CN206223347U - The unstable pressure difference meter of high pressure - Google Patents
The unstable pressure difference meter of high pressure Download PDFInfo
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- CN206223347U CN206223347U CN201621271482.5U CN201621271482U CN206223347U CN 206223347 U CN206223347 U CN 206223347U CN 201621271482 U CN201621271482 U CN 201621271482U CN 206223347 U CN206223347 U CN 206223347U
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Abstract
The utility model discloses a kind of unstable pressure difference meter of high pressure, the unstable pressure difference meter of the high pressure includes：One group of vertical and connection pressure-measuring pipe, is connected by holding wire with resistance instrument；Resistance instrument is connected with data acquisition process control system；Low conductivity buffer solution and high conductivity manometric liquid are full of in pressure-measuring pipe；Resistance instrument is used to measure resistance in pressure-measuring pipe；Data acquisition process control system is used to for the resistance that resistance instrument is measured to be converted to pressure difference.The unstable pressure difference meter of high pressure of the present utility model, can bear environmental pressure very high, reach the certainty of measurement requirement of micro-pressure-difference；Can realize the real-time monitoring of unstable micro-pressure-difference under condition of high voltage, and can be in real time record experimentation pressure difference minor fluctuations.
Description
Technical field
The utility model is related to flow of fluid and oil-gas reservoir exploitation physical simulation experiment technical field, more particularly to a kind of high
Press unstable pressure difference meter.
Background technology
In the physical simulation experiment related to oil-gas reservoir exploitation, simulate actual oil-gas reservoir pressure may be up to 30 MPas with
On, and need the seepage flow and displacement of reservoir oil simulated experiment pressure difference of measurement minimum up to less than 0.01 MPa.
Conventional differential manometer cannot under tens MPas of condition of high voltage accurate measurement micro-pressure-difference, more cannot accurate measurement reality
The dynamic change of micro-pressure-difference and fluctuation during testing.The principle of piezoelectric type differential pressure be by pressure measurement diaphragm induction pressure,
Used under condition of high voltage (40 MPas), the pressure measurement diaphragm of thickening causes certainty of measurement too low (deviation is 0.24 MPa).Compensation
The differential manometer that declines is based on the pressure measuring principle of U-tube pressure gauge, the use of pressure limit is 0 MPa to 2.5 by the pressure-resistant limitation of glass tube
×10-3MPa.Condenser type pressure difference meter measures pressure difference by measuring electric capacitance change that pressure difference causes, it is impossible to measure under high pressure
Small pressure difference.Chinese patent application 201510178391.0 discloses a kind of micro-pressure-difference metering device for High-Voltage Experimentation, leads to
Cross grating and search for liquid level change automatically, it is possible to achieve minute-pressure difference measurements under condition of high voltage, liquid level identification can reach 0.1mm, but
Searched for automatically due to grating it is time-consuming more long, it is necessary to wait pressure difference stabilization after could realize measuring, it is impossible to what realization was changed over time
The continuous metering of unstable micro-pressure-difference fluctuation.
Therefore, it is oil-gas reservoir (particularly fine and close oil-gas reservoir) for the unstable micro-pressure-difference dynamic measuring of High-Voltage Experimentation to solve
The technological difficulties that exploitation related experiment is urgently captured.
Utility model content
The utility model embodiment provides a kind of unstable pressure difference meter of high pressure, for unstable micro- under the conditions of High-Voltage Experimentation
The accurate measurement of pressure difference, the unstable pressure difference meter of the high pressure includes：
One group of vertical and connection pressure-measuring pipe, is connected by holding wire 4 with resistance instrument 2；Resistance instrument 2 and data acquisition process
Control system 3 is connected；
Low conductivity buffer solution and high conductivity manometric liquid are full of in pressure-measuring pipe；Resistance instrument 2 is used to measure electricity in pressure-measuring pipe
Resistance；Data acquisition process control system 3 is used to for the resistance that resistance instrument 2 is measured to be converted to pressure difference.
The unstable pressure difference meter of high pressure of the utility model embodiment, can bear environmental pressure very high, reach minute-pressure
Poor certainty of measurement requirement；The real-time monitoring of unstable micro-pressure-difference under condition of high voltage can be realized, and can real time record experiment
During pressure difference minor fluctuations.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the utility model embodiment, below will be to needed for embodiment description
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.In the accompanying drawings：
Fig. 1 is the exemplary plot of the utility model unstable pressure difference meter of embodiment mesohigh；
Fig. 2 is resistance-differential pressure measurement calibration exemplary plot under normal pressure in the utility model embodiment.
Specific embodiment
It is right below in conjunction with the accompanying drawings for the purpose, technical scheme and advantage for making the utility model embodiment become more apparent
The utility model embodiment is described in further details.Here, schematic description and description of the present utility model is used to solve
The utility model is released, but is not intended as to restriction of the present utility model.
The limitation of adaptability, the utility model reality are tested high pressure micro-pressure-difference for existing micro-pressure-difference tester and technology
Example is applied there is provided a kind of unstable pressure difference meter of high pressure.In the unstable pressure difference meter of high pressure of the utility model embodiment, will
The pressure-measuring pipe of several vertical connections is connected to by detection experiment apparatus, using resistance value in precision resistance instrument measurement pressure-measuring pipe, according to
Low conductivity buffer solution and high conductivity manometric liquid intersection liquid level, realize to micro-pressure-difference under condition of high voltage in this determination pipe
Real-time monitoring.The unstable pressure difference meter main composition of high pressure of the utility model embodiment has：Pressure-measuring pipe, resistance instrument, data
Acquisition process control system, low conductivity buffer solution and high conductivity manometric liquid.
Below in conjunction with the accompanying drawings 1, the unstable pressure difference meter of high pressure to the utility model embodiment elaborates.Need
It is bright, in Fig. 1, by the unstable pressure difference meter of high pressure include 4 pressure-measuring pipes as a example by, illustrate solve condition of high voltage under continuously it is micro-
The technical problem of pressure difference real-time monitoring.Those skilled in the art could be aware that 4 pressure-measuring pipes are only one in Fig. 1, in actual reality
Many pressure-measuring pipes of other quantity can be arranged as required to when applying.
With reference to Fig. 1 it is known that the unstable pressure difference meter of the high pressure of the utility model embodiment can include：
One group of vertical and connection pressure-measuring pipe, is connected by holding wire 4 with resistance instrument 2；Resistance instrument 2 and data acquisition process
Control system 3 is connected；Low conductivity buffer solution and high conductivity manometric liquid are full of in pressure-measuring pipe；Resistance instrument 2 is used to measure pressure measurement
Resistance in pipe；Data acquisition process control system 3 is used to for the resistance that resistance instrument 2 is measured to be converted to pressure difference.
In the unstable pressure difference meter of high pressure of the utility model embodiment, the tolerable 100 MPas pressure of pressure-measuring pipe highest,
Low conductivity buffer solution and high conductivity manometric liquid in pressure-measuring pipe, can use in the experimental situation of high pressure.Pressure-measuring pipe connection electricity
Resistance instrument, by resistance instrument monitor pipe internal resistance value change, and in real time by Monitoring Data feed back to data acquisition process control system
System, data acquisition process control system can know the height of high conductivity manometric liquid in pipe by the change of resistance, so that real
Now to the precision real time measuring of micro-pressure-difference.In embodiment, resistance instrument can be connected by one or more pressure-measuring pipe.As being in Fig. 1
Resistance instrument 2 is connected by first pressure-measuring pipe 6.
In embodiment, low conductivity buffer solution and high conductivity manometric liquid are full of in pressure-measuring pipe.In another embodiment, survey
B alloy wire 5 can be pre-installed in pressure pipe, as shown in Figure 1.During implementation, without prepackage B alloy wire 5 and prepackage B alloy wire 5 in pressure-measuring pipe
Two kinds in the case of, can realize the measurement of the unstable micro-pressure-difference of high pressure.
Again as shown in figure 1, in one embodiment, in the unstable pressure difference meter of high pressure of the utility model embodiment,
Can also include：The first intermediate receptacle 27 and the second intermediate receptacle 28 for being connected with pressure-measuring pipe respectively；First intermediate receptacle 27 is filled
There is high conductivity manometric liquid；Second intermediate receptacle 28 is equipped with low conductivity buffer solution；Respectively with the first intermediate receptacle 27 and second
The injection pump 31 of the connection of intermediate receptacle 28.
Additionally, in embodiment, each pressure-measuring pipe head and the tail two ends can respectively set a valve, then by setting valvular centre
Pipeline is connected with other pressure-measuring pipes；Head end cut-in valve 1 is additionally provided with first head end pipeline of pressure-measuring pipe 6, last root pressure-measuring pipe 6
Tail end cut-in valve 24 is additionally provided with head end pipeline；Head end cut-in valve 1 is connected into High-Voltage Experimentation environment head end；Tail end cut-in valve 24 is connected into
High-Voltage Experimentation environment tail end.
Elaborated with reference to Fig. 1 further below.As shown in figure 1, the high pressure of the utility model embodiment is unstable micro-
Differential manometer, including：
Head end cut-in valve 1, resistance instrument 2, data acquisition process control system 3, holding wire 4, B alloy wire 5, first pressure measurement
Pipe 6, second pressure-measuring pipe 7, the 3rd pressure-measuring pipe 8, the 4th pressure-measuring pipe 9, the first valve 10, the second valve 11, the 3rd valve
12, the 4th valve 13, the 5th valve 14, the 6th valve 15, the 7th valve 16, the 8th valve 17, the 9th valve 18, the tenth valve
19, the 11st valve 20, the 12nd valve 21, the 13rd valve 22, the 14th valve 23, the valve of tail end cut-in valve the 24, the 15th
The 25, the 16th valve 26 of door, the first intermediate receptacle 27, the valve 29 of the second intermediate receptacle the 28, the 17th, the 18th valve 30, note
Enter pump 31.
B alloy wire 5 is pre-loaded with inside first pressure-measuring pipe and be connected with pipe external signal line 4 access resistance instrument 2, resistance instrument 2
It is connected with data acquisition process control system 3, after first head end of pressure-measuring pipe 6 (top) is connected with the first valve 10, connects respectively
Head end cut-in valve 1, and be connected with second head end of pressure-measuring pipe 7 through the 9th valve 18 and the second valve 11 successively；First pressure measurement
The tail end of pipe 6 (bottom) is successively through the 5th valve 14, the 12nd valve 21 and the 6th valve 15 and second tail end phase of pressure-measuring pipe 7
Even；Second head end of pressure-measuring pipe 7 is successively through the second valve 2 11, the tenth valve 19 and the 3rd valve 12 and the 3rd pressure-measuring pipe 8
Head end is connected；Second tail end of pressure-measuring pipe 7 is surveyed through the 6th valve 15, the 13rd valve 22 and the 7th valve 16 and the 3rd successively
The tail end of pressure pipe 8 is connected；3rd head end of pressure-measuring pipe 8 is successively through the 3rd valve 12, the 11st valve 20 and the 4th valve 13 and
Four head ends of pressure-measuring pipe 9 are connected, and the 3rd tail end of pressure-measuring pipe 8 is successively through the 7th valve 16, the 14th valve 23 and the 8th valve
17 are connected with the 4th tail end of pressure-measuring pipe 9；4th head end of pressure-measuring pipe 9 is through the connection tail end of the 3rd valve 12 cut-in valve 24.
Head end cut-in valve 1 and tail end cut-in valve 24 access High-Voltage Experimentation environment from head end and tail end respectively, are non-steady high pressure
Determine pressure difference meter and head end and tail end pressure are provided, as the access port of the unstable pressure difference meter of high pressure.First intermediate receptacle 27, the
Two intermediate receptacles 28 are respectively provided with high conductivity manometric liquid and low conductivity buffer solution.The top of second intermediate receptacle 28 is connected to the
16 valves 26, bottom is connected to the 18th valve 30；The top of first intermediate receptacle 27 is connected to the 17th valve 29, and bottom connects
It is connected to the 15th valve 25.First intermediate receptacle 27, the second intermediate receptacle 28 is respectively through the 17th valve 29 and the 18th valve
30 access injection pump 31.4th head end of pressure-measuring pipe 9 also connects the second intermediate receptacle through the 3rd valve 12 and the 16th valve 26
28 tops；4th tail end of pressure-measuring pipe 9 is also through the 8th valve 17 and connection the first intermediate receptacle 27 of the 15th valve 25 bottom.
In the example of fig. 1, many pressure-measuring pipe connections, B alloy wire loads first pressure-measuring pipe, is pumped into many pressure-measuring pipes
Low conductivity buffer solution is until be full of many pressure-measuring pipes, many pressure-measuring pipes pump into another different densities conductance high from bottom of the tube
Rate manometric liquid, seals after reaching high pressure resistant insulation measurement pipe middle part to high conductivity manometric liquid liquid level；First pressure-measuring pipe two ends
It is connected with resistance instrument, resistance instrument is connected with data acquisition process control system again, by resistance, data in resistance instrument measurement pipeline
The resistance that acquisition process control system can be measured according to resistance instrument recognizes the different electrically liquid level intersections of two kinds of different densities
Position, is thus calculated the height of the different electrically liquid levels of two kinds of different densities, is converted to pressure difference.As can be seen here, this practicality is new
The unstable pressure difference meter of high pressure of type embodiment, it is sharp by the different electrically manometric liquids of two kinds of different densities are injected in pressure-measuring pipe
Can be realized to continuous micro-pressure-difference real-time monitoring under condition of high voltage with resistance instrument and data acquisition process control system.
In embodiment, pressure-measuring pipe can be made up of nonmetallic high pressure resistant pipe, for example can be high pressure resistant glass tube or its
Its nonmetallic high pressure resistant tubes of material, highest can bear 100 MPas of pressure.In order to measure extremely low flow in shorter experimental period
Fluid pressure difference, the very little that the internal diameter of high pressure resistant pressure-measuring pipe can be set, such as the internal diameter of high pressure resistant pressure-measuring pipe more than or equal to 1mm and
Less than or equal to 2mm, it is 2mm that can such as use internal diameter.In order to obtain larger single group U-tube range, pressure measurement length of tube can be compared with
Long, the length of such as pressure-measuring pipe is more than or equal to 1.5m and less than or equal to 2m.It can be of course be appreciated by those skilled in the art that pressure-measuring pipe
Internal diameter and length can according to the actual requirements use other values.
In embodiment, injection pump 31 can be high-pressure pump.For example, can be ISCO (100DX) twin cylinder pump, pump housing volume
It is 103ml, flow rates：0.00001-45ml/min, pressure limit：0-70MPa.It is high conductivity in first intermediate receptacle 27
Manometric liquid, can select the liquid such as mercury.It is low conductivity buffer solution in second intermediate receptacle 28, can select saturated sodium-chloride molten
Liquid.When B alloy wire is preinstalled with pressure-measuring pipe, low conductivity buffer solution need not select saturated nacl aqueous solution, be replaced with running water
Also may be used.
During implementation, pressure-measuring pipe is connected with the resistance instrument 2 outside pipe using holding wire 4, and access data acquisition process control
System processed 3, the resistance in real-time control and accurately record pressure-measuring pipe changes with time.Can be used by the signal of resistance variations
In the different electrical liquid heights of accurate two kinds of different densities of identification.When low conductivity buffer solution (such as saturated nacl aqueous solution)
By when, resistance reaches maximum in pressure-measuring pipe, when have high conductivity manometric liquid (such as mercury) pass through when, resistance meeting in pressure-measuring pipe
Rule is produced to change with two kinds of changes of liquid surface position, there is provided very strong resistance signal continuously can simultaneously be remembered in real time
Record, realizes to continuous micro-pressure-difference real-time monitoring under condition of high voltage.Can be surveyed from precision resistance instrument in the utility model embodiment
Amount, measurement frequency most can reach 22 times/second soon, and precision is 0.05%.
The unstable pressure difference meter of the utility model embodiment mesohigh can be carried out under hyperbaric environment, for example the high-pressure solid
Testing can be carried out in less than 100 MPas；Measured unstable micro-pressure-difference can be controlled in less scope, and for example this is non-steady
Determining micro-pressure-difference can be in the range of 0 MPa to 2 MPas, it is also possible to higher than 2 MPas.Pressure-measuring pipe can bear high pressure, for example, survey
Pressure pipe can bear the pressure less than or equal to 100 MPas.And it is possible to expand measurement range using compound u-tube structure.Due to
Pressure measurement length of tube will not be oversize, and using single group U-tube, measurement pressure differential range is smaller (0~0.2 MPa)；Using two groups of U-tubes,
Differential pressure measurement scope can expand to 0~0.2 MPa.Using more multigroup U-tube, differential pressure measurement scope can expand to 0~2 MPa,
It can be higher than 2 MPas.
By above-described embodiment it is known that the unstable pressure difference meter of the high pressure of the utility model embodiment has following spy
Point：
(1) the unstable pressure difference meter of the high pressure of the utility model embodiment, the pressure-measuring pipe of selection can bear ring higher
Border pressure.By experiment it is known that the resistance instrument selected can reach 0.1 Europe to the identification that two kinds of manometric liquids electrically change
Nurse, by adjusting high conductivity manometric liquid and low conductivity buffers combinations, the micro-pressure-difference resolution limit that can be measured is 10-8
MPa, therefore can reach the certainty of measurement requirement of micro-pressure-difference.
(2) the unstable pressure difference meter of the high pressure of the utility model embodiment, is controlled by resistance instrument and data acquisition process
System can realize the monitoring that resistance in pressure-measuring pipe is changed and changed with pressure difference, so as to realize to two kinds of liquid interfaces in pipe
Change in location carries out real-time monitoring, can reach to continuous micro-pressure-difference real-time monitoring under condition of high voltage, accurate record unstable state pressure
The purpose of the time varying characteristic of small pressure difference pulsation in power communication process.
The application method of the unstable pressure difference meter of high pressure of the utility model embodiment can include：
Low conductivity buffer solution and high conductivity manometric liquid are full of pressure-measuring pipe；
The pressure measurement seal of tube is followed by into High-Voltage Experimentation environment；
Open resistance instrument 2, resistance in monitoring pressure-measuring pipe；
Data acquisition process control system 3 is opened, the resistance that resistance instrument 2 is measured is converted into pressure difference.
Below again by taking Fig. 1 as an example, the user of the unstable pressure difference meter of high pressure for describing bright the utility model embodiment in detail is said
Method.As shown in figure 1, specific operation process can include：
Before the unstable pressure difference meter of high pressure is opened, four pressure-measuring pipe tops pass through pipeline and the first valve 10 respectively,
Second valve 11, the 3rd valve 12, the 4th valve 13, the 9th valve 18, the tenth valve 19, the 11st valve 20, the 16th valve
Door 26 is connected and accesses the second intermediate receptacle 28, and bottom is respectively by pipeline and the 5th valve 14, the 6th valve 15, the 7th valve
16, the 8th valve 17, the 12nd valve 21, the 13rd valve 22, the 14th valve 23, the 15th valve 25 is connected and accesses first
Intermediate receptacle 27.Open head end cut-in valve 1, the first valve 10, the second valve 11, the 3rd valve 12, the 4th valve 13, the 5th valve
Door 14, the 6th valve 15, the 7th valve 16, the 8th valve 17, the tenth valve 19, the 12nd valve 21, the 14th valve 23, tail
The end valve 26 of cut-in valve the 24, the 16th, the 18th valve 30 closes other valves.
After above-mentioned valve operation is completed, injection pump 31 is with certain flow rate constant current speed (0.1-1ml/min) by second
Between low conductivity buffer solution in container 28 be injected into pressure-measuring pipe to being completely filled with.
After being full of low conductivity buffer solution in pressure-measuring pipe, then the 5th valve 14 is opened, the 6th valve 15, the 7th valve 16,
8th valve 17, the 12nd valve 21, the 13rd valve 22, the 14th valve 23, the 15th valve 25, the 17th valve 29,
Close other valves.By high conductivity manometric liquid (such as water in the first intermediate receptacle 27 under the pressure effect of injection pump 31
Silver) pressure-measuring pipe is pumped at 1/2.
Adjust in concordant pressure-measuring pipe after high conductivity manometric liquid height, open head end cut-in valve 1, the first valve 10, second
Valve 11, the 3rd valve 12, the 4th valve 13, the 9th valve 18, the tenth valve 19, the 11st valve 20 closes other valves,
Head end cut-in valve 1 is connected into High-Voltage Experimentation environment head end.
After head end cut-in valve 1 accesses High-Voltage Experimentation environment head end, the 9th valve 18, the 11st valve 20, the 13rd are closed
The valve 25 of valve the 22, the 15th, the 16th valve 26, the 17th valve 29, the 18th valve 30 opens other valves, by tail
End cut-in valve 24 accesses the tail end of High-Voltage Experimentation environment.
Open resistance instrument 2 and data acquisition process control system 3 begins preparing for surveying record, monitoring resistor instrument 2 and data
The resistance variations of acquisition process control system 3, record resistance value, and conversion obtains pressure difference result.
High conductivity manometric liquid (such as mercury) is pumped into pressure-measuring pipe centre position, now the resistance of high conductivity manometric liquid
With the resistor coupled in parallel of low conductivity buffer solution.When there is atomic pressure difference, liquid level can be moved in pressure-measuring pipe, at arrival end
Pressure is higher, and two kinds of interfaces of the liquid of the electrical different densities of difference rise, and resistance value reduces, it is possible thereby to accurate identification
The interface of low conductivity buffer solution and high conductivity manometric liquid, the location of interface is drawn using resistance change, from
And be converted to pressure difference.
The check method of the unstable pressure difference meter of high pressure of the utility model embodiment, can be in normal pressure bar in embodiment
Part is connected in parallel using the visual U-tube of equivalent amount with the unstable pressure difference meter of the high pressure of the utility model embodiment, is kept
Tail end pressure is constant, while apply a series of different slight pressures to head end changing, records the height of the utility model embodiment
The liquid level change and micro-pressure-difference for pressing resistance data and visual U-tube that resistance instrument in unstable pressure difference meter shows change.
To realize precise calibration, visual U-tube can use length identical with the unstable pressure difference meter of the high pressure of the utility model embodiment
The lucite pipe of metric lattice.
In embodiment, can be shown according to the resistance instrument in the unstable pressure difference meter of the high pressure of the utility model embodiment
Resistance data and visual U-tube liquid level change and micro-pressure-difference change, return resistance-pressure difference between relation, set up
Standard straight-line, under normal pressure as shown in Figure 2 resistance-height (pressure difference) measurement calibration schematic diagram, can by resistance under condition of normal pressure-
Highly (micro-pressure-difference) measurement check result obtains standard straight-line formula：
P=-0.25456R+0.27242；
Wherein, P is micro-pressure-difference, and R is resistance.
Resistance when the standard straight-line formula can be used as the unstable pressure difference meter of the high pressure of the utility model embodiment-
The standard of pressure difference conversion relation.For the unstable pressure difference meter of the high pressure of the utility model embodiment, as long as from same size
Pressure-measuring pipe, pumping into the high conductivity pressure measurement liquid of same volume in pipe can carry out electricity with identical standard straight-line formula
Resistance-pressure difference converts.
In embodiment, the unstable pressure difference meter of high pressure of the utility model embodiment can utilize U-tube pressure measuring principle, adopt
With high pressure resistant insulation pipe as pressure-measuring pipe, by precision resistance instrument and data acquisition process control system display measurement pipe path
Resistance, so as to recognize the position of the different electrically liquid levels of two kinds of different densities, is thus calculated two kinds of different densities different electrically
The height of liquid level intersection, is converted into pressure difference data and shows and record.The high pressure of the utility model embodiment is non-steady in embodiment
The minimum precision for determining pressure difference meter can reach 2.5456 × 10-5MPa.
In sum, the unstable pressure difference meter of the high pressure of the utility model embodiment, can bear environmental pressure very high,
Reach the certainty of measurement requirement of micro-pressure-difference；The real-time monitoring of unstable micro-pressure-difference under condition of high voltage can be realized, and can be real-time
Pressure difference minor fluctuations in record experimentation.
The unstable pressure difference meter of high pressure of the utility model embodiment is applied to the unstable minute-pressure difference measurements of High-Voltage Experimentation,
It is particularly well-suited to the real-time measurement of Micro-flows and slight pressure pulsation in Seepage Experiment under hyperbaric environment.
