CN203572729U - Cavitation erosion resistance test device for hydraulic concrete - Google Patents

Cavitation erosion resistance test device for hydraulic concrete Download PDF

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Publication number
CN203572729U
CN203572729U CN201320575007.7U CN201320575007U CN203572729U CN 203572729 U CN203572729 U CN 203572729U CN 201320575007 U CN201320575007 U CN 201320575007U CN 203572729 U CN203572729 U CN 203572729U
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CN
China
Prior art keywords
cavitation
test
test specimen
diffuser
hydraulic concrete
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.)
Expired - Fee Related
Application number
CN201320575007.7U
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Chinese (zh)
Inventor
王新
骆少泽
张陆陈
谢罗峰
李子阳
陈诚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources
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Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources
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Filing date
Publication date
Application filed by Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources filed Critical Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources
Priority to CN201320575007.7U priority Critical patent/CN203572729U/en
Application granted granted Critical
Publication of CN203572729U publication Critical patent/CN203572729U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a cavitation erosion resistance test device for hydraulic concrete. The principle for a zooming cavitation erosion generator is reserved and a manner that an axial symmetry perfect diffusion is carried out on a circular laryngeal aperture and an export is adopted, so that cavitation bubbles are uniformly broken on the wall surface of a conical divergent segment in a total and symmetrical mode, thereby realizing the cavitation erosion damaging effect on a round of wall surfaces all the same, enlarging the accommodating areas for test pieces, and meeting the demand that a cavitation erosion resistance test is carried out on a plurality of test pieces at the same time under the same condition. The test efficiency and the reliability of test results are increased.

Description

Resistance of hydraulic concrete cavitation test device
Technical field
The utility model relates to a kind of test unit, is a kind of resistance of hydraulic concrete cavitation test device specifically, belongs to hydraulic engineering material test field.
Background technology
Cavitation erosion is hydraulic outlet works ubiquity, not yet obtains the engineering problem properly settled.There are some researches show, when water velocity reaches 15m/s, just there will be cavitation and cavitation erosion phenomenon, and hydraulic outlet works cross Flow Velocity generally more than 30m/s, especially in recent years, along with the fast development of water conservancy and hydropower, project scale constantly expands, height of dam has reached 300m level, and earial drainage flow velocity exceedes 50m/s, and the cavitation and cavitation erosion problem of outlet structure escape works is further outstanding.
The anti-Cavitation of hydraulic outlet works is focus and the difficult point of research always.Through long-term research and practice, proposed many anti-cavitation corrosion measures and be applied to engineering, mainly comprise structural style optimization, air mixing corrosion reducing, raising construction quality, adopt anti-cavitation corrosion material etc.Wherein, first three kind measure belongs to " preventing ", all has certain limit, and after adopting optimum build, air mixing corrosion reducing, best construction, Cavitation occurs toward contact meeting; And adopt anti-cavitation corrosion material to belong to " resisting ", and be effective measures, be also the major measure that solves at present Cavitation.Research about resistance of hydraulic concrete cavitation corrosion material did not stop all the time, followed scientific and technological progress, and various anti-cavitation corrosion new materials continue to bring out, but the anti-Cavitation of new material how, need to investigate and evaluate.
At present, substantially be all to adopt the scalability cavitation corrosion generator of recommending in < < hydraulic structure anti-impact mill cavitation prevention concrete technology standard > > (DL/T5207-2005) to carry out the anti-cavitation test of concrete for hydraulic structure, by the method for contrast, carry out performance evaluation.The effect of the method cavitation corrosion is stronger, can accelerate test specimen destroys, but can only carry out the cavitation test of a test specimen at every turn, due to test propulsion system power large (more than 100 kilowatt hours), every group of test period grow (8 hours), when test group inferior when more, not only energy consumption is larger, test period is long, the more important thing is every group of test, the running status of device can not be adjusted to identical, and test findings is existed to certain impact.
Summary of the invention
The purpose of this utility model is to provide one can carry out the anti-cavitation test device of polylith test specimen under identical condition simultaneously, to improve the reliability of test efficiency and test findings.
The technical scheme that the utility model achieves the above object is:
Resistance of hydraulic concrete cavitation test device, continue to use the principle of scaling type cavitation corrosion generator, in structure, be different from rectangle aditus laryngis and outlet half diffusion of traditional scaling type cavitation corrosion generator, adopt circular aditus laryngis and 360 ° of rotational symmetry perfect diffusions of outlet, cavitation bubble is evenly crumbled and fall at diffuser wall full symmetric, realization is to the identical cavitation erosion effect of a peripheral wall surfaces, and having increased test specimen can arrangement areas, meets polylith test specimen and carries out under the same conditions anti-cavitation test simultaneously.
Described test unit, comprises contraction section, test specimen groove and diffuser.Contraction section and diffuser all adopt tapered tube to shrink and diffusion, both junction aditus laryngis circular cross section area minimums, High-Pressure Water reaches maximum through contraction section at aditus laryngis flow velocity, high-velocity flow generation cavitation, cavitation bubble is crumbled and fall in diffuser higher-pressure region, the impact zone of crumbling and fall of corresponding diffuser cavitation bubble, rotational symmetry is arranged the test specimen groove of one week evagination, test specimen groove inside surface replaces diffuser wall with the test specimen limited post of equidistantly arranging, before and after test specimen groove, two sides are vertical with diffuser wall, test specimen is placed in test specimen groove, limited post constraint in test specimen groove, the inside surface of test specimen and smooth-going linking of diffuser wall before and after it, be subject to cavitation corrosion effect, the shell locking of taper for test specimen outside.
Described test unit, the test specimen quantity of simultaneously testing can design as required, test specimen quantity is installed at most and equates with limited post quantity, between adjacent two limited posts, arranges a test specimen; The mould of making test specimen need customize according to Specimen Shape size.
Described test unit, vertical layout with elimination current effect of weight, had both guaranteed the complete rotational symmetry of cavitation corrosion effect, was also convenient to test specimen and installed.
Described test unit, the pressure of diffuser is larger on the impact of test cavitation corrosion state, adopts high pressure valve and configure tensimeter to regulate diffuser pressure, to reach different cavitation corrosion states.
Described test unit, aditus laryngis flow velocity is obtained divided by aditus laryngis cross-sectional area by the flow of the electromagnetic flowmeter monitoring of installing front layout, more than maximum flow of water stream scooter 60m/s, can meet the testing requirements of flow velocitys at different levels.
Described test unit, belongs to high-pressure system, adopts steel high pressure seamless pipe to make, and valve adopts high pressure valve that can pressure-bearing 25kg.
The utility model compared with the prior art tool has the following advantages:
Realized the perfect diffusion of cavitation current rotational symmetry, the anti-cavitation test that can simultaneously carry out under the same conditions polylith test specimen, has not only improved test efficiency, saves energy consumption, and significantly promoted the reliability of test findings, contribute to the anti-Cavitation comparative evaluation of different materials.
accompanying drawing explanation
Fig. 1 is the schematic diagram of resistance of hydraulic concrete cavitation test device;
Fig. 2 is diffuser test specimen groove A-A sectional view.
embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Resistance of hydraulic concrete cavitation test device, comprise import taper contraction section 1, taper diffuser 2 and test specimen groove 3, contraction section 1 and diffuser 2 junctions are aditus laryngis 4, aditus laryngis 4 is circular cross section, area minimum, on the diffuser 2 that 3 one weeks rotational symmetry of test specimen groove are arranged in, its corresponding diffuser wall is cut off, with nine test specimen limited posts 11 of equidistant layout, connect and replace, test specimen groove 3 two sides, front and back are vertical with diffuser 2 walls, nine test specimens 5 are placed in test specimen groove 3, test specimen 5 is retrained by the interior limited post 11 of test specimen groove 3, inside surface and smooth-going linking of diffuser wall before and after it, test specimen 5 outsides lock with conical shell 12.Device advances and arranges that electromagnetic flowmeter 7 monitors flow and aditus laryngis flow velocity on water pipe 6, and after device, rising pipe 9 is arranged high pressure valve 10, adjusts mouth pressure, before and after device, all arranges that tensimeter 10 carries out pressure monitoring.
High-Pressure Water is by water inlet pipe 6 access to plant contraction sections 1, at aditus laryngis 4 flow rate of water flow, reach maximum, high-velocity flow generation cavitation, cavitation bubble is crumbled and fall in the downstream diffuser 2 complete rotational symmetry in higher-pressure region, and there is identical cavitation corrosion effect in the inside surface of nine test specimens 5 that hoop is arranged.Device is vertical arranges to eliminate current effect of weight, has both guaranteed the complete rotational symmetry of cavitation corrosion effect, is also convenient to test specimen 5 and installs.

