Small-bore ultrasonic water meter

Abstract

The invention discloses a small-bore ultrasonic water meter. The water meter comprises a meter lid and a meter shell, the meter shell comprises an upper outer shell, a lower outer shell and an ultrasonic flow reflection device installed between the upper outer shell and the lower outer shell, the ultrasonic flow reflection device comprises a reflection shell, a fluid channel is formed in the reflection shell, the ultrasonic flow reflection device comprises an ultrasonic probe and a reflection body, the ultrasonic probe is embedded into the side wall, close to the upper outer shell, of the fluid channel and sealed through glue filling, and the reflection body is axially installed at an end opening of the fluid channel along the fluid channel and fixed into the fluid channel through a supporting frame. The small-bore ultrasonic water meter is good in seal performance and high in measurement precision because the ultrasonic probe does not contact with fluid media.

Description

technical field [0001] The invention belongs to the technical field of flowmeters, in particular to a small-diameter ultrasonic water meter used in urban tap water measurement. Background technique [0002] The structure of the water meter for measuring urban tap water in the prior art usually includes a watch cover and a watch case. The watch case includes an upper casing, a lower casing and an ultrasonic flow reflection device installed between the upper and lower casings. The ultrasonic flow reflection device includes a reflector The housing, reflective housing 1' is provided with a fluid channel, and the side wall of the fluid channel facing the side of the upper shell is installed with an ultrasonic probe 4', which is sealed by a sealing ring 3', while the fluid channel is facing the side wall of the side of the lower shell A reflector 2' corresponding to the ultrasonic probe 4' is installed in it, and its structure is as follows figure 1 As shown, because the ultrason...

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Problems solved by technology

[0002] The structure of the water meter for measuring urban tap water in the prior art usually includes a watch cover and a watch case. The watch case includes an upper casing, a lower casing and an ultrasonic flow reflection device installed between the upper and lower casings. The ultrasonic flow reflection device includes a reflector The housing, reflective housing 1' is provided with a fluid channel, and the side wall of the fluid channel facing the side of the upper shell is installed with an ultrasonic probe 4', which is sealed by a sealing ring 3', while the fluid channel is facing the side wall of the side of the lower shell A reflector 2' corresponding to the ultrasonic probe 4' is installed in it, and its structure is as follows figure 1 As shown, because the ultrasonic probe 4' in this structure is in contact with the fluid medium, air bubbles are likely to be generated at the contact part, which affects the measurement accuracy, and leakage is likely to occur at the sealing ring

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