CN202433043U - Wide-range-ratio pore-plate differential-pressure-type flowmeter - Google Patents
Wide-range-ratio pore-plate differential-pressure-type flowmeter Download PDFInfo
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- CN202433043U CN202433043U CN 201120574233 CN201120574233U CN202433043U CN 202433043 U CN202433043 U CN 202433043U CN 201120574233 CN201120574233 CN 201120574233 CN 201120574233 U CN201120574233 U CN 201120574233U CN 202433043 U CN202433043 U CN 202433043U
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- circular hole
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Abstract
The utility model relates to a flowmeter, and aims at providing a wide-range-ratio pore-plate differential-pressure-type flowmeter which comprises a high-pressure-end pressure measurement port and a low-pressure-end pressure measurement port which are arranged on a measured pipeline, wherein the two measurement ports are connected with a differential-pressure-type sensor respectively through pressure guide pipes. The utility model further comprises a changeable pore plate mounted in a valve pipeline through a support, the changeable pore plate is provided with a base plate and wing plates positioned on two sides of the base plate, the wing plates and the fixed base plate are not on the same plane, the two wing plates has identical shapes and structures and are mutually symmetrical, and each of the wing plates is provided with at least one circular hole. The changeable range flowmeter has the advantages that the changeable range flowmeter is changeable in measuring range ratio, small in throttling resistance loss, low in cost, convenient to produce and the like and can be widely applied to flow measurement of changeable-flow fluid systems such as air conditioning systems and hot water supplying systems.
Description
Technical field
The utility model relates to flowmeter, particularly a kind of orifice differential pressure formula flowermeter of wide-range ratio.
Background technology
The accurate measurement of flow is a crucial link in the Industrial Engineering, and it realizes automatic real-time control for Industrial Engineering, and an important parameters is provided.Differential pressure flowmeter does not need the real advantage such as fixed of failing to be sold at auction with simple in structure, stable, processing with when using conformance with standard, become the most frequently used flow instrument device in the existing flowmeter.Wherein, the standard orifice plate flowmeter be research both at home and abroad the earliest, experimental data at most, use experience is the abundantest, standardization level is the highest measurement means.
It is constant that traditional pore plate flow measurement device can only be provided with coefficient of flow; When the fluctuations in discharge scope bigger; When especially low discharge is measured, because coefficient of flow will cause very big substantial measurement errors because of Reynolds number (Re) influence, thereby the range ratio relative narrower of definition and single.After adopting ISO 05167 (2003) standard in the world, to having proposed harsher requirement on the installation of classical orifice plate, the working service.
Some publications all are intended to improve and design on installation, measurement computing formula or the version to orifice plate at present.Installation accuracy is high, the pressure loss is big because standard orifice plate requires; In actual engineering, satisfy technological requirement not too easily fully; Therefore a series of patented technologies of standard orifice plate remodeling occurred, made so that orifice plate measurement mechanism, pressure obtaning device, mounting flange are inherited incorporate standard design.
Based on the flow rate calculation formula of orifice differential pressure principle, some patented technology or computing method about flow correction have been proposed also.Present standard orifice plate measurement range is about 4: 1 (scope of definition orifice plate is 4) generally, and its reason is receiving the influence of Reynolds number (Re) variation too big with coefficient of flow.Standard orifice plate corresponding pressure loss value inherent shortcoming bigger than normal is difficult to avoid always, if standard orifice plate is carried out Transform Type design, can obviously reduce the pressure loss of flow apparatus, the range ratio of raising flow measurement.
With the flowmeter extension product that orifice plate differential pressure measurement flow principle is the basis, have simple in structure, easy to use, highly versatile equally, cheap etc. a bit be used widely.
The at present known wide-range unit rate of flow counter device that does not also have to find to measure based on orifice differential pressure the flow principle utilizes this device just can realize the orifice differential pressure formula flow measurement of low pressure loss, changeable flow range ratio.
The utility model content
The technical matters that the utility model will solve is, overcomes the defective that existing flowmeter exists, and a kind of orifice differential pressure formula flowermeter of wide-range ratio is provided.
In order to solve the problems of the technologies described above, the utility model is realized through following technical scheme.
The utility model provides a kind of orifice differential pressure formula flowermeter of wide-range ratio, comprises high-pressure side pressure survey mouth and the low pressure end pressure survey mouth be located on the tested pipeline, and two measuring port link to each other with differential sensor respectively through connecting pipe; Comprise that also one is installed on the variable orifice in the conduit through support; This variable orifice has base plate and the wing plate that is positioned at the base plate both sides, and wing plate and fixed base plate are not in the same plane; Two wing plates are of similar shape and structure and symmetrical, are provided with a circular hole on each wing plate at least.
As a kind of improvement, the center of circle that two circular holes and circular hole are set on each wing plate at least is positioned on the same circular arc, and the center of circle of the circular hole on two wing plates all is positioned on the same sphere.
As a kind of improvement, two groups of circular holes are set on each wing plate at least, have at least the center of circle of two circular holes and every group of circular hole all to be positioned on the same circular arc in every group; The center of circle of two groups of symmetrical circular holes all is positioned on the same sphere on two wing plates.
As a kind of improvement, said high-pressure side pressure survey mouth is installed on the head piece of going into of tested pipeline.
As a kind of improvement, said low pressure end pressure survey mouth is installed on the head piece that of tested pipeline.
As a kind of improvement, said differential pressure pickup links to each other with intelligent controller through signal wire.
As a kind of improvement, when the circular hole on each wing plate more than or when equaling two, circular hole should be evenly arranged on the wing plate.
As a kind of improvement, said base plate is provided with fixed via, and variable orifice is installed on the support through bolt.
In the utility model; When said variable orifice is worked; Evenly the cross section area of circular hole changes; The minimum through bore diameter d of streamlined orifice plate changes, and the blockage factor a of the streamlined orifice plate of confirming than β=d/D according to the aperture of orifice fitting also changes thereupon, thereby changes the measurement range of flow.
Compare with background technology, the beneficial effect of the utility model is:
Advantages such as the changeable fluid meter device of the utility model has the range of measurement variable ratio, the throttle resistance loss is little, cost is low, processing and fabricating is convenient.Can be widely used in the flow measurement of unsteady flow amount fluid systems such as air-conditioning, hot-water supply system.
Description of drawings
Fig. 1 is the scheme of installation of variable orifice.
Fig. 2 is the variable orifice structure vertical view in the specific embodiment 1.
Fig. 3 is the variable orifice structure side view in the specific embodiment 1.
Fig. 4 is the variable orifice structure vertical view of another embodiment 2.
Embodiment
The utility model provides the orifice differential pressure formula flowermeter of the wide-range ratio among Fig. 1, comprises that the high-pressure side pressure survey mouth of being located on the tested pipeline 2 links to each other with differential sensor respectively through connecting pipe with 5, two measuring port of low pressure end pressure survey mouth; Comprise that also one is installed on the variable orifice 4 in the conduit 3 through support; This variable orifice 4 has base plate and the wing plate that is positioned at the base plate both sides, and wing plate and fixed base plate are not in the same plane; Two wing plates are of similar shape and structure and symmetrical, are provided with a circular hole on each wing plate at least.Said base plate is provided with fixed via, and variable orifice is installed on the support through bolt.
As a kind of malformation, the center of circle that two circular holes and circular hole are set on each wing plate at least is positioned on the same circular arc, and the center of circle of the circular hole on two wing plates all is positioned on the same sphere.Perhaps, two groups of circular holes are set at least on each wing plate, have at least the center of circle of two circular holes and every group of circular hole all to be positioned on the same circular arc in every group; The center of circle of two groups of symmetrical circular holes all is positioned on the same sphere on two wing plates.When the circular hole on each wing plate more than or when equaling two, circular hole should be evenly arranged on the wing plate.
Said high-pressure side pressure survey mouth is installed on the head piece of going into of tested pipeline, and said low pressure end pressure survey mouth is installed on the head piece that of tested pipeline.Said differential pressure pickup links to each other with intelligent controller 1 through signal wire.
