CN104807509A - Differential pressure type flow measuring device capable of improving LPG flow measurement accuracy - Google Patents
Differential pressure type flow measuring device capable of improving LPG flow measurement accuracy Download PDFInfo
- Publication number
- CN104807509A CN104807509A CN201410038244.9A CN201410038244A CN104807509A CN 104807509 A CN104807509 A CN 104807509A CN 201410038244 A CN201410038244 A CN 201410038244A CN 104807509 A CN104807509 A CN 104807509A
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- Prior art keywords
- differential
- lpg
- pressure
- flow
- connecting pipe
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- ATUOYWHBWRKTHZ-UHFFFAOYSA-N propane Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000005259 measurement Methods 0.000 title claims abstract description 31
- 230000001702 transmitter Effects 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Chemical compound data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0nMS4wJyBlbmNvZGluZz0naXNvLTg4NTktMSc/Pgo8c3ZnIHZlcnNpb249JzEuMScgYmFzZVByb2ZpbGU9J2Z1bGwnCiAgICAgICAgICAgICAgeG1sbnM9J2h0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnJwogICAgICAgICAgICAgICAgICAgICAgeG1sbnM6cmRraXQ9J2h0dHA6Ly93d3cucmRraXQub3JnL3htbCcKICAgICAgICAgICAgICAgICAgICAgIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJwogICAgICAgICAgICAgICAgICB4bWw6c3BhY2U9J3ByZXNlcnZlJwp3aWR0aD0nMzAwcHgnIGhlaWdodD0nMzAwcHgnIHZpZXdCb3g9JzAgMCAzMDAgMzAwJz4KPCEtLSBFTkQgT0YgSEVBREVSIC0tPgo8cmVjdCBzdHlsZT0nb3BhY2l0eToxLjA7ZmlsbDojRkZGRkZGO3N0cm9rZTpub25lJyB3aWR0aD0nMzAwLjAnIGhlaWdodD0nMzAwLjAnIHg9JzAuMCcgeT0nMC4wJz4gPC9yZWN0Pgo8cGF0aCBjbGFzcz0nYm9uZC0wIGF0b20tMCBhdG9tLTEnIGQ9J00gMTc3LjAsMTUwLjAgTCAxMDMuOCwxNTAuMCcgc3R5bGU9J2ZpbGw6bm9uZTtmaWxsLXJ1bGU6ZXZlbm9kZDtzdHJva2U6I0U4NDIzNTtzdHJva2Utd2lkdGg6Mi4wcHg7c3Ryb2tlLWxpbmVjYXA6YnV0dDtzdHJva2UtbGluZWpvaW46bWl0ZXI7c3Ryb2tlLW9wYWNpdHk6MScgLz4KPHBhdGggY2xhc3M9J2JvbmQtMCBhdG9tLTAgYXRvbS0xJyBkPSdNIDEwMy44LDE1MC4wIEwgMzAuNSwxNTAuMCcgc3R5bGU9J2ZpbGw6bm9uZTtmaWxsLXJ1bGU6ZXZlbm9kZDtzdHJva2U6IzNCNDE0MztzdHJva2Utd2lkdGg6Mi4wcHg7c3Ryb2tlLWxpbmVjYXA6YnV0dDtzdHJva2UtbGluZWpvaW46bWl0ZXI7c3Ryb2tlLW9wYWNpdHk6MScgLz4KPHRleHQgeD0nMjIzLjEnIHk9JzE3MC4wJyBjbGFzcz0nYXRvbS0wJyBzdHlsZT0nZm9udC1zaXplOjQwcHg7Zm9udC1zdHlsZTpub3JtYWw7Zm9udC13ZWlnaHQ6bm9ybWFsO2ZpbGwtb3BhY2l0eToxO3N0cm9rZTpub25lO2ZvbnQtZmFtaWx5OnNhbnMtc2VyaWY7dGV4dC1hbmNob3I6c3RhcnQ7ZmlsbDojRTg0MjM1JyA+TzwvdGV4dD4KPHRleHQgeD0nMjUwLjcnIHk9JzE3MC4wJyBjbGFzcz0nYXRvbS0wJyBzdHlsZT0nZm9udC1zaXplOjQwcHg7Zm9udC1zdHlsZTpub3JtYWw7Zm9udC13ZWlnaHQ6bm9ybWFsO2ZpbGwtb3BhY2l0eToxO3N0cm9rZTpub25lO2ZvbnQtZmFtaWx5OnNhbnMtc2VyaWY7dGV4dC1hbmNob3I6c3RhcnQ7ZmlsbDojRTg0MjM1JyA+SDwvdGV4dD4KPC9zdmc+Cg== data:image/svg+xml;base64,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 OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000002309 gasification Methods 0.000 abstract description 6
- 239000003915 liquefied petroleum gas Substances 0.000 description 38
- 239000012530 fluid Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003068 static Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention relates to a differential pressure type flow measuring device capable of improving LPG flow measurement accuracy. The differential pressure type flow measuring device comprises an LPG flow pipeline, a differential-pressure perforated plate, pressure guide pipes and a differential-pressure flow transmitter; the differential-pressure perforated plate is arranged in the LPG flow pipeline; two pressure guide pipes are arranged, and the two ends of each pressure guide pipe are communicated with the LPG flow pipeline and the differential-pressure flow transmitter; a hand valve is arranged on the pressure guide pipe; a pressure guide branch pipe is arranged on the guide pressure pipe between the hand valve and the differential-pressure flow transmitter by use of a three-way joint, and a plug is connected to the end portion of the pressure guide branch pipe; the pressure guide branch pipe and the pressure guide pipe between the hand valve and the differential-pressure flow transmitter are fully filled with an LPG heavy density liquid. Compared with the prior art, the differential pressure type flow measuring device is the simple in structure and low in cost, capable of eliminating the influence of the LPG gasification to flow measurement, and convenient to use, and can be applied to liquid flow measurement in other similar fields; the use range of the differential pressure type flow measuring device is wide.
Description
Technical field
The present invention relates to a kind of differential flow measurement device, especially relate to a kind of differential flow measurement device improving LPG flow measurement accuracy.
Background technology
LPG (liquefied petroleum gas (LPG)), than being easier to liquefaction, at normal temperatures and pressures in gaseous state, be easy to change liquid state into from gaseous state, and the LPG generally used at chemical enterprise is liquid form conveying under normal temperature pressurization or atmospheric low-temperature.When using differential pressure flowmeter to measure LPG flow, LPG is drawn from the house steward of flowing, and connecting pipe is comparatively thin, the LPG of extraction is again static, is easy to influenced by ambient temperature and occurs gasification, thus when causing measuring flow because of gasification flowmeter inaccurate.
Chinese patent CN100425954 discloses a kind of orifice throttle differential pressure type flow measurement method and flow measurement device of low pressure loss wide-range ratio.The method comprises: respectively by connecting pipe, the fluid pressure signal chewed with low pressure end pressure survey is chewed in high-pressure side pressure survey and be passed to differential pressure pickup; By differential pressure pickup detected pressures difference signal; Pressure difference signal is passed to extracting operation transmitter or intelligent controller or computing machine by differential pressure pickup, and obtains flow values by the pressure difference signal received.This apparatus structure is comparatively complicated, and cost is higher, does not have broad applicability.
Summary of the invention
Object of the present invention is exactly provide a kind of structure simply to improve the differential flow measurement device of LPG flow measurement accuracy to overcome defect that above-mentioned prior art exists, and this device can eliminate the problem causing flow measurement inaccurate because LPG easily gasifies.
Object of the present invention can be achieved through the following technical solutions:
A kind of differential flow measurement device improving LPG flow measurement accuracy, comprise LPG flow conduit, differential pressure orifice plate, connecting pipe and differential flow transmitter, described differential pressure orifice plate is located in LPG flow conduit, described connecting pipe is provided with two, the two ends of connecting pipe are communicated with LPG flow conduit and differential flow transmitter respectively, described connecting pipe is provided with hand valve, connecting pipe between hand valve with differential flow transmitter is connected pilot arm by threeway, the upper end of this pilot arm connects plug, inner and between hand valve and differential flow transmitter the connecting pipe inside of pilot arm is full of the liquid heavier than LPG density.
One end of one of them connecting pipe is communicated with the LPG flow conduit of differential pressure orifice plate side, the other end is communicated with the plemum of differential flow transmitter, one end of another connecting pipe is communicated with the LPG flow conduit of differential pressure orifice plate opposite side, and the other end is communicated with the negative pressure chamber of differential flow transmitter.
The liquid heavier than LPG density is selected from water or methyl alcohol.
The caliber size of described pilot arm is identical with connecting pipe.
Density heavier fluid is all full of due to from pilot arm to differential flow transmitter, LPG can not enter connecting pipe because density is light, such LPG gasification also can not occur in connecting pipe, therefore can eliminate the problem causing flow measurement inaccurate because LPG easily gasifies.
When using device of the present invention, carry out flow measurement by following steps:
(1) the plemum valve on differential flow transmitter, negative pressure chamber's valve and equalizing valve is opened;
(2) open the plug that two pilots prop up tube end, from a pilot props up the plug of tube end, fill with the liquid (as water or methyl alcohol) heavier than LPG, until the plug place that another root pilot props up tube end emerges by filling liquid;
(3) the plemum valve on shut off differential pressure formula flow transmitter, negative pressure chamber's valve and equalizing valve;
(4) plug is blocked;
(5) open hand valve, differential flow transmitter comes into operation.
Compared with prior art, structure of the present invention is simple, with low cost, can eliminate the impact of LPG gasification on flow measurement, and easy to use, and can apply and carry out liquid flow measurement with other similar field, usable range is wide.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, 1 is LPG flow conduit, and 2 is plug, and 3 is pilot arm, and 4 is connecting pipe, and 5 is differential flow transmitter, and 6 is hand valve, and 7 is differential pressure orifice plate.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of differential flow measurement device improving LPG flow measurement accuracy, as shown in Figure 1, comprise LPG flow conduit 1, differential pressure orifice plate 7, connecting pipe 4 and differential flow transmitter 5, differential pressure orifice plate 7 is located in LPG flow conduit 1, connecting pipe 4 is provided with two, the two ends of connecting pipe are communicated with LPG flow conduit 1 and differential flow transmitter 5 respectively, connecting pipe 4 is provided with hand valve 6, connecting pipe 4 between hand valve 6 with differential flow transmitter 5 is connected pilot arm 3 by threeway, the upper end of this pilot arm 3 connects plug 2, inner and between hand valve 6 and differential flow transmitter 5 connecting pipe 4 inside of pilot arm 3 is full of the liquid heavier than LPG density.One end of one of them connecting pipe 4 is communicated with the LPG flow conduit 1 of differential pressure orifice plate 7 side, the other end is communicated with the plemum of differential flow transmitter 5, one end of another connecting pipe 4 is communicated with the LPG flow conduit 1 of differential pressure orifice plate 7 opposite side, and the other end is communicated with the negative pressure chamber of differential flow transmitter 5.The caliber size of pilot arm 3 is identical with connecting pipe 4.
LPG density ratio water is light, and proportion is about the half of water, and density is about 0.5-0.6g/cm
3between, it is 1.0g/cm that the liquid heavier than LPG density is selected from water-mass density
3or methanol density is 0.7914g/cm
3.
Owing to being all full of density heavier fluid from pilot arm 3 to differential flow transmitter 5, LPG can not enter connecting pipe 4 because density is light, such LPG gasification also can not occur in connecting pipe 4, therefore can eliminate the problem causing flow measurement inaccurate because LPG easily gasifies.
When using device of the present invention, carry out flow measurement by following steps:
(1) the plemum valve on differential flow transmitter, negative pressure chamber's valve and equalizing valve is opened;
(2) open the plug that two pilots prop up tube end, from a pilot props up the plug of tube end, fill with the liquid (as water or methyl alcohol) heavier than LPG, until the plug place that another root pilot props up tube end emerges by filling liquid;
(3) the plemum valve on shut off differential pressure formula flow transmitter, negative pressure chamber's valve and equalizing valve;
(4) plug is blocked;
(5) open hand valve, differential flow transmitter comes into operation.
Claims (4)
1. one kind is improved the differential flow measurement device of LPG flow measurement accuracy, comprise LPG flow conduit (1), differential pressure orifice plate (7), connecting pipe (4) and differential flow transmitter (5), described differential pressure orifice plate (7) is located in LPG flow conduit (1), described connecting pipe (4) is provided with two, the two ends of connecting pipe are communicated with LPG flow conduit (1) and differential flow transmitter (5) respectively, described connecting pipe (4) is provided with hand valve (6), it is characterized in that, connecting pipe (4) between hand valve (6) with differential flow transmitter (5) is connected pilot arm (3) by threeway, the upper end of this pilot arm (3) connects plug (2), inner and between hand valve (6) and differential flow transmitter (5) connecting pipe (4) inside of pilot arm (3) is full of the liquid heavier than LPG density.
2. a kind of differential flow measurement device improving LPG flow measurement accuracy according to claim 1, it is characterized in that, one end of one of them connecting pipe (4) is communicated with the LPG flow conduit (1) of differential pressure orifice plate (7) side, the other end is communicated with the plemum of differential flow transmitter (5), one end of another connecting pipe (4) is communicated with the LPG flow conduit (1) of differential pressure orifice plate (7) opposite side, and the other end is communicated with the negative pressure chamber of differential flow transmitter (5).
3. a kind of differential flow measurement device improving LPG flow measurement accuracy according to claim 1, is characterized in that, the liquid heavier than LPG density is selected from water or methyl alcohol.
4. a kind of differential flow measurement device improving LPG flow measurement accuracy according to claim 1, is characterized in that, the caliber size of described pilot arm (3) is identical with connecting pipe (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410038244.9A CN104807509B (en) | 2014-01-26 | 2014-01-26 | A kind of differential flow measurement device for improving LPG flow measurement accuracy |
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| CN201410038244.9A CN104807509B (en) | 2014-01-26 | 2014-01-26 | A kind of differential flow measurement device for improving LPG flow measurement accuracy |
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| CN104807509A true CN104807509A (en) | 2015-07-29 |
| CN104807509B CN104807509B (en) | 2018-06-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766091A (en) * | 2020-07-07 | 2020-10-13 | 西安航天动力试验技术研究所 | Calibration system and method of low-frequency pulsation suppression device for ground test |
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| US6286367B1 (en) * | 1998-03-30 | 2001-09-11 | Schlumberger Technology Corporation | Method of evaluating the effluent of a hydrocarbon well by means of a multiphase flowmeter, and installation implementing the same |
| CN2594770Y (en) * | 2002-11-13 | 2003-12-24 | 卢玖庆 | Throttling differential pressure flowmeter |
| CN201787982U (en) * | 2010-07-24 | 2011-04-06 | 淄博天润气体有限公司 | Flowmeter pressure transmitting device |
| CN203719706U (en) * | 2014-01-26 | 2014-07-16 | 上海华林工业气体有限公司 | Differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy |
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2014
- 2014-01-26 CN CN201410038244.9A patent/CN104807509B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6286367B1 (en) * | 1998-03-30 | 2001-09-11 | Schlumberger Technology Corporation | Method of evaluating the effluent of a hydrocarbon well by means of a multiphase flowmeter, and installation implementing the same |
| CN2594770Y (en) * | 2002-11-13 | 2003-12-24 | 卢玖庆 | Throttling differential pressure flowmeter |
| CN201787982U (en) * | 2010-07-24 | 2011-04-06 | 淄博天润气体有限公司 | Flowmeter pressure transmitting device |
| CN203719706U (en) * | 2014-01-26 | 2014-07-16 | 上海华林工业气体有限公司 | Differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111766091A (en) * | 2020-07-07 | 2020-10-13 | 西安航天动力试验技术研究所 | Calibration system and method of low-frequency pulsation suppression device for ground test |
| CN111766091B (en) * | 2020-07-07 | 2022-03-11 | 西安航天动力试验技术研究所 | Calibration system and method of low-frequency pulsation suppression device for ground test |
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|---|---|
| CN104807509B (en) | 2018-06-12 |
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