Claims (4)

1. resistance of hydraulic concrete cavitation test device, it is characterized in that: comprise contraction section, test specimen groove and diffuser, described contraction section and diffuser all adopt tapered tube to shrink and diffusion, and both junction aditus laryngis are circular cross section, realize the rotational symmetry perfect diffusion of cavitation current; At the impact zone of crumbling and fall of diffuser cavitation bubble, rotational symmetry is arranged the test specimen groove of one week evagination, test specimen groove inside surface replaces diffuser wall with the test specimen limited post of equidistantly arranging, before and after test specimen groove, two sides are vertical with diffuser wall, limited post constraint in test specimen groove, test specimen inside surface and diffuser wall before and after it be smooth-going is connected, is subject to cavitation corrosion effect, the shell locking of taper for test specimen outside.
2. resistance of hydraulic concrete cavitation test device according to claim 1, is characterized in that: test specimen quantity is installed at most and equates with limited post quantity, between adjacent two limited posts, arrange a test specimen; The mould of making test specimen customizes according to Specimen Shape size.
3. resistance of hydraulic concrete cavitation test device according to claim 1, is characterized in that: device belongs to high-pressure system, adopts steel high pressure seamless pipe to make, and valve adopts high pressure valve that can pressure-bearing 25kg.
4. according to the resistance of hydraulic concrete cavitation test device one of claim 1~3 Suo Shu, it is characterized in that: device is vertically arranged, to eliminate current effect of weight, has both guaranteed the complete rotational symmetry of cavitation corrosion effect, be also convenient to test specimen and install.
CN201320575007.7U 2013-09-17 2013-09-17 Cavitation erosion resistance test device for hydraulic concrete Expired - Fee Related CN203572729U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320575007.7U CN203572729U (en) 2013-09-17 2013-09-17 Cavitation erosion resistance test device for hydraulic concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320575007.7U CN203572729U (en) 2013-09-17 2013-09-17 Cavitation erosion resistance test device for hydraulic concrete

Publications (1)

Publication Number Publication Date
CN203572729U true CN203572729U (en) 2014-04-30

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Application Number Title Priority Date Filing Date
CN201320575007.7U Expired - Fee Related CN203572729U (en) 2013-09-17 2013-09-17 Cavitation erosion resistance test device for hydraulic concrete

Country Status (1)

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CN (1) CN203572729U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107367372A (en) * 2017-08-07 2017-11-21 西南石油大学 A kind of multichannel water hole cavitation experimental provision
CN109540781A (en) * 2018-12-01 2019-03-29 罗峰 Compaction test apparatus is used in a kind of construction of the highway test

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107367372A (en) * 2017-08-07 2017-11-21 西南石油大学 A kind of multichannel water hole cavitation experimental provision
CN109540781A (en) * 2018-12-01 2019-03-29 罗峰 Compaction test apparatus is used in a kind of construction of the highway test

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140430

Termination date: 20140917

EXPY Termination of patent right or utility model