CN201637441U - Flow measurement device of high-pressure coal slurry plunger pump - Google Patents
Flow measurement device of high-pressure coal slurry plunger pump Download PDFInfo
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- CN201637441U CN201637441U CN2010201644376U CN201020164437U CN201637441U CN 201637441 U CN201637441 U CN 201637441U CN 2010201644376 U CN2010201644376 U CN 2010201644376U CN 201020164437 U CN201020164437 U CN 201020164437U CN 201637441 U CN201637441 U CN 201637441U
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- coal slurry
- displacement
- transducers
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Abstract
The utility model relates to a flow measurement device of a high-pressure coal slurry plunger pump. The coal slurry flow in coal slurry pipeline wet-method conveying is difficult to measure. The flow measurement device of the high-pressure coal slurry plunger pump comprises a data collecting and processing device, two pressure sensors, two pull-rod type displacement sensors and two approach switches. The data collecting and processing device comprises a shell which is internally provided with a data collecting module, a data processing module and a power module; a display screen is mounted on the surface of the shell; the two pressure sensors, the two displacement sensors and the two approach switches are connected with the data collecting module. The data collecting and processing device synchronously collects the pressure of a main cylinder of a hydraulic system and the displacement condition of the piston pull rod, simultaneously records the collecting time and processes the collected data according to the pressure variation so as to accurately determine the average coal slurry flow according to the relationship between the coal slurry flow of a system stroke and the time.
Description
Technical field
The utility model belongs to automatic field, relates to a kind of high pressure coal slime ram pump flow measurement device.
Background technology
The conveying of coal slime is the important step of coal slime fluidized bed feed process.The coal slime conveying technology of a new generation adopts the in-line pump feed technique to carry out wet method and carries.This technology is carried out technology such as removal of impurities, stirring, thin up and is carried out the multistep processing to coal slime, coal slime is done the pulping attitude carry out pipeline transportation.
After the coal slime that coal slime pipeline wet method conveying technology at first comes out the coal washery is handled, by scraper plate machine or other devices coal slime is sent into a bigger storage silo (middle warehouse) lining, adopt shuttle high-pressure plunger pump that coal slime is squeezed into pipeline then and carry.The flow metering of coal slime pipeline transportation is difficult to realize or measure very inaccurate in the real process.Because coal slime is squeezed into pipeline by reciprocating type high-pressure plunger pump, the piston push rod of high-pressure pump mainly relies on the vacuum suction that coal slime is sucked in the material cylinder, coal slime is that batch (-type) flows in pipeline, and because the unusual thickness of coal slime, water cut, physics change to flowability affects very greatly, cause the coal slime flow to be difficult to metering.
Present existing coal slime flow metering method mainly contains the metering method based on theoretical useful volume.The volumetric efficiency that this method provides according to coal slurrypump manufacturer, piston rod volume and reciprocating frequence calculate the coal slime flow.The result that this method obtains is often very big with actual deviation, particularly under some situation after reciprocating frequence increases, coal slime flow rate calculation value also increases sharply, but actual coal slime flow but obviously reduces.In order to overcome above shortcoming, often adopt the actual flow scaling method to determine actual volumetric efficiency in the real process, the experimental work amount of this method is bigger, and coal slime rerum natura, water cut, coal slime storehouse material level change more frequent, causes by the flow of reality demarcation also very inaccurate.Along with the raising of enterprise's production technology and environmental requirement, coal slime fluidized bed boiler need be realized burning and control automatically.At this time need the coal slime feeding coal is controlled, and the basis of control is will carry out flow accurately to detect that therefore, the needs of in the coal slime fluidized bed boiler fuel wet method feeding system coal slime flow accurately being measured are very urgent.
Summary of the invention
The purpose of this utility model is exactly at the deficiencies in the prior art, and a kind of flow measurement device that can accurately measure the coal slime pump discharge is provided.
The utility model comprises data acquisition and treating apparatus, two pressure transducers, two rod-pulling type displacement transducers, two near switch.
Data acquisition and treating apparatus comprise housing, are provided with data acquisition module, data processing module, power module in the housing, and surface of shell is equipped with display screen.Two pressure transducers, two displacement transducers and two all are connected with data acquisition module near switch.
Data acquisition and treating apparatus are gathered the displacement situation of hydraulic system master cylinder pressure and piston push rod simultaneously in the utility model, record acquisition time while, the data based pressure changing that collects is handled, according to system's stroke coal slime flow and time relation, just can accurately determine average coal slime flow.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of high pressure coal slime ram pump flow measurement device comprises data acquisition and treating apparatus, two pressure transducers 1, two displacement transducers 2, two near switch 3.
Data acquisition and treating apparatus comprise housing 4-1, are provided with data acquisition module, data processing module, power module in the housing, and housing 4-1 is equipped with display screen 4-2 in the surface.Two pressure transducers 1, two rod-pulling type displacement transducers 2 and two are connected with data acquisition module near switch equal 3.
