CN2476013Y - Low water level high current speed low turbulence gravity type water tunnel - Google Patents
Low water level high current speed low turbulence gravity type water tunnel Download PDFInfo
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- CN2476013Y CN2476013Y CN 01223855 CN01223855U CN2476013Y CN 2476013 Y CN2476013 Y CN 2476013Y CN 01223855 CN01223855 CN 01223855 CN 01223855 U CN01223855 U CN 01223855U CN 2476013 Y CN2476013 Y CN 2476013Y
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 230000005484 gravity Effects 0.000 title claims abstract description 40
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- 230000007246 mechanism Effects 0.000 claims abstract description 8
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- 206010038743 Restlessness Diseases 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
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Abstract
本实用新型涉及一种水动力学实验用的低水位大流速低湍流度的重力式水洞。包括重力水箱、稳定段、收缩段、实验段、方变圆段、流量计段、阀门段依次连通，其中重力水箱有一入水口，通过管路与泵群连接；水处理机构安装在水源出口处；控制柜与阀门和流量计用电缆连接；重力水箱侧壁开有方形口，内装有喇叭形导流管，其上连接一内部交替安装多层蜂窝状板和整流网的稳定段，由三维维式曲线壁板构成的收缩段，其入口和出口截面比为14∶1。
The utility model relates to a gravity water tunnel with low water level, high flow velocity and low turbulence degree used in hydrodynamic experiments. Including gravity water tank, stabilization section, contraction section, experiment section, square-to-circle section, flow meter section, and valve section connected in sequence, in which the gravity water tank has a water inlet, which is connected to the pump group through pipelines; the water treatment mechanism is installed at the outlet of the water source ;The control cabinet is connected with the valve and the flowmeter by cables; the side wall of the gravity water tank has a square opening, and a trumpet-shaped diversion pipe is installed inside, and a stable section with multi-layer honeycomb plates and rectification nets is connected to it. The constriction section formed by the Victorian curve wall plate has a cross-section ratio of 14:1 at the entrance and exit.
Description
The utility model relates to a kind of hydrodynamics experimental provision, hangs down the gravity type water hole of turbulivity especially for the big flow velocity of a kind of low-water level of the meticulous flowing experiment research and teaching demonstration of carrying out turbulent flow.
Present water hole both domestic and external roughly is divided into dynamical type and gravity type.The dynamical type water hole is to be flowed by the screw propeller promotion water cycle that driven by motor is installed in the pipeline of water hole, its advantage is that flow velocity height, flow are big, but be difficult to eliminate the interference of drive unit stream field, be unfavorable for improving the mobile quality in experimental section flow field and reduce the turbulivity in flow field; The gravity type water hole is to utilize water level potential energy to promote to flow, and avoided the interference of drive unit stream field, so the ground unrest of incoming flow is little.But because the experimental section flow velocity is subjected to the restriction of height of water level, the flow velocity in gravity type water hole is generally lower＜0.2ms
-1In order to reach high flow velocities (〉=1 ms
-1), often realize by the height that improves gravity tank.Some water hole is built in height more than 10 meters with gravity tank.The shortcoming of this design proposal is: the raising of gravity tank height certainly will prolong hydraulic pipeline, and this can make construction costs increase substantially.Therefore simply by the realization high flow velocities of flooding, be not science and economic way.How utilizing the little characteristics of gravity type water hole incoming flow ground unrest, can be issued to higher flow velocity at lower water level again, and make the experimental section flow field have good flow field quality and lower turbulivity, is the target that the utility model is pursued.
The purpose of this utility model is in order to overcome existing dynamical type water hole in measuring process, promote water cycle and flow because driven by motor is installed in screw propeller in the pipeline, and stream field brings interference, is unfavorable for reducing the shortcoming of the turbulivity in flow field; In order to reach under lower water level (≈ 3m), improve flow velocity (〉=1 ms in water hole
-1), and have lower turbulivity (≤0.3%), thus the gravity type water hole device of the low turbulivity of the big flow velocity of a kind of low-water level is provided.
The purpose of this utility model is achieved in that
The gravity type water hole of the low turbulivity of the big flow velocity of a kind of low-water level that the utility model provides, comprise that gravity tank, tubular stable section, contraction section, experimental section and square change garden section, tubular flowmeter section, valve section are communicated with successively, wherein gravity tank has a water inlet, is connected with the pump group by pipeline; Water treatment mechanism is installed in the exit, water source, and the drinking-water pipe that it is communicated with the pump group is terminal to be inserted in the big tank; Flowmeter is installed in the flowmeter section, and valve is installed in valve section, is communicated with by a square runner between the big or small tank; It is characterized in that: overflow plate with holes is housed in the gravity tank, the water tank rear side has a spill box, one overflow vent is arranged under the spill box, its sidewall has a square orifice, one tubaeform mozzle is installed in it, be connected a stable section with it, multi-layer honeycomb shape cowling panel and screens alternately are installed in the stable section, to obtain steadily, to hang down the current of turbulivity; By the contraction section that three-dimensional dimension formula (Witozinky) curve wallboard constitutes, its entrance and exit section ratio is 14: 1, can increase substantially exit velocity; Automatic control cabinet is connected with cable with flowmeter with two valves that are installed in parallel on valve section, and described valve is to adopt two large and small electronic, manual ratio adjusting valves that do not wait of internal diameter, is installed in parallel on valve section.
Advantage of the present utility model is: (1) reduces the frictional resistance of water hole along Cheng Guandao widely by rational hydrodynamics design.As mentioned above, the experimental section flow velocity in gravity type water hole is relevant with the incoming flow water level, and is simultaneously also relevant with the on-way resistance of pipeline.If on-way resistance is big, consume the energy of incoming flow, the flow velocity of experimental section is carried not high naturally.For reduce coming the loss of stream energy, the design has taked following measure to reduce the on-way resistance of pipeline: a. pipeline on-way resistance is directly proportional with square of flow velocity, just the low on-way resistance of pipeline that can make of flow velocity reduces.According to the flow field continuity principle, same flow increases caliber down can reduce flow velocity, therefore the pipeline of non-experimental section is adopted as far as possible the pipeline of big caliber; B., measurement and trim such as flowmeter and valve have been installed in pipeline.In order to reduce frictional resistance, select the little device of stream field resistance.As select electromagnetic flowmeter and accurate electronic, dual-use manual variable valve for use; More than two measures make water hole of the present invention in 9 meters long body runner, only be the 0.3m water column along the journey friction loss.This greatly reduces trunking loss.Water hole of the present invention is had only under the condition of 2.6m at height of water level, reach the flow rates 0.05～1ms of broad
-1, max-flow scooter 1.25ms
-1
(2) turbulivity in reduction experimental section flow field: the fairing in a. appropriate design overflow gravity tank, reduce the pulsation of incoming flow, improve the homogeneity that inlet flows; B. multilayer screens in the stable section, in order to the unevenness that elimination flows to the whirlpool and causes, the c. contraction section adopts big shrinkage ratio (14: 1), reduces the relative turbulivity of incoming flow.Above three measures makes turbulivity＜0.3% in experimental section flow field, and the flow velocity heterogeneity is less than 1% on the 80%-86% area of experimental section cross section.
(3) realize meticulous adjusting in the wide flow rates: in order to reduce the pipeline that frictional resistance has adopted big caliber, bring difficulty for the flow velocity accurate adjustment, so the present invention adopts big minor valve parallel connection, come the dependable flow accurate adjustment with closed loop regulation circuit to flow velocity.
(4) stable section, contraction section and the experimental section in water hole are all made with pmma material simultaneously, are convenient to flow field observation and teaching demonstration.
