One embodiment of the present invention provides a measurement apparatus capable of reducing an installation cost and a maintenance cost. The measurement apparatus includes: a pipe inserted and coupled to a water pipe in an in-line scheme; a thermal mass flowmeter attached to a side surface of the pipe to measure a flow rate of a fluid in the pipe; a pressure gauge attached to the side surface of the pipe to measure a pressure of the fluid; and an ultrasonic flowmeter attached to the side surface of the pipe and having a first ultrasonic wave vibration unit and a second ultrasonic wave vibration unit including an ultrasonic wave generation unit and an ultrasonic wave reception unit to measure the flow rate of the fluid in the pipe, wherein the ultrasonic flowmeter includes the first ultrasonic wave vibration unit and the second ultrasonic wave vibration unit disposed at a position facing the first ultrasonic wave vibration unit, and the second ultrasonic wave vibration unit is disposed upstream of the first ultrasonic wave vibration unit in a flow direction of the fluid.

Inline-type apparatus for remotely measuring pressure and flow in water pipe

The present invention relates to a flow rate measuring apparatus for an electric drug injection pump and a method of measuring a flow rate using the same. According to the present invention, the flow rate measuring apparatus comprises a lower case, an upper case, a heating unit, and a temperature sensor unit. The lower case includes: a plurality of sunken units distanced from each other; and an extended concave unit extended along the sunken units to be concave for placing a tube. The upper case is coupled while facing the lower case to fix the tube. The heating unit is placed on one of the sunken units to provide heat to a fluid passing through the tube. The temperature sensor unit is placed on each of the sunken units to measure the temperature of the fluid passing through the tube, wherein the tube is placed to come in contact with the heating unit and the temperature sensor unit. The flow rate measuring apparatus for an electric drug injection pump and the method of measuring a flow rate using the same are able to more precisely and accurately measure the flow rate.

Flow rate measuring apparatus and method for measuring flow rate using the same

The present invention relates to a double valve disk mass flow meter which has significantly improved assemblability and a manufacturing method thereof. To this end, the double valve disk mass flow meter comprises: an upper end nozzle (300); a lower end nozzle (400); an upper end valve disk (620); and a lower end valve disk (630).

An Assembling Test Jig of Mass Flow Meter and Manufacturing Method Thereof

The present invention relates to a double valve disk type mass flowmeter and, more specifically, to a double valve disk type mass flowmeter, which has remarkably improved assembly performance by changing design to assemble a part of multiple nozzles at a lower end, and a manufacturing method for the same. According to the present invention, the double valve disk type mass flowmeter includes: a flow rate detecting unit (3); and a flow rate control unit (4) having an upper valve disk (620) and a lower valve disk (630), which control a flow rate by opening and closing the upper nozzle (300), a lower nozzle (400), and each of the upper and lower nozzles (300, 400). The flow rate control unit (4) comprises a main body (100) and a valve body (200). The valve body (200) is an assembly which includes the upper nozzle (300), the upper valve disk (620), and the lower valve disk (630). The lower nozzle (400) is inserted into the lower part of the valve body (200) and connected at the depth in which the lower nozzle (400) is in contact with the lower valve disk (630).

Double Valve Disc Type Mass Flow Meter and Manufacturing Method Thereof

Solenoid actuator and mass flow meter using the same

PURPOSE: A mass flow meter is provided to regulate the extent of pushing a plate when deformation is generated by applying a current to a piezo valve as the height of the piezo valve can be adjusted by a female screw joining unit and a male screw joining unit. CONSTITUTION: A mass flow meter(10) comprises a body(50), a piezo valve(120), and a displacement expansion unit(100). A flow passage(60) is formed in the body to a longitudinal direction. The piezo valve opens and closes a flow of fluid passing through the flow passage. The displacement expansion unit is installed in one end portion of the piezo valve by a lever type and moves as much as expanded displacement when one end portion of the piezo valve is transformed as much as micro displacement. The displacement expansion unit comprises a plate(130), a supporting member, a spring, and an opening/closing member. The other end portion of the piezo valve is fixed to the body.

