CN201269766Y - High precise flowmeter for dam leakage - Google Patents
High precise flowmeter for dam leakage Download PDFInfo
- Publication number
- CN201269766Y CN201269766Y CNU2008201852348U CN200820185234U CN201269766Y CN 201269766 Y CN201269766 Y CN 201269766Y CN U2008201852348 U CNU2008201852348 U CN U2008201852348U CN 200820185234 U CN200820185234 U CN 200820185234U CN 201269766 Y CN201269766 Y CN 201269766Y
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Abstract
The utility model discloses a high-precision flow meter for measuring the seepage flow of a dam; the high-precision flow meter is provided with a measuring circuit and consists of a container which is composed of a base plate, a shell and a covering board, a plurality of supporting rods which are arranged around the base plate, a motor arranged on the container, a level switch in the container, a water inlet pipe which is inserted into an open slot at the upper part of the shell of the container, a rotating bar which connects a water inlet of the water inlet pipe with an output shaft of the motor, and a water discharging pipe which is provided with a water discharging valve and connected with a water outlet on the base plate. The flow meter has the advantages of simple structure, convenient use, high automation degree, simple and scientific measuring principle, large range of measure range ratio and high measuring precision; fluid to be measured can be measured at any time and flow out in time so as to prevent fouling deposits from affecting the measuring precision, therefore, the flow meter is particularly applicable to the long-term and reliable seepage flow measurement under a small-flow and multi-impurity measuring environment at outlets of dam pipes.
Description
Technical field
The utility model relates to a kind of flowmeter of monitoring the dam infiltration amount, is particularly useful for the mouth of pipe seepage flow monitoring of dam, belongs to hydraulic structure seepage flow surveying instrument field.
Background technology
At present, domestic and international monitoring for the dam infiltration amount mainly contains three kinds of methods: pressure differential method, weir method and volumetric method.
The ultimate principle of differential pressure flowmeter institute foundation is Bernoulli Jacob's a energy conservation equation.When fluid when being arranged on ducted throttling element, cause a fluid stream local contraction, its flow velocity improves, pressure reduces.The pressure reduction of these throttling element both sides is relevant with the flow that passes through.Flow is big more, and pressure reduction is big more, so can utilize this pressure reduction to measure flow.It is comparatively clean fluid that this flowmeter requires fluid, in fluid impurity more for a long time, true with regard to indeterminacy, or even wrong.
The weir method is exactly to allow treat that fluid measured flows through the weir plate of definite shape (as triangular-notch weir, rectangular weir etc.), is calculated the flow for the treatment of fluid measured by the height of measuring the head of fluid on weir plate in conjunction with the corresponding different experimental formula of difformity.This flow is in respect of a fatal defective, is exactly very little or weir plate when reason such as long-pending changes shape owing to dirt applies when flow, fitting formula will with the field condition grave fault, the flow that calculates is also just very inaccurate, or even wrong.
Volumeter mainly contains two kinds of forms at present: turbo flow meter and tipping bucket type flowmeter.
The principle of turbo flow meter be with fluid partitioning in many discontinuous single volumes (being equivalent to batch box), the sum of cumulative throughflow meter unit volume is obtained flow then.This flowmeter mainly is to be used for measuring clean fluid, when liquid contains more impurity, scale formation will occur, and then causes blocking measuring tube, can not measure.
The tipping bucket type flowmeter mainly is that the number of times of tipping bucket upset in the unit of account time is obtained flow.The range ratio of this flowmeter is very little.Measure the just big flow of energy measurement not of low discharge, measure just energy measurement low discharge not of big flow.In addition, owing to carry out volume calculations by calculating tipping bucket upset number of times, its error is also bigger.Also have, after the long-term upset of tipping bucket, its tipping bucket inside also can fouling, influences the calculating of volume, and then influences measuring accuracy.
At present, (≤1L/s) measurement mainly is to adopt artificial method to the little seepage flow of dam, promptly manually goes to receive fluid measured with a measuring cup, and recording liquid is full of the used time of measuring cup, and then calculates the flow of fluid.This method measuring accuracy is higher relatively, but needs great amount of manpower, and efficient is too low, can't satisfy the actual demand of modern hydraulic engineering seepage flow monitoring.
