surfaces, the hammer type suspension machine that can be attached to a heavy machine can be used. Such a hanging machine is preferably used.

  A hammer-type suspension machine is a suspension machine that is driven by using compressed air supplied from an air compressor. This hammer type suspension machine is designed so that compressed air always enters the air piston at the base of a chisel rod (hammer) with a cutting bit at the tip. The concrete is picked up again by jumping out by the air piston and repeatedly hitting the concrete.

  This type of hammer is required to improve the efficiency of collecting and collecting radioactive dust that floats in the barrier when hanging concrete with a large section using a lifting machine such as a lifting machine. It is necessary to keep the activated dust that is difficult to collect by sticking to the surface of the barrier as much as possible.

JP 2003-14891 A

  The present invention has been made in view of the above, and provides a suspended dust collecting device capable of improving the dust collection efficiency of dust when performing continuous lifting work on concrete having a large cross section. For the purpose.

To solve the above problems, in order to achieve the objects, concrete according to the onset Ming hanging precipitator, concrete for Hatsuru a concrete a suspension precipitator, is configured to be attached to the heavy equipment, concrete A hammer for holding the surface, a dust collection cover arranged to surround the hammer, collecting dust from the suspended dust, and connected to the dust collecting cover, and collecting dust collected for collecting the suspended suspended dust A dust collecting cover is attached to the tip of the dust collecting cover, and the dust collecting cover is configured by combining a plurality of members divided in the circumferential direction of the hammer, and the plurality of members An end surface member and an arcuate member extending along the inner peripheral surface of the cylinder connected to the end surface member are provided at the end of the base side of the base. And abutment to said Rukoto the outer periphery of the hammer base.

Another concrete according to the present onset Ming hanging precipitator, characterized in that in the invention described above, occurs when the Hatsuru concrete wall having a collecting hopper means for collecting the hanging piece below the hammer And

Another concrete according to the present onset Ming hanging dust collector is, in the invention described above, occurs when the Hatsuru concrete floor is provided with a sub dust collecting means for collecting the fishing dust on the side of the hammer It is characterized by that.

  According to the present invention, the concrete for suspending concrete is a suspended dust collecting device, and is configured to be attachable to a heavy machine, arranged to surround the hammer and a hammer for suspending the concrete surface, A dust collecting cover for collecting the suspended dust and a dust collecting means connected to the dust collecting cover and collecting the suspended suspended dust are provided. Therefore, the concrete generated by hammering the suspended dust around the periphery. Dust is collected in the surrounding dust collecting cover and immediately sucked and collected by the dust collecting means. For this reason, when performing the continuous suspending operation | work with respect to concrete of a large cross section, there exists an effect that the dust collection recovery efficiency of dust can be improved.

FIG. 1 is a block diagram showing an embodiment of a dust collecting device for concrete according to the present invention. FIG. 2 is a side view showing an example of a hammer type lifting machine used in the present invention. FIG. 3 is a front view showing an example of a hammer type lifting machine used in the present invention. FIG. 4 is a front view of the dust collecting cover. FIG. 5 is a side view of the dust collecting cover. FIG. 6 is a rear view of the dust collecting cover. FIG. 7 is a front view of the brush. FIG. 8 is a side view of the brush. FIG. 9 is a side view when a flange is provided. FIG. 10 is a side view when a flange and a brush are provided. FIG. 11: is a side view which shows the state of suspension of the concrete wall surface by the concrete suspension dust collector which concerns on this invention. FIG. 12 is a side view showing the state of the concrete wall suspended by the suspended dust collecting device according to the present invention, and is a view in the case of having a recovery hopper means. FIG. 13: is a side view which shows the state of the concrete floor surface suspended by the concrete dust collector which concerns on this invention. FIG. 14 is a top view of the concrete floor surface of FIG. FIG. 15: is a side view which shows the state of the concrete floor surface suspended by the concrete dust collector, and is a figure in the case of having a sub dust collection means. 16 is a top view of the concrete floor surface of FIG. FIG. 17 is a side sectional view showing the position of the biological shield concrete wall in the nuclear power plant building. FIG. 18 is a side sectional view showing the position of the bioshield concrete floor in the nuclear power plant building.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a concrete dust collecting apparatus according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. Here, the concrete dust collecting apparatus according to the present invention is a sealed work in a nuclear power plant where a dust collecting function for suspended dust is required rather than a general repair work site such as a pier or a dam performed under open-air conditions. It is particularly effective for on-site application.

  As shown in FIG. 1, the concrete dust collecting device 10 according to the present invention is a concrete dust collecting device for holding concrete 2 and is configured to be attachable to an arm of a heavy machine (not shown) such as an excavator, A hammer-type suspension machine body 14 having a hammer 12 for gripping the surface of the concrete 2 and a concrete that is disposed so as to surround the hammer 12 and that is generated by repeated hammering of the hammer 12 is used to collect the suspended dust. The cover 16 is connected to the dust collecting cover 16 and includes a bag filter dust collector 24 (dust collecting means) that collects sucked suspended dust.

