CN103088872A - Water supplying system for flow device - Google Patents

Water supplying system for flow device Download PDF

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Publication number
CN103088872A
CN103088872A CN2013100407403A CN201310040740A CN103088872A CN 103088872 A CN103088872 A CN 103088872A CN 2013100407403 A CN2013100407403 A CN 2013100407403A CN 201310040740 A CN201310040740 A CN 201310040740A CN 103088872 A CN103088872 A CN 103088872A
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China
Prior art keywords
water
controller
flow
water pump
pipeline
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Pending
Application number
CN2013100407403A
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Chinese (zh)
Inventor
孙立军
张涛
魏延兴
曹宇虹
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Tianjin University
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Tianjin University
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Priority to CN2013100407403A priority Critical patent/CN103088872A/en
Publication of CN103088872A publication Critical patent/CN103088872A/en
Pending legal-status Critical Current

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Abstract

The invention belongs to the field of flow detection and relates to a water supplying system for a flow device. The water supplying system comprises a water pump assembly, a water pump rotating speed measurement device, a pressure transmitter, a standard flow meter, a regulating valve, a bypass valve, a soft starter, a frequency converter and a controller. Detecting signals of the water pump rotating speed measurement device, the pressure transmitter and the standard flow meter are sent to the controller. The water pump assembly comprises at least two water pumps, one pump is controlled by the controller through the frequency converter, other water pumps are controlled by the controller through the soft starter, the water pumps are in parallel connection, the bypass valve is arranged on a bypass pipeline in parallel connection with the water pumps, and water supplied by the water pumps and the bypass valve flows into a detecting pipeline. The pressure transmitter, the regulating valve and the standard flow meter are arranged on the detecting pipeline. The water supplying system for the flow device has the advantages of being low in cost, small in occupied space and capable of meeting the precision requirement of a flow standard device.

