CN2669141Y - Pipe-measuring type flowmeter - Google Patents
Pipe-measuring type flowmeter Download PDFInfo
- Publication number
- CN2669141Y CN2669141Y CNU2004200006387U CN200420000638U CN2669141Y CN 2669141 Y CN2669141 Y CN 2669141Y CN U2004200006387 U CNU2004200006387 U CN U2004200006387U CN 200420000638 U CN200420000638 U CN 200420000638U CN 2669141 Y CN2669141 Y CN 2669141Y
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- CN
- China
- Prior art keywords
- measuring tube
- pipe
- tubular type
- total head
- survey
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- 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 - Lifetime
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Abstract
The utility model discloses a pipe-measuring type flowmeter, including a measuring pipe which is a straight circular pipe. The inner wall at one side of the incident flow of the measuring pipe is fixed a total-pressure leading pressure pipe whose external diameter is smaller than the internal diameter of the measuring pipe; the front end of the total-pressure leading pressure pipe extends out the measuring pipe and the end-face of the nozzle at the end of the total-pressure leading pressure pipe is vertical with the axial line of the measuring pipe, forming a total-pressure taking pressure port with incident flow; adequate clearance is provided between the external wall of the total-pressure leading pressure pipe and the internal wall of the measuring pipe and a static-pressure taking pressure port at the front of the measuring pipe is communicated with the clearance. The pipe-measuring type flowmeter has the advantages of simple structure, low cost, inaccessible blockage pressure port, long busy period, small resistance, accessible installment and disassembly with pressure, and convenient use and maintenance.
Description
Technical field
The utility model belongs to the flow measurement field, relates in particular to a kind of survey tubular type flowmeter that pipeline flow is measured that is used for.
Background technology
At present both at home and abroad to the large diameter pipeline flow measurement, for example to the flow measurement ubiquity of blast furnace gas, coal gas of converter, coke-oven gas, producer gas, flue gas and steam etc.: 1. there is not standard support.As restriction device, GB GB/T2624-93 only supports D≤1000mm to orifice plate, and the ISA1932 nozzle is only supported D≤500mm, and the classical venturi tube with thick soldering iron plate contraction section is only supported D≤1200mm.Wherein D refers to the upstream line internal diameter, exceeds this scope and all belongs to nonstandard.2. adopt throttling device such as orifice plate to carry out flow measurement, the pressure loss is big, increases to carry cost.3. complex structure, the price height.4. install/difficult in maintenance.Must construct by cutout/gas when the flowmeter of present most forms is installed, block pipeline, welding flange refills instrument.Also must stop when instrument is safeguarded/gas dismounting, surpass the calibration interval and scrap because of the pipeline inconvenience dismounting that can not stop as many heavy caliber orifice plates.5. dirty medium stops up pressure port in the pipeline, and influence is normally measured.
The utility model content
For addressing the above problem, the purpose of this utility model is to provide a kind of that standard support, the pressure loss are little, simple in structure, low price and be applicable to the survey tubular type flowmeter of dirty medium.
Another purpose of the present utility model also is to provide a kind of can carry out the survey tubular type flowmeter that gas (steam, nitrogen, pressurized air etc.) purges to pressure port under the pipeline running status.
The 3rd purpose of the present utility model is to provide a kind of survey tubular type flowmeter, and this flowmeter can be with under existing pipeline running status and press punching, insert and install, dismounting and easy for installation.
For reaching first purpose of the present utility model, the following technical scheme of the new employing of this practicality: survey the tubular type flowmeter and comprise a measuring tube, measuring tube is a straight pipe, the inwall that measuring tube is met stream one side is fixed with the total head pressure guiding pipe of an external diameter less than the measuring tube internal diameter, total head pressure guiding pipe front end stretches out measuring tube, the mouth of pipe end face of total head pressure guiding pipe end and measuring tube axis normal form the total head pressure port of meeting stream; Between total head pressure guiding pipe outer wall and the measuring tube inwall enough gaps should be arranged, the static pressure tapping of measuring tube front end communicates with described gap.
The total head pressure port of meeting stream of described total head pressure guiding pipe front end can adopt following frame mode: total head pressure guiding pipe front end has river bend curved and an otch, its otch end face and measuring tube axis normal form the total head pressure port of meeting stream, and total head pressure guiding pipe front end radially is no more than the outer wall surface of measuring tube; Perhaps total head pressure guiding pipe front end is shut, and meets flow path direction at total head pressure guiding pipe outer wall and has through hole formation total head pressure port.
Static pressure tapping on the described measuring tube can adopt following frame mode: static pressure tapping is the axial mouth of pipe of the straight pipe front end of measuring tube; Perhaps described measuring tube front end is shut, and its outer wall is met stream and had through hole formation static pressure tapping in the other direction.
In order to regulate the insertion depth of measuring tube in pipeline easily, survey tubular type flowmeter of the present utility model also can comprise a measuring tube jacking gear, and jacking gear comprises: the lifting external thread on the described measuring tube back segment, lifting nut, setscrew nut and outer tube are formed.Outer tube is enclosed within on the described measuring tube, and setscrew nut is screwed on the lifting external thread of measuring tube back segment, and the lifting nut nut that is positioned is positioned on the described outer tube rear end face, turns lifting nut and can adjust the degree of depth that measuring tube inserts measuring channel.
In order to prevent take place to insert the measuring error that the variation of the degree of depth of measuring channel and direction causes because of vibrations, can also be screwed with a lifting set nut on the lifting external thread of above-mentioned measuring tube back segment, the lifting set nut compresses lifting nut can prevent that lifting nut from rotating.
In order to realize second purpose of the present utility model, survey tubular type flowmeter of the present utility model can also comprise a blow device.
Blow device can adopt following technical scheme: blow device is made of two three-way pipes, first mouth of pipe of one of them three-way pipe is communicated with described total head pressure guiding pipe, first mouth of pipe of another three-way pipe is communicated with described measuring tube, and two mouths of pipe in addition of two three-way pipes can connect differential pressure transmitter and purge gas by valve respectively.
Described blow device also can adopt following technical scheme: blow device is that a differential pressure with the measuring tube tail end is exported the purging transition section that seat is fixed together; Purge on the transition section and have two group of three access hole, every group three access hole inside communicates; First stomidium in three access holes communicates with measuring tube tail end differential pressure output seat differential pressure output stomidium, and second stomidium connects differential pressure transmitter by valve, and the 3rd stomidium connects purge gas by valve.
In order to realize the 3rd purpose of the present utility model, survey tubular type flowmeter of the present utility model can also comprise that the band pressure is installed, stripping assembly, this band is pressed and is installed, stripping assembly comprises a ball valve and be installed in the ball valve mounting seat and the band gland sealed measuring tube sealing socket at ball valve two ends, and the measuring tube sealing socket is connected with above-mentioned outer tube front end.
A measuring tube that this survey tubular type flowmeter is made of a straight tube and a total head pressure guiding pipe in the measuring tube constitute the pressure end, as long as on pipeline, make a call to a circular hole measuring tube is inserted in the pipeline during installation, easy for installation, press installation, stripping assembly to install and to dismantle pipe pressurized easily by band, convenient for installation and maintenance.Can be adjusted at insertion depth in the pipeline easily and accurately by jacking gear.The total head of measuring tube, static pressure pressure pipe are no media flow in continuous pipe and the pipe, dirtyly can not enter in the pressure port; Total head pressure guiding pipe measuring head fluoran stream surface is long-pending little, has also reduced dirty accumulation at the pressure port place, has anti-blocking performance preferably.If when dirty obstruction total head pressure port or static pressure tapping are arranged, can purge measuring tube with gases such as nitrogen, make its assurance unimpeded, to prolong its life cycle by blow device.In addition, this survey tubular type flowmeter also has simple in structure, the advantage that cost is low, and the resistance that the pipeline inner fluid is flowed is very little.
Description of drawings
Fig. 1 is the structural representation of survey tubular type flowmeter of the present utility model.
Among the figure: 1. total head pressure port
2. static pressure tapping
3. total head pressure guiding pipe
4. the double measuring tube of doing the static pressure pressure guiding pipe
5. duct wall
6. ball valve mounting seat
7. ball valve
8. measuring tube sealing socket
9. sealed packing
10. up and down screw
11. outer tube
12. lifting setscrew nut
13. lifting nut
14. lifting set nut
15. differential pressure output seat
16. sealing gasket
17.18. purge gas valve
19. pressure/purging transition section
20.21. measurement valve
Connect differential pressure transmitter
Embodiment
Below in conjunction with the drawings and specific embodiments survey tubular type flow of the present utility model is described further, to help understanding content of the present utility model.
