CN204753537U - Damped impedance formula regulator - Google Patents
Damped impedance formula regulator Download PDFInfo
- Publication number
- CN204753537U CN204753537U CN201520460881.5U CN201520460881U CN204753537U CN 204753537 U CN204753537 U CN 204753537U CN 201520460881 U CN201520460881 U CN 201520460881U CN 204753537 U CN204753537 U CN 204753537U
- Authority
- CN
- China
- Prior art keywords
- surge
- chamber
- damping
- water
- damping ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The utility model discloses a damped impedance formula regulator. Including the leading water pipe and with the surge -chamber of atmosphere UNICOM, the surge -chamber bottom is through connecting water course and leading water pipe UNICOM, has mobilizable damping ball in connecting the water course, the damping ball has damping spring limit control, it has the support frame to connect water course both ends face, and two support frame centers are fixed with along connecting the support slide bar that the vertical center of water course set up, support the slide bar and pass damping ball center, and the both ends face has the damping spring about the damping ball. The utility model designs a can two -way accent area and the impedance drill way of damping coefficient size, it has a function that the surge -chamber reduces the water hammer pressure, improves unit running behaviour, advantage that again can make full use of throttled surge chamber. Model test proves that the device can play the effect of " water hammer rupture disk ", can reduce pipeline under pressure's water hammer pressure, reduces the highest bore water level of surge -chamber, increases the minimum bore water level of surge -chamber, has improved the operational safety of surge -chamber.
Description
Technical field
The utility model belongs to hydropower system engineering and System design technology thereof, and conveying fluid line system equipment technical field, especially belongs to pipeline protecting water hammer design field, is specifically related to a kind of damped impedance formula regulator.
Background technology
In water conveying technology field, the impact of pipeline water hammer on pipeline and relevant device can not be ignored.
The regulator in power station is modal both at home and abroad is at present exactly adopt various forms of surge-chamber, and the regulator of industrial pipeline and pumping station system adopts compensator or pressure regulator valve mostly.
The design and use of hydraulic power plant surge-chamber are quite ripe and general, conventional surge-chamber has simple-type, impedance type, water-chamber-type also to claim two chamber, differential type, air-cushion type, overflow-type etc., the surge-chamber of these forms through the research of decades and use, its theoretical and design experiences suitable maturation.Wherein throttled surge chamber is a kind of structural approach of maturation, and in throttled surge chamber structure, the form of structure that the damping mouth of pipe is designed to plate-turning door once had report.
The principle of " water hammer rupture disk " is at the weakest position, Design of Pressure Piping one place, be rupturable diaphragm after a kind of pressurized is installed, after pressure conduit is subject to water hammer pressure, rupture of diaphragm earial drainage, thus limiting the rising of water hammer pressure, the shortcoming of water hammer rupture disk needs after breaking again to change, and will consider the impact of earial drainage, so except indivedual small hydropower station, there be limited evidence currently of uses.
Summary of the invention
The utility model discloses a kind of damped impedance formula regulator according to the deficiencies in the prior art.Problem to be solved in the utility model is to provide the regulator of a kind of automatic adjustment damper tube open area and damping, and the utility model device, except can be applicable to power station, also can be applied to the protecting water hammer design of industrial piping system.
The utility model is achieved through the following technical solutions:
Impedance type damping regulator, comprises aqueduct and the surge-chamber with atmosphere, it is characterized in that: by successive watercourse and aqueduct UNICOM bottom described surge-chamber, have moveable damping ball in successive watercourse, and damping ball has the spacing control of damping spring.
Described successive watercourse both ends of the surface have bracing frame, and two bracing frame centers are fixed with the supporting slider arranged along successive watercourse longitudinal center, and supporting slider is through damping ball center, and the upper and lower both ends of the surface of damping ball have damping spring.
Organize Buddhist nun's pipe diameter in the middle part of described successive watercourse be less than expander and lower subordinate's enlarged diameter tube on top and be symmetrical arranged up and down.
Described upper and lower two damping springs are separately fixed on the bracing frame of both ends of the surface, and damping spring contacts with damping ball contact jaw is separable or is fixedly connected with.
The ratio of described damper tube diameter and upper and lower enlarged diameter tube is 0.7 ~ 0.8.Optimal proportion is 0.707.
The bracing frame of described successive watercourse both ends of the surface is the cross bracing frames arranged along water channel radial direction.
