CN202048938U - Trench weir type flow meter - Google Patents
Trench weir type flow meter Download PDFInfo
- Publication number
- CN202048938U CN202048938U CN2011201138627U CN201120113862U CN202048938U CN 202048938 U CN202048938 U CN 202048938U CN 2011201138627 U CN2011201138627 U CN 2011201138627U CN 201120113862 U CN201120113862 U CN 201120113862U CN 202048938 U CN202048938 U CN 202048938U
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- weir
- plate
- measuring flume
- canal formula
- delivering orifice
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Abstract
The utility model provides a trench weir type flow meter, which comprises a measuring groove. A weir plate is fixed in the measuring groove, a groove body of the measuring groove is divided into a first section and a second section via the weir plate, a staff gauge is fixed on the inner side surface of a side wall of the first section, the weir plate is provided with a water outlet, and the measuring groove is fixed with a level which is used for checking the levelness of a bottom plate between a first side wall of the measuring groove and a second side wall of the measuring groove. The measuring groove is provided with the level, the flowmeter can be leveled according to the level when the flowmeter is placed, so that measurement accuracy is higher, and errors during measurement of small flow can be reduced.
Description
Technical field
The utility model relates to a kind of instrument of measuring fluid flow, particularly relates to a kind of weir canal formula flowmeter.
Background technology
The flow and the flow velocity that need the exact grasp fluid in the hydraulic engineering.In the more engineering place that utilizes the open type channel such as irrigation and water conservancy or artificial swamp, the application of tubular type flowmeter has been subjected to many restrictions, is a kind of efficient ways and utilize weir canal formula structures to measure flow.
The measuring principle of weir canal formula structures is: the weir plate of given shape is installed in straight channel, is made current overflow this weir plate and earial drainage.According to fluid mechanics principle, exist corresponding conversion relation between the depth of water of overflow and the flow.
Though building weir canal formula structures can be measured fluid flow in rivers and canals, but need a large amount of manpowers in the building course, material resources, be easy to be subjected to the restriction of landform simultaneously, and the weir canal formula flowmeter of making according to above-mentioned structure structure usually makes measuring accuracy reduce when measuring because measuring flume is placed.
The utility model content
The purpose of this utility model provides a kind of convenient adjusting measuring flume level, the weir canal formula flowmeter that measuring accuracy is higher.
Weir of the present utility model canal formula flowmeter, comprise measuring flume, the measuring flume internal fixation has weir plate, described weir plate is divided into first section and second section with the cell body of described measuring flume, be fixed with scale on the medial surface of described first section sidewall, have water delivering orifice on the described weir plate, be fixed with spirit-leveling instrument on the described measuring flume in order to the floor level degree between second sidewall of the first side wall of checking described measuring flume and described measuring flume.
Weir of the present utility model canal formula flowmeter wherein, is provided with balance plate between described the first side wall and described second sidewall, and described balance plate is parallel with the base plate of described measuring flume, and the middle part of described balance plate is fixed with described spirit-leveling instrument.
Weir of the present utility model canal formula flowmeter, wherein, described balance plate is positioned at described first section top.
Weir of the present utility model canal formula flowmeter, wherein, described spirit-leveling instrument is a spirit level.
Weir of the present utility model canal formula flowmeter, wherein, described water delivering orifice is for falling isosceles triangle, and the drift angle of described water delivering orifice is 90 degree, and the vertical axis of described water delivering orifice overlaps with the vertical axis of described weir plate.
Weir of the present utility model canal formula flowmeter, wherein, the A/F b of described first section length f and described water delivering orifice satisfies: f=2.5 * b.
Weir of the present utility model canal formula flowmeter, wherein, described scale is k to the air line distance of described weir plate, the opening depth d of k and described water delivering orifice satisfies: k 〉=3 * d.
Weir of the present utility model canal formula flowmeter wherein, is fixed with handle respectively on the lateral surface of the lateral surface of described the first side wall and described second sidewall.
