Target type flow meter

Abstract

The invention relates to the field of instruments and apparatuses, and particularly discloses a target type flow meter. The target type flow meter comprises a dial plate and a detecting head. A detecting rod is connected between the dial plate and the detecting head, and the detecting head is arranged at the circle center position of the section of a pipeline. The detecting head comprises an innerfixing ring and an outer fixing ring, wherein a flow guide block is arranged on one side of the inner fixing ring, while a pressure stabilizing block is arranged on the other side of the inner fixingring. A target plate is arranged on the outside of the flow guide block. The top of the outer fixing ring is provided with a buffer ring fixedly connected to the detecting rod, and a water dividing blade is arranged at the top of the buffer ring. The arc-shaped flow guide block reduces the wear damage of the detecting head during the detection process, meanwhile, the target plate located in the middle of the flow guide block ensures the detection effect; and the pressure stabilizing block fills the back space of the detecting head, so that the fluid passes through the detecting head more stably. The water dividing blade can protect the detecting rod, reduces the winding of the detecting rod by filiform sundries and the like. A buffer space is provided when the winding cannot be avoided, thereby avoiding tight winding, so that the cleaning is convenient.

Description

technical field [0001] The invention relates to the field of instruments and meters, in particular to a target flowmeter. Background technique [0002] Target flowmeters began to be used in industrial flow measurement in the 1960s, mainly to solve the flow measurement of high-viscosity and low Reynolds number fluids. It has experienced two development stages of pneumatic meters and electric meters. Based on the measurement principle of the original strain gauge (capacitive) target flowmeter, it adopts the latest force-inductive sensor as the measurement and sensitive transmission element, and at the same time utilizes modern digital intelligent processing technology to develop a new type of flowmeter. metering instrument. [0003] The existing target flowmeter is usually a target plate insertion type, and the target plate is fixed in the management that needs to measure the flow rate, and directly contacts the impact of the fluid. However, the long-term use of the target pl...

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Problems solved by technology

[0003] The existing target flowmeter is usually a target plate insertion type, and the target plate is fixed in the management that needs to measure the flow rate, and directly contacts the impact of the fluid. However, the long-term use of the target plate will inevitably cause a series of structures of the rod and the head. Pressure loss. In recent years, there are many plans to protect the target plate, such as adding a protective cover, adding a protective ring, etc., but the impact force on the target plate after it contacts the fluid only needs to measure the flow data, and the rest should be transferred and reduced by using a flow guide device. Small wear, after diversion, a negative pressure area may be formed on the inner surface of the target plate due to the empty space, which affects the local fluid flow direction, thereby interfering with data measurement. In addition, when the target flowmeter is used in a pipeline, if the fluid is impure, the filamentous band Or other debris may be wrapped around the surface of the detection rod, causing the flowmeter to malfunction. Usually, when it is taken out for cleaning, the entangled sundries are difficult to clean, and may damage the structural parts by mistake.

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