CN85100330B - Flow counter of the dynamic pressure partial flow type - Google Patents
Flow counter of the dynamic pressure partial flow type Download PDFInfo
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- CN85100330B CN85100330B CN85100330A CN85100330A CN85100330B CN 85100330 B CN85100330 B CN 85100330B CN 85100330 A CN85100330 A CN 85100330A CN 85100330 A CN85100330 A CN 85100330A CN 85100330 B CN85100330 B CN 85100330B
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- flow
- connecting pipe
- bypass
- pipe
- flowmeter
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Abstract
The present invention relates to a liquid (liquid with little viscosity) measurement flow meter which is composed of a flow measurement pipe, a flow meter, a common pressure guide pipe and a pressure guide pipe, wherein one side of the pressure guide pipe is provided with a single opening, and one other end of the pressure guide pipe is closed. According to a shunting principle, the present invention utilizes partial dynamic pressure to obtain an average flow velocity in the pipes, leads partial water in a big pipeline into the flow meter on a bypass, and directly measure full flow in the big pipeline according to a ratio. The device has own bypass, the flow meter is on the bypass; the present invention has the advantages of little resistance, great flow capacity, low energy consumption, accurate measurement, wide measurement range, no influence by water hammers or moisture, long service life, capability of maintenance without cutting off a water supply, low manufacturing cost, low installation cost, etc.
Description
The present invention is a kind of instrument that is used to measure fluid flow in the pipeline.
The flowmeter that multiple survey fluid flow has been arranged.Documents of the present invention is U.S. Pat-A-3314290, IPC:GOIF5/00, and approved date: on April 18th, 1967, denomination of invention is " SHUNKFLOW METER ".
This technology is to have two holes on the axis of flow measurement tube wall, and is installed with the isometrical bypass that has flowmeter by the hole, and an end of its bypass is that the end bent spy is stretched, and the mouth of pipe is in the face of the connecting pipe of flow direction, and And is positioned at the die place of flow tube.The other end is uncovered connecting pipe, and its mouth of pipe does not exceed the flow tube inwall.All to be isometrical And be fixed in the hole on the flow measurement tube wall by identical angle of inclination two connecting pipes.This flowmeter is according to shunting principle, utilizes whole dynamic pressures to get Peak Flow Rate in the pipe, and the partially liq in the large pipeline is introduced in the flowmeter in bypass, directly measures full flow in the large pipeline by its ratio.The flowmeter of this flowmeter and existing other kind form is some progress relatively, has advantages such as simple in structure, that cost is low, erected cost is less, resistance is less.But still there are some major defects in it: range ability is very narrow, its bypass is isometrical, and there is not the function of voltage stabilization and current stabilization, and what get is full dynamic pressure, Peak Flow Rate, therefore when fluid by the time can diminish flowmeter, certainly will influence the accuracy and the serviceable life thereof of its metering, still not overcome the destruction of water hammer.In addition, it is the same with the flowmeter of other kind form, to overhaul or installs in order not arrhea, and in parallel isometrical bypass must be installed on pipeline and be furnished with three big valves.
The purpose of this invention is to provide a kind of in parallel isometrical bypass that need not on pipeline, to install, i.e. autogamy tubule footpath bypass at flowmeter own realizes not arrheaing maintenance, the replacing And of being convenient to flowmeter has simple in structure, accurate measurement, and resistance is little, broad quantum, not influenced by water hammer, the flowmeter of long service life, the metering when solving liquid (liquid that viscosity is little) and keep in repair difficult problem by large diameter pipeline.
Technical solution of the present invention is according to shunting principle, utilize the part dynamic pressure to get mean flow rate in the pipe, partially liq in the large pipeline is introduced in the flowmeter in the tubule reducing bypass that is connected with flow tube, directly measured full flow in the large pipeline by its ratio.It is realized by following technology:
Departing from and be parallel on the axis plane of flow tube, be horizontally arranged in two holes that have flange seat on the flow measurement tube wall, vertically be plugged with to have and be the connecting pipe of reducing in the flanged pipe, two valves, the bypass that flowmeter and pipe fitting constitute by two.One of them connecting pipe is to adopt a side to have the single tube of single hole one end sealing, its hole heart be positioned at the perpendicular diameter line of flow tube axis on And be positioned on the flow measurement point of mean flow rate, the aperture is in face of flow direction, its bore is greater than the diameter of orifice diameter and outlet thereof.Another connecting pipe is that single tube is uncovered, and internal diameter is greater than inlet diameter, and its port installation site must not exceed the flow tube inwall.The putting position of bypass can be vertical or level, but flowmeter should keep level.
