Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
  • B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
  • B08B15/002—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using a central suction system, e.g. for collecting exhaust gases in workshops
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
  • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
  • B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
  • B23Q11/08—Protective coverings for parts of machine tools; Splash guards

Definitions

• Some of the compounds contained in metalworking fluids are volatile; thus they pass through particle filters as vapors. Practical tests have shown that a notable part of cutting oils or emulsions (measured as concentrations) pass through particle filters as vapors. Furthermore, it has been observed that the emission of volatile compounds from filters continues even if no new aerosols are introduced, if there is airflow in the filter unit. Compounds that pass through the filter may enter the workspace air (e.g. formaldehyde) or reattach themselves to various surfaces in the workspace. In practice, it is often observed at for example machine shops that metalworking fluids have become attached to the surfaces of machines and equipment, even if HEPA filters are being used. After some months of operation, a layer of cutting fluid has also been discovered on the recirculation vent of the local exhaust ventilation system. Aerosols have also often become accrued inside the filter unit, leading to clogged draining openings etc.
• the main prerequisites for the optimal operation of the method and apparatus according to the invention are, firstly, that the sufficiency of local exhaust ventilation flow rate of e.g. the machining booth is monitored and adjusted by a computing unit through the use of a fan setup and controlled e.g. by a pressure sensor setup or the like, ensuring that pressure conditions in the machining booth and its environment are continuously correct, with no risk of air inside the machining booth "leaking out” due to, for example, insufficient negative pressure or even excess pressure.
• the exhaust air of the machining booth 1 is being processed with a pre-separator, as illustrated in principle in the accompanying drawings, such as a rotating separator utilizing centrifugal force X or like, in order to reduce the amount of pollutants in the exhaust air before it is directed to the exhaust duct 2.
• a pre-separator such as a rotating separator utilizing centrifugal force X or like
• the ventilation of a machining booth is being controlled specially on the principle illustrated in figure 1 with a computing unit 5, such as one or several microprocessors, programmable logic controller and/or the like, wherein sufficient flow rate of exhaust ventilation air from the machining booth 1 is being monitored and adjusted by the computing unit 5 by using the fan setup 3 controlled by a pressure sensor setup 6 or the like.
• condensation fluid N separated with the condensation filter unit 4a is recovered on the principle illustrated in figure 3 to a separate storage setup V and/or transmitted on the principle illustrated in figure 2 for reuse in the machining booth 1.
• condensation fluid N separated with the condensation filter unit 4a is recovered on the principle illustrated in figure 3 to a separate storage setup V and/or transmitted on the principle illustrated in figure 2 for reuse in the machining booth 1.
• the invention relates, secondly, to an apparatus for controlling of occupational hygiene in a machine tool environment, where the machine tool environment comprises at least one machining booth 1 containing one or several machine tools that utilize machining fluids, such as coolants, cutting fluids and/or corresponding substances.
• the apparatus contains a fan setup 3 for the controlling of sufficient exhaust ventilation flow from the machining booth 1 through an exhaust duct 2 by means of de-pressurizing the machining booth and the filtering and purification setup 4, such as one or several HEPA filters, activated carbon filters and/or the like, to purify exhaust air in order to enable the further processing of the exhaust air, such as recirculation, heat recovery and/or the like.
• the apparatus also includes a pre-separator setup in the machining booth 1, such as a rotating separator X utilizing centrifugal force or the like, which functions to reduce the amount of pollutants in the exhaust air before it enters the exhaust duct 2.
• the apparatus contains a condensation filter unit 4a, and most favorably a condensation heat recovery device 4a' connected thereto, to further minimize pollutants in the machining booth's 1 exhaust air.
• condensation fluid N separated with the condensation filter unit 4a is recovered on the principle illustrated in figure 3 to a separate storage setup V and/or transmitted on the principle illustrated in figure 2 for reuse in the machining booth 1.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)
• Air Conditioning Control Device (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

Country Status (3)

Cited By (2)

Citations (8)

Family Cites Families (4)

• 2017
  • 2017-01-09 EP EP17752727.2A patent/EP3419770A4/de active Pending
  • 2017-01-09 DE DE17752727.2T patent/DE17752727T1/de active Pending
  • 2017-01-09 DE DE202017007216.5U patent/DE202017007216U1/de active Active
  • 2017-01-09 WO PCT/FI2017/050007 patent/WO2017140941A1/en active Search and Examination

Patent Citations (8)

Non-Patent Citations (1)

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