Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
  • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
  • G01F15/18—Supports or connecting means for meters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
  • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
  • B60R11/0229—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for displays, e.g. cathodic tubes
  • B60R11/0235—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for displays, e.g. cathodic tubes of flat type, e.g. LCD
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
  • B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
  • B60R2011/0049—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means for non integrated articles
  • B60R2011/0064—Connection with the article
  • B60R2011/0071—Connection with the article using latches, clips, clamps, straps or the like
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
  • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00

Definitions

• the invention relates to a device for attaching a measuring or
• the measuring unit may be a pressure or temperature sensor, an ultrasonic sensor, or a clamp-on flowmeter, e.g. in the form of a so-called.
• Flowbox as described in detail in a simultaneously filed with the present application patent application of the applicant.
• the offered and distributed by the applicant ultrasonic flow meters work according to the transit time difference principle.
• the transit time difference principle the different transit time of ultrasonic measurement signals in the flow direction and against the flow direction of the medium is evaluated.
• the ultrasonic measurement signals are transmitted or received alternately by the ultrasonic sensors in the flow direction and counter to the flow direction of the medium.
• the flow speed and thus, with known diameter of the tube, the volumetric flow or, if the density of the medium is known the mass flow rate can be determined.
• the ultrasonic measurement signals at a predetermined angle into the pipe in which the medium is irradiated. So that the largest possible proportion of the energy radiated into the container by an ultrasound transducer is received in the respective other ultrasound sensor, the two ultrasound sensors must have a defined distance from one another.
• the respective position of the ultrasonic sensors on the pipeline depends on the internal diameter of the pipeline and on the speed of sound of the medium. Other application parameters to which a relatively large measurement error sometimes adheres include the wall thickness of the pipeline and the speed of sound of the material of the pipeline.
• clamp-on ultrasonic flowmeters can not be used without additional assembly tools, e.g. a screwdriver, to be mounted on a pipe.
• additional assembly tools e.g. a screwdriver
• the invention has for its object to provide a device that greatly simplifies the installation of a clamp-on flowmeter on a pipeline.
• an elongated guide element is provided, on which an alignment aid and a holder for the measuring and / or display unit are arranged displaceably in the longitudinal direction of the guide element, that the alignment aid and the holder are positioned to each other, that the object is clamped between the alignment aid and the holder, and that a sprung tensioning device is provided, with which the measuring or display unit can be pressed against the object with a defined contact pressure.
• the alignment aid is preferably a prism, which rests against the pipeline in the region of two symmetrical mutually parallel contact lines extending parallel to the longitudinal axis of the pipeline.
• the holding device Due to the predetermined orientation and the centering of the holding device by means of the alignment aid, the holding device is only rotatable about the longitudinal axis of the pipeline. The two remaining degrees of freedom are defined. It is also advantageous that the weight distribution is balanced even with pipelines with a small nominal diameter. Also unstable pipes are not deformed by the attachment of the device according to the invention to the pipeline.
• the measuring unit is preferably a flow box with at least two ultrasonic sensors which determine the flow of a medium through a pipeline according to the transit time difference principle.
• the ultrasonic sensor may also be an ultrasonic sensor which determines the flow rate via the Doppler principle.
• the two ultrasonic sensors can be positioned relative to each other in such a way that always the maximum proportion of the ultrasonic measurement signals emitted by the one ultrasonic sensor is received in the second ultrasonic sensor.
• the device according to the invention for attaching a measuring and / or display unit to pipelines with small diameters is ideally suited. Due to a set, defined contact pressure between alignment aid and holder for the measuring or display unit, deformations of the pipeline can be effectively avoided. Due to the resilient mounting is also always under changing environmental conditions, especially under changing temperature conditions, always ensured that the Contact pressure is substantially constant. When coupling an ultrasonic sensor or several ultrasonic sensors to a pipeline, this is essential for a good measurement performance.
• a coupling layer e.g. a coupling mat
• This coupling layer serves to keep the proportion of the reflected measurement signals as low as possible, so that a large part of the measurement signals is coupled into the pipeline and into the medium. Since the properties of the coupling layer sometimes change depending on the pressure applied to them, it is also of great importance here that the contact pressure or the contact pressure remains substantially constant.
• the holder according to the invention is characterized by a constant surface pressure.
• the guide element is a hollow spindle. Furthermore, it is provided that a tension spring is arranged in the hollow spindle, which is fixed or fixable in the upper region by a first locking element and in the lower region by a second locking element.
• the locking device is in the simplest case a pin.
• the upper pin is rigidly connected to the bracket and mounted in a fixed position on the guide member.
• the lower pin is rigidly connected to the alignment aid and is guided in an elongated recess on the surface of the guide element and thus axially displaceable relative to the guide element within defined limits.