Drawing is described as follows:
Below in conjunction with drawings and Examples the utility model is described in detail:
Fig. 1 is a structural representation of the present utility model
Fig. 2 is a gravity tank inner structure synoptic diagram of the present utility model
Drawing is described as follows:
The 1-water source; The 2-water circulation mechanism; 3-square orifice 4. gravity tank 5-stable sections;
The 6-contraction section; The 7-experimental section; 8-side becomes the garden section; 9-flowmeter section; 10. valve section;
11. little tank; 12 square runners; The big cistern of 13-; 14-pump group; The 15-flowmeter;
The 16-control valve; 17 switch boards; 18-water treatment mechanism; The 19-water inlet; The 20-overflow vent;
The 21-spill box; 22-orifice plate (overflow plate); The 23-flow-guiding mouth; The 24-pipeline;
The 25-drinking-water pipe;
Embodiment 1
Make the gravity type water hole that a big flow velocity of low-water level hangs down turbulivity by Fig. 1, adopt the PVC plastic plate to make one 8 tons of gravity tanks 4, gravity tank 4 is of a size of 2m * 2m * 2.5m, and the volume of capable of storing water is 8m
3Gravity tank has a water inlet 19, and gravity tank is installed an orifice plate 22 at 4 the end, and it is square orifice that sidewall has a water delivering orifice, and a tubaeform mozzle 23 is housed in the gravity tank square orifice; The square orifice that gravity tank 4 sidewalls have 0.75m * 0.75m is connected with stable section 5; Stable section 5 long 1.4m, the cross section is 0.75m * 0.75m
2Square, inside are equipped with a plurality of honeycombs and screens, are preferably two honeycombs and six road screenses, and its function is stable and the arrangement incoming flow.The length of contraction section 6 is 1.4m, and the entrance and exit section ratio is 14: 1.The molded lines design of contraction section 6 is directly connected to flow field quality, therefore selects to adopt three-dimensional dimension formula curve as shrinking molded lines.Experimental section 7 is by preferably selecting 3 sections pipelines to form, every segment length 1m, sectional dimension 0.2m * 0.2m
2: wherein two sections sidewall has the experiment window, and empirical model and surveying instrument are installed.Experimental section 7 downstreams connect side's change garden section 8, and its entrance section is 0.2m * 0.2m square, and exit diameter is 20cm, and length is 0.8m.Because the cross section of flowmeter in the pipeline 15 and ratio adjusting valve door 16 all is circular, so this section plays the effect that changes the pipeline cross sectional shape.The effect of flowmeter section 9 is for flowmeter 15 is installed.The requirement that its length is installed according to flowmeter is designed to 2.3m, and diameter is 20cm.Valve section 10 designs for electronic ratio adjusting valve 16 is installed, and length 1.6m, diameter are 20cm.Little tank 11 is led in the outlet of valve section 10.Stable section 5, contraction section 6 are sealably coupled to experimental section 7, and these three sections are all adopted pmma material to manufacture; By square change garden section 8 experimental section 7 is communicated with flowmeter section 9 and valve section 10.These two sections are adopted plastic conduit.The electromagnetic flowmeter of buying on the market 15 is installed on the flowmeter section 9, electronic, manual ratio adjusting valve 16 is installed on the valve section 10, the end of valve section 10 inserts 1.8 tons little cistern 11, and the square runner 12 that passes through 10 meters then inserts 20 tons big tanks 13.The length of square runner 12 can be determined according to the actual range of big or small tank.Pump group 14 drinking-water pipe 25 inserts big tank 13, and rising pipe is communicated with gravity tank 4.Controller 17 is settled near the water delivering orifice, is connected with electromagnetic flowmeter 15 usefulness cables with electronic, manual ratio adjusting valve 16.