Mass flow meter and controller

The present invention relates to an on-off structure of a flow control valve to control a flow rate in a mass flow meter and, more specifically, relates to an on-off structure of a flow control valve to control the flow rate in a mass flow meter having peripheral structures surrounding a solenoid assembly, integrated and magnetized, to improve assembling feasibility and productivity of the flow control valve and preventing distortion of a line of magnetic force induced in the solenoid; thereby remarkably improving accuracy in on-off control. In the flow control valve, the present invention includes: a flow rate control plunger (22) elastically supported to be deviated from a valve seat (21) by a spring (28); and a solenoid (29) moving the plunger (22) in a direction opposite to the valve seat (21) by generating an electromagnetic field to control the flow rate, and a case (30) fixating the solenoid (29) and a housing block (27) covering the plunger (22) being integrated permanent magnets.

On-off Structure of Flow Control Valve used for Mass Flow Controller

The present invention relates to a thermal mass flow meter for measuring a flow rate and, more specifically, to a thermal mass flow meter with a sintered filter capable of improving the accuracy of a sensor tube by making stratification earlier by mounting the sintered filter in an inlet of the sensor tube of the thermal mass flow meter and preventing the sensor tube from being clogged by filtering impurities flowing into the sensor tube. The present invention, in the thermal mass flow meter measuring a mass of a fluid flowing through a bypass (3) with the sensor tube (4) including a heater (5) and a resistance thermometer (6), provides the thermal mass flow meter with the sintered filter characterized by stratifying the flow of the fluid flowing inside the sensor tube (4) and removing the impurities contained in the fluid by mounting the sintered filter (19) in the flow inlet of the sensor tube (4).

Thermal Mass Flow Meter with Sintered Filter

The present invention relates to a nozzle structure of a flow control valve of a mass flow meter employing a double valve disc and, more specifically, relates to a nozzle structure of a double disc type-flow control valve allowing a nozzle of a flow control value, which substantially controls a flow rate in such a manner that a double disc is intermittently in contact therewith to be changed to a screw-assembled type, thereby allowing a gap between nozzles to accurately correspond to a gap between value discs and remarkably improve productivity; and a manufacturing method thereof. The prevent invention provides a flow control value of a mass flow meter which controls the flow rate by controlling a plurality of nozzles (461, 462) included in a valve seat (460) by a plurality of valve discs (451, 452) respectively. In the flow control value, at least one of the nozzles (461, 462) is a prefabricated nozzle device (500) separately processed and fastened to a valve seat (460), and the prefabricated nozzle device (500) is coupled to a nozzle coupling part (550) formed on the valve seat (460) to form a nozzle.

Nozzle Structure of Flow Control Valve with Double Disk

A block connecting structure according to an embodiment of the present invention comprises: a flange having insertion recesses on an upper surface thereof and a lower surface thereof; a first block provided with a first hole penetrating an upper surface thereof and a lower surface thereof, a flange accommodation unit formed on an outer lower surface of the first hole to accommodate an upper portion of the flange, and a protrusion protruding downward from a lower end of an inner circumferential surface of the first hole to be inserted into the insertion recess on the upper surface of the flange; and a second block provided with a second hole penetrating an upper surface thereof and a lower surface thereof, a flange accommodation unit formed on an outer upper surface of the second hole to accommodate a lower portion of the flange, and a protrusion protruding upward from an upper end of an inner circumferential surface of the second hole to be inserted into the insertion recess on the lower surface of the flange. When the flange is mounted between the lower portion of the first hole of the first block and the upper portion of the second hole of the second block, the protrusions are inserted into the insertion recesses to enhance sealing to prevent leakage of a gas or a liquid flowing through the first hole and the second hole. According to the present invention, the protrusions are inserted into the insertion recesses to enhance sealing to prevent leakage of a gas or a liquid flowing through the first hole and the second hole.

Min Byung Kwang

Papers

Mass flow meter and controller

On-off Structure of Flow Control Valve used for Mass Flow Controller

Thermal Mass Flow Meter with Sintered Filter

Nozzle Structure of Flow Control Valve with Double Disk

Connecting structure for block