Flowmeter measuring flume of the present utility model is provided with spirit-leveling instrument, can be when placing flowmeter according to the spirit-leveling instrument leveling, thus make institute's measurement of discharge accuracy higher, the error when reducing low discharge and measuring.
Description of drawings
Fig. 1 is the stereographic map of the structural representation of flowmeter of the present utility model;
Fig. 2 is the vertical view of the structural representation of flowmeter of the present utility model;
Fig. 3 is the A-A cut-open view of Fig. 2;
Embodiment
As Fig. 1, Fig. 2, shown in Figure 3, weir of the present utility model canal formula flowmeter comprises the uncovered rectangle measuring flume 1 of organic glass material.Measuring flume 1 internal fixation has weir plate 2, has water delivering orifice 21 on the weir plate 2.Measuring flume 1 comprises the first side wall 11, second sidewall 12, base plate 15.Base plate 15 is between the first side wall 11, second sidewall 12.Be fixed with spirit-leveling instrument 5 on the measuring flume 1 in order to the floor level degree between checking measurements groove the first side wall 11 and measuring flume second sidewall 12.
Weir plate 2 is respectively perpendicular to three inwalls of measuring flume 1.Have down the water delivering orifice 21 of isosceles triangle on the weir plate 2, the apex angle of water delivering orifice 21 is 90 degree.The vertical axis of water delivering orifice 21 overlaps with the vertical axis of weir plate 2.
The measuring principle of weir canal formula flowmeter is: the weir plate of given shape is installed in straight channel, is made current overflow this weir plate and earial drainage.According to fluid mechanics principle, exist corresponding conversion relation between the depth of water of overflow and the flow.In other embodiment of the present utility model, the water delivering orifice on the weir plate also can be rectangle or other shapes.Present embodiment is an example to fall isosceles triangle only.
The opening degree of depth of water delivering orifice 21 (being the distances of weir plate 2 coboundarys to the drift angle of water delivering orifice 21) is d, and the A/F of water delivering orifice 21 is b.
Weir plate 2 is divided into first section 13 and second sections 14 with the cell body of measuring flume 1.First section 13 Upstream section that flows to as fluid wherein, second section 14 tract of discharging as fluid.
For making fluid flow state stable, thereby guarantee measuring accuracy, in this example, the A/F b of first section 13 length f and water delivering orifice 21 is satisfied: f=2.5 * b.
Be fixed with scale 3 by bolt or viscose glue on the medial surface of first section 13 sidewall.Scale 3 is k to the air line distance of weir plate 2.For guaranteeing measuring accuracy, the opening depth d of k and water delivering orifice 21 should satisfy: k 〉=3 * d.
According to fluid mechanics knowledge, there are linear relationship in the degree of depth and fluid flow value that fluid covers scale.In the present embodiment, what the scale of scale 3 was represented is flow, and scale is with Q=1400h
5/2(L/s) the non-homogeneous scale that calculates.Wherein, Q is the fluid flow value, and h is that fluid is crossed the weir degree of depth, and promptly when drop in second section 14 inside, liquid level is apart from the degree of depth of the drift angle 22 of water delivering orifice 21 by water delivering orifice 21 for first section 13 internal flow.
Regulate measuring flume 1 level when being convenient for measuring, be provided with the balance plate 4 of rectangle between the first side wall 11 and second sidewall 12.Balance plate 4 is positioned at first section 13 top.Balance plate 4 materials preferably adopt not yielding material, for example iron and steel, organic glass etc.The top of the first side wall 11 and second sidewall 12 is fixed at the two ends of balance plate 4 respectively by bolt or viscose glue.Balance plate 4 is parallel with the base plate 15 of measuring flume 1.The middle part of balance plate 4 is fixed with spirit-leveling instrument 5, and spirit-leveling instrument 5 adopts spirit level.For making things convenient for laying, carrying of flowmeter, be welded with handle 6 respectively on the lateral surface of the first side wall 11 of measuring flume 1 and the lateral surface of second sidewall 12.
