JPS6221351Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a technique for collecting pollutants floating in the air, such as dust, soot, and organic solvents, particularly when the source of the pollutants is mobile.

If the source of pollutants moves, unless the tip of the duct is placed as close to the source as possible, the pollutants will diffuse into the air, so it is important to efficiently collect pollutants as the source moves. is very difficult. Conventionally, fixed ducts were installed in areas where pollutants were frequently generated, and a fan was used to force the contaminated air into the duct's suction port, but the collection efficiency was not very good, and the pollutants that were not collected were often removed. Because it would diffuse into the air, we had no choice but to deal with it through general ventilation.

However, since general ventilation inevitably handles a large amount of air, there is a problem in that not only the equipment cost and operating cost are enormous, but also the cooling and heating costs increase because the amount of ventilation that has already been cooled and heated increases.

The present invention aims to provide a pivoting mobile exhaust duct to deal with pollutants from mobile sources that cannot be collected by the fixed suction ports.

The purpose of this is to collect and exhaust moving air pollutants, so that the duct has a suction port at one end and is connected to a fixed duct connected to an exhaust suction fan at the other end so that it can be moved according to the destination. a flexible duct that is supported to be horizontally pivotable around a rotation axis that is vertically erected near the joint of the flexible duct to the fixed duct and directly above the flexible duct, and a rail that is guided by the rail. A pivoting mechanism comprising a hanging fitting for suspending the flexible duct, a locking mechanism that is rotatably attached to the hanging fitting and has a locking piece that is brought into contact with the rail and a lever for rotating the locking piece. This is accomplished by a mobile exhaust duct.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. Fig. 1 is a side view of an embodiment based on the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a detailed side view of the hanging metal part interposed between the arm and the collection hood, FIG. 4 is a front view of FIG. 3.

In FIG. 1, 1 is a collection hood. The collection hood 1 has a conical funnel opening 1a that opens downward.
and a communication port 1b which is bent at right angles at the base of the collection hood 1 and fitted with one end of the flexible duct 2. As shown in FIG. 3, the flexible duct 2 can be expanded and contracted by fitting a large number of light metal rings 2b at equal intervals into the inner surface of a flexible cylindrical body 2a processed into a bellows shape. The other end of the fixed duct 3, which extends horizontally, is connected to a dust collector installed to treat the collected pollutants. It is fitted into the intake port 3a.

The lower end of the fixed duct 3 is placed on the middle bracket 4a of the frame 4 fixed to the foundation. Flexible duct 2 removed by duct diameter)
A vertical rotation shaft 4b is provided at the upper position, and an arm 5 consisting of a horizontal rail 5a made of lightweight channel material, a reinforcing material 5b, and a connecting member 5c at the bottom is attached to the vertical rotation shaft 4b. It is rotatably supported.

As shown in FIG. 3, the collection hood 1 is suspended by a plurality of hanging fittings 6 having rollers 6a that engage with the inner surface of the horizontal rail 5a. A gripping annular band 7 is suspended from above the cylindrical object 2a. Further, the outermost hanging fitting 6 is provided with a locking mechanism 8 for fixing the collection hood 1 against the collection suction force. The locking mechanism 8 is fixed to brackets 8a, 8a attached to the hanging metal fittings, and a horizontal shaft 8b rotatably attached to the brackets 8a, 8a, and is brought into contact with the rail 5a to lock the collecting hood 1 by frictional force. Locking piece 8 that fixes the
c and a lever 8d attached to one end of the horizontal shaft 8b, and the hood 1 can be moved by lifting the lever 8d.

According to the embodiment of the present invention having such a configuration, even if the pollutant generation source 9 moves to the point 9A as shown in FIG. It is now possible to collect pollutants, and as shown in Figure 2,
If the source 9 comes to a point 9B that is shifted in the direction of rotation, take action by rotating the arm 5 around the vertical rotation axis 4b and bringing the collection hood 1 to a point 1B directly above the point 9B. It is possible.

The reason why the vertical rotation shaft 4b is removed from the mounting port 3a by h is to prevent the flexible duct 2 from bending excessively, to extend the life of the flexible duct 2, and to prevent an increase in ventilation resistance due to bending. It is.

Furthermore, if the eccentric disk 8c of the locking mechanism 8 is replaced with locking teeth that mesh with a rack gear fixed to the lower surface of the horizontal rail 5a, there is an advantage that the collection hood 1 can be locked more reliably.

This configuration, especially the simple structure using a lightweight swing arm, suspension fittings with rollers, and lightweight flexible duct, enables an exhaust system with a large suction capacity (250M ³ /Min) despite a significant reduction in equipment costs. Since the duct can be easily moved and fixed directly above the pollutant source by grasping a part of the collection hood and the lever, work efficiency is greatly improved. Furthermore, since fewer pollutants are left uncollected, the overall ventilation volume can be significantly reduced, making it possible to significantly reduce fixed costs and operating costs for heating and cooling-related equipment.

In addition, in the embodiment of the present invention with few fixed parts,
Sources of contaminants under the crane, for example, when carrying the casting under the exhaust duct during gas cutting of large castings at the casting weir, interference with the crane can be easily avoided by rotating the arm. ,
It has excellent effects.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment based on the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a detailed side view of the hanging metal part interposed between the arm and the collection hood, FIG. 4 is a front view of FIG. 3. 1... Collection hood, 2... Flexible duct, 3... Fixed duct, 3a... Intake port, 4
b... Vertical rotation axis, 5... Arm, 5a... Horizontal rail, 6... Hanging bracket, 6a... Roller, 7
... Annular band, 8 ... Locking mechanism, 9 ... Contaminant generation source.

Claims (1)

[Scope of utility model registration request] a flexible duct having one end communicating with a fixed duct connected to an exhaust suction fan and having a suction port at the other end extending horizontally from the one end, and near a joint of the flexible duct to the fixed duct, and
a rail supported so as to be horizontally rotatable about a rotation axis vertically erected directly above the flexible duct; a hanging fitting that is guided by the rail and suspends the flexible duct; A swingable exhaust duct comprising a locking mechanism having a locking piece that is freely attached and brought into contact with the rail and a lever for rotating the locking piece.