CN101135585A - Metal can viscous liquid flow voltage-stabilizing device - Google Patents

Metal can viscous liquid flow voltage-stabilizing device Download PDF

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Publication number
CN101135585A
CN101135585A CNA2007100183553A CN200710018355A CN101135585A CN 101135585 A CN101135585 A CN 101135585A CN A2007100183553 A CNA2007100183553 A CN A2007100183553A CN 200710018355 A CN200710018355 A CN 200710018355A CN 101135585 A CN101135585 A CN 101135585A
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China
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pressure
district
liquid flow
stabilizing device
viscous liquid
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CNA2007100183553A
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CN100468017C (en
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叶吉生
孙晓霞
沈政烈
胡沛敏
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LANZHOU WATER SUPPLY(GROUP) CO Ltd
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LANZHOU WATER SUPPLY(GROUP) CO Ltd
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Abstract

The metallic tank flow-stabilize and press-stabilizing device comprises a metallic tank, a metallic tank footing, a water inlet and water outlet. It feature the following: a metal container built in the metallic tank; a separator plate used for dividing the space into A, B areas; the A area is connected to the water inlet, and under the A area there is a over-measure control valve; the B area is connected to the water outlet, and above the B area there is gas phase and standard gas pressure tank; on the tank wall at outside of the B area there is a hydraulic pressure meter, a pressure meter or a pressure speed changer.

Description

Metal can viscous liquid flow voltage-stabilizing device
Technical field:
The present invention relates generally to liquid flow mearuement equipment, is specifically related to play when a kind of liquid flow mearuement instrument detects and calibrates the equipment of steady flow condition effect.
Background technology:
In the detection and calibration process of flow-meter, stablizing of flow is most important.Flow of liquid is crossed the volume flow value in a certain cross section Q v = 1 T ∫ 0 T q v ( t ) dt = V T , This shows, when in detection time, having only fluid stable to flow, can replace its instantaneous delivery value to be similar to the average flow value.
Traditional viscous liquid flow voltage-stabilizing device is 40～50 a meters high high-order water tower, utilizes deciding the high potential energy voltage stabilizing and controlling liquid level overflow current stabilization of high-order water tower.Because investment is many, taking up room is difficult for realizing greatly, restricts the development of development, detection and the calibration cause of flow instrument for many years.
The motion state of liquid in canister, the inventor has set up relevant mathematical model.As liquid repeatedly shunting in container, the math equation of bypass line Qi ( s ) = 1 Ri [ K + K 2 S ] Po ( S ) , Multiple pulse absorbs the math equation of pipeline Zi ( s ) = Ki Vi · S , Ki = Vi = dPa dVi , The math equation of water outlet calibrating pipeline behind the current stabilization Q 2 ( s ) = Pc ( s ) ( R 2 + L 2 S ) , And stable mathematics equation Pc ( s ) = ( R 2 + L 2 S ) R 3 · Po ( s ) · S α 0 S 4 + α 1 S 3 + α 2 S 2 + α 3 S + α 4 Deng, invented this viscous liquid flow voltage-stabilizing device according to math equation.
Summary of the invention:
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of metal can viscous liquid flow voltage-stabilizing device is provided, the stable the same device of the high-order water tower that plays the steady flow condition effect that it is stable and traditional, but its cost is 1/80～1/100 of a water tower voltage stabilization and current stabilization device, and taking up room is 1/50～1/80 of water tower voltage stabilization and current stabilization device.And flow and pressure controlling are flexible, are convenient to operation, realize easily.The canister viscous liquid flow voltage-stabilizing device is the support equipment of fluid flow standard set-up, is specifically designed to the detection of liquid flow mearuement instrument and the device that calibration the time plays the steady flow condition effect.
Purpose of the present invention can be by realizing by the following technical solutions: a kind of metal can viscous liquid flow voltage-stabilizing device, include canister (10), canister footing (2), water inlet (16), water delivering orifice (4), its principal feature is to be provided with the dividing plate (12) that canister (10) is divided into A, B zone in the canister (10), and the A district is connected with water inlet (16), and below, A district is provided with allowance adjusting control valve (17); The B district is connected with water delivering orifice (4), and top, B district is a gas phase, is connected with calibrating gas head tank (1), and the chamber wall in the outside, B district is provided with hydraulic pressure instrument (9), tensimeter or pressure transmission device (6).Liquid level instrument (9) shows the liquid level in the container body; Tensimeter or pressure transmission device (6), the pressure of measuring in the container changes, and force value is sent to pressure control unit (3) is the PI control module.The upper edge hole level of dividing plate is neat, according to being gas phase more than bead 30～50mm, below is liquid phase.
Described metal can viscous liquid flow voltage-stabilizing device is being provided with balance mark pressure-controlled valve (8), external source of the gas aeration valve (5) above the described B district and between the calibrating gas head tank (1), also be provided with pressure reduction control valve (7) in the jar above the B district, the orthobaric volume of calibrating gas head tank (1) is 0.1-0.2m 3, normal pressure is 0.4～0.8Mpa.Prescribe a time limit setting range under when the pressure that follow the tracks of to detect B district descends to being near the mark, open balance automatically and mark pressure-controlled valve (8), by external source of the gas aeration valve (5) to be higher than the tonifying Qi in container of normative reference air pressure; , open pressure reduction control valve (7) in the container automatically in limited time on the pressure rising of following the tracks of detection B district is near the mark setting range, the redundance gas that will be higher than normative reference air pressure is discharged tank body.When the air pressure in the calibrating gas head tank (1) is not enough, can open external source of the gas aeration valve (5), replenish calibrating gas head tank (1) internal gas pressure.
The A district of described metal can viscous liquid flow voltage-stabilizing device is by down from last kinetic energy force equalization mechanism (15), constant current constant voltage mechanism (14), the broken foam mechanism (13) that cools down that is provided with successively.
Described balance mark pressure-controlled valve (8), jar interior pressure reduction control valve (7), calibrating gas head tank (1) are controlled by pressure control unit (3).Pressure controlling unit (3), the normal pressure parameter of setting during according to various flows value and each the measurement, pressure controlling unit (3) follows the tracks of comparison and adjustment is marked pressure reduction control valve (7), allowance adjusting control valve (17) in pressure-controlled valve (8), the container, realizes the flow adjustment of being flowed to the B district in liquid fluctuating control and A district in the canister.The A district follows the tracks of adjustment to the level fluctuation amount of B district flow adjustment during mainly according to different detection flow Qmin, Qcom, Qmax.
Described kinetic energy force equalization mechanism (15) is to be provided with hole (15-2) on plate (15-1), and its below is provided with balance bob (15-3).
Described constant current constant voltage mechanism (14) is provided with inclined hole (14-2) on plate (14-1).
It is to be provided with hole (13-2) on plate (13-1) that described foam is eliminated mechanism (13).
Kinetic energy force equalization mechanism (15) is a straight hole flat board more than, and its aperture, hole count and pitch of holes all have direct relation with design discharge, hangs a plurality of balance bobs under the porous plate between the hole; Constant current constant voltage mechanism (14) is an inclined hole flat board more than, and the gradient of its aperture, hole count, every round and pitch of holes all have direct relation with the stability requirement of design discharge; The broken foam mechanism (13) that cools down is a straight hole flat board more than, its aperture, according to design discharge and working pressure, and generally at φ (3～5) mm, hole count only has relation with flow.Fore-and-aft distance and design discharge, stability requirement and water source way of supplying water that kinetic energy force equalization mechanism (15), constant current constant voltage mechanism (14) and broken foam are cooled down between the mechanism (13) have direct relation.
Described pressure control unit (3) is that the input end of microprocessor (3-4) is connected with input adjustment key (3-8); Load cell (3-1) connects the input end of microprocessor (3-4) by signal amplifier (3-2), analog-digital converter (3-3); The input end of microprocessor (3-4) also connects EEPROM (3-6); The output terminal of microprocessor (3-4) connects and statistics have shown (3-9), digital-analog converter (3-5), HART modulator-demodular unit (3-7); The output terminal of described digital-analog converter (3-5) is connected with HART modulator-demodular unit (3-7), current signal output end (3-10), power end (3-11)
Described canister can body (10) top is provided with safety valve (11).In case the too high modification scope that exceeds of pressure of supply water loses the constant current constant voltage effect.
The invention has the beneficial effects as follows: replaced traditional high-order water tower viscous liquid flow voltage-stabilizing device fully, obtained same stable flow field, realized the accurate detection of flow instrument instruments and meters.Except saving the investment significantly, flow and pressure controlling are flexible, are convenient to operation, build easily.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 a is a kinetic energy force equalization mechanism structural representation;
Fig. 2 b is the A-A cross-sectional schematic of Fig. 2 a;
Fig. 3 a is a constant current constant voltage mechanism structure synoptic diagram;
Fig. 3 b is the B-B cross-sectional schematic of Fig. 3 a;
Fig. 4 a is the broken foam mechanism structure synoptic diagram of cooling down;
Fig. 4 b is the C-C cross-sectional schematic of Fig. 4 a;
Fig. 5 is the schematic flow sheet of pressure control unit (3).
Embodiment:
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing:
Embodiment 1, see Fig. 1, a kind of metal can viscous liquid flow voltage-stabilizing device, include canister 10, canister footing 2, water inlet 16, water delivering orifice 4, be provided with the dividing plate 12 that canister 10 is divided into A, B zone in the canister 10, the A district is connected with water inlet 16, and below, A district is provided with allowance adjusting control valve 17; The B district is connected with water delivering orifice 4, and top, B district is a gas phase, is connected with calibrating gas head tank 1, and the chamber wall in the outside, B district is provided with hydraulic pressure instrument 9, tensimeter or pressure transmission device 6.The liquid level that liquid level instrument 9 shows in the container body; Tensimeter or pressure transmission device 6, the pressure of measuring in the container changes, and force value is sent to pressure control unit 3 is the PI control module., canister internal partition 12 has enough rigidity, and is indeformable in the constant current constant voltage process, do not tremble, and the upper edge hole level of dividing plate is neat, according to being gas phase more than bead 30～50mm, below is liquid phase.Being provided with balance mark pressure-controlled valve 8, external source of the gas aeration valve 5 above the described B district and between the calibrating gas head tank 1, above the B district, also be provided with pressure reduction control valve 7 in the jar.Prescribe a time limit setting range under when the pressure that follow the tracks of to detect B district descends to being near the mark, open balance automatically and mark pressure-controlled valve 8, by external source of the gas aeration valve 5 to be higher than the tonifying Qi in container of normative reference air pressure; , open pressure reduction control valve 7 in the container automatically in limited time on the pressure rising of following the tracks of detection B district is near the mark setting range, the redundance gas that will be higher than normative reference air pressure is discharged tank body.When the air pressure in the calibrating gas head tank 1 is not enough, can open external source of the gas aeration valve 5, replenish calibrating gas head tank 1 internal gas pressure.The orthobaric volume of calibrating gas head tank 1 is 0.1-0.2m3, and the normal pressure scope is 0.4～0.8Mpa, and calibrating gas head tank 1 is buried on the spot below 2 meters, to avoid the influence of environmental changes such as temperature, vibration to normal pressure.The A district is by down from last kinetic energy force equalization mechanism 15, constant current constant voltage mechanism 14, the broken foam mechanism 13 that cools down that is provided with successively.
Described balance mark pressure-controlled valve 8, jar interior pressure reduction control valve 7, calibrating gas head tank 1 are by pressure control unit 3 controls.Pressure controlling unit 3, the normal pressure parameter of setting during according to various flows value and each the measurement, pressure controlling unit 3 follows the tracks of comparison and adjustment is marked pressure reduction control valve 7, allowance adjusting control valve 17 in pressure-controlled valve 8, the container, realizes the flow adjustment of being flowed to the B district in liquid fluctuating control and A district in the canister.The A district follows the tracks of adjustment to the level fluctuation amount of B district flow adjustment during mainly according to different detection flow Qmin, Qcom, Qmax.
Canister can body 10 tops are provided with safety valve 11.
Embodiment 2, see Fig. 2, and kinetic energy force equalization mechanism 15 is to be provided with hole 15-2 on plate 15-1, and its below is provided with balance bob 15-3.
Embodiment 3, see Fig. 3, and constant current constant voltage mechanism 14 is provided with inclined hole 14-2 on plate 14-1.
Embodiment 4, see Fig. 4, and foam is eliminated mechanism 13 and be provided with hole 13-2 on plate 13-1.
Kinetic energy force equalization mechanism 15 is straight hole flat boards more than, and its aperture, hole count and pitch of holes all have direct relation with design discharge, hangs a plurality of balance bobs under the porous plate between the hole; Constant current constant voltage mechanism 14 is inclined hole flat boards more than, and the gradient of its aperture, hole count, every round and pitch of holes all have direct relation with the stability requirement of design discharge; The broken foam mechanism 13 that cools down is straight hole flat boards more than, its aperture, according to design discharge and working pressure, and generally at φ 3～5mm, hole count only has relation with flow.Fore-and-aft distance and design discharge, stability requirement and water source way of supplying water that kinetic energy force equalization mechanism 15, constant current constant voltage mechanism 14 and broken foam are cooled down between the mechanism 13 have direct relation.
Embodiment 5, see Fig. 5, and the input end that described pressure control unit 3 is microprocessor 3-4 is connected with input and adjusts key 3-8; Load cell 3-1 connects the input end of microprocessor 3-4 by signal amplifier 3-2, analog-digital converter 3-3; The input end of microprocessor 3-4 also connects EEPROM3-6; The output terminal of microprocessor 3-4 connects and statistics have shown 3-9, digital-analog converter 3-5, HART modulator-demodular unit 3-7; The output terminal of described digital-analog converter 3-5 is connected with HART modulator-demodular unit 3-7, current signal output end 3-10, power end 3-11.
The A district is most important to stablizing of the liquid in B district stream thickness stream field, in case certain testing conditions is determined, the standard pressure value in the established standards gaseous tension jar 1 at first, and this value inserted the PI control module, the level fluctuation scope that in PI control module input pod, allows of the precision of constant current constant voltage as requested simultaneously.When Qmin, generally be set in (49～98) Pa, (5～10) mmH 2O; When Qcom, generally be set in (98～196) Pa, (10～20) mmH 2O; When Qmax, generally be set in (196～392) Pa, (20～40) mmH 2O.

Claims (9)

1. metal can viscous liquid flow voltage-stabilizing device, include canister (10), canister footing (2), water inlet (16), water delivering orifice (4), it is characterized in that being provided with in the canister (10) dividing plate (12) that canister (10) is divided into A, B zone, the A district is connected with water inlet (16), and below, A district is provided with allowance adjusting control valve (17); The B district is connected with water delivering orifice (4), and top, B district is that gas phase is connected with calibrating gas head tank (1), and the chamber wall in the outside, B district is provided with hydraulic pressure instrument (9), tensimeter or pressure transmission device (6).
2. metal can viscous liquid flow voltage-stabilizing device as claimed in claim 1, it is characterized in that being provided with balance mark pressure-controlled valve (8), external source of the gas aeration valve (5) above the described B district and between the calibrating gas head tank (1), also be provided with pressure reduction control valve (7) in the jar above the B district, the orthobaric volume of calibrating gas head tank (1) is 0.1-0.2m 3, normal pressure is 0.4～0.8Mpa.
3. metal can viscous liquid flow voltage-stabilizing device as claimed in claim 1 or 2 is characterized in that described A district is by down from last kinetic energy force equalization mechanism (15), constant current constant voltage mechanism (14), the broken foam mechanism (13) that cools down that is provided with successively.
4. metal can viscous liquid flow voltage-stabilizing device as claimed in claim 3 is characterized in that pressure reduction control valve (7), calibrating gas head tank (1) are controlled by pressure control unit (3) in described balance mark pressure-controlled valve (8), the jar.
5. metal can viscous liquid flow voltage-stabilizing device as claimed in claim 3 is characterized in that described kinetic energy force equalization mechanism (15) is to be provided with hole (15-2) on plate (15-1), and its below is provided with balance bob (15-3).
6. metal can viscous liquid flow voltage-stabilizing device as claimed in claim 3 is characterized in that described constant current constant voltage mechanism (14) is provided with inclined hole (14-2) on plate (14-1).
7. metal can viscous liquid flow voltage-stabilizing device as claimed in claim 3 is characterized in that it is to be provided with hole (13-2) on plate (13-1) that described foam is eliminated mechanism (13).
8. metal can viscous liquid flow voltage-stabilizing device as claimed in claim 4 is characterized in that described pressure control unit (3) is that the input end of microprocessor (3-4) is connected with input and adjusts key (3-8); Load cell (3-1) connects the input end of microprocessor (3-4) by signal amplifier (3-2), analog-digital converter (3-3); The input end of microprocessor (3-4) also connects EEPROM (3-6); The output terminal of microprocessor (3-4) connects and statistics have shown (3-9), D-A converter (3-5), HART modulator-demodular unit (3-7); The output terminal of described D-A converter (3-5) is connected with HART modulator-demodular unit (3-7), current signal output end (3-10), power end (3-11)
9. metal can viscous liquid flow voltage-stabilizing device as claimed in claim 1 is characterized in that described canister can body (10) top is provided with safety valve (11).
CNB2007100183553A 2007-07-10 2007-07-10 Metal can viscous liquid flow voltage-stabilizing device Expired - Fee Related CN100468017C (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103411653A (en) * 2013-08-30 2013-11-27 福建恒劲科博测控技术有限公司 Calibration and detection device of liquid flow meter
CN103674343A (en) * 2013-12-10 2014-03-26 蒋韵坚 Voltage stabilization gas elimination tank for calorimeter calibrating device
CN108627220A (en) * 2018-02-07 2018-10-09 中国计量大学 A kind of stable-pressure device and its current stabilization method in water flow standard apparatus
CN108775949A (en) * 2018-07-12 2018-11-09 丹东意邦计量仪器仪表有限公司 A kind of voltage stabilizing fluid perseverance liquid level buffer system
CN112162482A (en) * 2020-10-30 2021-01-01 广州能源检测研究院 Intelligent combined optimization rectifying device and method suitable for complex flow field and application

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103411653A (en) * 2013-08-30 2013-11-27 福建恒劲科博测控技术有限公司 Calibration and detection device of liquid flow meter
CN103674343A (en) * 2013-12-10 2014-03-26 蒋韵坚 Voltage stabilization gas elimination tank for calorimeter calibrating device
CN108627220A (en) * 2018-02-07 2018-10-09 中国计量大学 A kind of stable-pressure device and its current stabilization method in water flow standard apparatus
CN108627220B (en) * 2018-02-07 2019-10-15 中国计量大学 A kind of stable-pressure device and its current stabilization method in water flow standard apparatus
CN108775949A (en) * 2018-07-12 2018-11-09 丹东意邦计量仪器仪表有限公司 A kind of voltage stabilizing fluid perseverance liquid level buffer system
CN112162482A (en) * 2020-10-30 2021-01-01 广州能源检测研究院 Intelligent combined optimization rectifying device and method suitable for complex flow field and application

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