Have the water circulation mechanism 2 of water supply and water storage function, comprising: big or small tank 11 and 13, square runner, pump group 14 and water treatment mechanism 18.Little tank 11 is 2m * 1m * 1m, 1.8 tons of volumes.Its function is the venting valve gate segment 10 exit waters surface, reduces the disturbance of back-pressure pulsation to the flow field, upstream.Big tank 13 is of a size of 6.5m * 2m * 1.7m, and the volume of capable of storing water is 20 tons.Its function is retaining.The square runner 12 long 10m that connect big or small tank, cross section 0.4m * 0.6m
2The initial water of tank is provided by the water source.For the water at physical cleaning water source, it is to have adopted hot-film probe that water treatment mechanism 18 has been installed, and hot-film probe 18 is installed in 1 exit, water source, the terminal access in 20 tons of tanks 13.To the water deionization, this is to the water quality requirement for the damage that prevents surveying instrument simultaneously.Pump group 14 is made up of three different centrifugal pumps of flow, and its flow is set according to flow rates.Pump group 14 draws up and squeezes into gravity tank 4 with the water of tank.
Claims (6)
1, the gravity type water hole of the low turbulivity of the big flow velocity of a kind of low-water level, comprise that gravity tank, tubular stable section (5), contraction section (6), experimental section (7) and square change garden section (8), tubular flowmeter section (9), valve section (10) are communicated with successively, wherein gravity tank (4) has a water inlet (19), is connected with pump group (14) by pipeline (24); Water treatment mechanism (18) is installed in exit, water source (1), and the drinking-water pipe (25) that it is communicated with pump group (14) is terminal to be inserted in the big tank (13); Flowmeter (15) is installed in flowmeter section (9), and valve (16) is installed in valve section (10), is communicated with by a square runner between the big or small tank (13) (11); It is characterized in that: overflow plate with holes (22) is housed in the gravity tank (4), water tank (4) rear side has a spill box (21), one overflow vent (20) is arranged under the spill box (21), its sidewall has a square orifice (3), one tubaeform mozzle (23) is installed in it, is connected a stable section (5) with it, stable section is alternately installed multi-layer honeycomb shape cowling panel and screens in (5), described contraction section (6) is made of three-dimensional dimension formula curve wallboard, and its entrance and exit section ratio is 14: 1; Automatic control cabinet (17) is connected with cable with flowmeter (15) with two valves (16) that are installed in parallel on valve section (10), described valve (16) is to adopt two large and small electronic, manual ratio adjusting valves that do not wait of internal diameter, is installed in parallel on valve section (10).
2, by the gravity type water hole of the low turbulivity of the big flow velocity of the described a kind of low-water level of claim 1, it is characterized in that: two sections sidewalls that also are included in experimental section (7) have the experiment window, and empirical model and surveying instrument are installed.
3, by the gravity type water hole of the low turbulivity of the big flow velocity of the described a kind of low-water level of claim 1, it is characterized in that: described experimental section (15) is made up of N section pipeline, and the N section is at least 2, is 3 sections best.
4, by the gravity type water hole of the low turbulivity of the big flow velocity of the described a kind of low-water level of claim 1, it is characterized in that: described experimental section (15) is every segment length 1m best, sectional dimension 0.2m * 0.2m
2
5, by the gravity type water hole of the low turbulivity of the big flow velocity of the described a kind of low-water level of claim 1, it is characterized in that: described pump group (14) is made up of two different centrifugal pumps of flow at least.
6, by the gravity type water hole of the low turbulivity of the big flow velocity of the described a kind of low-water level of claim 1, it is characterized in that: 2～4 cellular boards and 4～8 road screenses alternately are equipped with in described stable section (5) inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01223855 CN2476013Y (en) | 2001-05-16 | 2001-05-16 | Low water level high current speed low turbulence gravity type water tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01223855 CN2476013Y (en) | 2001-05-16 | 2001-05-16 | Low water level high current speed low turbulence gravity type water tunnel |
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| CN2476013Y true CN2476013Y (en) | 2002-02-06 |
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|---|---|---|---|
| CN 01223855 Expired - Fee Related CN2476013Y (en) | 2001-05-16 | 2001-05-16 | Low water level high current speed low turbulence gravity type water tunnel |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541328A (en) * | 2013-10-24 | 2014-01-29 | 北京理工大学 | Oscillating hydrofoil drive system for water tunnel experiments |
| CN106768832A (en) * | 2016-11-23 | 2017-05-31 | 哈尔滨工业大学深圳研究生院 | Turbulent flow experiment porch |
| CN107167295A (en) * | 2017-04-20 | 2017-09-15 | 南京理工大学 | Vertical bearing temperature is adjustable experiment water hole |
| CN109260972A (en) * | 2018-10-16 | 2019-01-25 | 江苏大学 | A kind of fine bubble generating apparatus based on cylinder flow-disturbing shearing effect |
| CN112798225A (en) * | 2021-01-21 | 2021-05-14 | 中国人民解放军海军工程大学 | Vertical tandem double test section cavitation water tunnel test device |
| CN114255640A (en) * | 2021-11-12 | 2022-03-29 | 赤峰学院 | Hydraulic experimental device for heat supply pipeline |
| CN114689268A (en) * | 2020-12-28 | 2022-07-01 | 上海树根自动化测试技术有限公司 | Novel fluid detection test bed |
| CN114813039A (en) * | 2022-04-29 | 2022-07-29 | 安徽农业大学 | Venturi type high-speed cavitation water tunnel test device |
| CN116735148A (en) * | 2023-04-10 | 2023-09-12 | 西北工业大学 | A water tunnel experimental device, system and method based on the principle of ejection |
| CN118961137A (en) * | 2024-08-07 | 2024-11-15 | 北京大学 | Water tunnel experimental device |
-
2001
- 2001-05-16 CN CN 01223855 patent/CN2476013Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541328B (en) * | 2013-10-24 | 2015-05-20 | 北京理工大学 | Oscillating hydrofoil drive system for water tunnel experiments |
| CN103541328A (en) * | 2013-10-24 | 2014-01-29 | 北京理工大学 | Oscillating hydrofoil drive system for water tunnel experiments |
| CN106768832B (en) * | 2016-11-23 | 2018-12-04 | 哈尔滨工业大学深圳研究生院 | Turbulent flow experiment porch |
| CN106768832A (en) * | 2016-11-23 | 2017-05-31 | 哈尔滨工业大学深圳研究生院 | Turbulent flow experiment porch |
| CN107167295B (en) * | 2017-04-20 | 2019-05-07 | 南京理工大学 | Vertical pressure temperature adjustable experimental water tunnel |
| CN107167295A (en) * | 2017-04-20 | 2017-09-15 | 南京理工大学 | Vertical bearing temperature is adjustable experiment water hole |
| CN109260972A (en) * | 2018-10-16 | 2019-01-25 | 江苏大学 | A kind of fine bubble generating apparatus based on cylinder flow-disturbing shearing effect |
| CN114689268A (en) * | 2020-12-28 | 2022-07-01 | 上海树根自动化测试技术有限公司 | Novel fluid detection test bed |
| CN112798225A (en) * | 2021-01-21 | 2021-05-14 | 中国人民解放军海军工程大学 | Vertical tandem double test section cavitation water tunnel test device |
| CN112798225B (en) * | 2021-01-21 | 2023-09-05 | 中国人民解放军海军工程大学 | Vertical tandem double-test section cavitation water hole test device |
| CN114255640A (en) * | 2021-11-12 | 2022-03-29 | 赤峰学院 | Hydraulic experimental device for heat supply pipeline |
| CN114813039A (en) * | 2022-04-29 | 2022-07-29 | 安徽农业大学 | Venturi type high-speed cavitation water tunnel test device |
| CN116735148A (en) * | 2023-04-10 | 2023-09-12 | 西北工业大学 | A water tunnel experimental device, system and method based on the principle of ejection |
| CN118961137A (en) * | 2024-08-07 | 2024-11-15 | 北京大学 | Water tunnel experimental device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |