CN105221912A - A kind of method of job site adjustment electronic flow switch - Google Patents
A kind of method of job site adjustment electronic flow switch Download PDFInfo
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- CN105221912A CN105221912A CN201510531867.4A CN201510531867A CN105221912A CN 105221912 A CN105221912 A CN 105221912A CN 201510531867 A CN201510531867 A CN 201510531867A CN 105221912 A CN105221912 A CN 105221912A
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Abstract
The invention discloses the method for a kind of job site adjustment electronic flow switch.Comprise the following steps: range ability and the operation instruction of understanding electronic flow switch; Know the adjustment direction requirement of electronic flow switch setting value; The in-site installation requirement of electronic flow switch; The inspection of electronic flow switch designs system; The difference of electronic flow switch is measured; The adjustment of electronic flow switch; Inspection adjustment result.Adjusted by electronic flow switch in this way, commissioning staff or the personnel being engaged in related work can easy to doly finish the work task, guarantee that the electronic flow switch adjusted meets design and technological requirement.Improve the working efficiency of adjustment, save time, energy saving, simple and convenient.
Description
Technical field
The present invention relates to the adjusting method of instrument in a kind of automatic control system, particularly a kind of method of job site adjustment electronic flow switch.
Background technique
Control in automatic control system, adjustment, chainly normally to be realized by all kinds of instrument, they form PID closed loop control system with electrical equipment in production process system, in order to realize the automation of production process.Therefore the adjustment work of instrumentation is most important.Electronic flow switch can be used as the bearing protector of the units such as all kinds of large-size machine, blower fan, steam turbine in the production of reality.The lubrication and cooling of unit bearing is all by lubricant oil; if fuel delivery is not enough, easily cause the dry friction of axle journal and bearing shell, cause and burn out the serious consequence such as bearing shell, unit judder; therefore, when set lubricant oil amount is down to design load, action protection compressor emergency shutdown answered by electronic flow switch.
Under normal conditions, traffic protection value has been demarcated in factory does not need to adjust again.But due to reasons such as transport, storage, installations, when even needing change designing requirement due to the factor of production technology physical condition, all need to carry out actual adjustment to the electronic flow switch of job site.Adjustment electronic flow switch needs the circulation loop of realistic installation, and measuring accuracy, and can the valve of fine adjustment in pipeline higher than the flowmeter of electronic flow switch, and the power source that can produce flow is as oil pump, water pump etc.In view of the complexity of above-mentioned measure loop, the diversity of equipment needed thereby, the system of as installed is selected in general adjustment.The switching state of contact is measured with multimeter.To height report switch, slowly open valve from low to high and observe multimeter, when multimeter is connected, the show value of flowmeter and high report value; Slowly closing valve again. when multimeter disconnects, the show value of flowmeter and reset values.To low report switch, first flow should be risen to more than setting value, then slowly closing valve, when multimeter is connected, flowmeter show value and low report value, more slowly open valve, and when multimeter disconnects, the show value of flowmeter and reset values.Can verify according to the method for the electronic flow switch adjusted, but if the electronic flow switch do not adjusted, such adjustment process will be too loaded down with trivial details.General method of measurement directly finds the design load of electronic flow switch, even do not have clear and definite adjustment direction, and such adjustment is easy to electronic flow switch to adjust disorderly.In a word, workload is big, job step is single and repeatability is many.Working efficiency is extremely low, and time and effort consuming is not said, job morale is easily passive.
Summary of the invention
In order to solve problems of the prior art, the invention provides the method for a kind of job site adjustment electronic flow switch, overcoming in prior art and adjust the problem that electronic flow switching process is loaded down with trivial details, workload is large.
Technological scheme of the present invention is:
A method for job site adjustment electronic flow switch, first records the working value hysteresis region of electronic flow switch by regulating valve by the flow value of pipeline, the setting value of the calculated value method adjustment electronic flow switch of recycling difference summation.