Description

A kind of flow apparatus water system
Technical field
The present invention relates to field of flow detection, specially refer to a kind of water system of flow apparatus.
Background technology
Flow measurement requires to have high accuracy, high efficiency etc. as the important component part of national economy.Flow standard device guarantees that as the unified standard with transmitting of flux unit value the value of China each department and all departments is unified on a standard, for business accounting or arbitration work provide foundation.Therefore the discharge stability that improves flow standard device is significant.
High-order water tower is the comparatively desirable water source of flow standard device, and it provides the current of pressure stability, and the discharge stability in the calibrating pipeline can reach and be better than 0.06% level.But the water tower construction cost is high, take up room larger, and pressure head is limited.At present, flow apparatus often adopts the Frequency Converter Control water pump in conjunction with the water system of pressurizing vessel.This water system is practical more economically than water tower, and can pass through Frequency Converter Control pump rotary speed saves energy.At present, this water system generally only can reach 0.2% discharge stability level, compares with water tower and still has gap.And along with calibrating pipeline bore and flow increase, needed pressurizing vessel volume also increases, construction cost and the increase thereupon that takes up room.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, provide a kind of with low cost, take up room little, can meet the water system of the required precision of flow standard device.Technical scheme of the present invention is as follows:
A kind of flow apparatus water system comprises water pump group, pump rotary speed measurement mechanism, pressure transmitter, proving flowmeter, control valve, bypass valve, soft initiator, frequency converter and controller, wherein,
The detection signal of pump rotary speed measurement mechanism, pressure transmitter, proving flowmeter is admitted to controller;
Described water pump group comprises at least two water pumps, wherein one is by the water pump of controller by Frequency Converter Control, other water pump is controlled by soft initiator by controller, each water pump is in parallel, bypass valve is arranged on the bypass line in parallel with each water pump, water via water pump and bypass valve supply flows into the calibrating pipeline;
Described pressure transmitter, control valve and proving flowmeter are arranged on the calibrating pipeline, and controller is regulated pump rotary speed according to the force value that pressure transmitter detects by frequency converter, make line pressure be stabilized in the force value that calibrating needs; And according to the flow value of proving flowmeter, regulate the aperture of calibrating pipeline adjusted valve, thereby reach the flow value that the calibrating pipeline needs;
Controller is controlled the flow of bypass line by regulating the aperture of bypass valve, guarantees the steady switching of many water pumps.
As preferred embodiment, described water system also comprises the gas-removing filter that is arranged on the calibrating pipeline; Described water system also comprises and is arranged on the pipeline sluice valve that calibrating is upper and controlled by controller; Described pump rotary speed measurement mechanism is photoelectric encoder.
The invention has the advantages that:
1, in the situation that there is no water tower, there is no pressurizing vessel, based on the pump rotary speed closed loop feedback control, the power frequency operation pump rotary speed changes real-Time Compensation, flow apparatus is had is better than 0.1% discharge stability.
2, the calibrating flow process of water system and flow apparatus is controlled computer by the communication transmission of information, and it can independently be realized opening, stopping of self and move control, have higher independence.
3, in the time of both can having guaranteed meter proof, device has and is better than 0.1% discharge stability, in the time of can realizing meter proof again, between different flow point automatically, switch fast.
4, in the time of both can having guaranteed meter proof, device has and is better than 0.1% discharge stability, and when again can assurance device carrying out the calibrating of different flow point, water flow pressure is basic identical.
Description of drawings
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is the structural representation of one embodiment of the invention.
Description of drawings: drawing in figure has two kinds of dotted lines clearly, identifies respectively two class circuits.
The specific embodiment
Referring to Fig. 1, the present invention includes water pump group, frequency converter, soft initiator, speed probe, pressure transmitter, proving flowmeter, pipeline sluice valve, control valve, bypass valve, controller, display, gas-removing filter.
Operating principle of the present invention is as described below: the calibrating flow process of controller and device is controlled computer and is carried out communication, receives the calibrating flow process and controls the information that computer is sent, as parameters such as calibrating pipeline numbering, detective tube linear pressure, calibrating flow points; Controller is opened the pipeline sluice valve automatically, automatically selects the water pump in the water pump group, and controls its start-up course, according to the force value of calibrating pipeline upward pressure transmitter, regulates pump rotary speed by frequency converter, makes line pressure be stabilized in the force value that calibrating needs; Controller is regulated the aperture of calibrating pipeline adjusted valve according to the flow value of detective tube line standard flow meter, thereby reaches the flow value that the calibrating pipeline needs; Controller is controlled pump rotary speed by the operating frequency of regulating frequency converter and is kept constant according to the fluctuation situation of pump rotary speed, thus the discharge stability of control verification pipeline; Many water pump parallel connections, the water pump that a Frequency Converter Control is only arranged, during power frequency operation water pump that other is controlled for soft initiator, controller is according to the rotation speed change situation of power frequency operation water pump, regulate the water pump of Frequency Converter Control, its rotating speed is changed, thereby compensation power frequency operation pump rotary speed change the flowed fluctuation that produces, the discharge stability of assurance device; Display shows the operation conditions of water system in real time, as water pump start and stop state, rotating speed, frequency converter operating frequency, soft initiator state, the setting value of line pressure, flow, currency, pipeline control valve opening etc.; Controller is controlled the flow of bypass line by regulating the aperture of bypass valve, guarantees the steady switching of many water pumps, guarantees that water pump is in best operating point; Impurity in the gas-removing filter filtered water stream is eliminated the bubble in current, improves the clean level of current, makes mobile more steady.
If one embodiment of the present of invention are shown in Figure 2, the ultrasonic flow rate in Fig. 2 is counted tested flow meter:
1, water pump group is according to the range of flow 130m of flow apparatus 3/ h ~ 1800m 3/ h designs 3 90kW water pumps.
2,1 90kW frequency converter, 2 90kW soft initiators are controlled 3 water pump operations.3 photoelectric encoders detect respectively the rotating speed of every water pump.1 pressure transmitter is for detection of the pressure of water flow in pipeline.Select 0.2 grade of Electromagnetic Flow to count proving flowmeter.Control valve and bypass valve are selected electric butterfly valve, and the pipeline sluice valve is selected pneumatic ball valve.Select PLC as controller, liquid crystal touch screen is as display.The calibrating flow process of PLC and flow apparatus is controlled computer by 485 communication transmission of informations.
3, a cartridge type photoelectric encoder is arranged on the extension shaft of pump motor axle, in order to detect tach signal.The axle of extension shaft and pump motor is by being welded and fixed.
4, the photoelectric encoder output pulse signal, pass to PLC with rotary speed information.PLC according to the currency of pump rotary speed and setting value by suitable control program, the corresponding operating frequency value of calculating frequency converter.PLC is by 485 communication setting frequency converter frequency values.Can improve the speed stability of water pump by suitable control program, and then improve the discharge stability of device.