Advantage of the present invention is: owing to adopted internal diameter is the connecting pipe that reducing has the voltage stabilization and current stabilization effect, has overcome the beat of pointer of flowmeter in metering process, thereby has improved the accuracy of metering.And connecting pipe is to depart from the flow tube axis normal to be inserted in the flow tube, and what get is mean flow rate, and resistance is little, and negotiability is big, and the range broad is generally 9 to 10, and And can overcome the destruction of water hammer to flowmeter, has prolonged serviceable life.In addition, because bypass is by valve, flowmeter and pipe fitting are formed by connecting.So, can under the situation of not arrheaing, carry out installation and maintenance, brought very big convenience thereby replaced the standby bypass ， And that is located on the pipeline to installation and maintenance, saved a large amount of expenses.
By accompanying drawing, describe one embodiment of the present of invention in detail below:
Fig. 1 is the configuration diagram of dynamic pressure partial flowmeter.
Fig. 2 is the cut-open view of flow tube.
Fig. 3 is 1
#, 2
#The cut-open view of connecting pipe.
This example is to survey the flowmeter of discharge, and it comprises that two ends have the flow tube 1 of flange, is to be formed by iron casting, has two to have flange seat 13 and depart from tube's axis and parallel to the axis two transversely arranged upright openings at flow measurement tube wall direct casting.Bypass is 6,2 ball valves 5,1 of 7,2 straight tubes of 8,2 elbows of 10,2 pipe adapters of little water meter that had nut 9 by both sides
#Connecting pipe 11 and 2
#Connecting pipe 4 constitutes (seeing shown in Figure 1).And 1
#, 2
#Connecting pipe inserts respectively in two holes on the flow measurement tube wall, and by screw 3 flange on the connecting pipe 12 is connected with flange seat 13 on the flow tube, makes them in aggregates.Be added with rubber washer 2 in the junction, wherein 2
#Connecting pipe 4 is pipes of open at both ends, and bore is greater than inlet diameter, and the port that inserts flow tube does not exceed the flow tube inwall.1
#Connecting pipe 11 is the uncovered other end welded closure of an end, and has a hole by the sidepiece of blind end pipe, leaves a small space between them, and bore is greater than orifice diameter and outlet diameter (seeing shown in Figure 3) thereof.Its hole heart be positioned at the perpendicular diameter line of flow tube axis on, and be 38% of radius apart from the pipe diapire, the aperture is towards the flange side of the close flow tube of institute.
In use, flowmeter is installed in the pipeline, makes 1
#The inlet opening of connecting pipe 11 is in face of water (flow) direction, and little water meter is on the horizontal level.When measurement of discharge, make 2 ball valves 5 be in full-gear, part water is from 1
#The inlet opening of connecting pipe 11 enters bypass, through too small water meter 10,2
#Connecting pipe 4 flows back in the large pipeline again.
Claims (3)
1, a kind of dynamic pressure partial flowmeter that is used to measure fluid flow in the pipeline, bypass with a little caliber that is connected with flow tube (1) is characterized in that the bypass of tubule footpath is constituted by having in the flanged pipe connecting pipe (11), (4) and the ball valve (5), straight tube (6), elbow (7), pipe adapter (8), the flowmeter (10) that constitute pressure-stabilizing section by reducing; Flow tube axis plane is departed from and be parallel to vertical respectively insertion the in its connecting pipe (11), (4), be horizontally arranged in the hole that has flange seat (13) on the flow measurement tube wall, by screw the flange on the connecting pipe (12) is connected with flange seat (13) on the flow tube, make it in aggregates, wherein connecting pipe (11) is that an end seals the reducer pipe that a side has single hole, its hole heart is positioned on the diameter line perpendicular to the flow tube axis, promptly is positioned on the flow measurement point of mean flow rate.
2, dynamic pressure partial flowmeter according to claim 1, the bore that it is characterized in that said connecting pipe (11) are greater than orifice diameter and outlet diameter thereof, and the bore of said connecting pipe (4) is greater than inlet diameter.
3, according to claim 1,2 described dynamic pressure partial flowmeters, it is characterized in that said connecting pipe (11), the pitch-row blind end of its sidepiece has a small space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100330A CN85100330B (en) | 1985-04-01 | 1985-04-01 | Flow counter of the dynamic pressure partial flow type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100330A CN85100330B (en) | 1985-04-01 | 1985-04-01 | Flow counter of the dynamic pressure partial flow type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100330A CN85100330A (en) | 1987-01-17 |
| CN85100330B true CN85100330B (en) | 1988-03-23 |
Family
ID=4791068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85100330A Expired CN85100330B (en) | 1985-04-01 | 1985-04-01 | Flow counter of the dynamic pressure partial flow type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85100330B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2483671B (en) | 2010-09-15 | 2016-04-13 | Managed Pressure Operations | Drilling system |
| CN102588699A (en) * | 2012-02-29 | 2012-07-18 | 北京中油联自动化技术开发有限公司 | Flow equalizer |
| CN102706397A (en) * | 2012-05-08 | 2012-10-03 | 东北电力科学研究院有限公司 | Water-flow measuring device with large diameter and low pressure head and measuring method |
-
1985
- 1985-04-01 CN CN85100330A patent/CN85100330B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85100330A (en) | 1987-01-17 |
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| CF01 | Termination of patent right due to non-payment of annual fee |