Embodiment 1:
Fig. 3 is the side view of embodiment 1.
Embodiment 2:
Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive from the content of the utility model or associate all should be thought the protection domain of the utility model.
Claims (8)
1. the orifice differential pressure formula flowermeter of a wide-range ratio comprises high-pressure side pressure survey mouth and the low pressure end pressure survey mouth be located on the tested pipeline, and two measuring port link to each other with differential sensor respectively through connecting pipe; It is characterized in that, comprise that also one is installed on the variable orifice in the conduit through support; This variable orifice has base plate and the wing plate that is positioned at the base plate both sides, and wing plate and fixed base plate are not in the same plane; Two wing plates are of similar shape and structure and symmetrical, are provided with a circular hole on each wing plate at least.
2. flowermeter according to claim 1 is characterized in that, the center of circle that two circular holes and circular hole are set on each wing plate at least is positioned on the same circular arc, and the center of circle of the circular hole on two wing plates all is positioned on the same sphere.
3. flowermeter according to claim 1 is characterized in that, two groups of circular holes are set on each wing plate at least, has at least the center of circle of two circular holes and every group of circular hole all to be positioned on the same circular arc in every group; The center of circle of two groups of symmetrical circular holes all is positioned on the same sphere on two wing plates.
4. according to the flowermeter described in any one of the claim 1 to 3, it is characterized in that said high-pressure side pressure survey mouth is installed on the head piece of going into of tested pipeline.
5. according to the flowermeter described in any one of the claim 1 to 3, it is characterized in that said low pressure end pressure survey mouth is installed on the head piece that of tested pipeline.
6. according to the flowermeter described in any one of the claim 1 to 3, it is characterized in that said differential pressure pickup links to each other with intelligent controller through signal wire.
7. according to the flowermeter described in any one of the claim 1 to 3, it is characterized in that, when the circular hole on each wing plate more than or when equaling two, circular hole should be evenly arranged on the wing plate.
8. according to the flowermeter described in any one of the claim 1 to 3, it is characterized in that said base plate is provided with fixed via, variable orifice is installed on the support through bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120574233 CN202433043U (en) | 2011-12-31 | 2011-12-31 | Wide-range-ratio pore-plate differential-pressure-type flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120574233 CN202433043U (en) | 2011-12-31 | 2011-12-31 | Wide-range-ratio pore-plate differential-pressure-type flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202433043U true CN202433043U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120574233 Expired - Lifetime CN202433043U (en) | 2011-12-31 | 2011-12-31 | Wide-range-ratio pore-plate differential-pressure-type flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202433043U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696118A (en) * | 2013-12-10 | 2015-06-10 | 大陆汽车系统公司 | Sensor structure for evap hydrocarbon concentration and flow rate |
| CN104748797A (en) * | 2015-03-31 | 2015-07-01 | 浙江大学 | Double-cylinder type high-precision liquid velocity-flow meter and velocity-flow value output method |
| CN105091959A (en) * | 2015-08-11 | 2015-11-25 | 辽宁聚焦科技有限公司 | Focusing hole plate flowmeter and using method thereof |
-
2011
- 2011-12-31 CN CN 201120574233 patent/CN202433043U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696118A (en) * | 2013-12-10 | 2015-06-10 | 大陆汽车系统公司 | Sensor structure for evap hydrocarbon concentration and flow rate |
| CN104748797A (en) * | 2015-03-31 | 2015-07-01 | 浙江大学 | Double-cylinder type high-precision liquid velocity-flow meter and velocity-flow value output method |
| CN104748797B (en) * | 2015-03-31 | 2017-05-10 | 浙江大学 | Double-cylinder type high-precision liquid velocity-flow meter and velocity-flow value output method |
| CN105091959A (en) * | 2015-08-11 | 2015-11-25 | 辽宁聚焦科技有限公司 | Focusing hole plate flowmeter and using method thereof |
| CN105091959B (en) * | 2015-08-11 | 2018-06-15 | 辽宁聚焦科技有限公司 | A kind of focusing orifice flowmeter and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |