CN105987735A - High-precision differential pressure type liquid level measurement device and application thereof - Google Patents
High-precision differential pressure type liquid level measurement device and application thereof Download PDFInfo
- Publication number
- CN105987735A CN105987735A CN201510054834.5A CN201510054834A CN105987735A CN 105987735 A CN105987735 A CN 105987735A CN 201510054834 A CN201510054834 A CN 201510054834A CN 105987735 A CN105987735 A CN 105987735A
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- pressure chamber
- plemum
- negative pressure
- liquid level
- connecting pipe
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- 239000007788 liquid Substances 0.000 title claims abstract description 92
- 238000005259 measurement Methods 0.000 title claims abstract description 34
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 6
- 210000000476 body water Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention relates to a high-precision differential pressure type liquid level measurement device and application thereof. The measurement device comprises a container requiring liquid level measurement, a transmitter, a positive-pressure chamber pressure guide pipe and a negative-pressure chamber pressure guide pipe. A positive-pressure chamber of the transmitter is communicated with a lower end of the container requiring liquid level measurement through the positive-pressure chamber pressure guide pipe, and a negative-pressure chamber of the transmitter is communicated with a high end of the container requiring liquid level measurement through the negative-pressure chamber pressure guide pipe. The highest end of the negative-pressure chamber pressure guide pipe is externally connected with a negative-pressure chamber liquid injection pipe, the highest end of the positive-pressure chamber pressure guide pipe is externally connected with a positive-pressure chamber liquid injection pipe, and each of the negative-pressure chamber liquid injection pipe and the positive-pressure chamber liquid injection pipe is provided with a plug or a check valve. Before use of the measurement device, the positive-pressure chamber, the negative-pressure chamber, the positive-pressure chamber pressure guide pipe and the negative-pressure chamber pressure guide pipe are filled with a to-be-tested liquid medium through the negative-pressure chamber liquid injection pipe and the positive-pressure chamber liquid injection pipe. Compared with the prior art, the high-precision differential pressure type liquid level measurement device has advantages that influences on measurement accuracy due to backflow of the positive-pressure chamber pressure guide pipe can be counteracted, and accordingly influences on instrument measurement due to technical production fluctuation can be counteracted.
Description
Technical field
The present invention relates to a kind of liquid level emasuring device, especially relate to a kind of high accuracy differential pressure type liquid level measurement device
And application.
Background technology
Differential pressure type level gauge is applied quite varied in chemical enterprise, can measure the liquid level of various medium.But have
Time, the impact of technological fluctuation directly can produce deviation to liquidometer.When measuring a torch tank body water sealing liquid position,
The medium measured is water, and this water level has fluctuation, the most even can arrive canful.And during liquidometer measurement, be logical
Cross plemum connecting pipe, the static pressure of liquid is imported transmitter, and negative pressure chamber is logical air, when tank level is sent out
During changing, the pressure of transmitter plemum impression will change, and now liquid level just can be calculated by electronics
Module is calculated.But when tank body water level is full, water can overflow to pour in down a chimney to transmitter bears connecting pipe, now, pick-up
The pressure of device plemum impression will deduct the pressure of negative pressure chamber's impression.So, tank body is full when, liquid level is just
Can be forbidden, and the water poured in down a chimney just can not arranged all the time, is also forbidden when causing non-canful.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide a kind of simple in construction,
Easy to use, measurement high accuracy differential pressure type liquid level measurement device and application thereof accurately.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of high accuracy differential pressure type liquid level measurement device, including liquid level container to be measured, transmitter, plemum connecting pipe
With negative pressure chamber's connecting pipe, the plemum of described transmitter connects the low of liquid level container to be measured by plemum connecting pipe
End, the negative pressure chamber of transmitter surveys high-end, described negative pressure chamber's pilot of liquid level container by negative pressure chamber's connecting pipe connection
Pipe most significant end external connecting negative pressure room liquid injection pipe, the most significant end external plemum liquid injection pipe of described plemum connecting pipe.