  Between the dust collecting cover 16 and the bag filter dust collector 24, there is provided a trap 20 comprising a can-like container for trapping the collected dust. The trap 20 includes a hose 18 connected to the dust collecting cover 16 and A hose 22 connected to the bag filter dust collector 24 is connected. An air suction blower 28 is connected to the downstream side of the bag filter dust collector 24 via a hose 26. In addition, the length of these hoses should just use the thing suitable for the machine installation condition in a barrier (work space), and a hose diameter can use a thing about (phi) 50 mm, for example. Further, the blower 28 includes an inverter facility for air volume operation.

  The bag filter dust collector 24 (dust collecting means) is a cyclone type consisting of a centrifugal separator 24a and a dust collector 24b. Air sucked from the dust cover 16 through the hoses 18 and 22 is collected in the centrifugal separator 24a. The suspended dust contained in the air is separated by centrifugal force generated at the time of turning, and collected in the dust collecting unit 24b. In the present invention, a non-cyclonic bag filter dust collector can be used as the dust collecting means.

  2 and 3 are diagrams of a hammer type lifting machine used in this embodiment. As shown in FIGS. 2 and 3, the hammer type has a cutting bit 12a at the tip of the hammer 12 of the suspension machine body 14, and the base 12b of the hammer 12 can be fitted with a dust collecting cover 16 on the outer periphery. It has a cylindrical shape. The hammer type lifting machine is not limited to this, and a structure other than the structure shown in FIGS. 2 and 3 can also be used.

  This hammer type suspension machine main body 14 is driven by compressed air supplied from an air compressor (not shown), and the hammer 12 quickly moves forward and backward by an air piston (not shown) to hit concrete and suspend its surface. It is configured to be possible.

  4-6 is a figure of the dust collection cover used for a present Example. As shown in FIGS. 4 to 6, the dust collecting cover 16 is composed of a semi-annular upper member 16 a and a lower member 16 b in which a cylindrical member is divided into upper and lower parts, and flanges provided at each edge Are joined by bolts 16c. As described above, the dust collection cover 16 is configured such that a plurality of members divided in the circumferential direction of the hammer are joined by the combination bolt, so that the adjustment of the attachment position of the dust collection cover 16 with respect to the hammer is facilitated.

  End portions on the base side of the upper member 16a and the lower member 16b are provided with end surface members 17c and 17d and arc-shaped members 17a and 17b that are connected to the end members and slightly extend along the inner peripheral surface of the cylinder. At the time of mounting, the inner sides of the arc-shaped members 17a and 17b come into contact with the outer periphery of the hammer base 12b (see FIG. 2). A flow guide pipe 16d and a connection end 16e for guiding the dust trapped inside the cylinder to the outside communicate with the lower part on the base side of the lower member 16b.

  Further, as shown in FIG. 1, an attachment consisting of a brush 30 is attached to the tip of the dust collecting cover 16. As shown in FIGS. 7 and 8, the brush 30 is provided on an annular base member 30b. A mounting claw 30a for mounting on the dust collecting cover is provided behind the base member 30b. The brush 30 can be made of a material such as nylon, polypropylene, or vinyl chloride, but may be made of any other material.

  In addition, as an attachment with which the tip of the dust collecting cover is attached, instead of the brush 30 as shown in FIG. 9, an attachment comprising a flange 32 may be attached, or as shown in FIG. In addition, a flange 32 may be attached.

The operation and action of the above configuration will be described.
As shown in FIG. 1, a hammer-type suspension machine body 14 is moved by an arm of a heavy machine such as an excavator, and the surface of the concrete wall 2 having a large cross section is suspended while moving the hammer 12 along the surface of the concrete wall 2. The suspended dust generated during the hanging operation is locally collected by the dust collecting cover 16 surrounding the hammer 12 and immediately sucked and collected by the bag filter dust collector 24 via the hose 18 and the like, and is collected in the working space. Will not scatter. Thus, according to the present invention, the dust collection efficiency of dust can be improved when performing continuous suspension work on concrete having a large cross section.

  In particular, the present invention provides continuous suspension work for large sections in a sealed barrier (work space) in dismantling work or renovation work where water for preventing dust scattering cannot be used without splashing dust. Is possible.

  For example, in the dismantling work of a nuclear power plant dismantling work, there is a problem of countermeasures against the scattering of the dust activated in the barrier. According to the present invention, the dust collection of the activated dust floating in the partitioned barrier is performed. Recovery efficiency can be improved, and activated dust that is difficult to recover by sticking to a curing facility in the barrier can be made difficult to stay in the barrier. Since dust does not scatter in the barrier, it is possible to reduce the time required for the suspension work and to reduce the time required for dust treatment. For this reason, the danger of the worker's exposure at the time of barrier replacement, etc. can be reduced.

  Moreover, according to this invention, it is possible to attach various attachments, such as a brush, a flange, a brush, and a flange, to the front-end | tip of a dust collecting cover. In addition, according to the experiment, the ratio of the measured drop and the collection of the suspended piece to the suspended piece / dust was about 99% on the wall surface and about 96% on the floor surface in the case of the brush. In the case of the flange, the ratio was about 52% on the wall surface, and in the case of the brush and the flange, the ratio was about 98% on the wall surface.

  In particular, if the attachment at the tip of the dust collecting cover is a brush, the falling pieces will have fewer suspended pieces. The reason for this is that when the wall or floor suspension work proceeds, the suspension groove becomes deeper, a step is formed between the wall surface or the floor surface, and the suspension piece falls from there, but a brush attachment is attached. Therefore, the brush follows the step between the wall surface or the floor surface and the apparent step is eliminated, and the suspended piece is less likely to fall.

  On the concrete wall, if a brush attachment is attached to the tip of the dust collection cover, approximately 98-99% of the suspended pieces and dust can be collected, but the remaining 1-2% of the hammer is moved along the concrete surface during the suspension work. When the brush moves, the brush falls from the suspension surface by stroking the suspension surface. FIG. 11 shows the state of the concrete wall hanging.

  As a method of collecting the suspended pieces, there is a method of collecting the suspended pieces with a vacuum cleaner after the suspension work. For example, as shown in FIG. It is also possible to achieve a recovery rate close to 100% as long as it is a method that is installed in the lower side and is recovered via the hose 36.

  On the other hand, on the concrete floor surface, when an attachment made of a brush is attached to the dust collecting cover, about 96% of the suspended pieces and dust can be collected, and the remaining 4% becomes suspended pieces that could not be collected by the dust collector. FIG. 13 and FIG. 14 show how the concrete floor is suspended. In FIG. 14, reference numeral 38 indicates an area where the hammer 12 and the brush 30 face each other and perform a lifting operation.

  Therefore, in order to improve the dust collection efficiency, as shown in FIGS. 15 and 16, sub dust suction ports 40a and 40b (sub dust collection means) are installed in the moving direction of the hammer 12 (side of the hammer 12). However, if suction / recovery is performed via the hoses 42a and 42b, it is possible to expect further recovery of the suspended pieces / dust. In FIG. 16, reference numeral 38 indicates a region where the hammer 12 and the brush 30 face each other and performs a lifting operation, and reference numeral 44 indicates a region where the sub dust suction ports 40 a and 40 b face each other.

  In the above embodiment, the case where the hammer type suspension machine is used as the hammer for suspending the concrete surface has been described. However, the present invention is not limited to this, and any hammer type suspension machine capable of suspending the concrete surface may be used. The hammer type may use a hanger machine other than the hanger machine.

  As described above, according to the present invention, the concrete for holding concrete is a suspended dust collecting device, which is configured to be attachable to a heavy machine, and has a hammer for holding the concrete surface, and the periphery of the hammer. It is disposed so as to surround, and includes a dust collecting cover for collecting suspended dust and a dust collecting means connected to the dust collecting cover for collecting the suspended suspended dust, so that the concrete generated by hammering is suspended. The dust is collected in a dust collection cover surrounding the dust, and immediately sucked and collected by the dust collecting means. For this reason, when performing the continuous suspending operation | work with respect to concrete of a large cross section, the dust collection recovery efficiency of dust can be improved.

  As described above, the concrete dust collector according to the present invention is useful for performing continuous suspension work on concrete having a large cross section, and in particular, suspension work for activated concrete in a nuclear power plant building. Suitable for

2 Concrete wall (concrete)
4 Concrete floor 10 Concrete suspended dust collector 12 Hammer 14 Hammer-type suspended machine body 16 Dust collecting cover 18, 22, 26, 36, 42a, 42b Hose 20 Trap 24 Bag filter dust collector (dust collecting means)
28 Blower 30 Brush 32 Flange 34 Recovery hopper means 40a, 40b Sub dust inlet (sub dust recovery means)

Claims (3)

Concrete for suspending concrete is a suspended dust collector,
A hammer configured to attach to a heavy machine, and to hold a concrete surface;
A dust collection cover arranged to surround the hammer and for collecting suspended dust;
It is connected to the dust collecting cover, and comprises dust collecting means for collecting the sucked suspended dust ,
Attach an attachment consisting of a brush and flange to the tip of the dust cover,
The dust cover is configured by combining a plurality of members divided in the circumferential direction of the hammer,
An end face member and an arcuate member extending along the inner peripheral surface of the cylinder connected to the end face member are provided at the base end side of the plurality of members, and the inside of the arcuate member has a columnar shape. concrete chipping dust collecting apparatus for a contact to said Rukoto the outer periphery of the base. 2. The concrete suspension dust collecting apparatus according to claim 1, wherein a recovery hopper means for recovering suspension pieces generated when hanging on the concrete wall surface is provided below the hammer. The concrete dust collecting apparatus according to claim 1 or 2 , wherein sub dust collecting means for collecting suspended dust generated when the concrete floor surface is hung is provided on a side of the hammer.

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