Specifically comprise the following steps:
(1) preliminary preparation of electronic flow switch adjustment;
(2) electronic flow switch designs system is checked: all opened by the valve before electronic flow switch, open oil pump and make oil circulation, observe the show value of flowmeter, because site technique requires different to the setting value of electronic flow switch, therefore piping flow must be greater than the action maximum value of electronic flow switch, otherwise design pipeline does not meet technological requirement, then electronic flow switch cannot adjust;
(3) difference of electronic flow switch is measured: general electronic flow switch is all placed in neutral position, and low alarm gets normally closed point; Turn on pump slowly increases valve opening augmented flow value, makes the normally closed disconnection of electronic flow switch, and records this value; Slowly reduce valve opening again thus reduce flow value, the recorded stream value again when the normally closed point of electronic flow switch closes, calculating the differences of two values;
(4) setting value of electronic flow switch is adjusted: regulate manually-operated gate aperture augmented flow, the show value of flowmeter is made to be setting value and difference sum, now unclamp locking nut, electronic flow switch is regulated to make normally closed point just be in off state, pin locking nut again, electronic flow switch-mode regulation is complete;
(5) inspection adjustment result: make oil pump out of service, the electronic flow switch motion when oil circuit flow is reduced to design load, operational outfit trips, and the debugging of electronic flow switch is complete.
The preliminary preparation of described step (1) electronic flow switch adjustment comprises the following steps:
(1) require range ability and the operation instruction of understanding electronic flow switch, designing requirement and technological requirement should be met;
(2) technological process and the adjustment direction requirement of design to electronic flow switch setting value is known; The adjustment direction of electronic flow switch has two classes, and a class is greater than a certain critical value for increasing direction of the traffic, regulates manually-operated gate aperture to make flow slowly be reduced to normal working, be more slowly increased to working value; Another kind of is be less than a certain critical value for reducing direction, is now slowly opened by manually-operated gate and makes flow value reach normal working, be more slowly reduced to working value; What actual use was more is Equations of The Second Kind, and when oil mass is reduced to a certain critical value, damaging bearing shell after avoiding non lubricant oil should shut down at once;
(3) in-site installation of electronic flow switch must meet instrumentation product technology documentation requirements.
Beneficial effect of the present invention is: adjusting method of the present invention solves in prior art the problem being difficult to adjust electronic flow switch, can realize to electronic flow switch scene adjustment integrity, operability, and can save a large amount of debug times, guarantee both quality and quantity complete debugging task.Adjusted by electronic flow switch in this way, commissioning staff or the personnel being engaged in related work can easy to doly finish the work task, guarantee that the electronic flow switch adjusted meets design and technological requirement.Improve the working efficiency of adjustment, save time, energy saving, simple and convenient.
Accompanying drawing explanation
Fig. 1 is the outline drawing of the electronic flow switch adjusted in the present invention;
Fig. 2 is the schematic diagram that the electronic flow switch adjusted in the present invention is connected with system.
Wherein:
1---flow switch tutorial light 2---regulation scale 3---locking nut
4---fuel tank 5---oil pump 6---regulating valves
7---flowmeter 8---electronic flow switch 9---oil pipes
10---motor bearings 11---connecting pipeline nut 12---connection plugs
13---installation direction indicates
Embodiment
Be described in further detail below in conjunction with the method for accompanying drawing to job site adjustment electronic type electronic flow switch of the present invention.
Electronic flow switch involved in adjustment method of the present invention is in certain project 2*240m2 sintering engineering, the low electronic flow switch causing main exhauster to shut down of the motor non-driven-end bearing oil mass that main exhauster uses.As shown in Figure 2.A fuel tank is included, an oil pump, a regulating valve, a flowmeter, an electronic flow switch, the pipeline of a bearing and connection whole system in concrete connection diagram of the present invention.
Relevant parameters involved in the present embodiment and process conditions as follows:
(1) oil pump is the threephase asynchronous of the Jiangsu Yuan Zhong Electric Co., Ltd selected.Model: Y3-100L1-4, power 2.2KW, rated current 4.78A, rotating speed 1410r/min, voltage 380V, efficiency 84.3%, frequency 50Hz, power-factor cos
connection: bifurcation (star-like).
(2) selected in the present invention electronic flow switch Type:FW20-020GJL015M1, Range:1 ~ 15L/min, PN:50bar.
(3) flow counts metal pipe float flow meter, model specification: LZZH-020s/R1/M4, range of flow: 120 ~ 1200L/h, precision: 2.5 grades.
A kind of concrete steps of job site adjustment electronic flow switch setting value are as follows:
Step one: require that the range ability understanding the electronic flow switch shown in Fig. 2 is 1-15L/min, meet the requirement of design setting value 9L/min.
Step 2: know technological process and the adjustment direction requirement of design to electronic flow switch setting value.When oil mass is reduced to a certain critical value, damaging bearing shell after avoiding non lubricant oil should shut down at once.
Step 3: the in-site installation of electronic flow switch must meet instrumentation product technology documentation requirements.The flow direction of surveyed liquid is clearly designated at electronic flow switch use arrow.
Step 4: inspection electronic flow switch designs system.Because site technique requires different to the setting value of electronic flow switch, therefore piping flow must be greater than the action maximum value of electronic flow switch.Flowmeter range selected in embodiment is 120-1200L/H, valve before electronic flow switch is all opened, open oil pump and make oil circulation, the show value observing flowmeter is 1100L/H, and this value is greater than maximum value 15L/min and the 900L/H of flow switch range.Design pipeline meets technological requirement, and electronic flow switch is adjustable.
Step 5: the difference of electronic flow switch is measured.General electronic flow switch is all placed in neutral position, and low alarm gets normally closed point.Turn on pump slowly increases valve opening augmented flow value, makes the normally closed disconnection of electronic flow switch, and record value 650L/H; Slowly reduce valve opening again thus reduce flow value, the recorded stream value 580L/H again when the normally closed point of electronic flow switch closes, the difference calculating two values is 70L/H.
Step 6: the setting value of adjustment electronic flow switch.Regulate manually-operated gate aperture augmented flow, make the show value of flowmeter be setting value and difference sum.Setting value is 9L/min and 540L/H, adds 70L/H, and the show value of flowmeter should be adjusted to 610L/H.Now unclamp locking nut, regulate electronic flow switch to make normally closed point just be in off state, then pin locking nut, electronic flow switch-mode regulation is complete.
Step 7: inspection adjustment result.Make oil pump out of service, the electronic flow switch motion when oil circuit flow is reduced to design load, operational outfit trips, and the debugging of electronic flow switch is complete.
Implementation result: adopt the present invention to adjust job site electronic flow switch, can increase work efficiency, shorten regulation time, determine setting value position fast and accurately, ensure that the adjustment work of electronic flow switch is effective fast, guarantee electronic flow switch use run time reliable and stable, the result simultaneously adjusted meets design requirement and technological requirement.Utilize workable, the easy grasp of adjusting method of the present invention, effect good, be convenient to promote.
Comprehensive above-described embodiment can be found out, the present invention is applicable to the field adjustable of electronic flow switch, as the adjustment etc. of the electronic flow switch in the adjustment of the electronic flow switch in high-rating generator, large blower.Although by reference to the accompanying drawings to invention has been foregoing description; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; when not departing from present inventive concept and claim institute protection domain, can also make a lot of distortion, these all belong to the row of protection of the present invention.
Claims (3)
1. the method for a job site adjustment electronic flow switch, it is characterized in that, first the flow value of pipeline is recorded the working value hysteresis region of electronic flow switch by regulating valve, the setting value of the calculated value method adjustment electronic flow switch of recycling difference summation.
2. job site adjusts the method for electronic flow switch according to claim 1, it is characterized in that, specifically comprises the following steps:
(1) preliminary preparation of electronic flow switch adjustment;
(2) electronic flow switch designs system is checked: all opened by the valve before electronic flow switch, open oil pump and make oil circulation, observe the show value of flowmeter, because site technique requires different to the setting value of electronic flow switch, therefore piping flow must be greater than the action maximum value of electronic flow switch, otherwise design pipeline does not meet technological requirement, then electronic flow switch cannot adjust;
(3) difference of electronic flow switch is measured: general electronic flow switch is all placed in neutral position, and low alarm gets normally closed point; Turn on pump slowly increases valve opening augmented flow value, makes the normally closed disconnection of electronic flow switch, and records this value; Slowly reduce valve opening again thus reduce flow value, the recorded stream value again when the normally closed point of electronic flow switch closes, calculating the differences of two values;
(4) setting value of electronic flow switch is adjusted: regulate manually-operated gate aperture augmented flow, the show value of flowmeter is made to be setting value and difference sum, now unclamp locking nut, electronic flow switch is regulated to make normally closed point just be in off state, pin locking nut again, electronic flow switch-mode regulation is complete;
(5) inspection adjustment result: make oil pump out of service, the electronic flow switch motion when oil circuit flow is reduced to design load, operational outfit trips, and the debugging of electronic flow switch is complete.
