CN202033055U

CN202033055U - Dynamic pressure flow meter

Info

Publication number: CN202033055U
Application number: CN2011201426446U
Authority: CN
Inventors: 计重远
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-06
Filing date: 2011-05-06
Publication date: 2011-11-09
Anticipated expiration: 2021-05-06

Abstract

A dynamic pressure flow meter comprises a valve body provided with a valve cover, wherein the valve body is provided with an inlet and an outlet, the upper portion in the valve body is provided with a signal indication chamber, the lower portion of the valve body is provided with a rotating fluid generating chamber, a spindle arranged in the signal indication chamber is connected with one end of a spring, an indicator is arranged at the upper top of the spindle, and the other end of the spring is fixedly connected with the signal indication chamber. A magnet is fixedly connected with the spindle, the upper end faces of vanes arranged in the rotating fluid generating chamber are fixedly connected with another magnet, the vanes are installed on a support shaft, the valve cover is provided with a glass window, and the valve body and the valve cover are sealed through a sealing ring. The dynamic pressure flow meter is high in sensitivity, simple in structure, convenient to operate, capable of measuring pressure differences of flowing flows at any two points of a pipeline and dynamic pressure values of the flowing flows in the pipeline, thereby calculating flow speed of the fluid.

Description

The handkerchief table

Technical field: the utility model relates to a kind of dynamic pressure flowmeter of measuring fluid flow.

Background technology: the dynamic pressure flowmeter is a kind of flowmeter of measuring flow by the momentum of measuring fluid.Most typical have a dynamic pressure plate flowmeter, and it is to utilize a compression plate to bear the impact of fluid, and the suffered power and the gravity of compression plate balance each other, and the angle of rotating by compression plate reflects the size of flow.When measuring, because the pressure differential that produces before and after compression plate makes its characteristic very complicated by this form.Simultaneously because the stressed area of this flowmeter sensitivity and compression plate is relevant, and the face of being stressed of compression plate is subjected to the restriction in the space of pipeline, so its sensitivity is low, and this in actual applications flowmeter is used seldom.

The content of utility model: overcome the deficiencies in the prior art, the dynamic pressure that a kind of structure is novel, simple, reliable and sensitivity is high flowmeter--handkerchief table is provided.The handkerchief table it have valve body, a valve body that has a valve gap to have that its top is signal indication chamber in inlet port and flow export, the valve body, the bottom is rotating fluid generating chamber, be positioned at the indoor turning axle of signal indication links to each other with spring, pointer is positioned at the turning axle upper end, the other end of spring is connected mutually with signal indication chamber, magnet is connected mutually with turning axle, the upper surface and another piece magnet that are positioned at the impeller of rotating fluid generating chamber are connected, impeller is contained on the back shaft, and valve gap has glass window, valve body and valve gap and seals by O-ring seal.Advantage of the present utility model is to adopt the blade of impeller to impact as the momentum that bearing plate bears fluid, its stress surface is increased greatly, and the flow characteristics before and after the bearing plate is also comparatively simple.The power that while and fluid force balance each other no longer is gravity, but by a spring force that spring provided.Because it is very little that the spring constant of spring force can be obtained, and its range of linearity is very big, makes its sensitivity can do very highly, it can reach with handkerchief the measurement sensitivity of pressure reduction and dynamic pressure calculates.Another advantage of the present utility model is that structure is very simple, can directly read the result of measurement from the surface.The utility model not only can be measured streaming flow wantonly pressure differential in pipeline at 2, also can record the dynamic pressure value of streaming flow in the pipeline, thereby try to achieve flow rate of fluid.

Description of drawings:

Fig. 1 is a front view of the present utility model;

Fig. 2 is the front view of the utility model rotating fluid generating chamber;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the B-B sectional view of Fig. 2.

Embodiment:

The handkerchief table it have valve body, a valve body that has a valve gap to have that its top is signal indication chamber in inlet port and flow export, the valve body, the bottom is rotating fluid generating chamber, be positioned at the indoor turning axle 11 of signal indication links to each other with spring 10, pointer 12 is positioned at the turning axle upper end, the other end of spring 10 is connected mutually with signal indication chamber 6, magnet 9 is connected mutually with turning axle 11, the upper surface and the magnet 8 that are positioned at the impeller 7 of rotating fluid generating chamber are connected, and impeller 7 is contained on the back shaft 15.Valve gap has glass window 4, valve body and valve gap by O-ring seal 13 sealings.There are two contacts of pressure reduction to link to each other respectively with in the pipeline at the two ends of as shown in the figure handkerchief table.There is the fluid of pressure to enter valve body 2, enters rotating fluid generating chamber 5, after indoor formation rotating fluid, flow out by tangential outlet by tangential inlet from inlet port 1.Rotating flow produces acting force at the indoor blade that impacts impeller 7 simultaneously on blade, and according to theorem of momentum as can be known, this acting force be and 2 of institute's connecting line between fluid pressure difference be directly proportional.And, the turning axle 11 in impeller 7 and the signal indication chamber 6 is rotated synchronously because magnet 8 is inhaled mutually with magnet 9.Simultaneously turning axle 11 acts on simultaneously at fluid force and spring force and is issued to balance.Demonstrate the size of fluid force by the rotational angle of pointer 12, thereby just can record the pressure differential between 2 of the pipelines.If to introduce 2 pressure reduction be the dynamic pressure of fluid in pipeline, what record so is exactly the size of this dynamic pressure, thereby also can obtain the flow velocity size of fluid in pipeline.So just realized the purpose of the utility model measurement fluid flow.

Claims

1. handkerchief table, it has valve body, a valve body that has valve gap inlet port and flow export to be arranged, it is characterized in that: its top is signal indication chamber in the valve body, the bottom is rotating fluid generating chamber, be positioned at the indoor turning axle of signal indication links to each other with spring, pointer is positioned at the turning axle upper end, the other end of spring is connected mutually with signal indication chamber, magnet is connected mutually with turning axle, the upper surface and another piece magnet that are positioned at the impeller of rotating fluid generating chamber are connected, impeller is contained on the back shaft, and valve gap has glass window, valve body and valve gap and seals by O-ring seal.