CN104929613A - Pressure-variable-free flowmeter - Google Patents
Pressure-variable-free flowmeter Download PDFInfo
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- CN104929613A CN104929613A CN201410105486.5A CN201410105486A CN104929613A CN 104929613 A CN104929613 A CN 104929613A CN 201410105486 A CN201410105486 A CN 201410105486A CN 104929613 A CN104929613 A CN 104929613A
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Abstract
The present invention provides a pressure-variable-free flowmeter. A flowmeter is capable of taking accurate metering provided that a pipe is filled with liquid and has a certain pressure. It is often very difficult to take accurate metering of the flow amount of a liquid if the flow speed is unstable and the pressure is unstable in an open channel state. The pressure-free variable flowmeter herein is composed of a buffering tank, a liquid level meter, a computer, a programmable controller, a speed regulation motor and a displacement pump, wherein the liquid level meter is mounted inside the buffering tank and is connected to the programmable controller and the computer via a lead for transmitting signals of liquid level, and the programmable controller is connected to the speed regulation motor via a lead and controls the rotation speed of the speed regulation motor via the signals of the liquid level meter, and the speed regulation motor is connected to the displacement pump and is disposed at an outlet of the buffering tank. The programmable controller regulates the rotation speed of the speed regulation motor to retain a certain liquid level inside the buffering tank. The computer can conduct conversion of instantaneous flow amount based on the rotation speed of the speed regulation motor.
Description
Technical field
The present invention relates to fluid flowmeter, especially a kind of nonsteady flow gauge with no pressure for liquid meter.
Background technology
Flowmeter only when pipeline full packages, have a certain pressure could accurate-metering, when flow velocity is unstable, pressure transient is in open channel state, be difficult to the flow of accurate-metering liquid.
patent of invention content
Flowmeter only when pipeline full packages, have a certain pressure could accurate-metering, when flow velocity is unstable, pressure transient is in open channel state, be difficult to the flow of accurate-metering liquid.As the flow of slurry outlet in oilfield drilling, be often change, in pipeline, liquid level fluctuating is indefinite, so be difficult to metering.But accurate-metering rate of discharge, can differentiate the situation of overflow and leakage in drilling process in time, prevent the accident of blowout and differential sticking from occurring.And for example the middle press filtration vector of drilling fluid is the filter loss of 30 minutes, generally only has several milliliters, flow little like this, does not have such flow meter at present.The flow measurement being low to moderate a few microlitre can be realized, for the superminiature flow measurement in the field such as scientific research and medical science by method of the present invention.
The invention provides a kind of nonsteady flow gauge with no pressure used for liquid meter.
For achieving the above object, the invention provides a kind of nonsteady flow gauge with no pressure used for liquid meter, be made up of surge tank, content gauge, computer, programmable logic controller, buncher, displacement pump.Wherein, content gauge is arranged on surge tank inside, be connected with programmable logic controller and computer by wire, transmit liquid level signal, programmable logic controller is connected with buncher by wire, control the rotating speed of buncher according to the signal of content gauge, buncher is connected on displacement pump, is positioned at the exit of surge tank.Keep the liquid level that surge tank is certain, according to the rotating speed of motor, computer can be scaled flow.See accompanying drawing 1.
The content gauge of equipment sets bit positions in advance, first pressure and the erratic liquid of flow flow in surge tank, when memory space arrives the bit positions of content gauge, buncher has a rotating speed, when flow velocity is fast, content gauge upwards floats, now the signal of telecommunication by wire transmission to computer controller, computer controller sends instruction to buncher, buncher then improves rotating speed, drive displacement pump, liquid level is declined, otherwise content gauge floats downwards when flow velocity is slow, now the signal of telecommunication by wire transmission to computer controller, computer controller sends instruction to buncher, buncher then reduces rotating speed, liquid level is made to increase, therefore in surge tank, maintain a constant liquid level always namely set bit positions in advance, flow large buncher rotating speed is high, flow little buncher rotating speed is slow, thus according to the rotating speed of buncher, instantaneous delivery can be shown by conversion computer.
Compared with prior art, the present invention has following characteristics:
The present invention has the advantages that to be in the fluid flow of open channel state under computer control by variable-ratio displacement pump Measurement accuracy flow velocity instability, pressure transient.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention;
Fig. 2 is example 1 schematic diagram of the present invention;
Fig. 3,4 is example 2 schematic diagram of the present invention.
Critical element symbol description is as follows:
1 surge tank 2 content gauge 3 programmable logic controller 4 computer
5 buncher 6 displacement pump 7 light source 8 floats
9 light resistor 10 stepper motor 11 plunger displacement pump 12 ultrasonic type liquid level sensors
Detailed description of the invention
In order to clearer statement the present invention, below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1 to Figure 3, the invention provides a kind of nonsteady flow gauge with no pressure used for liquid meter, be made up of surge tank, content gauge, computer controller, buncher, displacement pump.Wherein, content gauge is arranged on surge tank inside, be connected with programmable logic controller and computer by wire, transmit liquid level signal, programmable logic controller is connected with buncher by wire, control the rotating speed of buncher according to the signal of content gauge, buncher is connected on displacement pump, is positioned at the exit of surge tank.Keep the liquid level that surge tank is certain, according to the rotating speed of motor, computer can be scaled flow.See accompanying drawing 1.
Embodiment 1, as shown in Figure 2, is drilling fluids outlet flow analyzer, is made up of surge tank, content gauge, PLC, computer, frequency converter, adjustable speed motor, displacement pump.The rate of discharge of drilling fluid is generally 30-50L/s, when mud flow rate is large, content gauge upwards floats, now the signal of telecommunication by wire transmission to computer controller and PLC, computer controller sends instruction to frequency converter, frequency converter transmission signal is to buncher, buncher then improves rotating speed, drive displacement pump, liquid level is declined, otherwise a flow hour content gauge floats downwards, now the signal of telecommunication by wire transmission to computer controller, computer controller sends instruction to buncher, buncher then reduces rotating speed, liquid level is made to increase, therefore in surge tank, maintain a constant liquid level always, flow large buncher rotating speed is high, flow little buncher rotating speed is slow, thus can flow be measured according to the rotating speed of buncher.By setting, computer can show instantaneous delivery, and sends oil drilling real-time monitoring system to by WSN.
Embodiment 2, as shown in Figure 3, Figure 4, be the ultra micro flow measuring instrument of the online middle press filtration vector analyzer of drilling fluid, be made up of U-shaped transparent pipe surge tank, photoelectric sensing type content gauge (Fig. 3) or ultrasonic type liquid level sensor (Fig. 4), PLC, computer, stepper motor, Small Plunger Pump.The middle press filtration vector of drilling fluid is the filter loss of 30 minutes, generally only has several milliliters, and that is per minute only have tens microlitres, flow little does not like this have such flow meter at present, only have and realized by Small Plunger Pump, Small Plunger Pump completes a working cycles, can be as small as a few microlitre.For Fig. 3, when filter loss is large, float upwards floats, luminous flux is large, light resistor resistance diminishes, now the signal of telecommunication by wire transmission to computer controller and PLC, computer controller sends instruction to stepper motor driver, stepper motor then improves rotating speed, drive plunger displacement pump, liquid level is declined, otherwise a flow hour float floats downwards, luminous flux is little, light resistor resistance becomes large, now the signal of telecommunication by wire transmission to computer controller and PLC, computer controller sends instruction to stepper motor driver, stepper motor then reduces rotating speed, liquid level is made to increase, therefore in U-shaped transparent pipe surge tank, maintain a constant liquid level always, flow large buncher rotating speed is high, flow little buncher rotating speed is slow, thus can flow be measured according to the rotating speed of buncher.By setting, computer can show instantaneous delivery, and sends oil drilling real-time monitoring system to by WSN.The flow meter of Fig. 4, is ultrasonic type liquid level sensor, with ultrasonic measuring liquid level, indirectly controls motor speed.The flow measurement being low to moderate a few microlitre can be realized with the inventive method, can be used for the superminiature flow measurement in the field such as scientific research and medical science equally.
Be only specific embodiments of the invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (6)
1., for the nonsteady flow gauge with no pressure of liquid meter, it is characterized in that: be made up of surge tank, content gauge, computer, programmable logic controller, buncher, displacement pump.
2. surge tank part according to claim 1, is characterized in that: have liquid entrance, is not limited to square or taper etc.