It is provided with plug or stop valve on described negative pressure chamber's liquid injection pipe and plemum liquid injection pipe.
It is respectively equipped with hand-operated valve on described plemum connecting pipe and negative pressure chamber's connecting pipe.
Described plemum connecting pipe is identical with negative pressure chamber's connecting pipe caliber and specification.
Described plemum connecting pipe, negative pressure chamber's connecting pipe, negative pressure chamber's liquid injection pipe all use phase with plemum liquid injection pipe
Body with caliber.
Described plemum connecting pipe is provided with the perseverance for being passed through circulation constant temperature water with the outside of negative pressure chamber's connecting pipe
Warm sleeve.
The plemum of described transmitter and negative pressure chamber are equipped with drain plug.
The application of a kind of high accuracy differential pressure type liquid level measurement device, comprises the following steps:
Step one: by negative pressure chamber's liquid injection pipe with plemum liquid injection pipe by the plemum of transmitter, negative pressure chamber, malleation
Fill testing liquid medium in room connecting pipe and negative pressure chamber's connecting pipe, then by plug or stop valve, negative pressure chamber is noted
Liquid pipe seals with plemum liquid injection pipe, and now the show value on transmitter is the differential static pressure of plemum and negative pressure chamber,
At this point it is possible to instrumentation, differential static pressure now being offset is zero；
Step 2: open plemum connecting pipe and the hand-operated valve on negative pressure chamber's connecting pipe, in liquid level container to be measured
Liquid medium produces pressure to the plemum of transmitter with negative pressure chamber, and now the show value on transmitter deducts step 2
In show value be the true liquid level in liquid level container to be measured, because plemum connecting pipe and negative pressure chamber's connecting pipe are all
Being filled with water, do not produced measured deviation by level fluctuation in liquid level container to be measured, therefore measurement result is
Accurately.
Compared with prior art, the present invention has the following advantages and beneficial effect:
(1) assembly of the invention is changed the least compared with traditional differential pressure type liquid level measurement device, can be original
Directly change on device basic, the lowest compared to expense for other measurement apparatus, it is not necessary to a large amount of expenses.
(2) assembly of the invention can offset negative pressure chamber's connecting pipe affects accurately measurement because pouring in down a chimney water, can support
Disappear because of technique fluctuation the impact on instrument measurement；
(3), when using assembly of the invention, it is hydraulically full state in plemum and negative pressure chamber, does not contains gas,
Decrease plemum and the corrosion within negative pressure chamber, improve the service life of transmitter.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high accuracy differential pressure type liquid level measurement device of the present invention.
Detailed description of the invention
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
A kind of high accuracy differential pressure type liquid level measurement device, as it is shown in figure 1, include liquid level container 1 to be measured, transmitter
2, plemum connecting pipe 3 and negative pressure chamber's connecting pipe 4, the plemum of transmitter 2 is by plemum connecting pipe 3 even
The low side of logical liquid level container 1 to be measured, the negative pressure chamber of transmitter 2 surveys liquid level container by negative pressure chamber's connecting pipe 4 connection
1 high-end, negative pressure chamber's connecting pipe 4 most significant end external connecting negative pressure room liquid injection pipe 5, the most significant end of plemum connecting pipe 3
External plemum liquid injection pipe 6.It is provided with plug 7 or stop valve on negative pressure chamber's liquid injection pipe 5 and plemum liquid injection pipe 6.
It is respectively equipped with hand-operated valve 8 on plemum connecting pipe 3 and negative pressure chamber's connecting pipe 4.Plemum connecting pipe 3, negative pressure chamber
Connecting pipe 4, negative pressure chamber's liquid injection pipe 5 and plemum liquid injection pipe 6 all use the body of identical caliber and specification.Malleation
Room connecting pipe 3 is provided with the constant temperature sleeve pipe for being passed through circulation constant temperature water with the outside of negative pressure chamber's connecting pipe 4.Pick-up
The plemum of device 2 and negative pressure chamber are equipped with drain plug.
When using high accuracy differential pressure type liquid level measurement device as shown in Figure 1, comprise the following steps:
Step one: by negative pressure chamber's liquid injection pipe 5 and plemum liquid injection pipe 6 by the plemum of transmitter 2, negative pressure chamber,
Testing liquid medium is filled, then by plug 7 or stop valve in plemum connecting pipe 3 and negative pressure chamber's connecting pipe 4
Negative pressure chamber's liquid injection pipe 5 is sealed with plemum liquid injection pipe 6, now the show value on transmitter 2 be plemum with
The differential static pressure of negative pressure chamber, at this point it is possible to instrumentation, differential static pressure now being offset is zero；
Step 2: open plemum connecting pipe 3 and the hand-operated valve on negative pressure chamber's connecting pipe 4, liquid level container 1 to be measured
Interior liquid medium produces pressure to the plemum of transmitter with negative pressure chamber, and now the show value on transmitter 2 deducts
Show value in step 2 is the true liquid level in liquid level container 1 to be measured, because plemum connecting pipe 3 and negative pressure
Room connecting pipe 4 has been filled with water, is not produced measured deviation by level fluctuation in liquid level container 1 to be measured,
Therefore measurement result is accurate.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and use to send out
Bright.These embodiments obviously easily can be made various amendment by person skilled in the art, and at this
The General Principle illustrated is applied in other embodiments without through performing creative labour.Therefore, the present invention does not limits
In above-described embodiment, those skilled in the art are according to the announcement of the present invention, without departing from changing that scope is made
Entering and revise all should be within protection scope of the present invention.
Claims (8)
1. high accuracy a differential pressure type liquid level measurement device, including liquid level container (1) to be measured, transmitter (2),
Plemum connecting pipe (3) and negative pressure chamber's connecting pipe (4), the plemum of described transmitter (2) passes through plemum
Connecting pipe (3) connects the low side of liquid level container (1) to be measured, and the negative pressure chamber of transmitter (2) is led by negative pressure chamber
The high-end of liquid level container (1) is surveyed in pressure pipe (4) connection, it is characterised in that described negative pressure chamber's connecting pipe (4)
Most significant end external connecting negative pressure room liquid injection pipe (5), the most significant end external plemum note of described plemum connecting pipe (3)
Liquid pipe (6).
A kind of high accuracy differential pressure type liquid level measurement device the most according to claim 1, it is characterised in that institute
It is provided with plug (7) or stop valve on the negative pressure chamber's liquid injection pipe (5) stated and plemum liquid injection pipe (6).
A kind of high accuracy differential pressure type liquid level measurement device the most according to claim 1, it is characterised in that institute
It is respectively equipped with hand-operated valve (8) on the plemum connecting pipe (3) stated and negative pressure chamber's connecting pipe (4).
A kind of high accuracy differential pressure type liquid level measurement device the most according to claim 1, it is characterised in that institute
The plemum connecting pipe (3) stated is identical with negative pressure chamber's connecting pipe (4) caliber and specification.
A kind of high accuracy differential pressure type liquid level measurement device the most according to claim 1, it is characterised in that institute
Plemum connecting pipe (3), negative pressure chamber's connecting pipe (4), negative pressure chamber's liquid injection pipe (5) and the plemum liquid injection pipe stated
(6) body of identical caliber is all used.
A kind of high accuracy differential pressure type liquid level measurement device the most according to claim 1, it is characterised in that institute
The plemum connecting pipe (3) stated is provided with for being passed through circulation constant temperature water with the outside of negative pressure chamber's connecting pipe (4)
Constant temperature sleeve pipe.
A kind of high accuracy differential pressure type liquid level measurement device the most according to claim 1, it is characterised in that institute
The plemum of the transmitter (2) stated and negative pressure chamber are equipped with drain plug.
8. the application of a high accuracy differential pressure type liquid level measurement device as claimed in claim 1, it is characterised in that
Comprise the following steps:
Step one: by negative pressure chamber's liquid injection pipe (5) with plemum liquid injection pipe (6) by the malleation of transmitter (2)
Testing liquid medium is filled, then in room, negative pressure chamber, plemum connecting pipe (3) and negative pressure chamber's connecting pipe (4)
By plug (7) or stop valve, negative pressure chamber's liquid injection pipe (5) is sealed with plemum liquid injection pipe (6), this time-varying
The show value on device (2) is sent to be the differential static pressure of plemum and negative pressure chamber；
Step 2: open plemum connecting pipe (3) and the hand-operated valve on negative pressure chamber's connecting pipe (4), liquid level to be measured
Liquid medium in container (1) produces pressure with negative pressure chamber, now on transmitter (2) to the plemum of transmitter
Show value deduct the true liquid level that the show value in step 2 is in liquid level container (1) to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054834.5A CN105987735A (en) | 2015-02-03 | 2015-02-03 | High-precision differential pressure type liquid level measurement device and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054834.5A CN105987735A (en) | 2015-02-03 | 2015-02-03 | High-precision differential pressure type liquid level measurement device and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105987735A true CN105987735A (en) | 2016-10-05 |
Family
ID=57037020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510054834.5A Pending CN105987735A (en) | 2015-02-03 | 2015-02-03 | High-precision differential pressure type liquid level measurement device and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105987735A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466082A (en) * | 2021-06-29 | 2021-10-01 | 西安西电变压器有限责任公司 | High-vacuum intelligent micro-water measuring device and method |
| CN113720416A (en) * | 2021-08-31 | 2021-11-30 | 广船国际有限公司 | Ship liquid level measuring device and measuring method |
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|---|---|---|---|---|
| CN201413174Y (en) * | 2009-06-17 | 2010-02-24 | 中冶赛迪工程技术股份有限公司 | Water supplementing device of steam drum liquid level measurement balance container |
| CN201897495U (en) * | 2010-11-04 | 2011-07-13 | 迈瑞尔实验设备（上海）有限公司 | Liquid level measuring device |
| CN202903276U (en) * | 2012-09-21 | 2013-04-24 | 中昊晨光化工研究院有限公司 | Liquid level gauge |
| CN203148508U (en) * | 2013-03-12 | 2013-08-21 | 华油天然气广安有限公司 | Pressure-leading device of transmitter for measuring liquid level in LNG production equipment |
| WO2013168065A1 (en) * | 2012-05-09 | 2013-11-14 | Rancilio Group S.p.A. | Milk level measurement device and related measurement method |
-
2015
- 2015-02-03 CN CN201510054834.5A patent/CN105987735A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201413174Y (en) * | 2009-06-17 | 2010-02-24 | 中冶赛迪工程技术股份有限公司 | Water supplementing device of steam drum liquid level measurement balance container |
| CN201897495U (en) * | 2010-11-04 | 2011-07-13 | 迈瑞尔实验设备（上海）有限公司 | Liquid level measuring device |
| WO2013168065A1 (en) * | 2012-05-09 | 2013-11-14 | Rancilio Group S.p.A. | Milk level measurement device and related measurement method |
| CN202903276U (en) * | 2012-09-21 | 2013-04-24 | 中昊晨光化工研究院有限公司 | Liquid level gauge |
| CN203148508U (en) * | 2013-03-12 | 2013-08-21 | 华油天然气广安有限公司 | Pressure-leading device of transmitter for measuring liquid level in LNG production equipment |
Non-Patent Citations (1)
| Title |
|---|
| 胡忠泽: "差压法测量液位问题探讨", 《石油化工自动化》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466082A (en) * | 2021-06-29 | 2021-10-01 | 西安西电变压器有限责任公司 | High-vacuum intelligent micro-water measuring device and method |
| CN113466082B (en) * | 2021-06-29 | 2023-10-03 | 西安西电变压器有限责任公司 | High-vacuum intelligent micro-water measuring device and method |
| CN113720416A (en) * | 2021-08-31 | 2021-11-30 | 广船国际有限公司 | Ship liquid level measuring device and measuring method |
| CN113720416B (en) * | 2021-08-31 | 2024-02-02 | 广船国际有限公司 | Ship liquid level measuring device and measuring method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161005 |