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Middle through hole movable throttling element flow meter capable of preventing blockage

A technology of throttling elements and flowmeters, which is applied in the direction of volume/mass flow generated by mechanical effects, fluid flow detection by measuring differential pressure, etc. It can solve the problems that it is not suitable for measuring dirty media and small pipe diameter flow measurement. , to achieve the effects of simple anti-clogging mechanism, long service life and high precision

Active Publication Date: 2012-08-01
盐城市双新建设投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a pressure guide tube between the fixed throttling element and the differential pressure gauge, which is not suitable for measuring dirty media or small pipe diameter flow

Method used

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  • Middle through hole movable throttling element flow meter capable of preventing blockage
  • Middle through hole movable throttling element flow meter capable of preventing blockage
  • Middle through hole movable throttling element flow meter capable of preventing blockage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] exist figure 1 In the embodiment of the above, a ring-shaped corrugated elastic diaphragm 7 with corrugated edges is respectively fitted at both ends of the moving Venturi tube 4, and the inner edges of the two elastic diaphragms 7 are connected to the inlet end of the moving Venturi tube 4 respectively. It is sealingly connected with the outlet end, and the outer edges of the two elastic diaphragms 7 are respectively in sealing connection with the front end pipe 3 and the rear end pipe 3 . The casing 5 is rigidly connected with the front end pipe 3 and the rear end pipe 3, thereby fixing the distance between the two end pipes 3 and having the function of installing other components on the casing 5. The force sensor 6 is usually composed of an elastic element and a displacement detection element. The elastic element converts the measured force into a corresponding displacement of the free end of the elastic element, and the displacement detection element converts the di...

Embodiment 2

[0048] exist figure 2 In the implementation scheme, it can be seen that this example and figure 1 Embodiment 1 is substantially the same in structure, except that the flexible filter medium 1 is not filled in the gap between the elastic diaphragm 7 and the end pipe 3, but two flexible filter media 1 are used to connect with the end pipe 3 and the moving Venturi tube 4, etc. The diameter of the cylindrical filter membrane 2, the two ends of each filter membrane 2 are respectively connected to one end of the moving Venturi tube 4 and the end tube 3 near the end, the filter membrane 2 can follow the axis of the moving Venturi tube 4 Do the same axial expansion and contraction to move to ensure that the fluid can only enter and exit the above two gaps through the filter membrane 2. The cylindrical filter membrane 2 can be made of ordinary fiber fabric, or an inorganic microfiltration membrane or an organic microfiltration membrane using membrane separation technology. When usin...

Embodiment 3

[0050] exist image 3 In the embodiment of the present invention, a U-shaped bellows 8 is respectively fitted at both ends of the moving Venturi tube 4, the rear end of the front bellows 8 is in sealing connection with the front end of the moving Venturi tube 4, and the front end of the front bellows 8 It is sealingly connected with the front end pipe 3; the front end of the rear bellows 8 is sealingly connected with the rear end of the moving Venturi tube 4, and the rear end of the rear bellows 8 is sealingly connected with the rear end pipe 3. In the gaps of the single waves within the two bellows 8 that are larger than the inner diameter of the bellows, the flexible filter medium 1 is filled to form a ring-shaped filter layer in each single wave. The wave filter layer can follow the front and rear expansion and contraction of the bellows 8 to perform corresponding axial expansion and contraction, so as to ensure that the fluid can only enter and exit the above-mentioned sin...

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Abstract

The invention discloses a middle through hole movable throttling element flow meter capable of preventing blockage, and belongs to a throttling flow meter in the technical field of automatic detection. According to a flow meter with a middle through hole movable throttling element matched with an elastic membrane or a corrugated pipe which has been applied for a patent, the flow rate is measured based on thrust of a movable throttling element by a fluid but not based on differential pressure of the fluid of a fixed throttling element, a pressure guide pipe is saved, the flow meter is applicable to measurement of a small aperture and dirty fluid, but balance liquid is required to be sealed in an anti-blockage mechanism of the flow meter, and the manufacturing process is much complex; according to the flow meter, the anti-blockage mechanism of the middle through hole movable throttling element flow meter is made of a flexible filter medium or a filter membrane; the anti-blockage mechanism has the characteristics of simple structure, easiness for implementation in process and low price of the manufactured flow meter; and because of the characteristics, the middle through hole movablethrottling element flow meter using the anti-blockage mechanism has the development prospect of substituting a differential pressure flow meter and a part of small-aperture ultrasonic flow meters.

Description

technical field [0001] The invention relates to an instrument for realizing flow detection in the technical field of automatic detection, in particular to a throttling flow detection instrument. Background technique [0002] At present, flow measurement using the throttling principle is still the most widely used. Most of the throttling devices used are fixed throttling elements, and a small part are dynamic throttling elements. Among flowmeters made using the throttling principle, differential pressure flowmeters use fixed throttling elements, while target flowmeters and rotameters use dynamic throttling elements. Commonly used fixed throttling elements include orifice plates, nozzles and venturi tubes. They have a long history of use, complete test data, and standardized products, so they are also called "standard throttling devices". In the measurement, the orifice plate, nozzle and Venturi tube are fixedly installed in the pipeline, and the fluid flows through the throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/36
Inventor 王可崇
Owner 盐城市双新建设投资有限公司
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