CN204988600U - Static pressure constant current measuring device that jets in succession - Google Patents
Static pressure constant current measuring device that jets in succession Download PDFInfo
- Publication number
- CN204988600U CN204988600U CN201520456837.7U CN201520456837U CN204988600U CN 204988600 U CN204988600 U CN 204988600U CN 201520456837 U CN201520456837 U CN 201520456837U CN 204988600 U CN204988600 U CN 204988600U
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- Prior art keywords
- valve
- pressure transmitter
- constant current
- static pressure
- pressure
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- Expired - Fee Related
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Abstract
The utility model provides a static pressure constant current measuring device that jets in succession includes quick disconnect valve, air distributor and a plurality of parallelly connected measuring unit, quick disconnect valve and air distributor are connected, a plurality of parallelly connected measuring unit include flow indicator, intelligent miniature flow control valve, check valve in proper order, get press mouthful, pressure transmitter before the valve, the preceding pressure transmitter of valve passes through ball capable valve no. 2 and installs on air distributor, this static pressure constant current measuring device that jets in succession still includes pressure transmitter and PLC controller behind the valve, pressure transmitter passes through spherical valve no. 3 and is connected with the check valve behind the valve, the PLC controller respectively with the valve before behind the pressure transmitter, valve pressure transmitter, quick disconnect valve, intelligent miniature flow control valve be connected, the utility model discloses the static pressure is measured in succession, revises in real time, and measurement accuracy is high. Need not jet measuring device to the constant current and carry out the off -line check -up, the definite error size.
Description
Technical field
The utility model belongs to instrument measurement technical field, is specifically related to a kind of static pressure constant current and jets continuously measurement mechanism.
Background technology
Static pressure refers in fluid mechanics: 1. the pressure that produces when static of fluid; 2. the pressure perpendicular to fluid direction of motion of fluid generation when flowing; 3. the gauge pressure values do not recorded by flow rate effect in fluid.
By measuring static pressure, many-sided situations such as the distribution of static pressure container contents, the form of gas penetration potential and soft melt zone, process operation and dross position can be understood.If blast-furnace shaft static pressure is one of important parameter calculating blast furnace permeability resistance, and gas penetration potential resistance is the important evidence judging gas fluid distrbution in stove.Therefore, static pressure of furnace stack can be detected exactly continuously, just can know the working of a furnace ahead of time, take measures in time, control the direct motion of blast fumance, reach increase furnace processor, reduce the object of coke ratio.
The constant-flow air variable valve that traditional static pressure measurement system adopts, be in fact a self-operated type gas flow regulating valve, it is made up of needle valve, spinner-type flowmeter and membrane variable valve.Owing to being the gas flow regulating valve of self-operated type, its control accuracy is lower; Adopt self-operated type gas flow regulating valve to carry out static pressure measurement, regularly will carry out adjustment to constant-flow air variable valve, to ensure constant flux control precision.
Mainly there is following problem in therefore traditional static pressure measurement system:
Because static pressure measurement system adopts self-operated type gas flow regulating valve, its control accuracy is lower, and in stove, material easily enters pressure tappings, pressure tappings is blocked and causes measurement misalignment, have a strong impact on safety in production or cause great industrial accident.
1, accurate in order to ensure the measurement of static pressure measurement system, regularly need stop winding-up, carry out correction check and correction.
2, when fluctuation appears in spinner-type flowmeter float, illustrate that device cannot carry out constant current winding-up, parts replacement is frequent.
3, measuring error is comparatively large, can not correct response production actual conditions.
Utility model content
In order to solve the problems referred to above that prior art exists, the utility model provides a kind of static pressure constant current and to jet continuously measurement mechanism.
The technical scheme that the utility model adopts is: a kind of static pressure constant current is jetted measurement mechanism continuously, comprise the measuring unit of repid cut-off valve, gas distributor and multiple parallel connection, described repid cut-off valve is connected with gas distributor, the measuring unit of described multiple parallel connection comprises flow indicator, intelligent micro flow control valve, retaining valve, pressure tappings, upstream pressure transmitter successively, and described upstream pressure transmitter is arranged on gas distributor by the capable valve two of ball;
This static pressure constant current measurement mechanism of jetting continuously also comprises downstream pressure transmitter and PLC, and described downstream pressure transmitter is connected with retaining valve by spherical valve three; Described PLC is connected with upstream pressure transmitter, downstream pressure transmitter, repid cut-off valve, intelligent micro flow control valve respectively.
Further, the pipeline of described repid cut-off valve is provided with needle valve.
Further, the measuring unit of described multiple parallel connection is sealed by seal box.
The beneficial effects of the utility model are:
1, can static pressure continuous coverage, real-time correction, measuring accuracy is high.Do not need to carry out off-line verification to constant current winding-up measurement mechanism, determine error size.
2, by PLC, automatically controlling repid cut-off valve and open nitrogen-blow, while making wall pressure tapping carry out winding-up continuously, continuous coverage is carried out to static pressure, avoiding because determining compensating value or dredging pressure tappings, the problem that furnace wall static pressure measurement must interrupt.
3, in seal box, pass into trace nitrogen gas, keep pressure-fired in case, guarantee that static pressure constant current measurement mechanism of jetting continuously keeps clean for a long time, the measurement mechanism that static pressure constant current is jetted continuously may be used on any place of bad environments.
Accompanying drawing explanation
Fig. 1 is that a kind of static pressure constant current is jetted measurement mechanism structural representation continuously.
In figure: 1, repid cut-off valve; 2, gas distributor; 3, flow indicator; 4, intelligent micro flow control valve; 5, retaining valve; 6, downstream pressure transmitter; 7, upstream pressure transmitter; 8, PLC; 9, pressure tappings; 10, needle valve; 11, spherical valve one; 12, spherical valve 2 13, seal box; 14, measuring unit; 15, nitrogen inlet.
Embodiment
As shown in Figure 1, the utility model provides a kind of static pressure constant current and to jet continuously measurement mechanism, comprise the measuring unit 14 of repid cut-off valve 1, gas distributor 2 and multiple parallel connection, repid cut-off valve 1 is connected with gas distributor 2, the measuring unit 14 of multiple parallel connection comprises flow indicator 3, intelligent micro flow control valve 4, retaining valve 5, pressure tappings 9, upstream pressure transmitter 6 successively, and upstream pressure transmitter 6 is arranged on gas distributor 2 by the capable valve 2 11 of ball; This static pressure constant current measurement mechanism of jetting continuously also comprises downstream pressure transmitter 7 and PLC 8, and downstream pressure transmitter 7 is connected with retaining valve 5 by spherical valve 3 12; PLC 8 is connected with upstream pressure transmitter 6, downstream pressure transmitter 7, repid cut-off valve 1, intelligent micro flow control valve 4 respectively; The pipeline of repid cut-off valve 1 is provided with needle valve 10.The measuring unit of multiple parallel connection is sealed by seal box 13.
Open spherical valve 2 12, spherical valve 1, downstream pressure transmitter 6 and upstream pressure transmitter 7 are started working, and the pressure signal detected are changed into 4 ~ 20mA.DC current signal simultaneously and send into PLC 8; Control signal is sent by PLC 8, open repid cut-off valve 1, nitrogen enters gas distributor 2 by nitrogen inlet 15, flow indicator 3, intelligent micro flow control valve 4 and retaining valve 5 is entered again by pipeline, being blown into through pressure tappings 9 measures in tube wall, and now intelligent micro flow control valve 4 controls setting winding-up uninterrupted is 200L/min.
According to principle: when being blown into nitrogen in measurement tube wall, purge pressure P
blowwith static pressure P in furnace wall
quietdifference to purge flow rate and two surveys be between on-way resistance be directly proportional.That is:
P
blow-p
quiet=KZQ ... (1)
In formula: K-scale-up factor; Z-on-way resistance; Q-winding-up flow
P
quiet=P
blow-kZQ ... (2)
Winding-up flow Q is the control flow check value set by intelligent micro flow control valve 4;
Upstream pressure P is measured by upstream pressure transmitter 7
before, then measure downstream pressure P by downstream pressure transmitter 6
after, then on-way resistance:
Z=P
before-P
after(3)
When closing repid cut-off valve 1 and stopping winding-up, now downstream pressure transmitter 6 measures downstream pressure P
aftervalue is approximately equal to P
quietvalue, that is: P
quiet=P
after,
When opening repid cut-off valve 1 and starting winding-up measurement, now downstream pressure transmitter 6 measures downstream pressure P
aftervalue is P
blow;
Above measured value is all programmed by PLC 8, is calculated, and can determine the Proportional coefficient K of formula (1).
When static pressure constant current is jetted measurement continuously, P
quietget final product continuous coverage, and correction in real time calculates, reach the object accurately measuring static pressure.
According to the number of pressure point, gas distributor 2 continuous Integration can install multiple measuring unit 14, be suitable for static pressure of furnace stack measurement, furnace top pressure measurement, pressure box pressure survey, batch can pressure survey etc.
For guaranteeing seal box 13 cleaning inside, before repid cut-off valve 1, pipeline installs needle valve 10; During normal work, needle valve 10 is opened slightly, trace nitrogen gas is entered in seal box 13 by nitrogen inlet 15, make to keep pressure-fired in seal box 13, guarantee that seal box 13 keeps clean for a long time, the measurement mechanism that static pressure constant current is jetted continuously may be used on any place of bad environments.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection domain of the present utility model.
Claims (3)
1. a static pressure constant current is jetted measurement mechanism continuously, it is characterized in that: the measuring unit comprising repid cut-off valve (1), gas distributor (2) and multiple parallel connection, described repid cut-off valve (1) is connected with gas distributor (2), the measuring unit of described multiple parallel connection comprises flow indicator (3), intelligent micro flow control valve (4), retaining valve (5), pressure tappings (9), upstream pressure transmitter (6) successively, and described upstream pressure transmitter (6) is arranged on gas distributor (2) by the capable valve two (11) of ball;
This static pressure constant current measurement mechanism of jetting continuously also comprises downstream pressure transmitter (7) and PLC (8), and described downstream pressure transmitter (7) is connected with retaining valve (5) by spherical valve three (12); Described PLC (8) is connected with upstream pressure transmitter (6), downstream pressure transmitter (7), repid cut-off valve (1), intelligent micro flow control valve (4) respectively.
2. a kind of static pressure constant current according to claim 1 is jetted measurement mechanism continuously, it is characterized in that: the pipeline of described repid cut-off valve (1) is provided with needle valve (10).
3. a kind of static pressure constant current according to claim 1 is jetted measurement mechanism continuously, it is characterized in that: the measuring unit of described multiple parallel connection is by seal box (13) sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520456837.7U CN204988600U (en) | 2015-06-30 | 2015-06-30 | Static pressure constant current measuring device that jets in succession |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520456837.7U CN204988600U (en) | 2015-06-30 | 2015-06-30 | Static pressure constant current measuring device that jets in succession |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204988600U true CN204988600U (en) | 2016-01-20 |
Family
ID=55122958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520456837.7U Expired - Fee Related CN204988600U (en) | 2015-06-30 | 2015-06-30 | Static pressure constant current measuring device that jets in succession |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204988600U (en) |
-
2015
- 2015-06-30 CN CN201520456837.7U patent/CN204988600U/en not_active Expired - Fee Related
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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: 20160120 Termination date: 20160630 |