CN207816367U - Wide range orifice flowmeter - Google Patents
Wide range orifice flowmeter Download PDFInfo
- Publication number
- CN207816367U CN207816367U CN201721907195.3U CN201721907195U CN207816367U CN 207816367 U CN207816367 U CN 207816367U CN 201721907195 U CN201721907195 U CN 201721907195U CN 207816367 U CN207816367 U CN 207816367U
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- Prior art keywords
- orifice
- cone governor
- cone
- governor
- flowmeter
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Abstract
The utility model is related to a kind of wide range orifice flowmeters, the flowmeter includes testing agency, pressure pipe and measuring mechanism, measuring mechanism includes shell and orifice plate, shell is straight pipe, pressure pipe both ends are connect with testing agency and measuring mechanism respectively, throttle orifice is equipped in the middle part of orifice plate, further include cone governor and two limiting devices, the diameter of cone governor is more than the diameter of throttle orifice, cone governor is located above orifice plate, one end of cone governor is tapered, and the tapering point of cone governor is downwardly against on throttle orifice, two limiting devices are located at below top and the orifice plate of cone governor, limiting device edge and inner walls are affixed.The utility model is positioned by cone governor its own gravity, and especially cone governor can close orifice throttle hole when flow is minimum, improve the precision of orifice flowmeter.
Description
Technical field
The utility model is related to a kind of measuring devices of fluid flow in measurement pipeline, are applicable to ultra-wide range of flow
Orifice flowmeter belongs to the technical field of metering.
Background technology
Orifice flowmeter is to can be used for the flow measurement of steam, gas and water using the most wide flowmeter of application surface at present.
Traditional orifice flowmeter includes testing agency, pressure pipe and measuring mechanism, and measuring mechanism includes shell and orifice plate, and pressure pipe is located at
Orifice plate both sides, pressure pipe are connect by signal transmssion line with testing agency, and throttle orifice is equipped in the middle part of orifice plate.By measuring machine when use
Structure is connect by flange with tested pipeline.
It is numerous known, it is most important the disadvantage is that measurement range is narrow due to the limitation of orifice flowmeter inherent structure；Work as peace
When flow in the tube body of dress flowmeter is too small, orifice flowmeter cannot measure concrete numerical value.Therefore, how orifice plate is improved
The precision of flowmeter becomes the problem of urgent need to resolve.
Utility model content
The utility model provides a kind of wide range orifice flowmeter, can drop the minimum value in the range of flowmeter
Low, when the flow very little in the tube body for installing flowmeter, orifice flowmeter can also measure concrete numerical value.
Technical problem described in the utility model solves by the following technical programs：
A kind of wide range orifice flowmeter, including testing agency and pressure acquiring mechanism, pressure acquiring mechanism include pressure pipe, shell and
Orifice plate, shell are straight round tube, and one end of pressure pipe is connected to testing agency, and throttle orifice is equipped in the middle part of orifice plate, further includes being used for
The cone governor of flow-rate adjustment and upper and lower two limiting devices, the maximum gauge of cone governor are more than the diameter of throttle orifice, cone governor position
In the throttle orifice of orifice plate, the shape of the cone governor is reverse taper, and the larger diameter end of cone governor is located on throttle orifice, two
Limiting device is located at the top of cone governor and the lower section of orifice plate, and limiting device edge is solid by connecting rod with inner walls
It connects.
The both ends of above-mentioned wide range orifice flowmeter, cone governor are equipped with guide rod, and pilot hole is equipped in the middle part of limiting device,
Guide rod matches with pilot hole, and guide rod is located in pilot hole.
Above-mentioned wide range orifice flowmeter, the limiting device are rod-shaped, and the both ends of rod-shaped limiting device are fixed in shell
On inner wall.
The sidewall profiles functional expression of above-mentioned wide range orifice flowmeter, the cone governor is：The cone governor functional expression is：
Wherein, SZ：The real-time sectional area of cone governor；L：Cone height；S:The area of throttle orifice；K:Coefficient passes through real stream
Calibration obtains.
Compared with prior art, the beneficial effects of the utility model are：The utility model relies on cone governor its own gravity tune
Amount of restriction, when flow is minimum, cone governor can completely enclose orifice throttle hole, to have turned off fluid passage, prevent fluid
Abnormally leaked.In addition, when flow very little, orifice flowmeter can also be improved by the automatic adjustment of cone governor
Measurement accuracy.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the vertical view of the utility model；
Fig. 3 is the upward view of the utility model.
Each label is expressed as in figure:1. testing agency；2. pressure pipe；3. measuring mechanism；31. shell；32. orifice plate；
33. throttle orifice；34. cone governor；341. guide rod；35. limiting device；351. pilot hole.