• the recess which is preferably a slot, is oriented in the direction of the longitudinal axis of the guide element for this purpose.
• the lower pin is positionable via a fixing unit in a fixed position in the elongated recess.
• the fixing unit is preferably a knurled screw or a pressure pin.
• the sprung Nachspann device consists of a knob and a spring element; Both are arranged in the upper region of the guide element or the hollow spindle.
• a preferred alternative provides that it is the sprung Nachspannvorraum is a quick release, which is actuated by moving a lever.
• the measuring unit is an ultrasonic sensor or a so-called flow box in which at least two ultrasonic sensors are arranged.
• FIG. 1 shows a first embodiment of the device according to the invention in a perspective view with a partial quarter section in the region of the hollow spindle
• FIG. 2 different views of the embodiment shown in Fig. 1
• Fig. 3 a second embodiment of the device according to the invention with elongated tension spring and flow box and
• Fig. 4 a third embodiment of the device according to the invention without a sensor and without prism or without Ausrichthife.
• Fig. 1 shows a first embodiment of the device according to the invention in a perspective view with a partial quarter section in the region of the guide element 6.
• Fig. 2a, Fig. 2b, Fig. 2c show different views of that shown in Fig. 1 Design to see.
• Fig. 2a shows a plan view according to the marking A-A in Fig. 1
• Fig. 2b shows a plan view according to the label B-B in Fig. 1
• Fig. 2c is a plan view according to the label C-C in Fig. 1 to see.
• the fastening device 1 is composed from a guide element 6, here a hollow spindle 6, in which a spring element 4 is arranged, a sensor holder 11, an alignment aid 2, a thumbscrew 7 and a rotary knob 3.
• the spring element 4 is designed as a tension spring, in the two end regions by pins 9 is fixed or fixable in defined positions.
• the pins 8,9 have a double function: they serve on the one hand as holding or locking pins for the spring element 4, and on the other hand they serve to guide the alignment aid 2 and the holder 11 so that always given the correct positioning of the alignment aid 2 to the sensor holder 11 is.
• the alignment aid 2 is a prism.
• the alignment aid 2 can also be a folded pin, an angle piece, a notch or a hole.
• the lower pin 9 is firmly connected to the prism 2 and in one
• Guide slot 12 here a slot, guided, or which is located in the outer wall of the hollow spindle 6.
• the fixing device 1 is tightened with the knob 3.
• a plate spring 5 is arranged, which ensures that under temperature fluctuations, which may have influence on the diameter of the pipe 15, the originally set contact pressure remains unchanged. This is particularly important in the assembly of an ultrasonic sensor 17 or the flow box 18 on a pipe, since only so it is ensured that the sensor 17 is not subsequently moved out of its defined position again.
• the tension spring 4 itself, which is mounted in the hollow spindle 6, merely represents an assembly aid, which allows the sensor 17 to be fastened quickly and without additional aids in a rough position on the pipeline 15.
• this tension spring 4 is not. It is also possible to clamp the holding device 1 by means of screws on the pipe 15.
• the plate spring 5 ensures that with temperature changes, the clamping force of the holding device 1 remains unchanged. This is important because it is the only way to ensure that the sensor 17 does not move after installation. In the case of very sensitive pipes or temporary mounting of the sensor, the tension of the tension spring may already be sufficient, so that the diaphragm spring is not absolutely necessary.
• the main advantage of the device 1 according to the invention is the fact that it can be mounted with only one clamping element on the pipe 15 with the desired contact pressure. Tools are not essential for mounting the fixture. The assembly can thus be carried out quickly, safely and easily.
• a coupling mat 20 or a coupling element is arranged between the sensor 17 and the pipe 15, which ensures in an ultrasonic sensor 17 that the highest possible proportion of the transmitted and / or received signals, the interface between the sensor 17 and pipe 15 happened.
• the coupling behavior of the coupling medium 20 are sometimes pressure-dependent, the constant maintenance of the contact pressure is in itself changing environmental conditions, and in particular temperature conditions, of great importance.
• a second embodiment of the device according to the invention is shown.
• a so-called flow box 18 is mounted on the pipe 15 here.
• the disclosure of this parallel patent application is attributable to the disclosure content of the present patent application.
• the flow box 18 at least two ultrasonic sensors 17 are arranged, which determine the flow of a medium through a pipe 15 on the transit time difference principle.
• the communication can be wireless, e.g. via radio or optical or via cable.
• Fig. 4 shows a further variant of the device according to the invention 1.
• the main difference with respect to the two previously described versions is the fact that here for the purpose of fine assembly in place of the disc spring 3 and the knob 5, a quick release 16 for Clamping the device according to the invention is used on the pipe 15.
• Corresponding quick-release fasteners are used for example in the assembly of wheels on bicycles.
• coupling medium shown here as a coupling mat

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

Applications Claiming Priority (2)

Publications (1)

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ID=39627728

Family Applications (1)

Country Status (6)

Families Citing this family (22)

Citations (1)

Family Cites Families (27)

• 2007
  • 2007-04-24 DE DE102007019610A patent/DE102007019610A1/de not_active Withdrawn
• 2008
  • 2008-04-23 JP JP2010504668A patent/JP5060616B2/ja not_active Expired - Fee Related
  • 2008-04-23 EP EP08736470A patent/EP2137502A1/de not_active Withdrawn
  • 2008-04-23 WO PCT/EP2008/054881 patent/WO2008129049A1/de active Application Filing
  • 2008-04-23 CN CN2008800136818A patent/CN101680794B/zh not_active Expired - Fee Related
  • 2008-04-23 US US12/451,077 patent/US8267365B2/en not_active Expired - Fee Related

Patent Citations (1)

Non-Patent Citations (1)

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