Flow measuring device

Active Publication Date: 2011-01-06
ORMON CORPORATION
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0029]Furthermore, according to the above aspect, the holding member containing portion having an even cross-sectional shape may be provided in the circumference surface of the space of the flow channel block that configures the main flow channel from the stopper section to one end surface of the flow channel block, a cut-out section may be formed on the orifice holding member at a part of the orifice holding member in a length direction, and the orifice holding member may be inserted into the holding member containing portion so as to contain the wall surface other than the area where the holding member containing portion is formed out of the main flow channel in the cut-out section of the orifice holding member. According to this aspect, as even a hard or rigid orifice holding member can be easily inserted into the holding member containing portion, it is possible to securely fix the orifice using the hard or rigid orifice holding member.
[0030]In a flow measuring device according to one aspect of the present invention, a groove-shaped holding member containing portion is provided in the circumference surface of the space of the flow channel block that configures the main flow channel, a projected portion is provided on an outer circumference surface of the orifice, the orifice is contained within the main flow channel by fitting the projected portion into the holding member containing portion, and the orifice is held by the orifice holding member in a stick shape inserted into the holding member containing portion. According to this aspect, as the orifice can be held by the orifice holding member having a small cross-sectional area, it is possible to stabilize the flow of the gaseous body.
[0031]In a flow measuring device according to one aspect of the present invention, the orifice within the main flow channel is held by being sandwiched by the orifice holding member fitted into the holding member containing portion from one opening of the main flow channel and anoth

Problems solved by technology

As a result, preparing flow measuring devices of flow amount ranges for various purposes becomes expensive and requires a large storage space.
However, even with this method, a stepped section was generated between the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flow measuring device
  • Flow measuring device
  • Flow measuring device

Examples

Experimental program
Comparison scheme
Effect test

Example

First Embodiment

[0067]Hereinafter, a flow measuring device according to a first embodiment of the present invention is described with reference to FIG. 10 to FIG. 17. FIG. 10 is a perspective view illustrating a flow measuring device 51 of the first embodiment. FIG. 11A is a plan view illustrating the flow measuring device 51, FIG. 11B is a cross-sectional view taken along line X-X of FIG. 11A, and FIG. 11C is a cross-sectional view taken along line Y-Y of FIG. 11B. FIG. 12 is an exploded perspective view illustrating the flow measuring device 51.

[0068]As shown in FIG. 12, the flow measuring device 51 is mainly configured by a flow channel block 52 having a main flow channel 53 and an auxiliary flow channel 56, a circuit board 60 having a flow detection element 61, a cover 62, an orifice 63, an orifice supporting spacer 65 (orifice holding member), a pair of seal rings 67, and a pair of end caps 68.

[0069]First off, a structure of the flow channel block 52 that is used for the flow m...

Example

Second Embodiment

[0094]FIG. 23 is a cross-sectional view illustrating a flow measuring device 101 according to a second embodiment of the present invention. FIG. 24 is a partially broken perspective view illustrating the flow channel block 52 that is used for the flow measuring device 101. FIG. 25A is a perspective view illustrating the orifice supporting spacer 65 that is used for the flow measuring device 101.

[0095]According to the flow measuring device 101, as shown in FIG. 25A, the cut-out section 66 is formed not along the entire orifice supporting spacer 65 such that the cut-out section 66 is shorter than the orifice supporting spacer 65. On the other hand, as shown in FIG. 24, within the main flow channel 53 of the flow channel block 52, leaving the flow channel wall 54 having the same shape and size as the cut-out section 66, the spacer container 74 is formed at the remaining area. The branch entrance 72a opens in the flow channel wall 54, and a distance sufficient for not i...

Example

Third Embodiment

[0097]FIG. 26 is a partially broken perspective view illustrating a flow measuring device 102 according to a third embodiment of the present invention. According to this embodiment, as described below, the back portion (a side where the collection exit 73a opens) of the main flow channel 53 has the same structure as that of the front portion (a side where the branch entrance 72a opens). According to the flow measuring device 102, the stopper section 75 is not provided within the main flow channel 53, and the flow channel wall 54 and the spacer container 74 are formed from the front end surface to a back end surface of the main flow channel portion 55a. Therefore, the main flow channel 53 before containing the orifice 63 and such has an even cross-sectional shape from the front end surface to the end surface of the main flow channel portion 55a.

[0098]One of the orifice supporting spacers 65 is inserted in the back side of the spacer container 74, the orifice 63 is in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A flow measuring device has a flow channel block including a main flow channel whose both ends are open, and an auxiliary flow channel that branches from the main flow channel, a flow amount measurement element provided for the auxiliary flow channel, and a branch entrance and a collection exit that open in a wall surface of the main flow channel, and that communicate to the auxiliary flow channel, so that a part of a gaseous body that flows through the main flow channel is directed to the auxiliary flow channel through the branch entrance, and the gaseous body that has passed through the auxiliary flow channel is directed back to the main flow channel through the collection exit. A holding member containing portion is provided in a depressed manner for an area excluding an area including the branch entrance and an area including the collection exit in a circumference surface of a space of the flow channel block that configures the main flow channel. An orifice is contained within the main flow channel. An orifice holding member fitted into the holding member containing portion holds the orifice by being brought into contact with the orifice. The wall surface of the main flow channel is configured by a wall surface excluding the area for which the holding member containing portion is formed out of the main flow channel and an inner surface of the orifice holding member.

Description

BACKGROUND OF THE INVENTION[0001]1. Technical Field[0002]The present invention relates to flow measuring devices, in particular, to a flow measuring device for measuring a flow amount of a gaseous body.[0003]2. Related Art[0004]A straight-tube type flow measuring device typically measures a flow velocity V of a gaseous body that flows through a flow channel 12 using a flow detection element 11, as shown in FIG. 1A or 1B, and measures a flow amount of the gaseous body within the flow channel 12 based on the measured flow velocity V and a flow channel cross-sectional area.[0005]When a certain amount of the gaseous body flows through the flow channel 12 in the flow measuring device having such a structure, the flow velocity V of the gaseous body increases if the flow channel cross-sectional area is small as shown in FIG. 1A, and the flow velocity V of the gaseous body decreases if the flow channel cross-sectional area is large as shown in FIG. 1B. On the other hand, the flow detection ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01F1/42
CPCG01F1/6845G01F5/005G01F1/6842G01F1/42G01F1/684G01F15/185
Inventor UEDA, NAOTSUGUYAMAMOTO, KATSUYUKIMAEDA, SHUJITSUJI, YUJI
Owner ORMON CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap