Abstract: An explosion-proof decompression plate is provided outside the explosion-proof window of an architecture or equipment. A convex part that protrudes out of the window is formed in the center of the decompression plate, and a flange is formed around the convex part. Further, a confined space is formed inside the decompression plate that is opposite to the convex part. Several thru holes are formed on the flange, and a lock-joint portion of which the area is smaller than the thru hole is formed. Several joint ribs easily splitting are formed between the flange and the lock-joint portions to connect. Accordingly, when the air blast occurs in the architecture or equipment, the decompression plate is thrust away by the blast pressure caused by the air blast and an open mouth is formed to vent out the blast pressure.

Abstract: An oil mist separator includes a first filtrating unit, a second filter unit and a third filter unit. The first filter unit contains plural first filters and the second filter unit contains plural second filters, for sucking oil mist air to flow spirally so as to remove oil and water mixed in the mist, utilizing a centrifugal force. The third filter unit can directly remove oil and water possibly still existing in the air. So the oil mist separator can not only make air contaminated by oil totally recovered by three stages of separation, but also reduce consumption of filter to lower cost and be friendly to environment.

Abstract: A detachable air filter machine includes a base, at least one lower filter seat, a machine frame, at least one upper filter seat, an upper lid and two pressure cylinders which are stacked in sequence from bottom to top. The base includes a pair of limit members at two opposing sides thereof. The pair of limit members each is pivotally connected with a buckling member. The upper lid has a buckling portion corresponding to the buckling member for engagement of the buckling member. The user can pull the buckling member to take off the upper and lower filter seats for cleaning. The detachable air filter machine is simple in structure and can be assembled and disassembled quickly for maintenance to save time and effort.

Abstract: A fitting ring for a dust collection bag of a dust collection machine includes a hard ring member. The hard ring member has a gap to form two ends. The ends of the hard ring member are provided with a fastening unit to tighten the gap. An open end of a dust collection bag is inserted in the hard ring member and then folded outwardly in a reversed direction. The user grasps the dust collection bag and the hard ring member to fit the dust collection bag on the outlet of a dust collection machine. Finally, the fastening unit is used to tighten the gap. The fitting ring of the present invention can couple the dust collection bag to the outlet of the dust collection machine simply and conveniently. The operation can be done by a single person to save the manpower and to enhance the efficiency.

Abstract: A dust-collecting apparatus includes a hollow wind guide box having a forced-draft fan therein. The wind guide box is connected with a dust-collecting bucket and a filter bucket so as to filter external air and maintain the quality of air. A first detector is provided on the dust-collecting bucket of the dust-collecting apparatus. A second detector is provided in the wind guide box and close to the filter bucket. The first detector and the second detector are electrically connected with a display unit. Thereby, the dust-collecting apparatus is capable of reminding the user of cleaning or replacement when the capacity of the dust-collecting bucket is not enough or the filter bucket is blocked.

Abstract: An oil mist separator includes a body inside which a filtering chamber is formed for a filtering unit made up with several centrifugal dust collectors. With an air intake unit, the outside oil mist is sent into the filtering chamber. Then, the centrifugal dust collectors are used to cause a spiral airstream. With a centrifugal force caused by the spiral airstream, the oil mist is made to separate from the air. Next, the filtered air of zero pollution is vented to the atmosphere, and the separated oil mist is collected and recycled. Thus, the oil mist may be separated and the recycled oil mist may be made into a low-level oil product or a release agent used in the building industry for achievement of the effect of environmental protection.

Abstract: An oil mist separator includes a body inside which a filtering chamber is formed for a filtering unit made up with several centrifugal dust collectors. With an air intake unit, the outside oil mist is sent into the filtering chamber. Then, the centrifugal dust collectors are used to cause a spiral airstream. With a centrifugal force caused by the spiral airstream, the oil mist is made to separate from the air. Next, the filtered air of zero pollution is vented to the atmosphere, and the separated oil mist is collected and recycled. Thus, the oil mist may be separated and the recycled oil mist may be made into a low-level oil product or a release agent used in the building industry for achievement of the effect of environmental protection.

Abstract: An explosion-proof decompression plate is provided outside the explosion-proof window of an architecture or equipment. A convex part that protrudes out of the window is formed in the center of the decompression plate, and a flange is formed around the convex part. Further, a confined space is formed inside the decompression plate that is opposite to the convex part. Several thru holes are formed on the flange, and a lock-joint portion of which the area is smaller than the thru hole is formed. Several joint ribs easily splitting are formed between the flange and the lock-joint portions to connect. Accordingly, when the air blast occurs in the architecture or equipment, the decompression plate is thrust away by the blast pressure caused by the air blast and an open mouth is formed to vent out the blast pressure.

Abstract: An automatic dust debris clearing apparatus for a filter drum in a dust collector mainly comprises a guidance support. At least two dust clearing elements are provided at a side of the guidance support and arranged at an equal interval of distance, each of the dust clearing elements being provided with a mount on which much brush may exactly be arranged in each of the grooves on the walls of filterable paper in the filter drum. A drive element is provided with a barometric vat of which one end is pivoted to the central guide rod, and thus the barometric vat functions in the principle of lever to drive the dust clearing elements to turn synchronously, thereby full automatically scraping the dust debris on the filterable paper for achievement of stable operation, scrape with the even force, and long service life of filter drum.

Abstract: An airtight blade valve device for exhausting dust includes two faceplates, two side plates, plural threaded rods, a rotor and a speed-reducing motor. The two faceplates and the two side plates are assembled together by the threaded rods to make up a closed casing having an inlet and an outlet. The rotor is pivotally fitted between the two faceplates, consisting of a spindle and plural blades, and the spindle has a plurality of cut surfaces for the blades to be respectively secured thereon. Each blade has its peripheral edge respectively contact closely with the faceplate and the side plate to form closed spaces. At least one blade of the rotor will contact the arcuate portion of either of the two side plates when the rotor rotates to any position. Thus, the blades are rotated, exhausting out dust in an airtight condition.

Abstract: An emery polishing machine is provided with plural adjusting devices positioned between the opposite shaft ends of two emery polishing wheels and machine box. The adjusting devices enable the two emery-polishing wheels to be micro-adjusted to move upward and downward independently. Emery paper tapes of different-sized sands can be fitted on the two emery-polishing wheels to carry out rough and fine polishing at the same time. Two dust-collecting pipes are provided at one side of the dust-preventing cover of the machine box, and plural rollers are provided on the dust-preventing cover. Thus, after a wooden board has one side polished, it can be turned over and directly placed on the rollers on the dust-preventing cover to be moved in a feeding opening to have the other side polished. Thus a wooden board is quickly moved with less force and less space.

Abstract: An airtight blade valve device for exhausting dust includes two faceplates, two side plates, plural threaded rods, a rotor and a speed-reducing motor. The two faceplates and the two side plates are assembled together by the threaded rods to make up a closed casing having an inlet and an outlet. The rotor is pivotally fitted between the two faceplates, consisting of a spindle and plural blades, and the spindle has a plurality of cut surfaces for the blades to be respectively secured thereon. Each blade has its peripheral edge respectively contact closely with the faceplate and the side plate to form closed spaces. At least one blade of the rotor will contact the arcuate portion of either of the two side plates when the rotor rotates to any position. Thus, the blades are rotated, exhausting out dust in an airtight condition.

Abstract: A dust collector includes a main frame, a suction device, a hollow support member, upper and lower dust collecting bags, and a plurality of clamping plates. The suction device includes a housing formed with an inlet and outlet, and a blade unit for drawing and discharging dust-laden air into and from the housing via the inlet and outlet, respectively. Each clamping plate includes a mounting segment secured on an outer wall surface of the support member, a clamping segment that cooperates with the outer wall surface of the support member so as to clamp a mouth portion of the lower dust collecting bag therebetween, and a guide segment that guides the mouth portion of the lower dust collecting bag for insertion between the clamping segment and the support member.