CN205773283U - A kind of frequency-changing pressure stabilizing automatic control hair oil production line - Google Patents
A kind of frequency-changing pressure stabilizing automatic control hair oil production line Download PDFInfo
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- CN205773283U CN205773283U CN201620492880.3U CN201620492880U CN205773283U CN 205773283 U CN205773283 U CN 205773283U CN 201620492880 U CN201620492880 U CN 201620492880U CN 205773283 U CN205773283 U CN 205773283U
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Abstract
This utility model relates to a kind of frequency-changing pressure stabilizing automatic control hair oil production line, including controller, converter, variable frequency pump, pressure transducer and hair oil crane position, described controller output end connects inverter input, controller input connects pressure transducer outfan, inverter output terminal connects the pump motor input of variable frequency pump, the pump motor outfan of variable frequency pump is according to the rotating speed of instruction regulation pump, oil product output is to hair oil crane position, variable frequency pump exit is provided with pressure detecting point, and pressure detecting point connects pressure transducer input.Advantage of the present utility model is embodied in: selection pressure controls to regulate pipeline flow size, by setting constant voltage value it is ensured that supply capability and oil filling riser quantity are in poised state, meets user's demand to hair oil amount rightly.
Description
Technical field
This utility model relates to product oil storage field automobile Oil Dispatching System, is specifically related to a kind of frequency-changing pressure stabilizing automatic control hair oil production line.
Background technology
For product oil storage field Oil Dispatching System, owing to entrucking oil filling riser quantity has uncertainty, hair oil amount is caused to be in a dynamic change procedure all the time, for the pipe-line system determined, the flow of tube fluid, pressure is continually changing, use constant speed pump hair oil, although valve transfer can be passed through or opens, termination of pumping controls ductwork pressure, but it is unable to maintain that pipe pressure is constant, constantly control valve, open, termination of pumping will appear from mechanical wear aggravation, plant maintenance workload increases, Loading precision is unsatisfactory for requirement, the problems such as water hammer effect is difficult to control to, not only increase energy consumption, and affect the service life of equipment, hair oil difficult quality guarantee.
Utility model content
The purpose of this utility model is for deficiency of the prior art, it is provided that a kind of frequency-changing pressure stabilizing automatic control hair oil production line, by the output frequency of variable frequency adjustment pump, it is achieved product oil storage field automatic control constant voltage hair oil.
For achieving the above object, the utility model discloses following technical scheme:
A kind of frequency-changing pressure stabilizing automatic control hair oil production line, including controller, converter, variable frequency pump, pressure transducer and hair oil crane position, described controller output end connects inverter input, controller input connects pressure transducer outfan, inverter output terminal connects the pump motor input of variable frequency pump, and the pump motor outfan of variable frequency pump is according to the rotating speed of instruction regulation pump, and oil product output is to hair oil crane position, variable frequency pump exit is provided with pressure detecting point, and pressure detecting point connects pressure transducer input.
Further, the quantity of described converter is at least one, and every converter is respectively connected with a variable frequency pump, and some variable frequency pumps form pump assembly.
Further, described some variable frequency pumps are installed in parallel.
Further, each the variable frequency pump exit described pump assembly outlet header being installed a pressure transmitter or pump assembly is mounted on a pressure transmitter.
Further, variable frequency pump is exported to that the pipeline on hair oil island is built on stilts to be laid.
Disclosed in this utility model, a kind of frequency-changing pressure stabilizing automatic control hair oil production line, has the advantages that
Oil Dispatching System is controlled, is to meet the oil filling riser demand to flow after all.So, flow is the basic controlling object of Oil Dispatching System.And the size of flow depends on lift, in view of under dynamically change operating mode, the size of pipeline pressure is the reflection of lift size, and between lift and hair oil ability and oil filling riser quantity, there is equilibrium relation, therefore, selection pressure controls to regulate pipeline flow size, by setting constant voltage value it is ensured that supply capability and oil filling riser quantity are in poised state, meets user's demand to hair oil amount rightly.
Accompanying drawing explanation
Fig. 1 is control principle block diagram of the present utility model,
Fig. 2 is the flowage structure schematic diagram of embodiment 1,
Fig. 3 is 6 crane position characteristic curve of pipeline figures,
Fig. 4 is the head curve figure that different hair oil operating mode is corresponding；
Fig. 5 is according to hair oil operating mode, chooses constant voltage setting value figure；
Fig. 6 is to join pump principle 1；
Fig. 7 is to join pump principle 2.
Detailed description of the invention
Below in conjunction with embodiment and referring to the drawings this utility model is further described.
Refer to Fig. 1.
A kind of frequency-changing pressure stabilizing automatic control hair oil production line, including controller, converter, variable frequency pump, pressure transducer and hair oil crane position, described controller output end connects inverter input, controller input connects pressure transducer outfan, inverter output terminal connects the pump motor input of variable frequency pump, and the pump motor outfan of variable frequency pump is according to the rotating speed of instruction regulation pump, and oil product output is to hair oil crane position, variable frequency pump exit is provided with pressure detecting point, and pressure detecting point connects pressure transducer input.
As a kind of improvement project, the quantity of described converter is at least one, and every converter is respectively connected with a variable frequency pump, and some variable frequency pumps form pump assembly.
As a kind of improvement project, described some variable frequency pumps are installed in parallel.
As a kind of improvement project, each the variable frequency pump exit that described pump assembly outlet header is installed a pressure transmitter or pump assembly is mounted on a pressure transmitter.
As a kind of improvement project, variable frequency pump is exported to that the pipeline on hair oil island (hair oil island is fuel charger region, refuel island be for the device of tank car charge of oil inside oil depot) is built on stilts to be laid.
Frequency-changing pressure stabilizing principle of automatic control is as follows:
Frequency-changing pressure stabilizing automatic control is that hair oil pump assembly outlet pressure is set to a certain steady state value；During hair oil operation, control system by monitoring ductwork pressure and is compared with constant voltage value, after the PID regulator computing that converter is built-in, and the output frequency of regulation pump, it is achieved the constant voltage hair oil of system.
Frequency-changing pressure stabilizing automatic control stability analysis:
Oil Dispatching System is controlled, is to meet the oil filling riser demand to flow after all.So, flow is the basic controlling object of Oil Dispatching System.And the size of flow depends on lift, in view of under dynamically change operating mode, the size of pipeline pressure is the reflection of lift size, and between lift and hair oil ability and oil filling riser quantity, there is equilibrium relation, therefore, selection pressure controls to regulate pipeline flow size, by setting constant voltage value it is ensured that supply capability and oil filling riser quantity are in poised state, meets user's demand to hair oil amount rightly.
Frequency-changing pressure stabilizing automatic interlock is analyzed:
1) using frequency-changing pressure stabilizing autocontrol mode hair oil, effusion meter is chain with electro hydraulic valve；Controller gathers flow signal, the regulation opening and closing of electro hydraulic valve and pressure reduction thus control hair oil amount, it is achieved quantifying and loading.
2) the operating point data under pump discharge pressure transmitter constantly gathers different hair oil operating mode, controller analog input end receives the analogue signal of sensor input, outfan output is after set-point with value of feedback comparison and processes the output signal drawn through PID, and according to this signal change regulation converter output frequency, thus control the frequency conversion of pump, it is achieved the constant voltage hair oil of system.Figure below is the control principle block diagram of frequency-changing pressure stabilizing automatic control Oil Dispatching System.
When mounted, variable frequency pump armored pump car requires centralized arrangement (being separately provided pump canopy/pump house) to this utility model；Oil filling riser quantity according to hair oil kind and correspondence, selects big pump (single-pump flow is not preferably greater than 400m/h) as far as possible；The pump of similar oil product (such as 93# gasoline), it is necessary to be installed in parallel；One pressure transmitter (during economic permission, can install a pressure transmitter at each pump discharge) is installed on pump assembly outlet header；Every pump configures the converter (not allowing one drag two) of a platform independent；The distance in pump offset hair oil district is unrestricted (freely can adjusting according to horizontal layout)；The process pipelines suggestion in pump district to hair oil district is built on stilts lays (avoiding soil corrosion, cause perforation leakage).
The design cycle of frequency-changing pressure stabilizing automatic system is as follows:
1) the typical characteristic curve of pipeline under different operating mode is drawn；
2) according to oil filling riser flow design value, the system pressure boundary that different entrucking operating mode is corresponding is determined；
3) according to the entrucking operating mode of regulation, determine system constant voltage value, and do operating mode Adaptability Analysis；
4) low-limit frequency allowed according to constant voltage setting value, single pump maximum stream flow restriction, pump, formulates and joins pump scheme.
Embodiment 1
See that Fig. 2, Fig. 2 are diesel oil 6 crane position automobile Oil Dispatching System.For many pumps for the loading system of many cranes position, along with opening pump number and the difference of entrucking oil filling riser number, will appear from organizing different characteristic curve of pipeline more.
In the present embodiment, quantifying and loading controller output end connects 1# converter, 2# inverter input respectively, quantifying and loading controller input connects pressure transducer (pressure transmitter) outfan, the outfan of 1# converter and 2# converter connects the pump motor input of 1# variable frequency pump and the pump motor input of 2# variable frequency pump respectively, the pump motor outfan of 1# variable frequency pump and 2# variable frequency pump is according to the rotating speed of instruction regulation pump, oil product output is to hair oil crane position, variable frequency pump exit is provided with pressure detecting point, and pressure detecting point connects pressure transducer input.Totally 6 crane position in the present embodiment, each variable frequency pump controls 3 crane positions respectively.Two variable frequency pumps connect oil tank respectively, and variable frequency pump is provided with effusion meter, electro hydraulic valve and filter with the process pipelines of hair oil crane position, and quantifying and loading controller passes through instrument control line connection traffic meter and electro hydraulic valve.