The critical function of hydraulic power plant surge-chamber is exactly the water hammer pressure reducing pressure pipeline, and improve the runnability of unit, the utility model can retain the function of surge-chamber, reduces again the bore water level of surge-chamber as far as possible.Conventional surge-chamber is the condition relying on certain damper tube open area to ensure to reflect water soot blower, reach the object reducing water hammer pressure, in " hydraulic power plant surge-chamber design specifications ", suggestion damping hole open area can not be less than 15% of derivation conduit area bottom surge-chamber.From the correlation technique of hydraulic power plant surge-chamber, damping hole open area is relevant with water-level fluctuation amplitude, and damping hole open area less water-level fluctuation amplitude is less, but the less water hammer pressure of damping hole open area again can be larger.Therefore, wish that the condition reflecting water soot blower is good, water hammer pressure is little, wish that again surge-chamber water-level fluctuation amplitude is little simultaneously, from the viewpoint of the requirement to water hammer pressure and the control overflow two to Methods of Oscillation in Surge Chambers water level, be contrary to the area requirements in damping aperture, reduce water hammer pressure and require large orifice area, reduce water-level fluctuation amplitude and require microstome area.The utility model is in order to solve above-mentioned contradiction, based on the principle of " water hammer rupture disk ", to " reduce water hammer pressure to require " and give damping ball and spring to realize, and utilize surge-chamber water-level fluctuation rule to be the characteristic that sinusoidal decay fluctuates, have studied the changes in flow rate rule of turnover surge-chamber, rely on the displacement of damping ball under effect of water pressure, constantly blockade in surge-chamber the fluctuating procession of the water level and decontrol damping aperture, reach and automatically change damping hole open area and the object adjusting damping, thus well solve this to contradiction.
The utility model impedance type regulator operating principle is as follows:
When surge-chamber normally runs, the no matter initial launch water level height of surge-chamber, as long as constant duty, the flow of turnover surge-chamber is zero, and damping ball is always positioned at damper tube middle position, and the area of most of damping mouth of pipe is lived in block.After turbine-generator units abandons load, guide vanes of water turbine is closed, and force pipe pressure raises, surge-chamber base pressure raises, current direction flows, current direction pushes damping ball open, damper tube is opened, prevent water hammer pressure from raising further, and compress upper spring, lower spring can be motionless, and now damping ball is arranged in expander, when current enter surge-chamber, damping ball forms fluid resistance, constrains surge-chamber water level and raises.Along with the flow upwards flowed in surge-chamber reduces, water pressure reduces, and under the effect of upper spring, damping ball is slowly replied in middle damper tube, and damper tube open area reduces, further the top surge water level of restriction surge-chamber.When unit increases load, penstock pressure reduces, and surge-chamber base pressure reduces, current are flowed downward by surge-chamber, push damping ball open under current direction, and damper tube can be opened equally, prevent water hammer pressure from reducing further, and compress lower spring, upper spring can be motionless, now damping ball is arranged in lower expander, flow out surge-chamber under current direction, damping ball forms fluid resistance equally, and the water level of restriction surge-chamber reduces, thereafter, under lower spring effect, damping ball is returned to centre position again.Therefore this design can two-way function, and reduce water-level fluctuation amplitude than the surge-chamber of identical damping hole area, surge-chamber top surge water level reduces greatly, can reduce the height of surge-chamber, saves the engineering quantity of surge-chamber.The minimum water level of surging of surge-chamber can also be improved simultaneously, be conducive to the security of operation of surge-chamber.When particularly normally running, because damping ball is positioned at damper tube central authorities, and not exclusively closing the damping mouth of pipe, is only the area reducing the damping mouth of pipe, more favourable to the minor swing stability of power station diversion system.
The utility model proposes the regulator of a kind of new type auto adjustment Orifice area and damping, this device is based on " water hammer rupture disk " principle and " throttled surge chamber " basic structure, what utilize mechanical spring automatically replies function and fluid resistance and flow, flow velocity relation, the Orifice of conventional impedance formula surge-chamber is designed to laterally zygomorphic shaped telescopic tube form, intermediate arrangement can be freely movable damping ball, damping ball and spring are formed automatically can the novel Orifice of two-way tune area and damped coefficient size.
This device has surge-chamber to be reduced water hammer pressure, improves the function of unit operation performance, can make full use of again the advantage of throttled surge chamber.Model testing proves, this device can play the effect of " water hammer rupture disk ", can reduce the water hammer pressure of pressure pipeline, reduces the highest bore water level of surge-chamber, increases the minimum bore water level of surge-chamber, improves the safety in operation of surge-chamber.Be applied in power station, compared with general impedance formula surge-chamber, can reduce the design height of surge-chamber, reduce the excavation size of surge-chamber, cost saving, has practical and popularizing value.This device, except can be applicable to power station, also can be applied in the protecting water hammer design of industrial piping system.
Accompanying drawing explanation
Fig. 1 is the utility model impedance type regulator structural representation;
Fig. 2 is the utility model regulator support frame structure schematic diagram, i.e. Figure 1A A cross section structure schematic diagram.
In figure, 1 is damping ball, and 2 is supporting sliders, and 3 is damping springs, and 4 is bracing frames, and 41 is upper support frames, and 42 is lower support framves, and 51 is upper expanders, and 52 is lower expanders, and 6 is damper tubes, and 7 is aqueducts, and 8 is surge-chambers.
Detailed description of the invention
Below by embodiment, the utility model is specifically described; embodiment is only for being further detailed the utility model; can not be interpreted as the restriction to the utility model protection domain, some nonessential improvement that those skilled in the art makes according to above-mentioned content of the present utility model and adjustment also belong to the scope of the utility model protection.
Composition graphs 1 and Fig. 2.
Impedance type regulator, comprises aqueduct 9 and the surge-chamber 8 with atmosphere, and by successive watercourse and aqueduct 9 UNICOM bottom surge-chamber 8, having in successive watercourse can the damping ball 1 of Parallel to the flow direction movement, and damping ball 1 has the spacing control of damping spring 3.
Organize Buddhist nun's pipe 6 diameter in the middle part of successive watercourse be less than expander 51 and lower subordinate's expander 52 diameter on top and be symmetrical arranged up and down, successive watercourse both ends of the surface have bracing frame 4, two bracing frame 4 centers are fixed with the supporting slider 2 arranged along successive watercourse longitudinal center, supporting slider 2 is through damping ball 1 longitudinal center, and damping ball about 1 both ends of the surface have damping spring 3.
Upper and lower two damping springs 3 are separately fixed on the bracing frame 4 of both ends of the surface, and damping spring 3 contacts with damping ball 1 contact jaw and damping ball 1 are separable or are fixedly connected with.Described separable contact is that damping spring 3 is not fixed with damping ball 1 contact jaw, do away from time mobile at damping ball 1, damping spring 3 does not move with damping ball 1, be fixedly connected with is that damping spring 3 is fixedly connected with damping ball 1 contact jaw, do away from time mobile at damping ball 1, damping spring 3 moves with damping ball 1.
The ratio of damper tube 6 diameter and upper and lower expander 51,52 diameter is 0.7 ~ 0.8.This routine selection percentage is 0.707.The successive watercourse of reducing is adopted to be conducive to improving damping further.
The ratio the best organizing Buddhist nun's pipe 6 diameter in the middle part of damping ball 1 diameter and successive watercourse is 0.78.
The bracing frame 4 of successive watercourse both ends of the surface is the cross bracing frames 41,42 arranged along water channel radial direction.
According to operating principle and the fundamental equation of hydraulic power plant surge-chamber, its the fluctuating procession of the water level and turnover surge-chamber Variations in Flow Changes as shown in Figure 3 and Figure 4: Fig. 3 is surge-chamber water-level fluctuation figure, in figure, abscissa is time, unit second, and ordinate is surge-chamber water level elevation, unit m; Fig. 4 is the Variations in Flow Changes entering surge-chamber, and in figure, abscissa is time, unit second, and ordinate is turnover surge-chamber flow, unit m
3/ second.
Derive known according to hydrodynamics Bernoulli equation, the pressure differential of the upper and lower section of surge-chamber Orifice and the flow Q of turnover surge-chamber
sor flow velocity is relevant, and relevant with shape with Orifice area, can be expressed as following form:
In formula: △ h is the pressure reduction head of the upper and lower section of Orifice; ρ is the density of water; G is acceleration of gravity; △ z is the upper and lower cross section place discrepancy in elevation in aperture; K is the overall drag coefficient relevant with orifice area and shape, and p1 is inlet pressure, and p2 is outlet pressure.
The water pressure that damping ball is subject to:
F
p＝ρg·△h·s(2)
In formula: s is damping ball cross-sectional area.
Spring force:
F
k＝k
s·△x(3)
K
sfor the coefficient of elasticity of spring, △ x is spring-compressed or elongation.
Water pressure and elastic force constantly balance, i.e. F
p=F
k, therefore along with the flow Q of turnover surge-chamber
smechanical periodicity, water pressure is and then change also, and spring adjusts decrement automatically, and elastic force also changes, and automatically can change area and the adjustment damping size of Orifice.
As shown in Fig. 1 and Tu, the utility model arranges damping ball 1 in successive watercourse, the rood beam that the upper support frame 41 of upper expander 51 upper surface and the lower support frame 42 of lower expander 52 lower surface adopt, in this example, lower support frame is respectively with upper, lower damping spring 3 is fixed, the diameter of damping spring is adopted to be greater than middle impedance tube 6 mouthfuls of diameters during actual design, upper damping spring 3 lower end adopts movable contact with between damping ball 1, lower damping spring 3 upper end also adopts mobilizable contact with between damping ball 1, damping ball 1 upwards compresses damping spring 3, and damping spring 3 is motionless at present, under downward compression, during damping spring 3, upper damping spring 3 is motionless.A supporting slider 2 is arranged between upper and lower bracing frame 4, be positioned at damping spring 3 center, perforation in the middle of damping ball 1, supporting slider 2 is through damping ball 1, damping ball 1 freely up and down can move along supporting slider 2, leaves certain gap, be convenient to current poor by mineralization pressure between damping ball 1 and impedance tube 6, damping ball 1 plays the film lobe effect in " water hammer rupture disk ", upper and lower two-way adjustable.
Experimental result
The utility model impedance type regulator is tested in laboratory, adopt the digital pressure sensor of Chengdu Stettlen company, computer data acquiring software, directly carries out data acquisition with notebook computer, the data of actual measurement are as shown in table 1, and surge-chamber water-level fluctuation waveform comparison as shown in Figure 5.
The water-level fluctuation experimental data contrast table of table 1 Novel voltage-regulating device and former throttled surge chamber
Fig. 5 is the utility model regulator and former throttled surge chamber water-level fluctuation comparison diagram, in figure, abscissa is time, unit second, ordinate is surge-chamber water level, unit cm, draw water-level fluctuation larger be former throttled surge chamber water level, fluctuating less is the utility model regulator water level.
As can be seen from above-mentioned water-level fluctuation empirical curve, surge-chamber top surge water level reduces 13.7cm, and trough lowest water level adds 12cm.
Water hammer pressure experiment is from repeatedly measured data and tracing analysis, and after installing the utility model regulator, the water hammer pressure of pressure pipeline only slightly increases than during the former throttled surge chamber of installation, still can ensure the safety of pressure piping and turbine-generator units.
The utility model self-regulated damping regulator reaches Expected Results, obviously can observe the characteristics of motion of damping ball in experiment.When just starting, damping ball is movement rapidly, opens Orifice, is returned to centre position thereafter.
What the utility model utilized mechanical spring arrangement automatically replies the function principle relevant with flow or flow velocity with fluid resistance, first the operating principle of " water hammer rupture disk " and " throttled surge chamber " are combined, both remained surge-chamber to reduce water hammer pressure, improve the function of unit operation performance, take full advantage of again the advantage of throttled surge chamber, particularly Orifice area and damping two-way automatically adjustable, achieve the maximization of surge-chamber advantage, minimizing of shortcoming.
The utility model can support the use with various forms of surge-chamber, is applied in Hydropower Station Construction, can reduce the open excavation amount of conventional surge-chamber in a large number, cost saving, have good application and popularization value.If industrial water supply system adopts this device, and be combined with pressure gas tank, can effectively reduce the volume of pressure gas tank, not only convenient layout, can also play voltage regulation result more better than existing regulator, have good application prospect.
Claims (7)
1. a damped impedance formula regulator, comprise aqueduct and the surge-chamber with atmosphere, it is characterized in that: by successive watercourse and aqueduct UNICOM bottom described surge-chamber, have moveable damping ball in successive watercourse, damping ball has the spacing control of damping spring.
2. damped impedance formula regulator according to claim 1, it is characterized in that: described successive watercourse both ends of the surface have bracing frame, two bracing frame centers are fixed with the supporting slider arranged along successive watercourse longitudinal center, supporting slider is through damping ball center, and there is damping spring in damping ball upper/lower terminal face.
3. damped impedance formula regulator according to claim 2, is characterized in that: organize Buddhist nun's pipe diameter in the middle part of described successive watercourse and be less than expander and lower subordinate's enlarged diameter tube on top and be symmetrical arranged up and down.
4. damped impedance formula regulator according to claim 3, is characterized in that: described upper and lower two damping springs are separately fixed on the bracing frame of both ends of the surface, and damping spring contacts with damping ball contact jaw is separable or is fixedly connected with.
5. damped impedance formula regulator according to claim 3, is characterized in that: the ratio of described damper tube diameter and upper and lower enlarged diameter tube is 0.7 ~ 0.8.
6. damped impedance formula regulator according to claim 5, is characterized in that: the ratio of described damper tube diameter and upper and lower enlarged diameter tube is 0.707.
7. damped impedance formula regulator according to claim 3, is characterized in that: the bracing frame of described successive watercourse both ends of the surface is cross bracing frames that successive watercourse radial direction is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520460881.5U CN204753537U (en) | 2015-06-22 | 2015-06-22 | Damped impedance formula regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520460881.5U CN204753537U (en) | 2015-06-22 | 2015-06-22 | Damped impedance formula regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204753537U true CN204753537U (en) | 2015-11-11 |
Family
ID=54468263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520460881.5U Active CN204753537U (en) | 2015-06-22 | 2015-06-22 | Damped impedance formula regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204753537U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929087A (en) * | 2015-06-22 | 2015-09-23 | 西华大学 | Damping impedance type pressure regulating device |
| CN107355629A (en) * | 2017-07-10 | 2017-11-17 | 河海大学 | A kind of electromagnetic damping formula surge-chamber |
-
2015
- 2015-06-22 CN CN201520460881.5U patent/CN204753537U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929087A (en) * | 2015-06-22 | 2015-09-23 | 西华大学 | Damping impedance type pressure regulating device |
| CN107355629A (en) * | 2017-07-10 | 2017-11-17 | 河海大学 | A kind of electromagnetic damping formula surge-chamber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104929087A (en) | Damping impedance type pressure regulating device | |
| CN204753537U (en) | Damped impedance formula regulator | |
| CN200999969Y (en) | Pipeline pressure regulating apparatus | |
| CN211117829U (en) | Adjustable pressure reducing valve | |
| CN106763959B (en) | Agricultural irrigation large-diameter anti-winding washable pressure reduction and stabilization valve and application method thereof | |
| CN201522299U (en) | Device for measuring gas extraction flow | |
| CN101178051B (en) | Cave system differential surge chamber | |
| CN203808031U (en) | Sealed type hydropower station pressure regulating chamber | |
| CN109440743A (en) | Pressure regulation chamber device, system and the control method of controllable impedance hole area | |
| CN104110016B (en) | Piston energy dissipation type surge-chamber | |
| CN207094013U (en) | A kind of shock resistance elbow | |
| CN202928629U (en) | Measuring device for air passage flow of boiler combustion system | |
| CN203116938U (en) | Device for simulating eagre in hydraulic model test | |
| CN205978684U (en) | Water route flow stability device | |
| CN203175746U (en) | Hydrodynamic water elevator | |
| CN201250399Y (en) | Dual differential effect surge chamber | |
| CN209213051U (en) | A kind of regulating valve of high pressure resistant difference | |
| CN210459091U (en) | Water tank device suitable for hydraulic transition process model test | |
| CN204252079U (en) | Long apart from standard section gravity flow canal increasing water delivery flow apparatus | |
| CN204187038U (en) | Multi-functional pilot-operated diaphragm valve | |
| CN209706794U (en) | A kind of automatic slowly priming apparatus applied to water-pipe type settlement instrument | |
| CN209892813U (en) | Steady-flow voltage regulator | |
| CN208778789U (en) | A kind of super micro pressure self | |
| CN203144983U (en) | Vertical shaft water cushion energy dissipater applied to gorge weak anti-impact geology | |
| CN212745215U (en) | Differential pressure bypass assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |