CN205981307U - Buret is surveyed to ring type vortex street - Google Patents

Buret is surveyed to ring type vortex street Download PDF

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Publication number
CN205981307U
CN205981307U CN201621048374.1U CN201621048374U CN205981307U CN 205981307 U CN205981307 U CN 205981307U CN 201621048374 U CN201621048374 U CN 201621048374U CN 205981307 U CN205981307 U CN 205981307U
Authority
CN
China
Prior art keywords
tube
vortex street
ring type
buret
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201621048374.1U
Other languages
Chinese (zh)
Inventor
白青松
王东
王彩
王子琦
王海明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHENGDE FISCHER-PORTER AUTOMATION EQUIPMENT Co Ltd
Original Assignee
CHENGDE FISCHER-PORTER AUTOMATION EQUIPMENT Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHENGDE FISCHER-PORTER AUTOMATION EQUIPMENT Co Ltd filed Critical CHENGDE FISCHER-PORTER AUTOMATION EQUIPMENT Co Ltd
Priority to CN201621048374.1U priority Critical patent/CN205981307U/en
Application granted granted Critical
Publication of CN205981307U publication Critical patent/CN205981307U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a buret is surveyed to ring type vortex street relates to the flow measurement technology field. Buret is surveyed to ring type vortex street includes inner tube and outer tube, the size of outer tube is measure -alike with the medium circulation pipe, the both ends of inner tube are sealed by the cambered surface, between inner tube and the outer tube through the vortex street body and support column connection take place, the entrance point that the body is close to the outer tube takes place for the vortex street, the support column is close to the exit end of outer tube. The utility model provides a buret is surveyed to ring type vortex street, through installing the inner tube in the outer tube, the medium circulation area has been reduced, thereby fluidic reynolds number (having improved the velocity of flow promptly) in outer tube and the interior pipe fitting annular flow siphunculus way has been improved, survey buret flow characteristic and measurement conditions have been improved, the low discharge that the makes original immeasurability measurable quantity that becomes, " low discharge has been solved, heavy -calibre unable measuring flow's in " problem, buret is surveyed to ring type vortex street has enlarged the range ability, outer tube and medium circulation pipe is measure -alike simultaneously, the fastening bracket simplifies installation, the mounting cost has been practiced thrift.

