JP5854352B2 - Concrete dust removal equipment - Google Patents

Description

  The present invention relates to a concrete dust removing device that prevents and removes dust scattered when cutting, grinding, or polishing concrete with a hand cutter, an air cutter, or the like.

  In recent years, a lot of work for cutting or grinding / polishing concrete with a hand cutter or an air cutter, in particular, an anode installation groove work in an anticorrosion method has been performed. In this type of concrete cutting, grinding and polishing operations, a large amount of dust is generated, and there is a concern that the health of workers and third parties may be hindered and the surrounding environment may be adversely affected.

  On the other hand, the main object of the cathodic protection work is the structure under severe air salinity environment, and the construction to the third party by the generation of the dust has little effect on the third party, and the awareness of the problem with the dust is low. However, in recent years, there are increasing cases of salt damage to existing structures due to the salt content of concrete and the intrusion of anti-freezing agents into defective parts of the grout. Therefore, it is important to take measures against dust during concrete cutting, grinding and polishing.

  As a measure against past dust, there are methods such as adding a mist injection function near the cutter blade or preventing it from scattering by wet cutting. It prevents dust from being scattered and causes water containing dust to flow down, so it cannot be used in places where the generation of contaminated water is restricted, such as on rivers or roads. Is not a general dust countermeasure.

  In addition, there is a method of attaching a dust cover to the cutter and collecting the dust with a vacuum cleaner or blower. However, if the amount of generated dust is large, the filter of the dust collector is clogged early, and the good dust collection effect is maintained. As a result, the work environment deteriorates and the work efficiency decreases.

  In order to solve the above-mentioned problems of dust countermeasures, a method of removing dust by a combination of a dust collector provided with a water tank and a filter-type dust suction device (for example, Patent Documents 1 and 2), or a collection provided with a water tank. There exists what integrated the dust suction device which provided the dust device and the filter (for example, patent document 3).

No. 5-6061 Japanese Utility Model Publication No. 3-23298 JP-A-8-323625

  In the method of removing dust by the combination of the dust collector provided with the water tank and the filter-type dust suction apparatus shown in Patent Documents 1 and 2 described above, it is difficult to completely precipitate fine particles in the water tank, Dust that could not be captured in the water tank is adsorbed by the filter of the dust suction device. As a result, there is a problem that the suction capability of the suction machine is reduced and the cleaning maintenance labor is increased.

  Further, as shown in Patent Document 3, in an apparatus in which a dust collecting device provided with a water tank and a dust collecting device provided with a filter are integrated, a dust generating source capable of using this type of dust removing device and However, there is a problem that it cannot be used when a large amount of dust is generated, such as concrete cutting, grinding, and polishing used in an anticorrosion work, and a high suction capability is required.

  In addition, since the price per dust removing device is high, there is a problem that a large number of dust collectors are required in the type of work such as an electric corrosion protection method with a large quantity of cutting concrete, resulting in an increase in dust collection cost.

  In view of such conventional problems, the present invention reliably collects a large amount of dust generated during concrete cutting or grinding / polishing, such as an anti-corrosion method, and has a good working environment / periphery without reducing work efficiency. It was made for the purpose of providing a concrete dust removing device that can ensure the environment.

The concrete dust removing device according to claim 1 is characterized in that: a sealed container having a liquid storage part containing a dust removing liquid in an inner bottom part thereof, floated on a liquid surface of the liquid storage part of the sealed container, A float having a size having an air gap between the inner peripheral surface, and a net member installed in an arrangement to cover an upper portion of the air gap between the periphery of the float and the inner peripheral surface of the sealed container; A dust air injection path that communicates from outside the sealed container to the bottom of the float, and a dust removal air discharge path that discharges air inside the top of the sealed container, and the dust air injection path has the tip thereof It has a dust removal liquid insertion part that protrudes downward from the bottom of the float, passes through the sealed container from the dust air injection path or dust removal air discharge path, and is discharged from the dust removal air discharge path. Forcing air to the side A dust removing liquid containing a foaming agent is contained in the liquid storage part, and the dust-containing air injected from the dust air injection path is foamed by passing through the mesh material from the dust removing liquid. It is in that.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the dust air injection path includes a flexible portion that expands and contracts or curves following the vertical movement of the float in the sealed container. There is to be.

  As described above, the present invention accommodates the dust removal liquid with the foaming agent added to the liquid storage part, and the dust-containing air injected from the dust air injection passage is foamed by passing through the mesh material from the dust removal liquid. By doing so, fine bubbles are generated on the upper side of the float due to the vibration of the float, the jet stirring of the air to the dust removal liquid containing the foaming agent, and the formation of the liquid film by the wire mesh, and this causes small bubbles in the concrete dust Particles are adsorbed and a high dust removal effect is obtained.

  In addition, by configuring the concrete dust removing device, any suction machine having suction capability necessary for dust suction in the electrocorrosion protection method can be used as the air feeding means, and the structure in the sealed container and the communication with this It is a structure that allows anyone to create the entire structure of members and the like easily and at low cost.

  In addition, the removed dust can be easily washed with water, has excellent maintainability, and the dust removal liquid surface and float can be moved to the top of the container. There is no need to clean or replace the inside of the container until all of the above is collected, there is no reduction in work efficiency, and a large amount of dust can be processed at low cost.

It is explanatory drawing which shows the outline of one Example of the concrete dust removal apparatus which concerns on this invention. It is a longitudinal cross-sectional view of the airtight container part in FIG. It is the sectional view on the AA line in FIG. It is sectional drawing of the waist | lumbar part of the other Example of the concrete dust removal apparatus which concerns on this invention.

  Next, embodiments of the present invention will be described based on the embodiments shown in the drawings. FIG. 1 shows an outline of a concrete dust removing apparatus according to the present invention. In the figure, reference numeral 1 denotes a sealed container for dust removal. The sealed container 1 is open at the top, and a lid 2 for sealing the lid is detachably attached to the opening.

  The sealed container 1 has a bottomed cylindrical shape, the inner bottom part is a liquid storage part 3, and a dust removal liquid 4 made of an aqueous solution is stored at a desired depth. The dust removing liquid 4 is a mixture of a foaming agent in water, and any foaming agent may be used as long as it can form bubbles by blowing dust-containing air, which will be described later, in addition to a detergent.

  A plate-like float 5 floated on the dust removing liquid 4 stored in the sealed container 1 is accommodated in the sealed container 1. The float 5 has a plate shape having a gap 6 for ventilation between the entire circumference and the inner peripheral surface of the sealed container 1, and the surface of the dust removing liquid 4 remains on the gap 6 portion. In the state where it floats on the upper surface of the dust removal liquid 4, it can move up and down following the movement of the liquid surface. For example, a porous synthetic resin foam can be used as the material.

  On the upper surface of the float 5, a net material 7 made of a metal net is overlapped and fixed. The net member 7 is stretched around the outer periphery of the float 5, covers the upper portion of the gap 6 described above, and can move up and down along the inner peripheral surface of the sealed container 1 as the float 5 moves up and down. Is formed.

  The airtight container 1 communicates with a dust air injection path 10 that communicates from the outside of the airtight container to the bottom of the float 5 and a dust removal air exhaust path 11 that exhausts air inside the airtight container 1 from the upper part.

  The dust air injection path 10 has an injection cylinder 12 that is vertically fixed to the float 5 and fixed to the center of the float 5, and an L-shaped hose intermediate connection cylinder that is vertically fixed and fixed to the lid 2. 13. The injection cylinder 12 is a dust removal liquid insertion portion 12a whose lower end protrudes below the float 5, and the upper end side on the float 5 is a hose connection portion.

  The hose intermediate coupling cylinder 13 is fixed so that the L-shaped vertical portion 13 a passes through the lid 2 and the L-shaped horizontal portion 13 b is oriented sideways along the inner surface of the lid 2.

  A dust air injection hose 14 is connected to the upper end of the vertical portion 13 a of the hose intermediate connection cylinder 13, and a flexible in-container hose 15 is connected between the horizontal portion 13 b and the float upper protrusion of the injection cylinder 12. The dust air injection path 10 is configured.

  The upper side of the in-container hose 15 is oriented in the extending direction of the horizontal portion 13b of the hose intermediate connecting cylinder 13, that is, in the horizontal direction, and in the extending direction of the lower injection cylinder 12, that is, in the vertical direction. It becomes the flexible part 15a. For this reason, the vertical movement of the float 5 is not restrained by the bending and stretching operation following the vertical movement of the float 5.

  For example, as shown in FIG. 1, the tip of the dust / air injection hose 14 communicates with a dust collection cover 21 that covers the dust generation part by the air cutter 20, and sucks the generated concrete dust together with the surrounding air.

  The dust removal air discharge path 11 is composed of a hose connection cylinder 16 that is vertically penetrated through the lid 2 and a dust removal air discharge hose 17 connected thereto. The dust removal air discharge hose 17 communicates with the air supply means 18 to send air. By reducing the pressure in the sealed container 1 through the dust removing air discharge hose 17 with the air means 18, the dust-containing air is sucked under the float 5 of the sealed container 1 from the dust air injection path 10.

  When the air supply means 18 is provided on the side of the dust removal air discharge path 11 as described above, a dust removal filter such as an air suction type vacuum cleaner or a dust suction machine used for grinding concrete in the anticorrosion method is incorporated. Can be used.

  In addition, although the flexible part 15a mentioned above is comprised by curving the container hose 15, you may make it comprise by using the expansion-contraction hose which expands / contracts the container hose 15 to an axial direction. .

  Further, although the air supply means 18 is provided on the dust removal air discharge hose 17 side, the air supply means 18 may be provided in the middle of the dust air injection hose 14 of the dust air injection hose path 10. In this case, a high-power fan that does not use a filter for dust removal is used.

  Further, as shown in FIG. 4, a plurality of the same structures as those in the above-described sealed container 1 are used, and the dust removal air discharge hose 17 communicated with one sealed container 1A is replaced with a dust air injection hose of another sealed container 1B. 14 may be sequentially passed through the plurality of sealed containers 1A and 1B to remove dust in a plurality of stages. In FIG. 4, the same parts as those in FIG.

  The concrete dust removing device configured as described above is included in the concrete dust by injecting the dust air containing the concrete dust into the dust removing liquid 4 below the float 5 from the dust removing liquid inserting portion 12a of the injection cylinder 12. The relatively large particles that have been deposited in the dust removal liquid come into contact with the dust removal liquid and gradually precipitate.

  On the other hand, fine bubbles are generated on the upper side of the float due to the vibration of the float 5, the jet stirring of air to the dust removing liquid containing the foaming agent, and the formation of the liquid film by the net member 7, and thereby small particles in the concrete dust are generated. Adsorbed and high dust removal effect is obtained.

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Lid 3 Liquid storage part 4 Dust removal liquid 5 Float 6 Crevice 7 Net | network material 10 Dust air injection path 11 Dust removal air discharge path 12 Injection cylinder 12a Dust removal liquid insertion part 13 Hose intermediate connection cylinder 13a Vertical part 13b Horizontal part 14 Dust air injection hose 15 Hose in container 15a Flexible portion 16 Hose coupling cylinder 17 Dust removal air discharge hose 18 Air supply means 20 Air cutter 21 Dust collection cover

Claims (2)

An airtight container having a liquid storage part containing dust removal liquid at the inner bottom part;
A float floated on the liquid surface of the liquid storage part of the closed container and having a ventilation gap between the liquid container and the inner peripheral surface of the closed container; and the periphery of the float and the inner peripheral surface of the closed container; A net member installed in an arrangement to cover the upper part of the ventilation gap between the dust container, a dust air injection path communicating from the outside of the sealed container to the bottom of the float, and a dust removing unit for discharging air inside the sealed container from the upper part An air discharge path,
The dust air injection path has a dust removal liquid insertion portion whose tip protrudes downward from the bottom surface of the float,
The dust air injection path or the dust removal air discharge path includes air supply means for forcibly supplying air from the dust air injection path to the side to be discharged from the dust removal air discharge path through the sealed container.
A dust removing liquid to which a foaming agent is added is stored in the liquid storage part, and the dust-containing air injected from the dust air injection path is foamed by passing through the net member from the dust removing liquid. Concrete dust removal device that becomes as   2. The concrete dust removing device according to claim 1, wherein the dust air injection path includes a flexible portion that expands and contracts or curves following the vertical movement of the float in the sealed container.

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