CN2689181Y

CN2689181Y - Internal gyroscopic flow measuring shutoff apparatus

Info

Publication number: CN2689181Y
Application number: CN 03262659
Authority: CN
Inventors: 刘建华; 刘毅; 陈于飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-25
Filing date: 2003-08-25
Publication date: 2005-03-30
Anticipated expiration: 2013-08-25

Abstract

The utility model relates to a gyroscopic flow capacity measuring shutoff apparatus which is suitable for flow capacity measurement for various kinds of oil, gas, and water media, such as steam, air, water, petroleum, cooling fluid, etc., and smudge media, such as various kinds of flue gas, blast furnace, and sewerage with larger dust content. The utility model is particularly suitable for the measurement of media with a low Reynolds number. Compared with a standard orifice plate, the wear and deformation of sharp edges of the utility model are improved, problems of accumulated scales of a shutoff position of various kinds of standard and non-standard orifice plates are solved, so that an efflux coefficient can be kept stable to increase the precision of measurement. The structure of the utility model (disclosed in the specification) comprises a shutoff throttle element (4), a supporting section (6) which fixes the shutoff element (4), a measurement pipeline (3), a pressure equalizing circular cavity (5), a joint flange (7) of the measurement pipeline (3) and measured pipelines, a pressure taking port (1), and a pressure taking joint nozzle (2).

Description

Interior gyroscope type flow measurement differential pressure producer

One, technical field:

The utility model relates to a kind of differential pressure type flow measurement restriction device, especially relate to a kind of various liquid (as: liquid coolant, oil, aqueous medium), gas (as: flue gas, steam, air, blast furnace gas) of being used for, it is big to be specially adapted to dustiness, the interior gyroscope type flow measurement differential pressure producer of the various dirty media that Reynolds number is low.

Two, background technology:

The present widely used flow measurement differential pressure producer that is used to measure low reynolds number and dirty class medium in industry measurement, its restricting element is " annular orifice " type structure, or " segmental orifice plate " type structure, annular orifice is to utilize fluid to cause differential pressure to record a kind of differential pressure flowmeter of flow by discoideus solid bluff body.Annular orifice central layer in fact is fixed in measuring tube central shaft position, though comparing with general standard orifice plate, it more is difficult for incrustation, and solved because the sharp edge wearing and tearing cause the efflux coefficient instability, make the problem of measuring accuracy reduction and concentricity, but because the resistance that its throttling element convection cell produces is bigger, cause crushing big, installation difficulty etc. is restricted its service condition.Segmental orifice plate then because the measuring accuracy that makes of its efflux coefficient shakiness is affected, uses thereby influence.

Three, utility model content:

The utility model provides a kind of interior gyroscope type flow measurement differential pressure producer in order to solve the weak point in the above-mentioned background technology, and its guarantees with one heart and the wearing quality pressure loss is little, be difficult for incrustation, measuring accuracy height.

For achieving the above object, the technical solution adopted in the utility model is: design a kind of interior gyroscope type flow measurement differential pressure producer, its special character is: it has the measuring channel of ring flange by two ends and the top in shape cone structure restricting element in its pipeline connects and composes; Gyro core body profile is the streamlined cone structure of gyroscope type, its cone head is streamlined bullet-shaped, one hollow top in shape cone-shaped core body is arranged thereafter, the core body rear portion is fixed on the measured tube wall by the cylinder triangular support bracket, and it is concentric with the pipe maintenance, its bearing rib fluoran stream surface is streamlined, and the space between the brace rod can allow the fluid smoothness pass through.

The utility model compared with prior art has advantage and effect is as follows:

1, the utility model modern design, compact conformation is compared with general throttling element, and straight length is shortened about 70% greatly.

2, the utility model is difficult at the throttling position producing incrustation, has reduced the sharp edge wearing and tearing, has guaranteed the stable of efflux coefficient and has reduced the additive error of measuring, thereby improved measuring accuracy.The streamlined cone structure of its gyroscope type, reduce the fluid resistance in measuring process, thereby reduced the pressure loss greatly.

3, pressure port of the present utility model is along measuring the tube wall circumference uniform distribution, and pressure port is communicated with the grading ring chamber, and formation is all pressed effect.Reduce the influence of the incoming flow velocity flow profile inequality that is caused owing to preceding straight length shock resistance effectively, thereby improved measuring accuracy.

4, the utility model can be measured the dirty medium of various low reynolds numbers, has enlarged usable range.

Four, description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is A-A cut-open views of accompanying drawing 1.

Among the figure: 1, pressure port; 2, pressure connects mouth; 3, measured pipeline; 4, gyroscope type throttling element; 5, pressure port; 6, pressure connects mouth; 7, flange; 8, support member; 9, grading ring chamber; 10, grading ring chamber; 11, flange.

Five, embodiment:

Support member (8) is made up of a cylinder and three gussets, is welded on the measured pipeline (3).(7) and (11) be joint flange with tested pipeline, (9) and (10) be former and later two grading ring chambers, (1) and (5) be before and after two groups of pressure ports (last group of 6 pressure ports are located at gyroscope type throttling element (4) bottom face apart from upstream 1D section, and 6 pressure ports of another group are located at gyroscope type throttling element bottom face apart from downstream 0.5D section.D is the internal diameter of tested pipeline).(2) and (6) be out that the pressure on two grading ring chambers connects mouth.

Referring to accompanying drawing, during real work, after fluid flows through throttling element, before and after throttling element, cause differential pressure, after all press the grading ring chamber, connect mouth by the two groups of pressure ports in front and back and take out differential pressure value by pressure, utilize this differential pressure value, calculate flow, reach the purpose of measuring flow by the fluid mechanics Bernoulli equation.

The utility model not only is confined to embodiment, and it can have various deformation when reality is used, and the back support (7) when D≤300mm can be reduced to three gussets; Pressure port can be established 3-6.

Claims

1, interior gyroscope type flow measurement differential pressure producer is characterized in that: it has the measuring channel of ring flange by two ends and the top in shape cone structure restricting element in its pipeline connects and composes; Gyro core body profile is the streamlined cone structure of gyroscope type, its cone head is streamlined bullet-shaped, one hollow top in shape cone-shaped core body is arranged thereafter, the core body rear portion is fixed on the measured tube wall by the cylinder triangular support bracket, and it is concentric with the pipe maintenance, its bearing rib fluoran stream surface is streamlined, and the space between the brace rod can allow the fluid smoothness pass through.