Construction for mounting ultrasonic transducer and ultrasonic flow meter using same

An installation structure, ultrasonic technology, applied in the direction of measuring flow/mass flow, liquid/fluid solid measurement, instruments, etc., can solve the problem of high cost

Inactive Publication Date: 2013-04-03
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In this way, since the members constituting the conventional ultrasonic vibrator have a complicated structure, there is a problem that the manufacturing cost is high.

Method used

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  • Construction for mounting ultrasonic transducer and ultrasonic flow meter using same
  • Construction for mounting ultrasonic transducer and ultrasonic flow meter using same
  • Construction for mounting ultrasonic transducer and ultrasonic flow meter using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] figure 1 It is a figure which shows the structure of the ultrasonic flowmeter which used the mounting structure of the ultrasonic transceiver which concerns on 1st Embodiment of this invention.

[0028] exist figure 1 In the flow path 2 formed on the casing 1, fluids such as LP gas and natural gas flow. The flow measurement part 3 is an area for measuring the flow rate of the fluid flowing in the flow path 2. At the flow measurement part 3, an ultrasonic transceiver 6 is arranged on the upstream side 4 of the flow path 2, and an ultrasonic transceiver 6 is arranged on the downstream side 5 of the flow path 2. An ultrasonic transceiver 7 is provided.

[0029] Ultrasonic transceiver 6 and ultrasonic transceiver 7 are connected with measuring circuit 8, and this measuring circuit 8 is used for measuring the ultrasonic propagation time between ultrasonic transceiver 6 and ultrasonic transceiver 7, and is provided with computing circuit 9, and this computing circuit 9 T...

Embodiment approach 2

[0051] Figure 4 , Figure 5 It is a figure which shows the 2nd Embodiment of this invention, Figure 4 is a diagram showing a mounting sectional view of an ultrasonic transceiver, Figure 5 It is the top view of the installation of the ultrasonic transceiver.

[0052] exist Figure 4 Among them, on the top of the stepped portion 31 of the casing 30, there are four protrusions 32 as abutment limiting parts. When the ultrasonic transceivers 6, 7 are inserted into the O-ring 34 of the mounting hole 33, This protrusion 32 prevents the outer peripheral portion 36 of the terminal plate 35 from coming into contact with the side wall portion 30 a of the housing 30 . In addition, the protrusion 32 is shaped to be in contact with the outer peripheral portion 36 of the terminal plate 35 in a longitudinal linear shape. Other structures and assembly methods with figure 2 Same, description omitted.

[0053] In the present embodiment, when the ultrasonic transducers 6 and 7 are urge...

Embodiment approach 3

[0057] Figure 6 It is a figure which shows the 3rd embodiment of this invention, Figure 6 is the installation cutaway view of the ultrasonic transceiver. exist Figure 6 Among them, the urging member 37 has a protruding portion 39 and a supporting portion 41, and the protruding portion 39 is in contact with at least three positions of the terminal board 38 of the ultrasonic transceiver 6, 7, and exerts force on the terminal board 38. The portion 41 is in contact with the outer peripheral portion 38 a of the terminal plate 38 at at least three positions, and supports the ultrasonic transducers 6 , 7 toward the center of the mounting hole 40 . The structure and assembly method of the O-ring 42 as other components, the housing 43, the screws 44 as the locking components, etc. figure 2 Same, description omitted.

[0058] In the present embodiment, when the ultrasonic transceivers 6 and 7 are urged by the protrusions 39 of the biasing member 37, the outer peripheral portion ...

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Abstract

Ultrasonic transducers (6, 7) are attached in a direction in which an O-ring (23) that is provided on a frame having a flow path is compressed. A biasing means (24) is provided which biases these ultrasonic transducers (6, 7) by coming into contact therewith at a plurality of locations. Screws (25) are provided which fix this biasing means (24) to the frame. An ultrasonic flow meter can therefore be implemented which makes it possible to use the O-ring (23) as a sealing means, is low cost, and facilitates signal processing by reducing vibrations of the ultrasonic transducers that are transmitted to the frame.

Description

technical field [0001] The present invention relates to an ultrasonic flow meter for measuring the flow rate of gas and liquid by electrically conducting an ultrasonic transceiver inserted into a casing with a control unit, thereby utilizing ultrasonic waves generated by the ultrasonic transceiver. Background technique [0002] Such a conventional ultrasonic transceiver (ultrasonic vibrator), for example, as disclosed in Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2001-159551), has the following functions: Figure 10 Such a device. Such as Figure 10 As shown, the casing 100 has a topped cylindrical shape having a top 101 , a side wall 102 , and an opening 103 . An acoustic impedance matching layer 104 is fixed on the outer wall of the top 101 of the housing 100 , and a piezoelectric body 105 is fixed on the inner wall of the top 101 of the housing 100 . [0003] On the outer wall of the side wall portion 102 of the housing 100, a support porti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/66
CPCG01F1/66G01F1/662
Inventor 尾崎行则藤井裕史宫田肇中野慎
Owner PANASONIC CORP
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