Patent Application
20150096446
1. Field of the Invention
This invention relates to a dust-collecting device of a secondary dust-collecting machine.
2. Description of the Prior Art
Generally, a wood or metal processing factory will produce a large quantity of dust in processing courses to pollute the environment and unfortunately, many wood or metal processing factories nowadays are limited by their factory buildings and can hardly attain excellent effects of ventilation; therefore, dust produced in a processing course will pervade in the operation environment to endanger the operators' health if the operators work for a long period of time in such a dusty environment and inhale excessive amount of dust. In this case, a dust-collecting machine must be installed to filter and remove the dust in the operation environment for effectively solve the problems caused by dust.
A conventional dust-collecting machine includes a wind guide barrel having its circumferential wall bored with a wind intake and its bottom provided with a dust-collecting port having a dust-collecting barrel fitted thereon. The wind guide barrel further has its topside formed with a wind outlet, with a blowing fan provided at the location of the wind outlet and a filter barrel disposed on the wind outlet. Thus, outside dust accompanying air will be sucked into the wind guide barrel through the wind intake by suction produced by the blowing fan and simultaneously, the dust will sink and flow downward along the circumferential wall of the wind guide barrel in a spiral mode to have comparatively large particles contained in the dust first filtrated and removed by the dust-collecting barrel and then the remaining dust accompanying the air will flow toward the wind outlet to have the rest of the dust further filtrated and removed by the filter barrel and then exhausted back to the outside anew, attaining an effect of filtrating the dust and air in an operation environment.
However, after long-term use and observation, the inventor of this invention finds that although the conventional dust-collecting machine can function to filter slightly larger particles of dust in an operation environment, there is still a certain probability that a small quantity of dust with lighter mass may be mixed therein and unable to be removed. Therefore, the inventor of this invention endeavors to do everything better and thinks that the conventional dust-collecting machine is necessary to be ameliorated and hence devised this invention.
This invention is devised to offer a dust-collecting device of a secondary dust-collecting machine for attaining the objective of completely filtrating and removing all the dust in an operation environment by carrying out secondary dust collection for further filtering and removing the dust with lighter mass.
The dust-collecting device of a secondary dust-collecting machine in the present invention includes a wind guide barrel having its circumferential wall bored with a wind intake. The wind guide barrel has a bottom provided with a dust-collecting port and its topside disposed with a wind guide port. A dust-collecting barrel is mounted on the dust-collecting port, communicating with the wind guide barrel. A wind duct is connected with the wind guide port, bored with a dust-collecting port and installed thereon with a blowing fan at a location close by the wind guide port. A dust-collecting box is assembled on the dust-collecting port of the wind duct and communicates with the wind duct. A fixed plate is horizontally set in the interior of the dust-collecting box, positioned at the upper edge of the dust-collecting port and bored with a plurality of insert holes. A plurality of centrifugal type dust collectors are respectively fixed with the lower edges of the insert holes and respectively formed with an inner tube, which has one end secured with the insert hole and another end formed into a free end. An outer tube is fitted around the inner tube, having one end hermetically connected with the circumferential side of the inner tube and another end gradually contracted to form a convergent portion having an opening formed at the end. The outer tube further has a circumferential side provided with a wind inlet.
The dust-collecting device of a secondary dust-collecting machine of this invention functions to have outside dust accompanying air sucked into the wind guide barrel through the wind intake by the suction produced by the blowing fan. Simultaneously, the dust together with the air will spirally flow downward along the circumferential wall of the wind guide barrel to have comparatively large particles contained in the dust first filtrated and removed by the dust-collecting barrel. Then, the remaining dust together with the air will flow toward the dust-collecting box through the wind duct to have the rest of the dust with lighter mass further filtrated and removed for a second time by the centrifugal type dust collectors and after filtrated, the air will exhaust back to the outside, thus able to completely filter and remove the dust from an operation environment.
This invention will be better understood by referring to the accompanying drawings, wherein:
A preferred embodiment of a dust-collecting device 100 of a secondary dust-collecting machine in the present invention, as shown in
The wind guide barrel 10 has a circumferential wall bored with a wind intake 11 able to be connected with a pipe. The wind guide barrel 10 is gradually contracted toward the bottom, having a lower side formed with a dust-collecting opening 12 and an upper side disposed with a wind guide port 13.
The dust-collecting barrel 20 is assembled on the dust-collecting opening 12 of the wind guide barrel 10 and provided with a flexible pipe 12 for communicating the dust-collecting barrel 20 with the wind guide barrel 10.
The wind duct 30 connected with the wind guide part 13 of the wind guide barrel 10 is formed with a dust-collecting port 31 and provided with a noise reducing box 32 fixed at the location of the dust-collecting port 31. The cross-sectional area of the noise reducing box 32 is larger than that of the wind duct 30 and the noise reducing box 32 is gradually enlarged toward the dust-collecting port 31.
The blowing fan 40 is assembled on the wind dust 30 and located close by the wind guide port 13.
The dust-collecting box 50 is positioned on the dust-collecting port 31 of the wind duct 30, communicating with the wind duct 30 and provided with a transparent window 51. A fixed plate 52 is horizontally disposed in the interior of the dust-collecting box 50, set at the upper edge of the dust-collecting port 31 and bored with a plurality of insert holes 521.
The centrifugal type dust collectors 60 are respectively provided at the lower edge of the insert holes 521 of the fixed plate 52. Referring to
The filter screen 70 is mounted on the fixed plate 52.
The dust-collecting bag 80 is positioned under the dust-collecting box 50 and communicates with the dust-collecting box 50.
In using referring to
One of the special features of this invention is that the noise reducing box 32 larger than the wind duct 30 in the cross-sectional area is provided at the location of the dust-collecting port 31 of the wind duct 30, able to form a buffer space, and the noise reducing box 32 is gradually enlarged toward the dust-collecting port 31 to form a sloping guide face. Thus, when air gets into the dust-collecting box 50 through the wind duct 30, there will form a buffer at the location of the noise reducing box 32, and the air can conveniently be guided into the dust-collecting box 50 by means of the sloping guide face of the noise reducing box 32, able to lower the pressure and the flow speed of gas when the air gets into the dust-collecting box 50 and hence attain an effect of noise reduction.
While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.