Claims (4)

1. a flow apparatus water system, comprise water pump group, pump rotary speed measurement mechanism, pressure transmitter, proving flowmeter, control valve, bypass valve, soft initiator, frequency converter and controller, wherein,
The detection signal of pump rotary speed measurement mechanism, pressure transmitter, proving flowmeter is admitted to controller;
Described water pump group comprises at least two water pumps, wherein one is by the water pump of controller by Frequency Converter Control, other water pump is controlled by soft initiator by controller, each water pump is in parallel, bypass valve is arranged on the bypass line in parallel with each water pump, water via water pump and bypass valve supply flows into the calibrating pipeline;
Described pressure transmitter, control valve and proving flowmeter are arranged on the calibrating pipeline, and controller is regulated pump rotary speed according to the force value that pressure transmitter detects by frequency converter, make line pressure be stabilized in the force value that calibrating needs; And according to the flow value of proving flowmeter, regulate the aperture of calibrating pipeline adjusted valve, thereby reach the flow value that the calibrating pipeline needs;
Controller is controlled the flow of bypass line by regulating the aperture of bypass valve, guarantees the steady switching of many water pumps.
2. flow apparatus water system according to claim 1, is characterized in that, described water system also comprises the gas-removing filter that is arranged on the calibrating pipeline.
3. flow apparatus water system according to claim 1, is characterized in that, described water system also comprises and is arranged on the pipeline sluice valve that calibrating is upper and controlled by controller.
4. flow apparatus water system according to claim 1, is characterized in that, described pump rotary speed measurement mechanism is photoelectric encoder.
CN2013100407403A 2013-02-01 2013-02-01 Water supplying system for flow device Pending CN103088872A (en)

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Application Number Priority Date Filing Date Title
CN2013100407403A CN103088872A (en) 2013-02-01 2013-02-01 Water supplying system for flow device

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CN2013100407403A CN103088872A (en) 2013-02-01 2013-02-01 Water supplying system for flow device

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104595222A (en) * 2014-11-13 2015-05-06 南昌大学 Fluid control system
CN104746567A (en) * 2015-04-03 2015-07-01 四川玉树科技(集团)有限公司 Water supply system pipeline frictional head loss compensation controller
CN105067155A (en) * 2015-08-14 2015-11-18 泉州七洋机电有限公司 Flow test device pressure and flow velocity double closed loop control system
CN105971864A (en) * 2016-07-05 2016-09-28 池泉 Pump set drive system
CN106908121A (en) * 2017-01-17 2017-06-30 北京远东仪表有限公司 A kind of flow apparatus reclaimed water discharge stability detection method and detecting system
CN107143492A (en) * 2017-07-20 2017-09-08 唐山国丰第二冷轧镀锌技术有限公司 The device and method of accurate control steel-making medium lift pump group hydraulic pressure flow
CN108671448A (en) * 2018-05-18 2018-10-19 中国矿业大学 It is a kind of to gather liquid-supplying system and operating method for fire fighting truck
CN109210381A (en) * 2018-11-02 2019-01-15 中国石油天然气集团公司 A kind of oil pipeline variable frequency pump combines regulator with regulating valve
CN109323128A (en) * 2018-11-02 2019-02-12 中国石油天然气集团公司 A kind of oil pipeline variable frequency pump combines pressure regulation method with regulating valve
CN111473842A (en) * 2020-04-26 2020-07-31 中国计量大学 Flow regulating method for water flow standard device
CN112031080A (en) * 2020-08-18 2020-12-04 成都锦胜雾森环保科技有限公司 Constant-pressure pump station with auxiliary flow regulation function and control method
CN114001803A (en) * 2021-09-09 2022-02-01 浙江浙能天然气运行有限公司 Bypass type natural gas flow automatic verification control system and control method thereof

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JP2001201391A (en) * 2000-01-19 2001-07-27 Tokiko Techno Kk Calibration system of flowmeter
CN201449297U (en) * 2008-12-29 2010-05-05 杭州展德软件技术有限公司 Simple high precision energy metering device
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CN201991035U (en) * 2010-11-10 2011-09-28 江苏淘镜有限公司 Constant current water supply apparatus
CN102383462A (en) * 2011-07-27 2012-03-21 苏州巴米特信息科技有限公司 Frequency conversion constant-pressure water supply system
CN202196292U (en) * 2011-08-30 2012-04-18 成都锐达自动控制有限公司 Hydropower station technical water supply intelligent control system
CN102435266A (en) * 2011-09-28 2012-05-02 中国计量科学研究院 Constant water head water supply system for flow measurement device
CN202370045U (en) * 2011-10-27 2012-08-08 山东电力工程咨询院有限公司 Firefighting water storage and water feeding intelligent control system of transformer substation
CN203080594U (en) * 2013-02-01 2013-07-24 天津大学 Water supply system for flow device

