CN201858996U - Ultrasonic flow meter system - Google Patents
Ultrasonic flow meter system Download PDFInfo
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- CN201858996U CN201858996U CN2010206131600U CN201020613160U CN201858996U CN 201858996 U CN201858996 U CN 201858996U CN 2010206131600 U CN2010206131600 U CN 2010206131600U CN 201020613160 U CN201020613160 U CN 201020613160U CN 201858996 U CN201858996 U CN 201858996U
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- flow meter
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- ultrasonic flow
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- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 14
- 239000010935 stainless steel Substances 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
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- 238000012544 monitoring process Methods 0.000 abstract description 10
- 238000012360 testing method Methods 0.000 abstract description 10
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
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- 238000005259 measurement Methods 0.000 description 7
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- 230000010354 integration Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012625 in-situ measurement Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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- 230000009466 transformation Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
An ultrasonic flow meter system belongs to the field of hydropower station flow meters. The system is characterized by sequentially comprising energy converters connected with terminal boxes by the aid of cables, the terminal boxes are connected with flow meter main units by the aid of cables, and the flow meter main units adopt multichannel ultrasonic flow meters. The energy converters are internally attached and adjustable, stainless steel tubes are sleeved on all cables of the energy converters and used for protecting the cables, and the stainless steel protecting tubes are fixed in two modes, namely the stainless steel protecting tubes are fixed onto a concrete tube wall by stainless steel tube clamps and expansion bolts, and fixed onto a steel tube wall in a welded mode. After the system is mounted, online monitoring for unit flow is realized, unit efficiency tests on a unit are realized, comprehensive characteristic curves can be drawn, favorable scientific evidence is provided for safety operation and optimal efficiency area for the unit, reliable judgment data are provided for future abnormity of the unit, and reliable decision-making basis is provided for future unit state maintenance.
Description
Technical field
The utility model relates to a kind of ultrasonic flow meter systems, belongs to flow metering field, power station.
Background technology
In order to effectively utilize limited waterpower resourses and to improve electric power supply, need assess accurately the efficiency characteristic of hydraulic generator unit, this just need carry out efficiency test.Effectively flow and efficiency test result are hydraulic turbine handing-over examination, optimization operation, scrap build assessment and the important evidence of formulating turnaround plan.So accurate flow measurement and absolute efficiency test are all wished to carry out in the power station, this in the world in recent ten years demand is in steady-state growth.
At present, formation gradually along with perfect and unit on-line monitoring and the repair based on condition of component system that have power plant's computer supervisory control system now, monitoring to unit flow and efficient needs urgent day by day, this helps the optimization operation of power plant and the accurate assessment of unit performance, for power plant reduces operating cost, guarantee that safety in production provides reliable scientific basis.So be necessary to realize the online absolute flow rate monitoring of power station unit.
Low head hydropower station occupies critical role in electric system, and considerable world-class large hydropower station all is the low water head type.Because operation is disturbed greatly between the fluidised form unit complicated and changeable, adjacent of low-head hydroelectric plant, make us be difficult to judge unit actual flow and efficient according to unit model test findings or gatage.Therefore it is necessary to develop the novel flow efficient in-situ measurement equipment that can be used for the low-head hydroelectric plant.
In for a long time, the absolute flow rate measuring technique that is used for the low-head hydroelectric plant only limits to current meter method.Because current meter method is on-line monitoring for a long time not only, and a large amount of mechanical type current meters to be installed during test in runner, need expend great amount of manpower and material resources, funds and time, in recent years seldom employing.
The utility model content
The purpose of this utility model is to propose a kind of ultrasonic flow meter systems, particularly at the defective of current meter method.
A kind of ultrasonic flow meter systems is characterized in that: comprise transducer successively, transducer is by cable splicing ear case, and terminal box is by cable flowmeter main frame; The flowmeter main frame adopts the multichannel ultrasonic flow meter.
A kind of ultrasonic flow meter systems is characterized in that: transducer adopts lining type scalable transducer.
A kind of ultrasonic flow meter systems; it is characterized in that: the cable of transducer all overlaps the stainless-steel tube protection; the fixedly employing dual mode of stainless steel pillar is fixed on the coagulation wall by stainless steel pipe clip and expansion bolt for concrete tube wall, adopts the mode of welding for steel pipe walls.
A kind of ultrasonic flow meter systems is characterized in that: main frame adopts 2 7510Plus type main frames, measures two runners respectively, through accumulation calculating, and the accumulation of monitoring total flow and final demonstration.After the utility model system installs, realize unit flow on-line monitoring, be implemented in the unit efficiency test, can draw combined characteristic, for unit safety operation and optimum efficiency district provide favourable scientific basis,, provide reliable judgment data for unusual condition appears in unit later on, when carrying out in the future the set state maintenance, provide reliable decision-making foundation.
Description of drawings
Fig. 1: ultrasonic flow meter system layout synoptic diagram
Fig. 2: ultrasonic flow meter system principle diagram
Among the figure: 1. transducer 101 left side runner transducers 102 right side runner transducers
2. cable; 3. runner; 4. current; 5. ultrasonic system main frame 501 main frames 1 502 main frames 2;
6. spiral case; 7. terminal box 701 left side terminal boxs 702 right side terminal boxs; 8. wearing cable device 801 wears cable device 1 802 and wears cable device 2 803 and wear cable device 3 804 and wear cable device 4; 9. telecommunication cable; 10. host computer.
Embodiment
Describe present embodiment in detail below in conjunction with Fig. 1.
The Bai Shanshui power station is positioned at upstream, master stream, second Song Hua River, 1,700,000 kilowatts of total installed capacities, and design average annual energy output 24.77 hundred million kilowatt hours, wherein: the power station is three 300,000 kilowatts of mixed-flow wheel genset under the white mountain region; Power station, Bai Shan left bank is two 300,000 kilowatts of mixed-flow wheel genset; 39 kilometers red stone power station is four 50,000 kilowatts axial fixed blade propeller water turbine formula hydraulic generator units apart from the Bai Shan downstream.In system, undertake peak regulation, frequency modulation, emergency duty effect.
Consider the complicacy of red stone power station water inlet flow channel, intend the multichannel ultrasonic flow meter of the 7510Plus series of employing U.S. ACCUSONIC company, this be because: ACCUSONIC company is a foremost in the world heavy caliber multichannel ultrasonic flow meter manufacturer, and its heavy caliber flowing meter that puts into operation is above 3000; ACCUSONIC company at first is used for ultrasonic flow meter the flow and the efficiency monitoring in power station, and applies (comprising tens large-scale and huge units) on hundreds of platform unit, and abundant achievement and successful experience are arranged; ACCUSONIC company has participated in drafting and formulating of American National Standard ASME PTC18 and the IEC41 of International Electrotechnical Commission rules, and its flowmeter meets international rules requirement fully; ACCUSONIC company uniquely in the world has the 18 sound travel ultrasonic flow meters that are used for the complicated fluidised form of large-scale power station, and puts into operation in a plurality of power stations and test; ACCUSONIC company is unique in the world company that has solved low water head unit flow efficient on-line monitoring with ultrasonic flow meter.
1.2, flowmeter main frame (electronic cabinet) configuration
The flowmeter host computer system is made of a 7510+C8 sound travel main frame and a 7510+B8 sound travel main frame, because red stone unit runner is the diplopore runner, therefore two machines are measured the water flow of two runners respectively, and carry out the final demonstration and the accumulation of total flow on 7510+C8 sound travel main frame.
1.3, the ultrasonic transducer type selecting
Consider that red stone unit water inlet flow channel is rectangular horn-like, the water inlet flow channel structure of this gradual change is installed to transducer and is proposed a challenge, therefore intends adopting ACCUSONIC company to aim at 7618 type lining type scalable transducers of the type runner design.This is a kind of transducer of spherical structure, can comprehensive up and down adjustment, and Installation and Debugging are very convenient, need not flat surface.The design of this transducer allows the sound travel direction parallel with the water (flow) direction of expectation along the runner top, can eliminate potential in rectification that vertical off-axis impacted.
1.4, transducer signal cable type selecting
Underwater portion is selected the two sheath water proof type signal cables of the special-purpose HDPE of ACCUSONIC for use, and this cable not only has the good signal transfer function, and the physical strength height, and water resistance is good, need not seal thereby make cable protecting tube only be used for mechanical protection, and installation is convenient.After guiding to outside the hole, can adopt homemade cable replacement according to fund state by connection terminal case to the signal cable of host machine part.
2, the flow measurement cross section place is selected
For red stone Power Plant, the flow measurement section is selected in the contraction section between main gate and the spiral case inlet section.
3, sound travel configuration
Red stone Water of Power Plant turbine is the unit diversion, and the water inlet and the draft tube of every unit are provided with dividing pier, so two water inlets and water delivering orifice are arranged.Is the gradual change contraction section from main gate to the mistake water flow passage the spiral case inlet section, and distance is very short.Therefore velocity flow profile is very inhomogeneous, and the change of flow state complexity is brought very big difficulty to flow measurement.For guaranteeing measuring accuracy, design adopts multi-paths ultrasound wave time difference measurement method to carry out flow measurement.Each runner of water inlet all adopts cross section 8 sound travels (4x4 sound travel array) to arrange, two runners amount to 16 sound travels.The elevation of every pair of intersection sound travel is arranged according to the spacing of " Gauss (Gaussian) " integration method requirement and is determined, will be applied in the digital integration of sound travel flow velocity to whole flow section the weighting coefficient that should arrange then.The Gauss integration technology is the flow integration method (for example IEC rules) of international relevant rules appointment, and the flow measurement for rectangular cross section provides sound travel to arrange elevation and relevant weight coefficient specially.According to the actual conditions at scene, when the import fluidised form distributes when may produce bigger variations, configurablely keep the flow measurement precision so that in the fluidised form distribution, obtain more sampled point than the more sound travel of 4x4 sound travel array.
4, transducer cable is drawn the path
The transducer signal cable causes the manhole place along the spiral case sidewall, has the position perforate welding that exposes tube wall to wear the cable device at the manhole place, and transducer cable is drawn by wearing the cable device, is connected to the terrain terminal box after drawing, and through terminal box signal cable is caused the flowmeter main frame again.
5, transducer installs and fixes mode
The lining type transducer is installed on the pedestal of special making, and pedestal is fixed on the concrete side walls of runner by the stainless steel expansion bolt.
6, cable protecting tube installs and fixes mode
In order to prevent that the transducer signal cable from being damaged by water impact; in current signal cable all overlap stainless-steel tube protection; because being installed, section part has concrete and two kinds of structural pipe walls of steel; therefore the fixing of stainless steel pillar need adopt dual mode; can be fixed on the coagulation wall by the stainless steel pipe clip and the expansion bolt of special making for concrete tube wall, can adopt the mode of welding that cable protection sleeve and pipe clamp are welded on the tube wall for steel pipe walls.Cable protecting tube only plays the mechanical protection effect, must not seal.
7, system configuration scheme
According to tested flow passage structure and field condition, this scheme adopts 2 shunt volume and total flows that 7510Plus type main frame comes 2 runners of on-line real time monitoring intakes of pumping station of U.S. Accusonic company; Transducer adopts 7618 type lining type scalable transducers.The sound travel of each runner arranges and all adopts intersection 8 sound travels that transducer cable is drawn by wearing the cable device.
When the utility model carried out runner replacing transformation at unit, the northeast DianKeYuan had carried out test figure collection checking, and efficiency curve checking result conforms to the rotary wheel model test, and flow conforms to rate of load condensate in the unit operation.
Claims (4)
1. ultrasonic flow meter systems is characterized in that: comprise transducer successively, transducer is by cable splicing ear case, and terminal box is by cable flowmeter main frame; The flowmeter main frame adopts the multichannel ultrasonic flow meter.
2. a kind of ultrasonic flow meter systems according to claim 1 is characterized in that: transducer adopts lining type scalable transducer.
3. a kind of ultrasonic flow meter systems according to claim 1; it is characterized in that: the cable of transducer all overlaps the stainless-steel tube protection; the fixedly employing dual mode of stainless steel pillar; be fixed on the coagulation wall by stainless steel pipe clip and expansion bolt for concrete tube wall, adopt the mode of welding for steel pipe walls.
4. a kind of ultrasonic flow meter systems according to claim 1 is characterized in that: main frame adopts 2 7510Plus type main frames to measure two runners respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206131600U CN201858996U (en) | 2010-11-19 | 2010-11-19 | Ultrasonic flow meter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206131600U CN201858996U (en) | 2010-11-19 | 2010-11-19 | Ultrasonic flow meter system |
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| Publication Number | Publication Date |
|---|---|
| CN201858996U true CN201858996U (en) | 2011-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206131600U Expired - Fee Related CN201858996U (en) | 2010-11-19 | 2010-11-19 | Ultrasonic flow meter system |
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| CN (1) | CN201858996U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092229A (en) * | 2016-06-16 | 2016-11-09 | 浙江大学 | Useful signal Blind extracting method and apparatus for ultrasonic gas flowmeter |
-
2010
- 2010-11-19 CN CN2010206131600U patent/CN201858996U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092229A (en) * | 2016-06-16 | 2016-11-09 | 浙江大学 | Useful signal Blind extracting method and apparatus for ultrasonic gas flowmeter |
| CN106092229B (en) * | 2016-06-16 | 2018-12-04 | 浙江大学 | For the useful signal Blind extracting method and apparatus of ultrasonic gas flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. STATE GRID XINYUAN HYDROE Effective date: 20130124 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130124 Address after: 132400 Baishan power plant, 274 Huadian Avenue, Jilin, Huadian Patentee after: Baishan Power Plant Patentee after: State Grid Corporation of China Patentee after: State Grid Xinyuan Hydropower Co., Ltd. Address before: 132400 Baishan power plant, 274 Huadian Avenue, Jilin, Huadian Patentee before: Baishan Power Plant |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20171107 Address after: 132000 Jilin Jilin Huadian Baishan town production complex building Co-patentee after: State Grid Corporation of China Patentee after: Songhua River hydropower generation Co., Ltd. Jilin Baishan power plant Co-patentee after: State Grid Xinyuan Hydropower Co., Ltd. Address before: 132400 Baishan power plant, 274 Huadian Avenue, Jilin, Huadian Co-patentee before: State Grid Corporation of China Patentee before: Baishan Power Plant Co-patentee before: State Grid Xinyuan Hydropower Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20191119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |