Elastic variable cross-section device

A variable cross-section and elastic technology, which is applied in the direction of volume/mass flow generated by mechanical effects, fluid flow detection by measuring pressure difference, etc., can solve problems such as complex control process, complex measurement pipeline, and reduced installation space to achieve extended range Ratio, increasing cross-sectional area, reducing the effect of scale

Pending Publication Date: 2020-04-14
姜春林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides an elastic cross-section device, which is used to overcome the defects in the prior art, such as complex measurement pipeline, high cost, complicated control process, and large installation space, etc., by changing the cross-sectional area of ​​the fluid pipeline during the measurement process to improve The turndown ratio of flow measurement greatly reduces the number of measuring devices, simplifies the measurement control procedure, reduces the installation space, and reduces the cost of installation, maintenance and overhaul; and the structure is simple and easy to operate

Method used

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Examples

Experimental program
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Embodiment 1

[0032] as attached figure 1 , figure 2 As shown, the embodiment of the present invention provides an elastic cross-section device, including: a detection pipeline 1, a driving part 2, an execution part 3, an axial deformation compensation pipe (such as a bellows, a casing structure, etc.) and a fixing bracket 100; Pipeline 1 is used to pass the fluid to be tested, and is made of elastic material; driving part 2 is used to provide driving force for actuator part 3; actuator part 3 is connected to the power output end of driving part 2, and is squeezed under the action of driving force Or release the detection pipeline 1 to change the cross-sectional area inside the detection pipeline. The bellows are connected between the two ends of the detection pipeline and the flow pipeline to be measured, and are used for compensating the change of the axial length of the detection pipeline caused by extrusion and deformation.

[0033] The detection pipeline 1 here is made of elastic ma...

Embodiment 2

[0044] see image 3 , Figure 4 , the moving panel 31 and the static panel 32 are rectangular, and the position is facing; the transmission mechanism 22 also includes three first linear motion output units and a gear transmission unit 5; the gear transmission unit includes four From the gear 51 and a main gear 52; the screw sleeves 221 of the four first linear motion output units are respectively fixed at the positions of the four corners of the moving panel 32; the screw rods 222 of the four first linear motion output units pass through the moving The screw sleeve 221 of the panel 32 is rotatably connected to the static panel 31 at one end (in this embodiment, the bearing 223 is connected to the static panel 32, and the bearing cover is installed on the side of the static panel 31 away from the clamping surface to encapsulate the bearing 223), The other end is respectively connected to a driven gear 51 ; the four driven gears 51 are all externally meshed with a main gear 52 ...

Embodiment 3

[0047] In another embodiment of the present invention, not shown in the figure, the execution part 3 can use the clamping mechanism to simultaneously clamp or release both sides of the detection pipeline 1 to change the cross-sectional area of ​​the detection pipeline. The clamping mechanism includes two The support arm and the hinge shaft that hinges the middle parts of the two arms together. After the two arms are hinged, they are X-shaped. One end is the actuating end and the other end is the execution end. A torsion spring is worn on the hinge shaft. In the natural state , the two arms at the actuator end are closed naturally, the two arms at the actuator end are naturally opened, and the two arms at the actuator end are opened under the action of the driving part until the two arms at the actuator end are opened to the maximum when the two arms at the actuator end are closed. Angle; when in use, the hinge axis is parallel to the central axis of the detection pipeline 1. Du...

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PUM

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Abstract

The invention discloses an elastic variable cross-section device, which comprises a detection pipeline, an axial deformation compensation pipe, a driving part and an execution part, and is characterized in that the detection pipeline is used for allowing a to-be-detected fluid to pass through and is made of an elastic material; the axial deformation compensation pipe is connected between the two ends of the detection pipeline and the flow pipeline to be detected and used for compensating axial length changes caused in the extrusion deformation process of the detection pipeline. The driving part is used for providing driving force for the executing part; and the execution part is in transmission connection with the power output end of the driving part, and extrudes or releases the detectionpipeline under the action of driving force, so that the cross sectional area in the detection pipeline is changed. The problems of complex detection pipeline, high cost, large installation space andthe like in the prior art are solved, the measuring range ratio is widened by changing the cross section of the detection pipeline on line, the cost is greatly reduced, and the installation space is reduced; simple structure and easy operation are realized.

Description

technical field [0001] The invention relates to the field of flow measurement, in particular to an elastic variable-section device used in the flow measurement process to change the cross-sectional area of ​​a fluid pipeline. It can also be used in fields such as Venturi tube blending or dust removal. [0002] And flow control valves and other fields. Background technique [0003] For the flow measurement of liquid and gas, by installing a sensor on the pipeline through which the fluid flows, the electrical signal is measured by the sensor, and the electrical signal can reflect the pressure difference of the fluid inside the pipeline, and the flow velocity of the fluid can be calculated through the pressure difference, according to the fluid The relationship between density ρ, flow velocity v and cross-section A and flow Q is: Q=ρ×v×A can obtain flow; due to the limitation of sensor measurement range, the pressure difference Δp that can be sensed is within Δp min ~Δp max ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/40
CPCG01F1/40
Inventor 姜春林吴宇清
Owner 姜春林
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