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Publication number Priority date Publication date Assignee Title
JP2001201391A (en) * 2000-01-19 2001-07-27 Tokiko Techno Kk Calibration system of flowmeter
CN201449297U (en) * 2008-12-29 2010-05-05 杭州展德软件技术有限公司 Simple high precision energy metering device
CN201464003U (en) * 2009-06-29 2010-05-12 中国计量学院 Rotor flow meter calibrating device
CN201991035U (en) * 2010-11-10 2011-09-28 江苏淘镜有限公司 Constant current water supply apparatus
CN102383462A (en) * 2011-07-27 2012-03-21 苏州巴米特信息科技有限公司 Frequency conversion constant-pressure water supply system
CN202196292U (en) * 2011-08-30 2012-04-18 成都锐达自动控制有限公司 Hydropower station technical water supply intelligent control system
CN102435266A (en) * 2011-09-28 2012-05-02 中国计量科学研究院 Constant water head water supply system for flow measurement device
CN202370045U (en) * 2011-10-27 2012-08-08 山东电力工程咨询院有限公司 Firefighting water storage and water feeding intelligent control system of transformer substation
CN203080594U (en) * 2013-02-01 2013-07-24 天津大学 Water supply system for flow device

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104595222A (en) * 2014-11-13 2015-05-06 南昌大学 Fluid control system
CN104746567A (en) * 2015-04-03 2015-07-01 四川玉树科技(集团)有限公司 Water supply system pipeline frictional head loss compensation controller
CN104746567B (en) * 2015-04-03 2016-08-17 四川玉树科技(集团)有限公司 Water system pipes frictional head loss compensating controller
CN105067155A (en) * 2015-08-14 2015-11-18 泉州七洋机电有限公司 Flow test device pressure and flow velocity double closed loop control system
CN105971864A (en) * 2016-07-05 2016-09-28 池泉 Pump set drive system
CN106908121B (en) * 2017-01-17 2019-05-21 北京远东仪表有限公司 Water flow Detection of Stability method and detection system in a kind of flow apparatus
CN106908121A (en) * 2017-01-17 2017-06-30 北京远东仪表有限公司 A kind of flow apparatus reclaimed water discharge stability detection method and detecting system
CN107143492A (en) * 2017-07-20 2017-09-08 唐山国丰第二冷轧镀锌技术有限公司 The device and method of accurate control steel-making medium lift pump group hydraulic pressure flow
CN107143492B (en) * 2017-07-20 2018-07-17 唐山国丰第二冷轧镀锌技术有限公司 Accurately control the device and method of steel-making medium lift pump group hydraulic pressure flow
CN108671448A (en) * 2018-05-18 2018-10-19 中国矿业大学 It is a kind of to gather liquid-supplying system and operating method for fire fighting truck
CN109323128A (en) * 2018-11-02 2019-02-12 中国石油天然气集团公司 A kind of oil pipeline variable frequency pump combines pressure regulation method with regulating valve
CN109210381A (en) * 2018-11-02 2019-01-15 中国石油天然气集团公司 A kind of oil pipeline variable frequency pump combines regulator with regulating valve
CN111473842A (en) * 2020-04-26 2020-07-31 中国计量大学 Flow regulating method for water flow standard device
CN111473842B (en) * 2020-04-26 2021-08-03 中国计量大学 Flow regulating method for water flow standard device
CN112031080A (en) * 2020-08-18 2020-12-04 成都锦胜雾森环保科技有限公司 Constant-pressure pump station with auxiliary flow regulation function and control method
CN112031080B (en) * 2020-08-18 2022-02-01 成都锦胜雾森环保科技有限公司 Control method of constant-pressure pump station with auxiliary flow regulation function
CN114001803A (en) * 2021-09-09 2022-02-01 浙江浙能天然气运行有限公司 Bypass type natural gas flow automatic verification control system and control method thereof
CN114001803B (en) * 2021-09-09 2024-02-27 国家管网集团浙江省天然气管网有限公司 Bypass type natural gas flow automatic verification control system and control method thereof

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Application publication date: 20130508