3. content gauge part according to claim 1, is characterized in that: liquid level can be converted to the signal of telecommunication, but is not limited to float-ball type, ultrasonic wave, photosensor signal etc.
4. programmable logic controller part according to claim 1, it is characterized in that: it adopts the memory that can program, be used for storing the instruction of the operations such as actuating logic computing, sequential operation, timing, counting and arithmetical operation therein, and by digital or analog input and output, control various types of machinery or manufacturing process, but be not limited to PLC, single-chip microcomputer etc.
5. buncher part according to claim 1, is characterized in that: motor speed can adjust, but is not limited to frequency converter or stepper motor etc.
6. displacement pump part according to claim 1, it is characterized in that: rely on work package reciprocating or gyrations in the pump housing such as piston, plunger, barrier film, gear or blade, the volume of several working chambers in the pump housing is periodically changed, and alternately sucks and discharge the one of liquid
pump, but be not limited to plunger displacement pump or diaphragm pump etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410105486.5A CN104929613A (en) | 2014-03-21 | 2014-03-21 | Pressure-variable-free flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410105486.5A CN104929613A (en) | 2014-03-21 | 2014-03-21 | Pressure-variable-free flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104929613A true CN104929613A (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410105486.5A Pending CN104929613A (en) | 2014-03-21 | 2014-03-21 | Pressure-variable-free flowmeter |
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| CN (1) | CN104929613A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3963374A (en) * | 1972-10-24 | 1976-06-15 | Sullivan Robert E | Well pump control |
| CN1399177A (en) * | 2002-09-06 | 2003-02-26 | 阎华� | Direct liquid level controlling system with single-loop pump |
| CN101034078A (en) * | 2006-06-03 | 2007-09-12 | 东北电力大学 | Quick automatic evaluation device for scale inhibitor performance based on conductance detecting |
| CN201568741U (en) * | 2009-11-30 | 2010-09-01 | 蚌埠玻璃工业设计研究院 | Automatic ore pulp delivery unit |
| CN201802601U (en) * | 2010-07-22 | 2011-04-20 | 江西稀有金属钨业控股集团有限公司 | Variable-frequency control system of slurry pump |
| CN102230578A (en) * | 2011-05-26 | 2011-11-02 | 河海大学 | Double-pump multi-path high-precision filling device and control method thereof |
| CN102786390A (en) * | 2011-05-14 | 2012-11-21 | 如皋市双马化工有限公司 | Chemical industry glycerinated water concentration system |
| CN202793472U (en) * | 2012-07-09 | 2013-03-13 | 中国石油天然气股份有限公司 | Single-phase liquid micro-flow meter |
| US20130327520A1 (en) * | 2012-02-21 | 2013-12-12 | Production Sciences, Inc. | System and Method for Measuring Well Flow Rate |
-
2014
- 2014-03-21 CN CN201410105486.5A patent/CN104929613A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3963374A (en) * | 1972-10-24 | 1976-06-15 | Sullivan Robert E | Well pump control |
| CN1399177A (en) * | 2002-09-06 | 2003-02-26 | 阎华� | Direct liquid level controlling system with single-loop pump |
| CN101034078A (en) * | 2006-06-03 | 2007-09-12 | 东北电力大学 | Quick automatic evaluation device for scale inhibitor performance based on conductance detecting |
| CN201568741U (en) * | 2009-11-30 | 2010-09-01 | 蚌埠玻璃工业设计研究院 | Automatic ore pulp delivery unit |
| CN201802601U (en) * | 2010-07-22 | 2011-04-20 | 江西稀有金属钨业控股集团有限公司 | Variable-frequency control system of slurry pump |
| CN102786390A (en) * | 2011-05-14 | 2012-11-21 | 如皋市双马化工有限公司 | Chemical industry glycerinated water concentration system |
| CN102230578A (en) * | 2011-05-26 | 2011-11-02 | 河海大学 | Double-pump multi-path high-precision filling device and control method thereof |
| US20130327520A1 (en) * | 2012-02-21 | 2013-12-12 | Production Sciences, Inc. | System and Method for Measuring Well Flow Rate |
| CN202793472U (en) * | 2012-07-09 | 2013-03-13 | 中国石油天然气股份有限公司 | Single-phase liquid micro-flow meter |
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Application publication date: 20150923 |
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