JPH0357828B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field to which the invention pertains] The present invention relates to a cyclone device for an air cleaner, and in particular to a cyclone tube type air cleaner device that is installed and used in construction machinery, etc. that operates in an atmosphere with a lot of dust. Regarding cyclone equipment.

[Prior art and its problems]

Generally, air cleaners are installed on construction machinery and used in environments where there is a lot of dust.
If only a filtration method using a sponge or filter paper is used, the air cleaner element will become severely clogged. Therefore, conventionally, the air cleaner is installed in multiple stages to remove sand grains from the air before the filtration method. A cyclone device is provided.

A conventional example is shown in FIGS. 1 and 2. In these figures, 100 indicates an air cleaner section,
Reference numeral 101 indicates a connecting pipe connected to the filtering type air cleaner. This air cleaner section 100 includes a case body 1 having a scavenging cylinder 3, and a case body 1.
It consists of an upper lid 4 as one plate, a lower lid 5 as the other plate, and a plurality of sand grain removal means 2, which are respectively disposed at the upper and lower ends of the sand plate. This sand grain removal means 2 is composed of a cylindrical cyclone tube 6 having a swirling blade 6A fixed therein, and an air guide tube 7. The cyclone tube 6 is press-fitted into an opening 4A (see FIG. 3) provided in the upper lid 4, and during this press-fitting, as shown in FIG. A notch 4B provided in the opening 4A is fitted, thereby preventing the cyclone tube 6 from rotating. As shown in FIG. 1, the air guide tube 7 has a smaller diameter than the cyclone tube 6, has the same center as the cyclone tube 6, and is slightly intruded into the interior from its end surface. It is attached to the lower lid 4. For this reason, the air taken into the engine (not shown) first flows through the cyclone tube 6 as shown by arrow A in FIG.
, and immediately after that, the swirl vane 6
Since rotational force is applied in a certain direction by A,
It travels inside the cyclone tube 6 in a spiral shape. Therefore, the sand grains contained in the incoming air are
Due to the centrifugal force caused by the rotation, the air moves away from the center and gradually approaches the inner wall, and is eventually dispersed into the air cleaner section 100 through the gap provided between the cyclone tube 6 and the air guide tube 7. At that time, the air that flowed out at the same time as the sand grains,
The gas is discharged to the outside from the scavenging pipe 3 as shown by arrow B. On the other hand, air near the center flows into the air guide tube 7, becomes air containing almost no sand grains, and is sent to the next stage filtering type air cleaner (not shown) through the connecting pipe 101.

However, the cyclone tube 6
As mentioned above, since it is press-fitted to the top cover 4 and only has the protrusion 6B for preventing rotation, the top cover 4 may be damaged due to vibrations received during use.
If the connection between the cyclone tube 6 and the cyclone tube 6 becomes loose, the protrusions provided on the cyclone tube 6 will gradually wear out, or if an adhesive is used for this connection, the cyclone tube 6 may become loose. Since it is made of synthetic resin such as polypropylene, it is susceptible to peeling due to impact, etc., and as a result, the cyclone tube 6 not only rotates and its ability to remove sand grains is significantly reduced, but also may fall off. On the other hand, there have been disadvantages such as the process of providing the protrusions 6A and notches on the cyclone tube 6 and the top lid 4, respectively, or the assembling or fixing after application of adhesive takes time and effort. Furthermore, many of these inconveniences also occur between the air guide tube 7 and the lower lid 5.

[Purpose of the invention]

The present invention provides a cyclone device for an air cleaner that can improve the disadvantages of the prior art described above, easily and reliably fix a cyclone tube without providing any protrusions or notches, and can significantly improve its durability. Its purpose is to provide.

[Summary of the invention]

Therefore, the present invention includes a plurality of cylindrical cyclone tubes made of synthetic resin equipped with fixed swirl vanes on the intake side, and an air guide tube inserted into the exhaust port side of each of the cyclone tubes. In an air cleaner cyclone device in which each cyclone tube is attached to one plate, and each of the air guide tubes is attached to another plate, an air intake port of each of the cyclone tubes protrudes from the one plate. The above object is achieved by adopting a structure in which at least any two adjacent cyclone tubes of the side ends are fixed to each other.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on FIGS. 4 to 6.

In FIG. 4, 16 indicates a cyclone tube, and 16A indicates a swirling vane equipped on this cyclone tube 16. As shown in the figure, the cyclone tube 16 is fixed to the other adjacent cyclone tube 16 at its end via a fused portion 20 serving as a connecting portion, and is secured to the upper lid 4. ing. The other configurations are the same as those of the conventional example described above.

Next, to explain this fastening method, in FIG. 5, 4 indicates the top cover as in the conventional example, and 16
indicates a cyclone tube, and 17 indicates a press die. The cyclone tube 16 is formed with a stepped portion 16B so that the tip becomes narrower, and the cyclone tube 16 is connected to the opening 4 provided in the upper lid 4.
C, the stepped portion 1 is inserted as shown in the figure.
It comes into contact with 6B. The press die 17 has an inverted T-shape with a supporting portion 17C, and has two circular grooves 17A, 17A on the surface facing the supporting portion 17C, and a connecting groove 17B connecting the grooves 17A, 17A. It is engraved with, among them,
The diameter of the circle drawn inside the circular groove 17A is set to be approximately the same as or slightly larger than the inner diameter of the cyclone tube 16, and is configured to be concentric. Using this press die 17, the cyclone tube 16 is heated and melted as described above and attached to the upper lid 4. Specifically, the work will be carried out using the methods described below.

