CN203719706U - Differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy - Google Patents
Differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy Download PDFInfo
- Publication number
- CN203719706U CN203719706U CN201420050999.6U CN201420050999U CN203719706U CN 203719706 U CN203719706 U CN 203719706U CN 201420050999 U CN201420050999 U CN 201420050999U CN 203719706 U CN203719706 U CN 203719706U
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- Prior art keywords
- lpg
- flow measurement
- differential
- differential pressure
- flow
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- Expired - Fee Related
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 35
- 239000003915 liquefied petroleum gas Substances 0.000 title abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 17
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000002309 gasification Methods 0.000 abstract description 6
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model relates to a differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy. The differential pressure flow measurement device comprises an LPG flow pipeline, a differential pressure orifice plate, pressure guide pipes and a differential pressure flow transmitter, wherein the differential pressure orifice plate is arranged in the LPG flow pipeline; the two ends of each of the two pressure guide pipes are respectively connected with the LPG flow pipeline and the differential pressure orifice plate; a hand valve is arranged on each pressure guide pipe; each pressure guide pipe between the corresponding hand valve and the differential pressure flow transmitter is connected with a pressure guide branch pipe through a tee joint; the end of each pressure guide branch pipe is connected with a plug; liquid of which the density is heavier than that of the LPG is filled in the pressure guide branch pipes and is filled in the pressure guide pipe between each hand valve and the differential pressure flow transmitter. Compared with the prior art, the differential pressure flow measurement device is simple in structure, low in cost, convenient to use and wide in application range, can eliminate the influence of the gasification of the LPG on flow measurement and can be applied to the liquid flow measurement in other similar fields.
Description
Technical field
The utility model relates to a kind of differential flow measurement device, especially relates to a kind of differential flow measurement device of the LPG of raising flow measurement accuracy.
Background technology
LPG (liquefied petroleum gas (LPG)), than being easier to liquefaction, is gaseous state at normal temperatures and pressures, be easy to change liquid state into from gaseous state, and the LPG generally using 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 mobile house steward, and connecting pipe is thinner, the LPG drawing is again static, be easy to influenced by ambient temperature and occur gasification, thereby while causing measuring flow because gasification flowmeter is inaccurate.
Chinese patent CN100425954 has announced 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: by connecting pipe, high-pressure side pressure survey is chewed to the fluid pressure signal that pressure survey is chewed with low pressure end respectively and be passed to differential pressure pickup; By differential pressure pickup detected pressures difference signal; Differential pressure pickup passes to extracting operation transmitter or intelligent controller or computing machine by pressure difference signal, and obtains flow values by the pressure difference signal of receiving.This apparatus structure is comparatively complicated, and cost is higher, does not have broad applicability.
Utility model content
The purpose of this utility model is exactly that a kind of differential flow measurement device of raising LPG flow measurement accuracy simple in structure is provided in order to overcome the defect of above-mentioned prior art existence, and this device can be eliminated because LPG easily gasifies and causes the problem that flow measurement is inaccurate.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of differential flow measurement device that improves 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, on connecting pipe between hand valve and differential flow transmitter, by threeway, be connected pilot arm, the upper end of this pilot arm connects plug, connecting pipe inside between pilot arm inside and hand valve and differential flow transmitter 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 one 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.
Due to from pilot arm to being all full of the heavier liquid of density differential flow transmitter, LPG is because density gently and not can enter connecting pipe, LPG gasification can not occur in connecting pipe yet like this, therefore can eliminate because LPG easily gasifies and causes the problem that flow measurement is inaccurate.
While using device of the present utility model, by following steps, carry out flow measurement:
(1) open plemum valve, negative pressure chamber's valve and the equalizing valve on differential flow transmitter;
(2) open the plug that two pilots are propped up tube end, since a pilot, prop up the plug of tube end and fill with the liquid (as water or methyl alcohol) heavier than LPG, until another root pilot is propped up the plug place of tube end, emerge by filling liquid;
(3) the plemum valve on shut off differential pressure formula flow transmitter, negative pressure chamber's valve and equalizing valve;
(4) block plug;
(5) open hand valve, differential flow transmitter comes into operation.
Compared with prior art, the utility model is simple in structure, with low cost, can eliminate the impact of LPG gasification on flow measurement, and easy to use, can apply field similar to other and carry out liquid flow measurement, and usable range is wide.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
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 utility model is elaborated.
Embodiment
A kind of differential flow measurement device that improves 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, on connecting pipe 4 between hand valve 6 and differential flow transmitter 5, by threeway, be connected pilot arm 3, the upper end of this pilot arm 3 connects plug 2, connecting pipe 4 inside between pilot arm 3 inside and hand valve 6 and differential flow transmitter 5 are 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 one sides, 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 sides, 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, half of the about water of proportion, the about 0.5-0.6g/cm of density
3between, it is 1.0g/cm that the liquid heavier than LPG density is selected from water-mass density
3or methyl alcohol density is 0.7914g/cm
3.
Owing to being all full of the heavier liquid of density from pilot arm 3 to differential flow transmitter 5, LPG is because density gently and not can enter connecting pipe 4, LPG gasification can not occur in connecting pipe 4 yet like this, therefore can eliminate because LPG easily gasifies and causes the problem that flow measurement is inaccurate.
While using device of the present utility model, by following steps, carry out flow measurement:
(1) open plemum valve, negative pressure chamber's valve and the equalizing valve on differential flow transmitter;
(2) open the plug that two pilots are propped up tube end, since a pilot, prop up the plug of tube end and fill with the liquid (as water or methyl alcohol) heavier than LPG, until another root pilot is propped up the plug place of tube end, emerge by filling liquid;
(3) the plemum valve on shut off differential pressure formula flow transmitter, negative pressure chamber's valve and equalizing valve;
(4) block plug;
(5) open hand valve, differential flow transmitter comes into operation.
Claims (4)
1. a differential flow measurement device that improves 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, hand valve (6) is above connected pilot arm (3) by threeway with the connecting pipe (4) between differential flow transmitter (5), the upper end of this pilot arm (3) connects plug (2), connecting pipe (4) inside between pilot arm (3) inside and hand valve (6) and differential flow transmitter (5) is full of the liquid heavier than LPG density.
2. a kind of differential flow measurement device that improves 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) one sides, 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 that improves 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 that improves 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050999.6U CN203719706U (en) | 2014-01-26 | 2014-01-26 | Differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050999.6U CN203719706U (en) | 2014-01-26 | 2014-01-26 | Differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203719706U true CN203719706U (en) | 2014-07-16 |
Family
ID=51158846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420050999.6U Expired - Fee Related CN203719706U (en) | 2014-01-26 | 2014-01-26 | Differential pressure flow measurement device capable of improving LPG (liquefied petroleum gas) flow measurement accuracy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203719706U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807509A (en) * | 2014-01-26 | 2015-07-29 | 上海华林工业气体有限公司 | Differential pressure type flow measuring device capable of improving LPG flow measurement accuracy |
| CN110058047A (en) * | 2019-05-14 | 2019-07-26 | 哈尔滨工程大学 | Steam flow rate measuring system in a kind of runner |
-
2014
- 2014-01-26 CN CN201420050999.6U patent/CN203719706U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807509A (en) * | 2014-01-26 | 2015-07-29 | 上海华林工业气体有限公司 | Differential pressure type flow measuring device capable of improving LPG flow measurement accuracy |
| CN104807509B (en) * | 2014-01-26 | 2018-06-12 | 上海华林工业气体有限公司 | A kind of differential flow measurement device for improving LPG flow measurement accuracy |
| CN110058047A (en) * | 2019-05-14 | 2019-07-26 | 哈尔滨工程大学 | Steam flow rate measuring system in a kind of runner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20190126 |