As shown in Figure 1, survey the tubular type flowmeter and comprise a double measuring tube 4 of doing the static pressure pressure guiding pipe, measuring tube 4 is a straight tube.Be welded with a total head pressure guiding pipe 3 in the measuring tube 4, total head pressure guiding pipe 3 front ends stretch out the measuring tube 4 front end mouths of pipe.The part that total head pressure guiding pipe 3 front ends stretch out the measuring tube 4 front end mouths of pipe has river bend curved and an otch, and otch end face and measuring tube axis normal form the total head pressure port 1 of meeting stream; And total head pressure guiding pipe 3 front ends radially are no more than the outer wall surface of measuring tube 4, so that the measuring tube after the assembling can insert measuring channel by ball valve 7 easily.Gapped formation static pressure pressure guiding pipe between total head pressure guiding pipe 3 outer walls and measuring tube 4 inwalls.The measuring tube 4 leading section mouths of pipe are static pressure tapping 2.Consistent up and down screw 10 front ends of measuring tube 4 tail ends and internal diameter hollow with and measuring tube 4 internal diameters are welded as a whole, and the gap between up and down screw 10 hollow inwalls and total head pressure guiding pipe 3 outer walls also is the static pressure pressure guiding pipe of the measuring tube of welding one.Lifting spiral shell 10 outside surfaces have external thread to form the rising-falling tone sections of assembling back measuring tube.Lifting spiral shell 10 tail ends and 15 welding of a differential pressure output seat.In the differential pressure output seat 15 two through holes are arranged, total head pressure guiding pipe 3 tail ends are inserted in the through hole being welded in differential pressure output seat 15, and the static pressure pressure guiding pipe of the gap formation between another through hole of differential pressure output seat 15 and up and down screw 10 hollow inwalls and total head pressure guiding pipe 3 outer walls communicates.Differential pressure output seat 15 also is connected with a pressure/purging transition section 19 by four bolts (accompanying drawing 1 part omitted).Pressure purges two group of three access hole that has on the transition section 19, and every group three access hole inside communicates; First stomidium in three access holes communicates with the differential pressure output stomidium of measuring tube tail end differential pressure output seat 15, and second stomidium is by valve 20,21 and conduit
Connect differential pressure transmitter, the 3rd stomidium is by valve 17,18 and conduit
Connect purge gas (steam, pressurized air, nitrogen etc.).
Outside lifting spiral shell 10, be with an outer tube 11, outer tube 11 tail ends are equipped with a tapped lifting nut 13 by a lifting setscrew nut 12, up and down screw 10 is screwed in the lifting nut 13, other has a lifting set nut 14 that is screwed on the up and down screw 10 and is positioned at lifting nut 13 tail ends one side, has constituted a measuring tube jacking gear (outer tube 11 is again the part of insertion/seal assembly simultaneously).Turn lifting nut 13 with open-ended spanner and can adjust the degree of depth that measuring tube inserts measuring channel; Tighten lifting set nut 14 clockwise, measuring tube can be locked on the jacking gear, prevent that measuring tube from because of measuring channel vibration the measuring error that the variation of the degree of depth of measuring channel and direction causes taking place to insert.
Outer tube 11, measuring tube sealing socket 8, sealed packing 9 (comprising sealing differential, sealing collet that sealed packing 9 is supporting), ball valve 7, ball valve mounting seat 6 have constituted insertion/seal assembly of surveying the tubular type flowmeter.
Measuring tube 4 parts are with measuring tube sealing socket 8, and measuring tube sealing socket 8 is connected with outer tube 11 front ends by screw thread, in the measuring tube sealing socket 8 with measuring tube 4 external diameters between the gap sealed packing 9 is housed, sealed packing 9 is supporting the sealing differential, seal collet.Tighten the outer tube 11 that is threaded on the measuring tube sealing socket 8 clockwise, can compress sealed packing 9 by outer tube 11, sealing differential; Both guaranteed sealing, measuring tube 4 can be rotated to adjust meeting flow path direction and adjusting the insertion depth of total head pressure port 1 along axis of its total head pressure port 1 around axis medium in the measuring channel.
On measuring channel, install when surveying the tubular type flowmeter, at first ball valve mounting seat 6 is welded on the duct wall 5 of measuring channel, ball valve 7 is screwed on the ball valve mounting seat 6, special-purpose online card punch is installed on ball valve 7, opening ball valve 7 makes special-purpose online card punch drill bit make a call to a mounting hole by ball valve 7 on the duct wall 5 of measuring channel, extract special-purpose online card punch drill bit then out, close ball valve 7, pull down special-purpose online card punch.Adjusting lifting nut 13 contracts to measuring tube sealing socket 8 front end chambers measuring tube 4 and total head pressure guiding pipe 3 ends, the measuring tube sealing socket 8 that the measuring tube assembly is housed is installed on the ball valve 7, open ball valve 7 once more, turning lifting nut 13 makes measuring tube 4 and total head pressure guiding pipe 3 front ends insert in the measuring channel by ball valve 7, be inserted into total head pressure port 1 that the degree of depth adjusts the back to the right place and make total head pressure guiding pipe 3 for meeting flow path direction, tighten lifting set nut 14 to prevent to cause the skew of measurement point position and direction, so far finish and survey the tubular type flowmeter in the installation of tape pressure because of pipe vibration.
When the tubular type flowmeter is surveyed in dismounting, unclamp lifting set nut 14 earlier, oppositely turn lifting nut 13 measuring tube 4 and total head pressure guiding pipe 3 front ends are contracted to measuring tube sealing socket 8 front end chambers, close ball valve 7, turn the measuring tube sealing socket 8 that measuring tube sealing socket 8 will be equipped with the measuring tube assembly and pull down; Dismounting back ball valve 7 and ball valve mounting seat 6 are stayed on the measuring channel all the time.
Purge gas valve 17,18 is closed in the survey tubular type flowmeter metering process, measures valve 20,21 and opens; When surveying tubular type flowmeter total head pressure port 1 or static pressure tapping 2 generation obstructions, can carry out gas purging to it; Program is: close the measurement valve 20,21 that leads to differential pressure transmitter, steam, nitrogen or the air of opening purge gas valve 17,18 use high pressure respectively will stop up the dirty measuring channel that is blown into of total head pressure port 1 or static pressure tapping 2, finish shut-down purge gas valve 17,18 after the pressure port mediation obstruction process, open and measure valve 20,21.
Claims (10)
1, a kind of survey tubular type flowmeter is characterized in that: survey the tubular type flowmeter and comprise a measuring tube, measuring tube is a straight pipe; The inwall that measuring tube is met stream one side is fixed with the total head pressure guiding pipe of an external diameter less than the measuring tube internal diameter, and total head pressure guiding pipe front end stretches out measuring tube, and the mouth of pipe end face of total head pressure guiding pipe end and measuring tube axis normal form the total head pressure port of meeting stream; Between total head pressure guiding pipe outer wall and the measuring tube inwall enough gaps should be arranged, the static pressure tapping of measuring tube front end communicates with described gap.
2, survey tubular type flowmeter as claimed in claim 1, it is characterized in that: described total head pressure guiding pipe front end has river bend curved and an otch, its otch end face and measuring tube axis normal form the total head pressure port of meeting stream, and total head pressure guiding pipe front end radially is no more than the outer wall surface of measuring tube.
3, survey tubular type flowmeter as claimed in claim 1 is characterized in that: described total head pressure guiding pipe front end is shut, and meets flow path direction at total head pressure guiding pipe outer wall and has through hole formation total head pressure port.
4, survey tubular type flowmeter as claimed in claim 1 is characterized in that: the static pressure tapping on the described measuring tube is the axial mouth of pipe of the straight pipe front end of measuring tube.
5, survey tubular type flowmeter as claimed in claim 1 is characterized in that: the straight pipe front end of the described measuring tube mouth of pipe is shut, and its outer wall is met stream perforate in the other direction, forms static pressure tapping.
6, survey tubular type flowmeter as claimed in claim 1 is characterized in that, also comprises a measuring tube jacking gear, and jacking gear comprises: the lifting external thread on the described measuring tube back segment, lifting nut, setscrew nut and outer tube are formed; Outer tube is enclosed within on the described measuring tube, and setscrew nut is screwed on the lifting external thread of measuring tube back segment, and the lifting nut nut that is positioned is positioned on the described outer tube rear end face.