First, the cyclone tubes 16 are inserted into the adjacent openings 4C up to the stepped portions 16B. The pressing mold 17 is heated to a temperature at which the base material of the cyclone tube 16 melts, and then pressed in the direction of C shown in FIG. Spread around 4C. As a result, the molten portion flows through the connecting groove 17B provided in the press die 17, so that the molten portions of the two cyclone tubes 16 are eventually integrated to form the fused portion 20. When the press die 17 is rapidly cooled and removed from the cyclone tube 16, two cyclone tubes 16 having connected engaging portions are formed as shown in FIG. By sequentially applying this engagement to the cyclone tube 16, the air cleaner shown in FIG. 4 described above is formed.

Furthermore, the same method as in the above embodiment can also be applied when the above-mentioned air guide tube 7 is attached to the lower lid 5.
It can be applied as is. FIGS. 7 and 8 are examples of this case as seen from the air cleaner 101 side, and in the figures, 7 indicates an air guide tube, and 30 indicates a fusion as a connecting part formed between the air guide tubes 7, 7. Show part.

In each of the above embodiments, the cyclone tubes 16, 16, . . . or the air guide tubes 7, 7, .
Although the case where two ... are connected to each other is illustrated, the present invention is not necessarily limited to this, and three or more may be connected. Further, in the above embodiment, a method of melting and fixing was exemplified as a method of fixing between the cyclone tubes 16 and 16 and between the air guide tubes 7 and 7, but the present invention is not necessarily limited to this. It is also possible to adopt a method of fixing them to each other with an adhesive through the adhesive. 9 and 10 show an example of this case, in which a band-shaped connecting member 40 made of the same plastic as the tube 7 or 16 and having a predetermined thickness is arranged as shown in the figure, and a predetermined heating press is applied. The outer ends of the molded tubes 7 or 16 and a portion of the connecting member 40 are simultaneously melted and fused together, thereby integrating two or more tubes 7 or 16. Even in this manner, the disadvantages of the conventional example described above can be improved.

〔Effect of the invention〕

As described above, according to the present invention, a plurality of cylindrical cyclone tubes made of synthetic resin are equipped with fixed swirl vanes on the intake side, and an air guide tube inserted into the exhaust port side of each of the cyclone tubes. In the cyclone device for an air cleaner, wherein each of the cyclone tubes is attached to one plate, and each of the air guide tubes is attached to the other plate, each of the cyclone tubes protruding from the one plate. Since at least any two adjacent cyclone tubes at the ends of the tubes on the intake port side are fixed to each other, the attached state of each tube can be firmly and integrally maintained, and the external It can sufficiently resist vibrations and shocks, and therefore the inconvenience of tube rotation or falling off, which has conventionally occurred, can be significantly reduced. This eliminates the need for creating notches, etc., for fitting the protrusions, and for positioning when fitting the protrusions, thereby improving the efficiency of processing and assembly. In Section 2, since this is further applied to the air guide tube, it is possible to provide an unprecedented cyclone device for an air cleaner that has significantly improved overall productivity and greatly enhanced durability.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view showing a conventional example, Fig. 2 is a partially omitted plan view of Fig. 1, Fig. 3 is a partially enlarged view showing a part of Fig. 2, and Fig. 4 is A plan view showing an embodiment of the present invention, FIG. 5 is an explanatory diagram showing the procedure for attaching the cyclone tubes in FIG. 4, and FIG. 6 is a relationship between the cyclone tubes integrated by the method shown in FIG. 5. FIGS. 7 to 9 are explanatory views each showing an embodiment of the present invention in the air guide tube portion, and FIG. 10 is an enlarged partial explanatory view of the portion shown in FIG. 9. 4... Upper cover as one plate, 5... Lower cover as the other plate, 6, 16... Cyclone tube, 6A, 16A... Fixed swirl vane,
7... Air guide tube, 20, 30... Fusion part as a connecting part.

Claims (1)

[Claims] 1. A plurality of cylindrical cyclone tubes made of synthetic resin equipped with fixed swirl vanes on the intake port side, and an air guide tube inserted into the exhaust port side of each of the cyclone tubes. , in the cyclone device for an air cleaner in which each of the cyclone tubes is attached to one plate and each of the air guide tubes is attached to the other plate, each of the cyclone tubes protrudes from the one plate; 1. A cyclone device for an air cleaner, characterized in that at least any two adjacent cyclone tubes at the ends on the intake port side are fixed to each other. 2 A plurality of cylindrical cyclone tubes made of synthetic resin equipped with fixed swirl vanes on the intake port side, and an air guide tube inserted into the exhaust port side of each of the cyclone tubes, each of the cyclone tubes having a In an air cleaner cyclone device in which each of the air guide tubes is attached to one plate and each of the air guide tubes is attached to the other plate, a plurality of adjacent tubes of the tubes that are bored and locked from each plate are connected to each other. A cyclone device for an air cleaner, characterized in that a connecting portion is provided between the tubes, and the tubes are connected via the connecting portion.