CN201203441Y

CN201203441Y - Knoll flowmeter

Info

Publication number: CN201203441Y
Application number: CNU2008200125331U
Authority: CN
Inventors: 贾会安
Original assignee: Individual
Current assignee: LIAONING FOCUS TECHNOLOGY CO LTD
Priority date: 2008-05-05
Filing date: 2008-05-05
Publication date: 2009-03-04
Anticipated expiration: 2018-05-05

Abstract

A knoll flowmeter comprises a testing tube characterized in that a semi-arc solid sphere is arranged in the testing tube, a pressure measuring hole is also arranged on the testing tube at both sides of the solid, an included angle of the side face arc edge of the semi-arc solid sphere and the testing tube inner wall is 45 degrees, the lower edge of the semi-arc solid sphere inscribes an arc edge with a radius of R, wherein the R>=B/2, the pressure measuring hole on the testing tube is in a range of 0.2D-1.5D near the semi-arc solid sphere edge, the diameter of the pressure measuring hole is 14-89mm. The energy-saving maintenance flowmeter not only suits for the medium flow measurement of the ordinate gas, liquid and steam, but also has good effect for the low pressure and dirty medium, has advantages of low pressure loss, anti-abrasion, anti-smudginess, high differential pressure, energy-saving and low maintenance.

Description

The cima flowmeter

Technical field

The utility model relates to a kind of flowmeter, particularly relates to a kind of have degree of precision, energy-conservation, the low differential pressure type cima flowmeter of safeguarding, is to the improvement of existing differential pressure flowmeter structure, belongs to differential pressure type flow measurement instrument manufacturing technology.

Background technology

At present, differential pressure flowmeter is to use maximum a kind of measurement instruments. generally by restriction device, differential pressure transmitter and integrating instrument three parts are formed. and restriction device commonly used has standard orifice plate, nozzle, Venturi tube, wedge shape flowmeter etc., this type of restriction device differential pressure value height, but crushing is big, the usually stifled guiding tube of dirty medium.Recent years newly occurred Verabar, pipe is clung in holder, and V awl waits the novel throttling device, and the pressure loss reduces greatly, but dirty medium is still had no idea, and is very little because of the differential pressure value of the little generation of throttling to low flow rates of fluid, makes and measures instability.

The utility model content

The purpose of this utility model is to overcome the prior art above shortcomings, provides a kind of crushing little, can measure the cima flowmeter of low pressure and dirty medium.This cima flowmeter removes and is applicable to common gases, liquid, outside rate-of flows such as steam are measured, low pressure and dirty medium there is good result equally, particularly having adopted semicircular arc solid sphere lower limb is incircle (cima) structure, make the crushing of system littler, have that crushing is little, wear-resistant, a dirt that bears dirty, differential pressure value height, energy-conservation, the low characteristics of safeguarding.

The technical scheme that the utility model provides is: this cima flowmeter, include the test body, and be characterized in that described test body is built-in with a semicircular arc solid sphere, also is provided with pressure port on the test body of these semicircular arc solid sphere both sides.

For better finishing the purpose of this utility model, the arc limit, side of the semicircular arc solid sphere in the described test body is 45 degree with test inboard wall of tube body angle, lower limb inscribe one radius of semicircular arc solid sphere is the arc limit of R, wherein said R 〉=B/2, B are the width that the semicircular arc solid sphere contacts with the test inboard wall of tube body.

For better finishing the purpose of this utility model, the pressure port on the described test body is located in the 0.2D～1.5D scope at range semicircle arc solid sphere edge, and the diameter of pressure port is 14～89 millimeters, and wherein D is the diameter of test body.

When fluid flows through ducted test body, because the variation of flow section before and after the test body, has produced certain pressure reduction, read differential pressure information, according to the funtcional relationship of differential pressure and flow, thereby draw pipeline flow.

Needs according to flow range in the practicality, the restriction of the demand of the throttling element pressure loss and flowmeter length, can adjust cima physical dimension of the present utility model, such as, ratio of height to diameter H/D, last bottom width B etc., wherein H is the height of semicircular arc solid sphere, B is the width that the semicircular arc solid sphere contacts with the test inboard wall of tube body.

Compared with prior art, the beneficial effects of the utility model are: remove and be applicable to common gases, liquid is outside rate-of flows such as steam are measured, low pressure and dirty medium there are good result equally, have that crushing is little, wear-resistant, a dirt that bears dirty, differential pressure value height, energy-conservation, the low characteristics of safeguarding.

Description of drawings

Fig. 1 provides the structural representation of embodiment for the utility model;

Fig. 2 is the side view of Fig. 1.

Embodiment

As Fig. 1～shown in Figure 2, this cima flowmeter, include test body 1, described test body 1 is built-in with a semicircular arc solid sphere 2, also be provided with pressure port 3 on the test body 1 of these semicircular arc solid sphere 2 both sides, the arc limit, side of wherein testing the semicircular arc solid sphere 2 in the body 1 is 45 degree with test body 1 inwall angle theta, lower limb inscribe one radius of semicircular arc solid sphere 2 is the arc limit of R, R 〉=B/2 wherein, B is the width that the semicircular arc solid sphere contacts with the test inboard wall of tube body, pressure port 3 on the test body 1 is located in the 0.5D～1.0D scope at range semicircle arc solid sphere 2 edges, the diameter of pressure port is 25～60 millimeters, and wherein D is the diameter of test body.

During use, with the test body 1 of cima flowmeter connect with pipeline in, when fluid flows through ducted test body 1, because the existence of semicircular arc solid sphere 2 in the test body 1, make flow section that variation take place, the camber line on semicircular arc solid sphere 2 surfaces shrinks fluid gradually, play the effect of rectifier, even small differential pressure is also very stable, owing in semicircular arc solid sphere 2 front and back, produced certain pressure reduction, read differential pressure information, the funtcional relationship of root a tree name differential pressure and flow, thus draw pipeline flow.Can adjust cima flowmeter structure size according to the needs of flow range in the practicality, the demand of the throttling element pressure loss and the restriction of flowmeter length, such as, ratio of height to diameter H/D, last bottom width B etc.

Because the lower limb of semicircular arc solid sphere 2 bottoms is incircle (cima) structure, makes the crushing of system littler, more wear-resistant; Pressure port 3 is away from vortex region, and pressure port 3 diameters are thick, can not allow dirty medium stop up.

Claims

1. a cima flowmeter includes the test body, it is characterized in that described test body is built-in with a semicircular arc solid sphere, also is provided with pressure port on the test body of these semicircular arc solid sphere both sides.

2. cima flowmeter according to claim 1, the arc limit, side that it is characterized in that the semicircular arc solid sphere in the described test body is 45 degree with test inboard wall of tube body angle, lower limb inscribe one radius of semicircular arc solid sphere is the arc limit of R, wherein said R 〉=B/2, wherein B is the width that the semicircular arc solid sphere contacts with the test inboard wall of tube body.

3. cima flowmeter according to claim 1 and 2, it is characterized in that the pressure port on the described test body is located in the 0.2D at range semicircle arc solid sphere edge～1.5D scope, the diameter of pressure port is 14～89 millimeters, and wherein D is the diameter of test body.