7, survey tubular type flowmeter as claimed in claim 6 is characterized in that: also be screwed with a lifting set nut on the lifting external thread of above-mentioned measuring tube back segment.
8, as claim 1 or 6 described survey tubular type flowmeters, it is characterized in that: survey the tubular type flowmeter and also comprise a blow device, blow device is made of two three-way pipes; First mouth of pipe of one of them three-way pipe is communicated with described total head pressure guiding pipe, and first mouth of pipe of another three-way pipe is communicated with described measuring tube, and two mouths of pipe in addition of two three-way pipes can connect differential pressure transmitter and purge gas by valve respectively.
9, as claim 1 or 6 described survey tubular type flowmeters, it is characterized in that: survey the tubular type flowmeter and also comprise a blow device, blow device is that a differential pressure with the measuring tube tail end is exported the purging transition section that seat is fixed together; Purge on the transition section and have two group of three access hole, every group three access hole inside communicates; First stomidium in three access holes communicates with measuring tube tail end differential pressure output seat differential pressure output stomidium, and second stomidium connects differential pressure transmitter by valve, and the 3rd stomidium connects purge gas by valve.
10, as claim 1 or 6 described survey tubular type flowmeters, it is characterized in that: survey the tubular type flowmeter and comprise that also the band pressure is installed, stripping assembly, this device comprises a ball valve and is installed in the ball valve mounting seat and the band gland sealed measuring tube sealing socket at ball valve two ends, and the measuring tube sealing socket is connected with above-mentioned outer tube front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200006387U CN2669141Y (en) | 2004-01-14 | 2004-01-14 | Pipe-measuring type flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200006387U CN2669141Y (en) | 2004-01-14 | 2004-01-14 | Pipe-measuring type flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2669141Y true CN2669141Y (en) | 2005-01-05 |
Family
ID=34441339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200006387U Expired - Lifetime CN2669141Y (en) | 2004-01-14 | 2004-01-14 | Pipe-measuring type flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2669141Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954855A (en) * | 2011-08-30 | 2013-03-06 | 南京梅山冶金发展有限公司 | Pressure leading device for gas pressure detection device of annular sleeve kiln |
| CN103017835A (en) * | 2012-11-26 | 2013-04-03 | 中国原子能科学研究院 | Parallel narrow-slit rectangular multi-flow-passage flow distribution measuring instrument |
| CN103542896A (en) * | 2013-11-07 | 2014-01-29 | 江苏华尔威科技有限公司 | Large diameter gas measuring meter |
| CN105606167A (en) * | 2015-10-16 | 2016-05-25 | 辽宁毕托巴科技有限公司 | Plug-in Pitot flow sensor |
| CN111198015A (en) * | 2018-11-19 | 2020-05-26 | 中冶宝钢技术服务有限公司 | Pipeline gas flow measuring device |
| CN111810222A (en) * | 2020-06-12 | 2020-10-23 | 煤科集团沈阳研究院有限公司 | Method for measuring gas extraction parameters based on pitot tube |
-
2004
- 2004-01-14 CN CNU2004200006387U patent/CN2669141Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954855A (en) * | 2011-08-30 | 2013-03-06 | 南京梅山冶金发展有限公司 | Pressure leading device for gas pressure detection device of annular sleeve kiln |
| CN103017835A (en) * | 2012-11-26 | 2013-04-03 | 中国原子能科学研究院 | Parallel narrow-slit rectangular multi-flow-passage flow distribution measuring instrument |
| CN103542896A (en) * | 2013-11-07 | 2014-01-29 | 江苏华尔威科技有限公司 | Large diameter gas measuring meter |
| CN105606167A (en) * | 2015-10-16 | 2016-05-25 | 辽宁毕托巴科技有限公司 | Plug-in Pitot flow sensor |
| CN111198015A (en) * | 2018-11-19 | 2020-05-26 | 中冶宝钢技术服务有限公司 | Pipeline gas flow measuring device |
| CN111810222A (en) * | 2020-06-12 | 2020-10-23 | 煤科集团沈阳研究院有限公司 | Method for measuring gas extraction parameters based on pitot tube |
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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 |
Expiration termination date: 20140114 Granted publication date: 20050105 |