JP2011236579A - Wind pressure scattering and collection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wind pressure scattering and collection device that enables a substance to be collected such as fibrous substances to be gathered on the spot and that allows the scattering conditions on the spot to be understood.SOLUTION: The wind pressure scattering and collection device comprises a body 10 with an opening 12 on one surface that can form a closed space by bringing the edge of the opening 12 in close contact with an object surface 2, an air spray part 20 installed in the body 10 and capable of spraying air onto the object surface 2, and a collection part 30 installed in the body 10 and capable of collecting substances to be collected 3 such as dust, volatile organic compound (VOC) and formaldehyde that float within the body 10.

Description

  The present invention relates to a wind pressure scattering collection device that blows air onto a building or a workpiece and collects dust, volatile organic compounds (VOC), formaldehyde, and the like that are scattered along with the air.

  In recent years, there are concerns about the dusting of fibrous particles, etc. from sprayed asbestos and asbestos-containing building materials, and the health effects of such exposure.

  On the other hand, a containment process has been conventionally performed as one of the processing methods for suppressing scattering of fibrous substances and the like. This containment process is a method of suppressing scattering by covering, fixing, and fixing a sprayed asbestos layer with an asbestos scattering inhibitor or the like (see Patent Document 1).

JP 2009-52363 A

  However, there is a conventional problem that there is no appropriate method for investigating the state of scattering of fibrous materials at the site, and therefore the situation of scattering of fibrous materials at the site cannot be grasped.

  Therefore, an object of the present invention is to provide a wind pressure scattering collection device that collects a substance to be collected such as a fibrous substance on-site and makes it possible to grasp the scattering state on the site.

  In order to achieve the above object, the present inventor has conducted extensive research to make it possible to carry out an air erosion test etc. on the spot, and as a result, it is possible to grasp the scattering situation of the fibrous substance etc. on the spot. Invented the device. That is, a wind pressure scattering collection device according to the present invention is provided in a housing having an opening on one surface and capable of forming a sealed space by bringing an edge of the opening into close contact with a target surface. And an air blowing section capable of blowing air onto the target surface, and a collection section provided in the casing and capable of collecting a substance to be collected floating in the casing.

  As described above, the wind pressure scatter collecting device according to the present invention forms a sealed space in which the casing in which the air blowing unit and the collecting unit are provided has the edge of the opening in close contact with the target surface. By being configured, it is possible to carry out tests such as an air erosion test in the field and collect collected substances such as dust, volatile organic compounds (VOC), and formaldehyde. Further, by analyzing the collected substance to be collected by various measuring methods, it is possible to grasp the scattering situation at the site.

  In the wind pressure scattering collection device according to the present invention, it is preferable that the collection unit is provided at a position farther from the air blowing unit than the opening of the housing.

  Moreover, in the wind pressure scattering collection device according to the present invention, the air blowing unit supplies a porous tube having a plurality of holes formed in an axial direction so as to face the target surface, and supplies air into the porous tube. It is preferable to provide an air supply device. Further, the porous tube may be configured such that the air blowing direction can be changed over time. As described above, by providing a porous tube in which a plurality of holes are formed in the axial direction and the air blowing direction can be changed with time, air can be uniformly blown to the target surface. .

  Furthermore, in the wind pressure scattering collection device according to the present invention, the collection unit is connected to a suction device capable of sucking the air in the housing, and is included in the air sucked by the suction device. It is preferable to be configured to collect the collected material. As described above, the collection part is connected to the suction device, whereby the substance to be collected floating in the housing can be efficiently collected.

  Furthermore, in the wind pressure scattering collection device according to the present invention, the collection unit may include a dust collection member capable of collecting dust or a gas adsorption member capable of adsorbing gas. .

  As described above, according to the present invention, it is possible to provide a wind pressure scattering collection device that collects a substance to be collected such as a fibrous substance on-site and makes it possible to grasp the state of scattering on-site.

It is a partially notched front view which shows the structure of the wind-pressure scattering collection apparatus which concerns on one Embodiment of this invention. It is sectional drawing which shows the use condition of the wind pressure scattering collection apparatus which concerns on this embodiment.

  Next, a wind pressure scattering collection device according to an embodiment of the present invention will be described based on the drawings. As shown in FIG. 1, the wind pressure scattering collection device 1 according to the present embodiment includes a housing 10, an air blowing unit 20 provided in the housing 10, and a collection object floating in the housing 10. And a collection unit 30 capable of collecting the substance 3.

  The casing 10 is a casing having a size that can be transported. The casing 10 is formed in a box shape capable of forming a sealed space, that is, a rectangular parallelepiped shape. Is formed. A seal member 14 made of resin or the like is provided on the entire periphery of the opening 12 of the housing 10, whereby the edge of the opening 12 of the housing 10 is placed on the target surface 2 such as a wall. It can be adhered. Further, leg members 16 that support the casing 10 are provided at the four corners of the bottom surface 10a of the casing 10, and the leg members 16 are provided when the casing 10 is placed on the floor surface. 10 is formed in a prismatic shape having a height capable of forming a predetermined interval between the bottom surface 10a and the floor surface.