Summary of the invention
Technical problem to be solved in the utility model is, overcomes the shortcoming of existing flowmeter incompatibility dam infiltration low discharge, many impurity monitoring of environmental, and a kind of large dam seepage quantity high precision flow gauge is provided.
The technical scheme in the invention for solving the technical problem is as follows: a kind of large dam seepage quantity high precision flow gauge, has metering circuit, it is characterized in that forming and comprise: a container that constitutes by base plate, housing, cover plate, several are loaded on the support bar of container floor periphery, a motor that is contained on the container, a level switch that places container, a water inlet pipe that is inserted in the shell of tank upper opening groove, a dwang that connects water inlet pipe water inlet and motor output shaft, a drainpipe that draining valve is housed and is connected with freeing port on the container floor.
The further technical scheme that the utility model solves its technical matters is as follows:
1, described draining valve is a solenoid valve, is directly controlled by metering circuit;
2, described draining valve is mechanical draining valve, by motor drives, have that form by coupling shaft, pillar, shaft coupling and link gear water inlet pipe dwang interlock, coupling shaft one end connects motor output shaft, the other end connects shaft coupling, shaft coupling is connected with the spool of draining valve is coaxial, and protective pipe sleeve is on coupling shaft;
3, this flowmeter also has the bedplate of fixedly connected support bar lower end;
4, described support bar has height adjusting structure.
The course of work of the utility model large dam seepage quantity high precision flow gauge is as follows: container is installed in treats near the fluid measured water delivering orifice, the water inlet position of water inlet pipe is lower than treats the fluid measured water delivering orifice, water inlet pipe can be driven along shell of tank upper opening groove by motor, dwang and rotate corresponding central angle (for example open slot is the circular arc of corresponding 90 ° of central angles, and water inlet pipe is rotatable 90 ° central angle just).When not measuring, the water inlet of water inlet pipe leaves treats the fluid measured water delivering orifice, and the draining valve on the drainpipe is an open mode, treats that fluid measured can not enter container, directly walks from the container outer flow, and is emptying state in the container.During measurement, drive water inlet pipe and rotate by metering circuit control motor, dwang along shell of tank upper opening groove, turn to until the water inlet of water inlet pipe and to treat under the fluid measured water delivering orifice, to treat fluid measured introducing container, meanwhile, the draining valve on the drainpipe is closed in metering circuit control, the fluid measured for the treatment of that enters container triggers level switch respectively in beginning liquid level, end liquid level, the signal that level switch is sent clock beginning respectively, clocks and finish, metering circuit just can calculate the flow (computing formula: flow=volume/time) for the treatment of fluid measured.In case level switch sends the signal that clocks and finish, the metering circuit just water inlet of may command water inlet pipe is rotated away from and treats the fluid measured water delivering orifice, and opens the draining valve on the drainpipe, gets back to the state when not measuring, and waits for next time and measuring.
The beneficial effects of the utility model are as follows: the utility model flowmeter structure is simple, easy to use, the automaticity height, the simple and clear science of measuring principle, the range ratio scope is big, the measuring accuracy height, treat that fluid measured measures at any time, immediately flow away, can not produce dirt deposition and influence the problem of measuring accuracy, be particularly suitable under dam mouth of pipe seepage flow low discharge, many impurity monitoring of environmental, carrying out the seepage flow monitoring stably in a long term.
Description of drawings
Fig. 1 is the one-piece construction cut-open view of the utility model large dam seepage quantity high precision flow gauge.
Embodiment
With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in further detail.But the utility model is not limited to given example.
As shown in Figure 1, the utility model large dam seepage quantity high precision flow gauge, has metering circuit (not drawing among the figure), its composition comprises: one by base plate 15, housing 13, the container that cover plate 7 constitutes, several are loaded on the support bar 17 of container floor 15 peripheries, a motor 9 that is contained on the container, a level switch 3 that places container, a water inlet pipe 11 that is inserted in the shell of tank upper opening groove 12, the drainpipe 1 that the water inlet 111 of a connection water inlet pipe 11 and 10, one of the dwangs of motor output shaft 91 are equipped with draining valve 16 and are connected with freeing port 2 on the container floor 15.4 is the level switch guide pole among the figure, fixedlys connected with container cover plate 7 in the upper end of guide pole 4.Among the embodiment, motor 9 is installed on the container cover plate 7, and engine casing (Eng Cas) 8 is fixedlyed connected with cover plate 7.