For a crane tube load, there are 6 characteristic curve of pipeline, for the entrucking simultaneously of 2 crane positions, then have 15 characteristic curve of pipeline.So-called typical case's characteristic curve of pipeline, when referring to out same number oil filling riser, that of characteristic curve steepest, see Fig. 3.
According to single crane tube load flow 100m3/ h considers, can draw 6 different pressure limits, see Fig. 4.The pressure limit of final which operating mode of selection is as system constant voltage setting value, in addition it is also necessary to combines actual entrucking operating mode and is analyzed.
See Fig. 5, it is assumed that the entrucking simultaneously of 2 crane positions is the common operating mode of Oil Dispatching System, then constant voltage value can be set as b value.
Frequency-changing pressure stabilizing automatic control Oil Dispatching System is to utilize pump discharge pressure transmitter to gather pressure signal and system constant voltage setting value comparison, and then produces output signal, then by Frequency Converter Control pump motor rotating speed, it is achieved variable-flow constant voltage hair oil.During whole constant voltage hair oil, choosing of pump is most important, the type selecting of reasonably optimizing pump and compound mode, can effectively reduce energy consumption, improves the operational efficiency of pump.
See Fig. 6, the matching principle of pump: first assume to there is a big pump, during power frequency operation, meet the flow (operating point 1) of 6 crane positions entrucking simultaneously after constant voltage sets；And this big pump is when working under allowing the low-limit frequency (usual little pump does not allow less than 30%) run, corresponding flow to meet the traffic requirement (operating point 2) during single oil filling riser hair oil.By consulting the correlated samples of pump, determining whether above-mentioned big pump exists, if not existing, then needing configuration, pump assembly is incompatible realizes many cranes position constant voltage hair oil.First, it is assumed that the power frequency curve in Fig. 6 is the characteristic curve (Fig. 7) after 2 pump power frequency parallel connections.Owing to 2 pump power frequency parallel connection curves are the most fixed, counter can push away single pump power frequency operation parameter, by consulting sample, whether confirmation form pump exists, if existing, then 2 parallels connection of pumps run and can meet constant voltage hair oil process；If not existing, continuing to increase parallel-connected pumps number of units, analyzing the most as stated above, requiring until meeting.
This utility model passes through variable frequency adjustment, it is achieved product oil storage field constant pressure self-controlled hair oil has practical significance.
The above is only preferred implementation of the present utility model, is not intended to limit；Should be understood that, although this utility model being described in detail with reference to the various embodiments described above, it will be understood by those within the art that, the technical scheme described in the various embodiments described above still can be modified by it, or the most some or all of technical characteristic is carried out equivalent；And these amendments and replacement, do not make the essence of corresponding technical scheme depart from the scope of this utility model each embodiment technical scheme.
Claims (5)
1. a frequency-changing pressure stabilizing automatic control hair oil production line, it is characterized in that, including controller, converter, variable frequency pump, pressure transducer and hair oil crane position, described controller output end connects inverter input, controller input connects pressure transducer outfan, inverter output terminal connects the pump motor input of variable frequency pump, the pump motor outfan of variable frequency pump is according to the rotating speed of instruction regulation pump, oil product output is to hair oil crane position, variable frequency pump exit is provided with pressure detecting point, and pressure detecting point connects pressure transducer input.
A kind of frequency-changing pressure stabilizing automatic control hair oil production line the most according to claim 1, it is characterised in that the quantity of described converter is at least one, every converter is respectively connected with a variable frequency pump, and some variable frequency pumps form pump assembly.
A kind of frequency-changing pressure stabilizing automatic control hair oil production line the most according to claim 2, it is characterised in that described some variable frequency pumps are installed in parallel.
A kind of frequency-changing pressure stabilizing automatic control hair oil production line the most according to claim 3, it is characterised in that each the variable frequency pump exit installing a pressure transmitter or pump assembly on described pump assembly outlet header is mounted on a pressure transmitter.
A kind of frequency-changing pressure stabilizing automatic control hair oil production line the most according to claim 1, it is characterised in that variable frequency pump is exported to that the pipeline on hair oil island is built on stilts to be laid.
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| CN201620492880.3U CN205773283U (en) | 2016-05-27 | 2016-05-27 | A kind of frequency-changing pressure stabilizing automatic control hair oil production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996460A (en) * | 2018-09-05 | 2018-12-14 | 广州联新机电设备有限公司 | Tank service truck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996460A (en) * | 2018-09-05 | 2018-12-14 | 广州联新机电设备有限公司 | Tank service truck |
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Effective date of registration: 20200921 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Address before: 062550 Hebei, Cangzhou, Renqiu, Jianshe Road Patentee before: CHINA PETROLEUM ENGINEERING Co.,Ltd. NORTH CHINA BRANCH |