Description

A kind of ring type vortex street measurement pipe
Technical field
This utility model is related to flow measurement technology field, more particularly, to a kind of ring type vortex street measurement pipe.
Background technology
Vortex-shedding meter is to lay a bluff body (i.e. vortex shedder) in a fluid, so that fluid is existed Generating body both sides alternately separate, and discharge two strings regularly staggered vortex, and vortex separates frequency within the specific limits The effusion meter that rate is directly proportional to flow.Vortex-shedding meter is mainly used in the flow measurement of industrial pipeline medium fluid, such as gas, liquid The mediums such as body, steam, are characterized in that the pressure loss is little, and range ability is big, and high precision is several in Test Cycle volume flow It is not subject to that fluid density, pressure, temperature, viscosity are isoparametric to be affected.
According to the operation principle of vortex-shedding meter, only when in measurement pipe Reynolds number reach certain value (i.e. flow velocity reach one Definite value) when, Karman vortex street just can alternately be isolated in eddy generator both sides, and instrument can carry out signal detection, process, normal work Make.Generally, current limliting speed is 0.3-0.5m/s to measurement liquid at present, and current limliting speed is 3-5m/s at present to measure gas, but It is that much scene has the actual flow of fluid or the phenomenon that flow velocity is low in a large number, and its reason substantially has following several respects:One It is artificially to reduce flow velocity, so can reduce the pressure loss caused by flow of fluid, reduce and drive power, energy saving;Two It is the development that looks to the future, popularization, leave sufficient surplus in design, fluid line diameter design is larger.By In the presence of these " Large Diameter Pipeline low discharges " or " Large Diameter Pipeline low flow velocity " phenomenon, to the choosing of vortex-shedding meter uniform velocity formula effusion meter With bringing very big difficulty.
For meeting measurement requirement it is necessary to undergauge is carried out to site technique pipeline.But the draw is in the actual stream of effectively solving While measurement problem, also increase installation cost and workload.
Utility model content
The purpose of this utility model is to propose a kind of ring type vortex street measurement pipe, solves fluid in existing vortex street measurement pipe Actual flow or flow velocity low, instrument can not carry out signal detection, process problem.
For reaching this purpose, this utility model employs the following technical solutions:
A kind of ring type vortex street measurement pipe, including inner and outer tubes, the size phase of the size of described outer tube and medium circulation tube With the two ends of said inner tube are closed by cambered surface, pass through vortex shedder and support column connects between said inner tube and outer tube, described , near the entrance point of outer tube, described support column is near the port of export of outer tube for vortex shedder.
As a kind of preferred version of above-mentioned ring type vortex street measurement pipe, the axis of said inner tube and outer tube overlaps.
As a kind of preferred version of above-mentioned ring type vortex street measurement pipe, the two ends of described vortex shedder respectively with outer tube The outer wall welding of inwall and inner tube.
As a kind of preferred version of above-mentioned ring type vortex street measurement pipe, the two ends inwall with outer tube respectively of described support column And the outer wall welding of inner tube.
As a kind of preferred version of above-mentioned ring type vortex street measurement pipe, described support column is at least three, and along inner tube Circumference is uniformly distributed.
As a kind of preferred version of above-mentioned ring type vortex street measurement pipe, described outer tube is provided with signal detection component, uses In detection rate-of flow.
The beneficial effects of the utility model:
The utility model proposes ring type vortex street measurement pipe, by outer tube install inner tube, reduce flow of media area, Thus improve the Reynolds number (improve flow velocity) of outer tube and fluid in interior pipe fitting annular flow pipeline, improve measurement pipe flow Flow characteristic and measuring condition, make immeasurable low discharge originally become to measure, and solving cannot in " low discharge, heavy caliber " The problem of measurement flow, ring type vortex street measurement pipe expands range ability, simultaneously equivalently-sized, the letter of outer tube and medium circulation tube Change installation, save mounting cost.
Brief description
Fig. 1 is the structural representation of the ring type vortex street measurement pipe that this utility model specific embodiment provides;
Fig. 2 is A direction view in Fig. 1.
Wherein, 1, inner tube;2nd, outer tube;3rd, vortex shedder;4th, support column;5th, signal detection component.
Specific embodiment
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by specific embodiment.
Present embodiment protects a kind of ring type vortex street measurement pipe, including inner tube 1 and outer tube 2, the size of outer tube 2 and medium flow field Siphunculus equivalently-sized, the two ends of inner tube 1 are closed by cambered surface, between inner tube 1 and outer tube 2 pass through vortex shedder 3 and support column 4 Connect, near the entrance point of outer tube 2, support column 4 is near the port of export of outer tube 2 for vortex shedder 3.
This ring type vortex street measurement pipe, installs inner tube 1 by outer tube 2, reduces flow of media area, thus improve outer Pipe 2 and the Reynolds number (improve flow velocity) of fluid in 1 annular flow pipeline of inner tube, improve measurement pipe discharge characteristic and survey Amount condition, makes immeasurable low discharge originally become to measure, solves in " low discharge, heavy caliber " and cannot measure flow Problem, ring type vortex street measurement pipe expands range ability, and outer tube 2 and medium circulation tube is equivalently-sized simultaneously, simplifies installation, Save mounting cost.
The axis of inner tube 1 and outer tube 2 overlaps so that overall structure is symmetrical, improves flow field, makes rate of flow of fluid more equal Even, stable.
The two ends of vortex shedder 3 are welded with the inwall of outer tube 2 and the outer wall of inner tube 1 respectively, play generation Karman vortex Street acts on, and plays the effect supporting and fixing inner tube 1 simultaneously again.
The two ends of support column 4 are welded with the inwall of outer tube 2 and the outer wall of inner tube 1 respectively.Specifically, support column 4 is at least For three, and the circumference along inner tube 1 is uniformly distributed.Support column 4 plays the effect supporting inner tube 1, simultaneously works as the effect of current stabilization.
Signal detection component 5 is provided with outer tube 2, for detecting rate-of flow.
Note, above are only preferred embodiment of the present utility model.It will be appreciated by those skilled in the art that this utility model is not It is limited to specific embodiment described here, various obvious changes can be carried out for a person skilled in the art, readjust With replacement without departing from protection domain of the present utility model.Therefore although being carried out to this utility model by above example It is described in further detail, but this utility model is not limited only to above example, conceive without departing from this utility model In the case of, other Equivalent embodiments more can also be included, and scope of the present utility model is determined by scope of the appended claims Fixed.

Claims (6)

1. a kind of ring type vortex street measurement pipe is it is characterised in that include inner tube (1) and outer tube (2), the size of described outer tube (2) and Medium circulation tube equivalently-sized, the two ends of said inner tube (1) are closed by cambered surface, pass through between said inner tube (1) and outer tube (2) Vortex shedder (3) and support column (4) connect, and described vortex shedder (3) is near the entrance point of outer tube (2), described support column (4) near the port of export of outer tube (2).
2. ring type vortex street measurement pipe according to claim 1 is it is characterised in that the axis of said inner tube (1) and outer tube (2) Overlap.
3. ring type vortex street measurement pipe according to claim 1 is it is characterised in that the two ends of described vortex shedder (3) are divided Not do not weld with the inwall of outer tube (2) and the outer wall of inner tube (1).
4. ring type vortex street measurement pipe according to claim 1 it is characterised in that described support column (4) two ends respectively with The outer wall welding of the inwall of outer tube (2) and inner tube (1).
5. the ring type vortex street measurement pipe according to claim 1 or 4 is it is characterised in that described support column (4) is at least three Individual, and the circumference along inner tube (1) is uniformly distributed.
6. ring type vortex street measurement pipe according to claim 1 is it is characterised in that be provided with signal inspection on described outer tube (2) Survey element (5), for detecting rate-of flow.
CN201621048374.1U 2016-09-09 2016-09-09 Buret is surveyed to ring type vortex street Expired - Fee Related CN205981307U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621048374.1U CN205981307U (en) 2016-09-09 2016-09-09 Buret is surveyed to ring type vortex street

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621048374.1U CN205981307U (en) 2016-09-09 2016-09-09 Buret is surveyed to ring type vortex street

Publications (1)

Publication Number Publication Date
CN205981307U true CN205981307U (en) 2017-02-22

Family

ID=58040491

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201621048374.1U Expired - Fee Related CN205981307U (en) 2016-09-09 2016-09-09 Buret is surveyed to ring type vortex street

Country Status (1)

Country Link
CN (1) CN205981307U (en)

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Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170222

Termination date: 20170909

CF01 Termination of patent right due to non-payment of annual fee