The voltage signal that the current signal of 4～20mA that the current signal of 4～20mA that data collecting module collected No. 1 pressure transducer provides, 2 road rod-pulling type displacement transducers provide and 2 tunnel provides near switch.Wherein pressure and displacement signal collection period are 20～40ms, and just p.s., each sensor can be gathered 25 groups of data at least.Data processing module is used to handle pressure, displacement and the pairing data that collect.Power module is used for to data acquisition module and data processing module power supply, and display screen is used to show the coal slime flow.
Pressure transducer is the pressure transducer of standard signal, and measurement range is determined according to coal slime plunger pump liquid pressing system pressure limit, is 0～30Ma; Because being carried out pressure survey, the coal slime pipeline causes pressure transducer serious wear, factor such as stifled jail easily easily, the proportional relation of piston push rod pressure and hydraulic system pressure, be the gaging pressure situation of change, two pressure transducers link to each other with the pressure survey end of two main hydraulic oil respectively, are used to measure the pressure of main hydraulic system.
Displacement transducer is the rod-pulling type displacement transducer, and output signal is 4～20mA, and measurement range is determined according to the piston push rod stroke, is 0～1000mm.The gauge head of two rod-pulling type displacement transducers links to each other with two piston push rod piston head rear ends respectively, is used to measure the piston motion displacement.
Near switch is magnetic approach switch, is used for commutation in the hydraulic plunger pumping system, makes two piston push rods back and forth to move.Here be used for timing and processing pressure, displacement information near switch.
Data acquisition and treating apparatus are gathered the displacement situation of hydraulic system master cylinder pressure and piston push rod simultaneously, simultaneously the record acquisition time.The data based pressure changing that collects is handled, when pressure changes to time of about 85% of hydraulic system stabilization sub stage pressure as t from smaller value
1, and pressure is raise the quick time that descends suddenly rapidly as t
3, and the time before the rapid pressure fluctuation is as t
2According to system's stroke coal slime flow and time relation, calculate average coal slime flow value.
Claims (1)
1. high pressure coal slime ram pump flow measurement device comprises data acquisition and treating apparatus, two pressure transducers, two displacement transducers, two near switch; It is characterized in that:
Described data acquisition and treating apparatus comprise housing, are provided with data acquisition module, data processing module, power module in the housing, and surface of shell is equipped with display screen; Two pressure transducers, two displacement transducers and two all are connected with data acquisition module near switch;
Described pressure transducer is the standard signal pressure transducer, and measurement range is 0～30Ma, and two pressure transducers link to each other with the pressure survey end of two main hydraulic oil respectively, are used to measure the pressure of main hydraulic system;
Described displacement transducer is the rod-pulling type displacement transducer, and output signal is 4～20mA, and measurement range is 0～1000mm, and the gauge head of two rod-pulling type displacement transducers links to each other with two piston push rod piston head rear ends respectively, is used to measure the piston motion displacement;
Described is magnetic approach switch near switch, is used for commutation in the hydraulic plunger pumping system, makes two piston push rods back and forth to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201644376U CN201637441U (en) | 2010-04-20 | 2010-04-20 | Flow measurement device of high-pressure coal slurry plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201644376U CN201637441U (en) | 2010-04-20 | 2010-04-20 | Flow measurement device of high-pressure coal slurry plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201637441U true CN201637441U (en) | 2010-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201644376U Expired - Fee Related CN201637441U (en) | 2010-04-20 | 2010-04-20 | Flow measurement device of high-pressure coal slurry plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201637441U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004385A (en) * | 2015-04-21 | 2015-10-28 | 河北工程大学 | Paste pipeline transportation flow measuring method |
| CN108087229A (en) * | 2018-01-24 | 2018-05-29 | 兖州煤业股份有限公司 | A kind of coal slurrypump |
| CN108760576A (en) * | 2018-05-30 | 2018-11-06 | 碎得机械(北京)有限公司 | A kind of pipeline hazardous waste rheological behavior test system and detection method |
| CN109060389A (en) * | 2018-05-30 | 2018-12-21 | 碎得机械(北京)有限公司 | A kind of system and detection method detecting solid pump real time volume efficiency |
-
2010
- 2010-04-20 CN CN2010201644376U patent/CN201637441U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004385A (en) * | 2015-04-21 | 2015-10-28 | 河北工程大学 | Paste pipeline transportation flow measuring method |
| CN105004385B (en) * | 2015-04-21 | 2018-01-02 | 河北工程大学 | A kind of colliery lotion pipeline flow-measuring method |
| CN108087229A (en) * | 2018-01-24 | 2018-05-29 | 兖州煤业股份有限公司 | A kind of coal slurrypump |
| CN108760576A (en) * | 2018-05-30 | 2018-11-06 | 碎得机械(北京)有限公司 | A kind of pipeline hazardous waste rheological behavior test system and detection method |
| CN109060389A (en) * | 2018-05-30 | 2018-12-21 | 碎得机械(北京)有限公司 | A kind of system and detection method detecting solid pump real time volume efficiency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20130420 |