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Piston flowmeter

A flow meter and flow measurement technology, which can be used in the measurement of flow/mass flow, liquid/fluid solid measurement, and measurement devices, etc., and can solve problems such as reduced accuracy, liquid leakage, increased processing and assembly procedures, etc.

Inactive Publication Date: 2006-06-14
TOKYO TATSUNO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The piston-type flowmeter used in the conventional oil supply device must make the volume obtained by multiplying the product of the surface area of ​​the piston and the stroke of the piston by the number of pistons coincide with the measurement value counted by the rotation of the rotary shaft, but it will cause various problems. Dimensional changes or liquid leakage caused by wear and tear of components, or lost pulses based on the pulse emission mechanism during the action, the accuracy will be reduced
In addition, when the total number of parts is large, the number of processing and assembly processes also increases, which alone can lead to high costs.

Method used

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Embodiment Construction

[0027] Hereinafter, the present invention will be described more specifically through an illustrated embodiment. figure 1 with figure 2 For explaining the view of the piston type flowmeter of the first embodiment of the present invention, figure 1 is a cross-sectional view of a piston-type flowmeter, figure 2 A magnified view near the shaft hole.

[0028] In these views, the piston-type flowmeter of this embodiment is a flowmeter with a pulse transmitter, and fluids such as fuel oil flowing in from the inlet 1 are introduced into one side through the passages arranged on the rotary valve 2 and the valve seat 3. In the cylinder 6, one piston 7 is moved by the pressure of the fluid, and at the same time, the fluid in the other cylinder 6' passes through the other passage 5 through the outflow passage of the rotary valve 2, the central passage 8 of the valve seat 3 and the crank chamber. 26 flows out from outlet 9.

[0029] Then, the reciprocating motion of the pistons 7, 7...

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PUM

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Abstract

To provide a piston type flowmeter capable of securing measurement reliability and having a downsized device and low cost. The connecting rod (10) of the reciprocating piston (7) in a plurality of cylinders (6) is converted into the rotary motion of the drive shaft (12) through the crankshaft (11), through which the flow measuring mechanism The rotating shaft (28) of the connecting rod (10) forms a horizontal long hole (10a) corresponding to the stroke of the piston on the connecting rod (10), and the crank pin (11a) arranged on the crankshaft (11) is inserted into the horizontal long hole ( 10a), and a piston top dead center restricting portion (16) is provided at a position opposite to the top inner surface of the cylinder (6).

Description

technical field [0001] The present invention relates to a piston type flowmeter used in a fuel supply device for supplying fuel to automobiles and the like. Background technique [0002] In the past, in the fuel supply device that supplies gasoline and other fuels to automobiles, a positive displacement piston flowmeter is used to transmit the reciprocating motion of the piston sliding in the cylinder to the rotary shaft through the crankshaft, and the flow of the rotary shaft The rotation is converted into a pulse signal to detect the measurement value, or the rotation is used to drive a mechanical counter. [0003] The piston-type flowmeter used in the conventional oil supply device must make the volume obtained by multiplying the product of the surface area of ​​the piston and the stroke of the piston by the number of pistons coincide with the measurement value counted by the rotation of the rotary shaft, but it will cause various problems. Dimensional changes or fluid l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F3/14G01F3/18
Inventor 本桥俊明关谷胜彦
Owner TOKYO TATSUNO CO LTD