Draining valve 16 on the utility model flowmeter drainpipe 1 can adopt solenoid valve, is directly controlled by metering circuit.Also can adopt mechanical valve.Among the embodiment shown in Figure 1; machinery draining valve 16 is driven by motor 9; have by coupling shaft 6, pillar 5, shaft coupling 14 link gears that link with water inlet pipe dwang 10 that form; coupling shaft 6 one ends connect motor output shaft 91; the other end connects shaft coupling 14; shaft coupling 14 is connected with the spool of draining valve 16 is coaxial, and pillar 5 is enclosed within on the coupling shaft 6, and protection coupling shaft 6 makes it not contact with the fluid measured for the treatment of that enters container.When driving water inlet pipes 11 by dwang 10, metering circuit control motor turns to along the open slot 12 on shell of tank 13 tops when treating under the fluid measured water delivering orifice, simultaneously also by the coupling shaft 6 of link gear, the spool that shaft coupling 14 rotates draining valve 16, close draining valve, otherwise, when driving water inlet pipes 11 by dwang 10, metering circuit control motor leaves when treating the fluid measured water delivering orifice, also by the coupling shaft 6 of link gear, the spool of shaft coupling 14 backward rotation draining valves 16, open draining valve simultaneously.
For the ease of the utility model flowmeter being installed in the measure field level, guarantee measuring accuracy, as shown in Figure 1, the further feature of the utility model is: (1), have a bedplate 18 of fixedly connected support bar 17 lower ends, (2), support bar 17 has height adjusting structure, for example sleeve structure or helical structure.
Among the embodiment, the open slot 12 on the utility model flowmeter shell of tank 13 tops is the circular arc of corresponding 90 ° of central angles.
Claims (6)
1, large dam seepage quantity high precision flow gauge, has metering circuit, it is characterized in that forming and comprise: a container that constitutes by base plate, housing, cover plate, several are loaded on the support bar of container floor periphery, a motor that is contained on the container, a level switch that places container, a water inlet pipe that is inserted in the shell of tank upper opening groove, a dwang that connects water inlet pipe water inlet and motor output shaft, a drainpipe that draining valve is housed and is connected with freeing port on the container floor.
2, large dam seepage quantity high precision flow gauge according to claim 1 is characterized in that described draining valve is a solenoid valve, is directly controlled by metering circuit.
3, large dam seepage quantity high precision flow gauge according to claim 1, it is characterized in that described draining valve is mechanical draining valve, by motor drives, have that form by coupling shaft, pillar, shaft coupling and link gear water inlet pipe dwang interlock, coupling shaft one end connects motor output shaft, the other end connects shaft coupling, and shaft coupling is connected with the spool of draining valve is coaxial, and protective pipe sleeve is on coupling shaft.
4,, it is characterized in that having the bedplate of fixedly connected support bar lower end according to claim 1 or 2 or 3 described large dam seepage quantity high precision flow gauges.
5,, it is characterized in that described support bar has height adjusting structure according to claim 1 or 2 or 3 described large dam seepage quantity high precision flow gauges.
6, large dam seepage quantity high precision flow gauge according to claim 4 is characterized in that described support bar has height adjusting structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201852348U CN201269766Y (en) | 2008-08-27 | 2008-08-27 | High precise flowmeter for dam leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201852348U CN201269766Y (en) | 2008-08-27 | 2008-08-27 | High precise flowmeter for dam leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269766Y true CN201269766Y (en) | 2009-07-08 |
Family
ID=40842373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201852348U Expired - Lifetime CN201269766Y (en) | 2008-08-27 | 2008-08-27 | High precise flowmeter for dam leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201269766Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101339066B (en) * | 2008-08-27 | 2011-03-30 | 南京南瑞集团公司 | Large dam seepage quantity high precision flow gauge |
-
2008
- 2008-08-27 CN CNU2008201852348U patent/CN201269766Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101339066B (en) * | 2008-08-27 | 2011-03-30 | 南京南瑞集团公司 | Large dam seepage quantity high precision flow gauge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090708 Effective date of abandoning: 20080827 |