3. job site adjusts the method for electronic flow switch according to claim 2, it is characterized in that, the preliminary preparation of described step (1) electronic flow switch adjustment comprises the following steps:
(1) require range ability and the operation instruction of understanding electronic flow switch, designing requirement and technological requirement should be met;
(2) technological process and the adjustment direction requirement of design to electronic flow switch setting value is known; The adjustment direction of electronic flow switch has two classes, and a class is greater than a certain critical value for increasing direction of the traffic, regulates manually-operated gate aperture to make flow slowly be reduced to normal working, be more slowly increased to working value; Another kind of is be less than a certain critical value for reducing direction, is now slowly opened by manually-operated gate and makes flow value reach normal working, be more slowly reduced to working value; What actual use was more is Equations of The Second Kind, and when oil mass is reduced to a certain critical value, damaging bearing shell after avoiding non lubricant oil should shut down at once;
(3) in-site installation of electronic flow switch must meet instrumentation product technology documentation requirements.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510531867.4A CN105221912A (en) | 2015-08-26 | 2015-08-26 | A kind of method of job site adjustment electronic flow switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510531867.4A CN105221912A (en) | 2015-08-26 | 2015-08-26 | A kind of method of job site adjustment electronic flow switch |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2715753A1 (en) * | 1977-04-07 | 1978-10-19 | Ipt Inst Fuer Prueftechnik Ing | Pressure switch for controlling pressure regulator - has two photocells operated by shutter on pointer connected to Bourdon tube to prevent excessive pressure rise by closing magnetic valve |
| CN201653719U (en) * | 2010-02-11 | 2010-11-24 | 深圳市陆地方舟电动车有限公司 | Vacuum pressure switch debugging and detecting device |
| CN201698959U (en) * | 2010-02-08 | 2011-01-05 | 鞍钢股份有限公司 | Accurate adjusting device of mechanical pressure switch |
| CN201819700U (en) * | 2010-09-21 | 2011-05-04 | 长春轨道客车股份有限公司 | Pressure switch detecting and regulating device |
| CN202268303U (en) * | 2011-06-21 | 2012-06-06 | 上海凡宜科技电子有限公司 | High-pressure pressure switch adjusting device |
| CN103776626A (en) * | 2014-02-26 | 2014-05-07 | 天津二十冶建设有限公司 | Method for adjusting mechanical press switch |
-
2015
- 2015-08-26 CN CN201510531867.4A patent/CN105221912A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2715753A1 (en) * | 1977-04-07 | 1978-10-19 | Ipt Inst Fuer Prueftechnik Ing | Pressure switch for controlling pressure regulator - has two photocells operated by shutter on pointer connected to Bourdon tube to prevent excessive pressure rise by closing magnetic valve |
| CN201698959U (en) * | 2010-02-08 | 2011-01-05 | 鞍钢股份有限公司 | Accurate adjusting device of mechanical pressure switch |
| CN201653719U (en) * | 2010-02-11 | 2010-11-24 | 深圳市陆地方舟电动车有限公司 | Vacuum pressure switch debugging and detecting device |
| CN201819700U (en) * | 2010-09-21 | 2011-05-04 | 长春轨道客车股份有限公司 | Pressure switch detecting and regulating device |
| CN202268303U (en) * | 2011-06-21 | 2012-06-06 | 上海凡宜科技电子有限公司 | High-pressure pressure switch adjusting device |
| CN103776626A (en) * | 2014-02-26 | 2014-05-07 | 天津二十冶建设有限公司 | Method for adjusting mechanical press switch |
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Application publication date: 20160106 |
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