Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
  • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
  • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
  • G01F1/10—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission

Definitions

• the invention relates to a device for measuring the quantity of a fluid, which device comprises :
• an impeller arranged removably in the housing and a detector connected to the impeller for detecting the number of rotations of the impeller.
• Such devices which are for instance known as turbine gas meters, are used to measure gas quantities flowing through pipes.
• Such a device has a good precision, provided the flow rate remains within the operating range. At speeds below the operating range the mechanical friction in the device interferes with the measurement accuracy. At speeds above the operating range the flow along the impeller is such that here too the measurement accuracy is affected.
• the dimensions of the housing of such a device are further limited in that the connections to a pipe system must comply with standardized dimensions.
• This object is achieved with a device as according to the preamble, which device is characterized in that at least one of the inlet opening and the outlet opening is formed by a ring arranged releasably in the housing wall, and the diameter of the impeller is greater than the main dimensions of both the inlet opening and the outlet opening.
• the advantage hereof is that the surface area over which the fluid for measuring flows is enlarged so that a greater flow rate can be measured.
• the friction which is present for instance in the bearing furthermore has less influence, since a larger moment is exerted owing to the larger diameter of the impeller.
• the lower limit of the operating range is hereby decreased and the upper limit of the operating range increased. This results in a device for measuring the flow rate of a fluid with an increased operating range and with a larger maximum capacity.
• the ring is arranged in a flange arranged on the housing.
• a flange has standardized dimensions and is used to enable coupling of the device to a pipe system.
• the ring can herein comprise a packing surface. The sealing between the device and a pipe system is realized with this packing surface.
• the housing is preferably substantially tubular.
• the impeller in a preferred embodiment can be arranged in a sleeve, which sleeve can be placed in the tubular housing.
• the impeller can thus be taken out of the housing in simple manner after removal of the ring in order to be for instance replaced or reconditioned.
• a detector and a flow directing means can also be connected to the sleeve in addition to the impeller.
• Figure 1 shows a cross-sectional view of a first embodiment of the device according to the invention.
• Figure 2 shows the device of figure 1 with exploded parts.
• Figure 3 shows a cross-sectional view of a second embodiment of the device according to the invention.
• Figures 4A to 4E show different embodiments of the seal between the ring and the housing of the device according to the invention.
• Figure 1 shows a device 1 according to the invention.
• This device 1 has a tubular housing 2 with an inlet opening 3 and an outlet opening 4.
• Outlet opening 4 is formed by a standardized flange 5 arranged on housing 2.
• housing 2 In housing 2 is arranged a sleeve 6 in which a stream directing means 7 is placed. Further arranged in sleeve 6 is an impeller in the form of a turbine wheel 8 which is connected to a bearing 9.
• Inlet opening 3 is formed by a ring 10 arranged in housing 2.
• the ring 10 forms part of a standardized flange 11.
• Figure 2 shows the device 1 of figure 1 with exploded parts .
• FIG. 15 In figure is shown a second embodiment 15 according to the invention. Corresponding parts are designated with the same reference numerals and for the sake of clarity in the description will not be further elucidated.
• Inlet opening 3 of device 15 is formed by a fixed standardized flange 16.
• Outlet opening 4 is formed in this embodiment by a removable ring 17 which, together with part 18, forms a standardized flange.
• the stream directing means 7 and the turbine wheel 8 with bearing 9 coupled thereto are pushed into housing 2 as two separate parts.
• Figures 4A-4E each show a different embodiment of the sealing of ring 20-24 on the flange part with housing 25-29 thereon. For sealing purposes all rings
• FIG. 30-36 can be provided either in combination with a flat packing 37 or separately thereof.
• Figure 4C shows a sealing of the ring by means of a sealing compound 38 so as to prevent corrosion of the ring and to fix the ring.
• the radial plane of the ring 20-24 directed away from the housing can function as sealing surface of the standardized flange.

Landscapes

• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• General Physics & Mathematics (AREA)
• Measuring Volume Flow (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=27800739

Family Applications (1)

Country Status (3)

Citations (5)

• 2002
  • 2002-03-11 NL NL1020150A patent/NL1020150C2/nl not_active IP Right Cessation
• 2003
  • 2003-03-11 AU AU2003221261A patent/AU2003221261A1/en not_active Abandoned
  • 2003-03-11 WO PCT/NL2003/000181 patent/WO2003076877A2/en not_active Application Discontinuation

Patent Citations (5)

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