Particular embodiments described above, has carried out entering one to the purpose of this utility model, technical scheme and beneficial effect
Step is described in detail, be should be understood that and be the foregoing is only specific embodiment of the utility model, is not used to limit this
The protection domain of utility model, it is all within spirit of the present utility model and principle, any modification for being made, equivalent, change
Enter, should be included within protection domain of the present utility model.
Claims (8)
1. the unstable pressure difference meter of a kind of high pressure, it is characterised in that including：
One group of vertical and connection pressure-measuring pipe, is connected by holding wire (4) with resistance instrument (2)；At resistance instrument (2) and data acquisition
Reason control system (3) connection；
Low conductivity buffer solution and high conductivity manometric liquid are full of in pressure-measuring pipe；Resistance instrument (2) is for measuring resistance in pressure-measuring pipe；
Data acquisition process control system (3) by the resistance that resistance instrument (2) is measured for being converted to pressure difference.
2. the unstable pressure difference meter of high pressure as claimed in claim 1, it is characterised in that B alloy wire (5) is preinstalled with pressure-measuring pipe.
3. the unstable pressure difference meter of high pressure as claimed in claim 1, it is characterised in that pressure measurement bore more than or equal to 1mm and
Less than or equal to 2mm；And/or, pressure measurement length of tube is more than or equal to 1.5m and less than or equal to 2m.
4. the unstable pressure difference meter of high pressure as claimed in claim 1, it is characterised in that low conductivity buffer solution is saturation chlorination
Sodium solution；And/or, high conductivity manometric liquid is mercury.
5. the unstable pressure difference meter of high pressure as claimed in claim 1, it is characterised in that also include：
The first intermediate receptacle (27) and the second intermediate receptacle (28) for being connected with pressure-measuring pipe respectively；First intermediate receptacle (27) is equipped with
High conductivity manometric liquid；Second intermediate receptacle (28) is equipped with low conductivity buffer solution；
The injection pump (31) for being connected with the first intermediate receptacle (27) and the second intermediate receptacle (28) respectively.
6. the unstable pressure difference meter of high pressure as claimed in claim 5, it is characterised in that injection pump (31) is high-pressure pump.
7. the unstable pressure difference meter of high pressure as described in any one of claim 1 to 6, it is characterised in that each pressure-measuring pipe is from beginning to end
Two ends set a valve respectively, then are connected with other pressure-measuring pipes by setting valvular intermediate line；First pressure-measuring pipe (6) head end
Head end cut-in valve (1) is additionally provided with pipeline, tail end cut-in valve (24) is additionally provided with last root pressure-measuring pipe (6) head end pipeline；It is first
End cut-in valve (1) is connected into High-Voltage Experimentation environment head end；Tail end cut-in valve (24) is connected into High-Voltage Experimentation environment tail end.
8. the unstable pressure difference meter of high pressure as claimed in claim 1, it is characterised in that the unstable pressure difference meter of high pressure is used
High-Voltage Experimentation below 100 MPas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621271482.5U CN206223347U (en) | 2016-11-24 | 2016-11-24 | The unstable pressure difference meter of high pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621271482.5U CN206223347U (en) | 2016-11-24 | 2016-11-24 | The unstable pressure difference meter of high pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206223347U true CN206223347U (en) | 2017-06-06 |
Family
ID=58791440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621271482.5U Withdrawn - After Issue CN206223347U (en) | 2016-11-24 | 2016-11-24 | The unstable pressure difference meter of high pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206223347U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441698A (en) * | 2016-11-24 | 2017-02-22 | 中国石油大学(北京) | High-pressure unsteady micro-differential-pressure meter and using and verifying method thereof |
-
2016
- 2016-11-24 CN CN201621271482.5U patent/CN206223347U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441698A (en) * | 2016-11-24 | 2017-02-22 | 中国石油大学(北京) | High-pressure unsteady micro-differential-pressure meter and using and verifying method thereof |
| CN106441698B (en) * | 2016-11-24 | 2018-04-27 | 中国石油大学(北京) | The unstable pressure difference meter of high pressure and its use and check method |
| US10094730B2 (en) | 2016-11-24 | 2018-10-09 | China University Of Petroleum-Beijing | High pressure dynamic micro differential pressure gauge, and methods for using and checking the same |
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