摘要:
A method and system for determining the effect of precipitation on flow within a sewer network includes identifying a modeled response of the sewer to a precipitation event. Once the modeled response is identified, scaled responses to future precipitation events may be predicted, in real time, by measuring intervals of the precipitation event and calculating the scaled response as a function of the modeled response and the precipitation quantity measured during the precipitation event.
摘要:
There is disclosed a fluid flow rate economizing device having a tubular body and a reduction in the inner diameter, suitable to install inside residential, commercial or industrial hydraulic tubing at fluid intakes, meters and/or registers.
摘要:
A probe structure for inserting into and operating upon an object within a pipeline, especially a high pressure pipeline carrying liquid or gas, is characterized by two coaxial cylinders that can be either pneumatically or hydraulically actuated. A primary cylinder is adapted to be mounted onto a pipeline tee and/or valve, and includes a movable primary piston to which is fixedly attached a primary lower hollow shaft that moves with the primary piston and preferably a primary upper hollow shaft that also moves with the primary piston. The primary lower hollow shaft is adapted to selectively extend into the pipeline while the primary upper hollow shaft extends above the primary cylinder and is fixed to a secondary cylinder, such that the secondary cylinder moves with the primary piston. The secondary piston includes a secondary piston that moves independently of the first and second cylinders. A secondary hollow shaft is fixedly attached to the secondary piston and coaxially extends through the primary upper and lower hollow shaft, and a central bore in the primary piston, and is adapted to selectively extend into the pipeline. In this manner, an object attached to the primary lower hollow shaft may be inserted into the pipeline, while the secondary hollow shaft provides for a second operation to be performed on the object. Wires may extend through the secondary hollow shaft or air may be circulated therethrough for pneumatic purposes. As an alternative embodiment the automatic insertion device can comprise a removable primary cylindrical housing utilized for inserting the primary insertion tool and a secondary cylindrical housing for telescopically inserting a hollow tube.
摘要:
A mass fluid flow controller has a valve which is controlled by a controller rod which is substantially pivotally mounted on a metallic diaphragm which stretches and unstretches with the movement of the rod. The actuation of the rod movement is by the expansion and contraction of an actuator wire which is heated for the expansion and allowed to cool for the contraction. The primary fluid flow path through the controller is straight. A sensor conduit, providing a parallel sensor fluid flow path, is connected in position using metallic sealer members which extend into openings to the primary fluid flow path and which are rounded along the direction through such openings. The pressure drop, along the primary fluid flow path, to create flow through the sensor conduit, is provided by a fluid flow restrictor having a core and having lengths of wire along the core which are squeezed between the core and a tapered fluid flow path wall in the vicinity of the sensor conduit input and output connections. A spherical or a conical shape may be used for the form of the core. A valve seat bushing is mounted in pipe structure providing the primary fluid flow path by applying a force against an end surface of the bushing, with movement of the bushing blocked, in order to deform the end surface, push the outer wall of the bushing against the inner wall of the pipe structure, and fix the bushing in the pipe structure.
摘要:
A flow conditioning system includes a flow randomizing section for receiving an input fluid stream and for increasing the uniformity of the streamwise velocity components of the input fluid stream while randomizing the non-streamwise velocity components, so as to provide a randomized fluid stream; a flow expansion section for receiving the randomized fluid stream and damping the non-streamwise velocity components therein, so as to provide a damped fluid stream; and a flow straightening section for receiving the damped fluid stream and for dividing the damped fluid stream into multiple, parallel output substreams so as to provide a laminar flow profile in an output fluid stream.
摘要:
A configurable port assembly is used proximate a medium containing struct, such as a water tunnel, e.g. to measure fluid flow or inject flowing fluid into the tunnel. The configurable port assembly includes at least two configurable port assembly components assembled to define a configurable port extending from a first opening to a second opening. One or more of the configurable port assembly components can be rotated from a first to a second assembled position to define a configurable port having at least two predefined shapes. The configurable port assembly preferably includes four configurable port assembly components assembled and coupled together with coupling members, such as dowel pins, extending through the components. Two of the configurable port assembly components have shaped surfaces that define a shaped thickness of the configurable port while the other two components have shaped surfaces that define a shaped width of the port. Various shapes can be machined in the configurable port assembly components to provide numerous variations of the configurable port.
摘要:
A device for measuring the mass or flow rate of a flowing medium of the air aspirated by an internal combustion engine including an electronic control circuit, which evaluates the electrical signals of a temperature-dependent sensor element and which is accommodated together with the sensor element in a metal protective housing, for the sake of protecting the sensor element against entering electromagnetic waves (EMC protection). To reduce the expense and structure space, the device has a protective housing, which is composed in plug-together fashion of a metal bottom housing, a metal closure housing, and a metal plug part. The plug part has a plurality of leadthrough capacitors for noise suppression of the electrical connection line passed through the plug part and connected to the electronic control circuit.
摘要:
An apparatus and method of counting dispensing events or washes in a fluid dispenser in which an activator is moved from a starting position to a dispensing position and back to dispense material includes a counter which is indexable to record a dispensing event and which can only be indexed again after dispensing pressure is totally relieved from the activator for a predetermined period of time. The counter is activated by a switch carried on the activator that initiates a timer when the activator leaves the dispensing position. The timer is reset if the activator is returned to the dispensing position prior to the predetermined period of time elapsing. Only after elapse of this period of time can the counter be activated again.
摘要:
A flowmeter controller, which includes emitter sensor pairs coaxial to a rectilinear measurement tube which has a cross-section uniformly decreasing from its inlet, this latter being of annular radial extension symmetrical about the tube axis, and being provided with a grid of annular structure offering resistance to passage of the fluid under examination which increases from the outer end to the inner end of the grid, and being connected to the tube by an annular inlet duct which is curved in the shape of a circular arc with a uniformly decreasing cross-section and including a deflection fairing an axial flow deflector is provided at the tube outlet to convey the fluid into an annular duct of decreasing cross-section and the radial exit port is closable by a valving member moved along the measurement tube axis by an operating member.
摘要:
The meter has a housing with an inlet and an outlet. The housing is divided between the inlet and the outlet by a partition wall through which a measuring tube with a rectangular cross-section passes. Gas flows through the measuring tube, through which ultrasonic pulses are simultaneously transmitted by transducers disposed on the end walls. The flow rate of the gas is determined from the difference in the time of flight of the bidirectional sound pulses. The gas is directed into the measuring tube through two guidance ducts which run along both longitudinal sides of the measuring tube. Said guidance ducts are also rectangular in cross-section and each contain a flow rectifier.