Specific implementation mode
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
As shown in Figure 1 to Figure 2, the utility model is used to measure the flow of the fluid in vertical pipeline, the utility model packet
Testing agency 1, pressure pipe 2 and measuring mechanism 3 are included, measuring mechanism includes shell 31 and orifice plate 32, and shell is straight round tube, pressure
Pipe is located at orifice plate both sides, and pressure pipe is connect by signal transmssion line with testing agency, and throttle orifice 33 is equipped in the middle part of orifice plate, further includes
Cone governor 34 and two limiting devices 35, the diameter of cone governor are more than the diameter of throttle orifice, and cone governor is located above orifice plate, adjusts
One end of cone is tapered, and the tapering point of cone governor is downwardly against on throttle orifice, and two limiting devices are located at cone governor
Below top and orifice plate, limiting device edge and inner walls are affixed.Limiting device is preferably rod-shaped, and the two of rod-shaped limiting device
End is fixed in inner walls.
When installation, the tapering point of cone governor is downward, and flowmeter is vertically-mounted in the duct.Fluid passes through section from bottom to top
Discharge orifice, the power that fluid is moved upwards to the side wall of the tapering point of cone governor, to make cone governor and throttling bore edges be formed separately
Channel.Of different sizes with flow, cone governor and the separated degree of throttling bore edges can change.The cone governor function
Formula is：
Wherein, SZ：The real-time sectional area of cone governor；L：Cone height；S:The area of throttle orifice；K:Coefficient passes through real stream
Calibration obtains.
When cone governor moves up and down, the center line of cone governor once deviates the influence that can cause fluid flow state,
To cause the error of pressure pipe pressure.For the disalignment of cone governor, the top and bottom of cone governor are equipped with guiding
Bar 341 is equipped with pilot hole 351 in the middle part of the limiting device above and below cone governor, and guide rod matches with pilot hole, and leads
It is located in pilot hole to boom end.
Claims (4)
1. a kind of wide range orifice flowmeter, including testing agency (1) and pressure acquiring mechanism (3), pressure acquiring mechanism (3) includes pressure pipe
(2), shell (31) and orifice plate (32), shell (31) are straight round tube, and one end of pressure pipe (2) is connected to testing agency (1), hole
Throttle orifice (33) is equipped in the middle part of plate (32), which is characterized in that further include for the cone governor (34) of flow-rate adjustment and two upper and lower
Limiting device (35), the maximum gauge of cone governor (34) are more than the diameter of throttle orifice (33), and cone governor (34) is located at the section of orifice plate
In discharge orifice (33), the shape of the cone governor (34) is reverse taper, the larger diameter end of cone governor (34) be located at throttle orifice (33) it
On, two limiting devices (35) are located at the lower section of the top and orifice plate (32) of cone governor (34), limiting device (35) edge
It is affixed by connecting rod with shell (31) inner wall.
2. wide range orifice flowmeter as described in claim 1, which is characterized in that the both ends of cone governor (34) are equipped with guiding
Bar (341), limiting device (35) middle part are equipped with pilot hole (351), and guide rod (341) matches with pilot hole (351), and is oriented to
Bar (341) is located in pilot hole (351).
3. wide range orifice flowmeter as claimed in claim 2, which is characterized in that the limiting device (35) is rod-shaped, bar
The both ends of shape limiting device (35) are fixed on shell (31) inner wall.
4. wide range orifice flowmeter as claimed in claim 3, which is characterized in that cone governor (34) functional expression is：
Wherein, SZ：The real-time sectional area of cone governor；L：Cone height；S:The area of throttle orifice；K:Coefficient is determined by real fail to be sold at auction
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721907195.3U CN207816367U (en) | 2017-12-29 | 2017-12-29 | Wide range orifice flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721907195.3U CN207816367U (en) | 2017-12-29 | 2017-12-29 | Wide range orifice flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207816367U true CN207816367U (en) | 2018-09-04 |
Family
ID=63328756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721907195.3U Active CN207816367U (en) | 2017-12-29 | 2017-12-29 | Wide range orifice flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207816367U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020278A (en) * | 2017-12-29 | 2018-05-11 | 邯郸市邯钢集团信达科技有限公司 | It can accurately measure the wide range orifice flowmeter of tiny flow quantity |
-
2017
- 2017-12-29 CN CN201721907195.3U patent/CN207816367U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020278A (en) * | 2017-12-29 | 2018-05-11 | 邯郸市邯钢集团信达科技有限公司 | It can accurately measure the wide range orifice flowmeter of tiny flow quantity |
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