  The air blowing unit 20 is configured to pass air into the porous tube 22 through the porous tube 22 provided in the housing 10, a rotating device 24 for rotating the porous tube 22 around its axis, and the hose 26. And an air pump (not shown) to be supplied.

  The porous tube 22 is formed in a cylindrical shape, and four holes 23 are formed at equal intervals in the axial direction at positions facing the target surface on the circumferential surface. The hole 23 is formed in a tapered shape (mortar shape) extending from the inner surface to the outer surface of the porous tube 22 toward the outer surface. The porous tube 22 is provided through one side surface of the housing 10 such that one end 22a is located outside the housing 10 and the other end 22b is located inside the housing 10. It is provided at a position spaced a predetermined distance from the opening 12 of the body 10. Further, the porous tube 22 has one end 22 a connected to the hose 26, whereby the air supplied from the air pump is configured to flow into the porous tube 22 through the hose 26. The perforated tube 22 is connected to a rotating device 24 on the one end 22a side, and is configured to rotate around its axis by the rotating device 24 so that the spraying direction can be changed over time.

  The rotating device 24 is configured to rotate the porous tube 22 around its axis at a preset rotation speed by a driving source such as a motor.

  The collection unit 30 includes a collection member 32, a holder 34 that holds the collection member 32, and a support member 36 to which the holder 34 can be attached.

  When the material to be collected 3 is dust such as a fibrous material, the collecting member 32 can be a dust collecting member composed of a filter or the like that can collect dust. When the collection material 3 is a gaseous substance, a gas adsorbing member made of activated carbon or the like that can adsorb the gaseous substance can be used. Here, in the case of using a dust collecting member, for example, a filter made of cellulose ester (membrane) having an average pore diameter of 0.8 μm and a diameter of 25 mm is 99% or more for particles having a collection efficiency of 0.3 μm in diameter. It is preferable to use a filter. In addition, when using a polycarbonate filter, it is preferable to use a glass having a pore diameter of 0.8 μm deposited with gold or carbon, and use a glass fiber filter or a membrane filter as a backup filter for reinforcement and contamination prevention. .

  The holder 34 is an open face type filter holder having an opening on the upper side, and is configured to hold the collection member 32 inside while being exposed to the opening. The bottom surface of the holder 34 is formed with an outflow hole 34a so that air flowing in from the upper side passes through the collecting member 32 and then flows out from the lower side. When using a filter with a diameter of 25 mm as the collecting member 32, the holder 34 is preferably of a structure according to the size of the filter with a diameter of 25 mm so that the filter can be easily detached and completely sealed. .

  The support member 36 is formed in a cylindrical shape, and at the center position of the bottom surface 10 a of the housing 10, the upper end 36 a is located inside the housing 10 and the lower end 36 b is located outside the housing 10. The bottom surface 10a of the housing 10 is provided through. The upper end 36a of the support member 36 is configured such that the bottom surface of the holder 34 is detachable, and is configured to communicate with the outflow hole 34a of the holder 34 when the holder 34 is mounted. The position of the upper end 36a of the support member 36 is set so as to be a position away from the air blowing unit 20 with respect to the opening 12 of the housing 10 in a state where the holder 34 is mounted. The lower end 36 b of the support member 36 is connected to a suction device (not shown) that can suck the air in the housing 10.

  Next, the collection method of the to-be-collected substance 3 using the wind-pressure scattering collection apparatus 1 which concerns on this embodiment is demonstrated using FIG. Here, although the wind pressure scattering collection apparatus 1 which concerns on this embodiment demonstrates the example which collects dusts, such as a fibrous material, it is not limited to this, For example, volatile organic compounds (VOC), formaldehyde, etc. It can also be used for collection.

  First, the edge of the opening 12 of the housing 10 is brought into close contact with the surface of the target surface 2 to which the substance to be collected 3 is attached. Here, when a gap is formed by the unevenness of the target surface 2 or the like, a replenishing member capable of closing the gap is used, or by replacing with another seal member adapted to the unevenness of the target surface 2. The edge of the opening 12 of the body 10 is securely adhered to the target surface 2. Further, the holder 34 holding the collecting member 32 is attached to one end 36 a of the support member 36. The attachment of the holder 34 may be performed either before or after the housing 10 is brought into close contact with the target surface 2, but when it is performed before the contact, it is necessary to consider contamination of the collecting member 32.

  Next, assuming the airflow state on the surface of the target surface 2, conditions such as the flow rate of air blown from the air blowing unit 20 to the target surface 2 are set, and then the wind pressure scattering collection device 1 is operated. The airflow state on the surface of the target surface 2 is set in consideration of the state assumed at the site, such as air conditioning at the site where the target surface 2 is constructed.

  When the wind pressure scattering collection device 1 is operated, air having a flow rate set on the target surface 2 is blown from the air blowing unit 20. Specifically, first, air is supplied from the air pump into the porous tube 22 through the hose 26, and the air is discharged from the four holes 23 of the porous tube 22. Further, the porous tube 22 is rotated about its axis by driving the rotating device 24, and air is uniformly blown over the entire target surface 2. The axial rotation speed of the porous tube 22 is preferably about one rotation per minute, for example. As a result, the substance to be collected 3 adhering to the target surface 2 is scattered and floats inside the housing 10.

  Next, the suction device connected to the collection unit 30 is operated to suck the air in the housing 10. The suction air amount of this suction device is preferably set to, for example, 1 to 4 L / min, more preferably 4 L / min. Moreover, it is preferable that suction time is set with the fixed lower limit of the range of the amount of suction airs 1-4L / min. As a result, the substance to be collected 3 floating in the housing 10 is sucked into the collection unit 30 and collected by the collection member 32.

  Thereafter, the holder 34 is taken out from the wind pressure scattering collection device 1, the collection member 32 and the substance 3 to be collected are sealed so as not to be contaminated by other substances, and various measurements are performed. As this measurement, for example, a measurement method for calculating the fiber number concentration using a phase contrast microscope, a measurement method for calculating the inorganic fiber concentration or asbestos fiber number concentration using a phase difference / dispersion microscope, and a scanning electron microscope are used. A measurement method for calculating the asbestos fiber number concentration is performed. By these measurements, it is possible to grasp the scattered state of the substance to be collected at the site.

  According to the wind pressure scattering collection device 1 according to the present embodiment, the casing 10 in which the air blowing unit 20 and the collection unit 30 are provided is sealed by bringing the edge of the opening 12 into close contact with the target surface 2. By being configured so that the formed space can be formed, a test such as an air erosion test can be performed in the field, and the trapped substance 3 such as a fibrous substance can be collected. It is possible to grasp the scattering situation at the site. Moreover, since the wind pressure scattering collection apparatus 1 which concerns on this embodiment is formed in the small size which can carry the housing | casing 10, it can be used easily on the spot.

  The wind pressure scattering collection device according to the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical idea of the present invention. For example, in the wind pressure scattering collection device 1 according to the present embodiment, the opening 12 of the housing 10 is formed by opening the upper surface, but the present invention is not limited to this, and the opening 12 may be formed according to the purpose. The size can be freely set, and it may be formed on a surface other than the upper surface.

  Moreover, in the wind pressure scattering collection apparatus 1 which concerns on this embodiment, although the air spraying part 20 was provided with the porous tube 22, the rotation apparatus 24, and the air pump (not shown), it is not limited to this, It is sufficient if air can be blown onto the target surface 2. Moreover, in the wind pressure scattering collection apparatus 1 which concerns on this embodiment, although the porous tube 22 was comprised so that 1 rotation might be centered on the axis | shaft, it is not limited to this, Air is supplied to the range of the opening 12 of the housing | casing 10. You may comprise so that it may reciprocate around the axis | shaft with the amplitude which can be sprayed. Furthermore, in the wind pressure scattering collection device 1 according to the present embodiment, the porous tube 22 has four holes 23 formed at equal intervals in the axial direction. It is sufficient that a hole is formed.

  Furthermore, in the wind pressure scattering collection device 1 according to the present embodiment, the collection unit 30 includes the collection member 32, the holder 34, and the support member 36. Any material that can collect the substance 3 may be used. For example, the substance 3 to be collected is not connected to the suction device that can suck the air in the housing 10 and is not sucked from the back side of the collecting member 32. You may select the collection member 32 which can collect.

  DESCRIPTION OF SYMBOLS 1 Wind pressure scattering collection apparatus, 2 Target surface, 3 material to be collected, 10 housing | casing, 12 opening, 20 air spraying part, 30 collection part

Claims (7)

A housing having an opening on one surface and capable of forming a sealed space by bringing the edge of the opening into close contact with the target surface;
An air blowing section provided in the housing and capable of blowing air onto the target surface;
A wind pressure scattering collection device, comprising: a collection unit provided in the housing and capable of collecting a substance to be collected floating in the housing. The wind pressure scattering collection device according to claim 1, wherein the collection unit is provided at a position away from the air blowing unit with respect to the opening of the housing. The air blowing part is
A porous tube having a plurality of holes formed in the axial direction so as to face the target surface;
The wind pressure scattering collection device according to claim 1, further comprising: an air supply device that supplies air into the porous tube. The wind pressure scatter collecting device according to claim 3, wherein the perforated pipe is configured to be able to change the blowing direction of air over time. The collection unit is connected to a suction device capable of sucking air in the housing, and is configured to collect a substance to be collected contained in the air sucked by the suction device. The wind pressure scattering collection device according to any one of claims 1 to 4. The wind pressure scattering collection device according to any one of claims 1 to 5, wherein the collection unit includes a dust collection member capable of collecting dust. The wind pressure scattering collection device according to any one of claims 1 to 5, wherein the collection unit includes a gas adsorption member capable of adsorbing gas.

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