In the time will utilizing the flow of weir of the present utility model canal formula flow measurement water gaging, weir of the present utility model canal formula flowmeter is put into water according to water (flow) direction, guarantee that promptly the current in the measuring flume 1 should flow to second section 14 inside by water delivering orifice 21 from first section 13 internal flow.Regulate measuring flume 1 approximate horizontal, treat that current are steady, and current cover the numerical value of observing on the scale 3 by current and read the flow of current by measuring flume 1 when not flooding weir plate.
Weir of the present utility model canal formula flowmeter has following advantage:
(1) flowmeter of the present utility model conveniently moves and installs with respect to the weir body of permanent fixation.
(2) flowmeter of the present utility model is provided with the straight channel (promptly first section 13) of reasonable length before weir plate, makes fluid flow state stable, thereby guarantees measuring accuracy.
(3) flowmeter of the present utility model appropriate distance place behind weir plate be provided with can the direct representation flow scale.Scale of the present utility model directly is scaled flow according to being applicable to flow of the present utility model-water level relational expression with water level, makes things convenient for the user to read net result.
(4) flowmeter measuring flume cell body of the present utility model is provided with the balance plate that spirit-leveling instrument is housed, can be when placing flowmeter according to the balance plate leveling, thus make institute's measurement of discharge accuracy higher, the error when reducing low discharge and measuring.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. weir canal formula flowmeter, comprise measuring flume, the measuring flume internal fixation has weir plate, described weir plate is divided into first section and second section with the cell body of described measuring flume, be fixed with scale on the medial surface of described first section sidewall, have water delivering orifice on the described weir plate, it is characterized in that, be fixed with spirit-leveling instrument on the described measuring flume in order to the floor level degree between second sidewall of the first side wall of checking described measuring flume and described measuring flume.
2. weir according to claim 1 canal formula flowmeter is characterized in that, is provided with balance plate between described the first side wall and described second sidewall, and described balance plate is parallel with the base plate of described measuring flume, and the middle part of described balance plate is fixed with described spirit-leveling instrument.
3. weir according to claim 2 canal formula flowmeter is characterized in that described balance plate is positioned at described first section top.
4. weir according to claim 1 canal formula flowmeter is characterized in that described spirit-leveling instrument is a spirit level.
5. weir according to claim 1 canal formula flowmeter is characterized in that, described water delivering orifice is for falling isosceles triangle, and the drift angle of described water delivering orifice is 90 degree, and the vertical axis of described water delivering orifice overlaps with the vertical axis of described weir plate.
6. weir according to claim 5 canal formula flowmeter is characterized in that, the A/F b of described first section length f and described water delivering orifice satisfies: f=2.5 * b.
7. weir according to claim 5 canal formula flowmeter is characterized in that described scale is k to the air line distance of described weir plate, and the opening depth d of k and described water delivering orifice satisfies: k 〉=3 * d.
8. weir according to claim 1 canal formula flowmeter is characterized in that, is fixed with handle respectively on the lateral surface of the lateral surface of described the first side wall and described second sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201138627U CN202048938U (en) | 2011-04-18 | 2011-04-18 | Trench weir type flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201138627U CN202048938U (en) | 2011-04-18 | 2011-04-18 | Trench weir type flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202048938U true CN202048938U (en) | 2011-11-23 |
Family
ID=44989244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201138627U Expired - Fee Related CN202048938U (en) | 2011-04-18 | 2011-04-18 | Trench weir type flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202048938U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439984A (en) * | 2013-08-23 | 2013-12-11 | 中国农业科学院农田灌溉研究所 | Device for flow rate control and measurement in water pumping test |
| FR2998367A1 (en) * | 2012-11-21 | 2014-05-23 | S T E P P Solutions De Traitement Des Eaux Publiques Et Privees | Device for measuring flow of liquid effluents such as water from treatment station, has piezometric probe that is placed inside gauging chamber on one of set of side walls and casing, where probe is arranged in lower part of casing |
| CN103968896A (en) * | 2014-05-23 | 2014-08-06 | 黑龙江省科学院火山与矿泉研究所 | Small-flow outcrop spring flow measuring device |
| CN104457859A (en) * | 2014-11-12 | 2015-03-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Method for transforming shape of section of measuring weir and measuring weir structure |
| CN105133549A (en) * | 2015-09-01 | 2015-12-09 | 甘肃省祁连山水源涵养林研究院 | Triangular measurement weir |
| CN105526976A (en) * | 2015-12-30 | 2016-04-27 | 中国科学院地理科学与资源研究所 | Flow measuring device and method |
| CN105606168A (en) * | 2016-03-24 | 2016-05-25 | 东北林业大学 | Flow monitoring device for water drainage pipe in center of tunnel |
| CN109117579A (en) * | 2018-08-30 | 2019-01-01 | 沈阳云仿科技有限公司 | A kind of design and calculation method of multi-hole orifice flowmeter |
| CN110017874A (en) * | 2019-04-24 | 2019-07-16 | 中国水利水电科学研究院 | Runoff measuring device and diameter flow measuring method |
| CN111854864A (en) * | 2020-07-24 | 2020-10-30 | 国电大渡河流域水电开发有限公司龚嘴水力发电总厂 | Non-full pipe liquid flow measuring device |
-
2011
- 2011-04-18 CN CN2011201138627U patent/CN202048938U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2998367A1 (en) * | 2012-11-21 | 2014-05-23 | S T E P P Solutions De Traitement Des Eaux Publiques Et Privees | Device for measuring flow of liquid effluents such as water from treatment station, has piezometric probe that is placed inside gauging chamber on one of set of side walls and casing, where probe is arranged in lower part of casing |
| CN103439984A (en) * | 2013-08-23 | 2013-12-11 | 中国农业科学院农田灌溉研究所 | Device for flow rate control and measurement in water pumping test |
| CN103968896A (en) * | 2014-05-23 | 2014-08-06 | 黑龙江省科学院火山与矿泉研究所 | Small-flow outcrop spring flow measuring device |
| CN103968896B (en) * | 2014-05-23 | 2017-02-22 | 黑龙江省科学院火山与矿泉研究所 | Small-flow outcrop spring flow measuring device |
| CN104457859A (en) * | 2014-11-12 | 2015-03-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Method for transforming shape of section of measuring weir and measuring weir structure |
| CN105133549A (en) * | 2015-09-01 | 2015-12-09 | 甘肃省祁连山水源涵养林研究院 | Triangular measurement weir |
| CN105526976B (en) * | 2015-12-30 | 2018-10-19 | 中国科学院地理科学与资源研究所 | Flow measurement device and method |
| CN105526976A (en) * | 2015-12-30 | 2016-04-27 | 中国科学院地理科学与资源研究所 | Flow measuring device and method |
| CN105606168A (en) * | 2016-03-24 | 2016-05-25 | 东北林业大学 | Flow monitoring device for water drainage pipe in center of tunnel |
| CN109117579A (en) * | 2018-08-30 | 2019-01-01 | 沈阳云仿科技有限公司 | A kind of design and calculation method of multi-hole orifice flowmeter |
| CN109117579B (en) * | 2018-08-30 | 2022-12-27 | 沈阳云仿致准科技股份有限公司 | Design calculation method of porous orifice plate flowmeter |
| CN110017874A (en) * | 2019-04-24 | 2019-07-16 | 中国水利水电科学研究院 | Runoff measuring device and diameter flow measuring method |
| CN111854864A (en) * | 2020-07-24 | 2020-10-30 | 国电大渡河流域水电开发有限公司龚嘴水力发电总厂 | Non-full pipe liquid flow measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20140418 |