CN2522851Y - Two-water-tube type settlement meter - Google Patents

Abstract

A double water pipe type settlement meter consists of a settlement detector, a pipeline, a measurement device, a water supply system and a drainage system; wherein, the settlement detector consists of an overflow pipe, an aeration pipe and a drainage pipe interface arranged in a sealing cylinder. One end of an inlet pipe, an aeration pipe and a drainage pipe arranged in the pipeline are respectively connected with the overflow pipe, the aeration pipe and the drainage pipe interface of the settlement detector, while the other end is communicated with an observation room. The inlet pipe is connected with a measurement pipe of the measurement device and the water supply system. Nozzles of the aeration pipes are kept downwards over floor. The utility model is characterized in that nozzles of the drainage pipes can be elevated and descended and are lower than the water level of the measurement pipe but higher than the bottom part of the sealing cylinder, the inlet pipes and the drainage pipes have the same pipe diameter. The application solves the problem of poor drainage of drainage pipes and promotes the reliability of measured value. The burying mechanism of the applied settlement meter requires no gradient, thus excavation amount and burying time can be reduced, backfill compaction quality can be promoted and project investment can be saved.

Description

Two water-pipe type settlement instruments

Technical field

The utility model relates to a kind of hydraulic engineering instrument, particularly a kind of pair of water-pipe type settlement instrument.

Technical background

Water-pipe type settlement instrument (also claiming Sweden's box abroad) is mechanical type prototype measurement instrument, utilizes connecting pipe principle to measure the inner sedimentation of dam body.Instrument is made up of sedimentation gauge head, pipeline, measurement mechanism and water supply, unwatering system.The sedimentation gauge head is that two vertical tubes and a drain interface are set in a sealed cylindrical, and two vertical tubes are called overflow pipe and snorkel.Pipeline is the plastic tube of three different-diameters; be through in the protective casing; be called water inlet pipe, snorkel and drainpipe; the one end is connected with overflow pipe, snorkel and the drain interface of sedimentation gauge head respectively; the other end feeds the observation room; water inlet pipe is connected with water system with the measurement water pipe of measurement mechanism by the special three-way valve; the snorkel mouth of pipe places above place, ground downwards; its effect is to keep the atmospheric pressure in the gauge head to balance each other with observing the atmospheric pressure in the room; the drainpipe mouth of pipe then places ground or locates near ground, in order to drain the water that overflow pipe overflows.Measurement mechanism constitutes by being installed on water column, T-valve and the water system measured on the plate.During measurement, to the water inlet pipe water-filling, to the overflow of the spilling water mouth of pipe, after stopping water-filling and treating the spilling water mouth of pipe and measurement mechanism water column two ends water surface balance, read water column water surface elevation reading, the difference of two measurement period measured values is sedimentation gauge head and the relative settlement amount of observing the room in two periods, adds the settling amount in observation room itself, is the absolute settlement amount.Water-pipe type settlement instrument is because of sound construction, and measured value is reliable, precision height, and do not have the such zero point drift of Electrical Measuring Instrument, thereby widespread usage in the prototype measurement of earth and rockfill dam, particularly rock at home and abroad.Because the sedimentation in measuring point and observation room, evaporation of water in probe location variation and the water column needs to the water inlet pipe water-filling when this measures at every turn, and the water that overflow pipe overflows is discharged from drainpipe.For water can be discharged in the gauge head of sealing, the caliber of generally going up drainpipe is bigger than water inlet pipe, installs to bury underground also to require pipeline that 1% gradient will be arranged.When pipeline was installed, to observing the room, whole pipeline bedding was pressed 1% gradient leveling basically from measuring point.But, after the pipeline backfill, along with dam embankment, pipeline is sedimentation thereupon, because the inner sedimentation skewness of dam body, or else pipeline has 1% gradient, and counter-slope may occur at a certain section, and pipeline water-filling and spilling water are discontinuity, therefore the water in the drainpipe is discontinuous, contains a large amount of bubbles, particularly high dam, length of pipeline hundreds of rice, water is not easy discharge, and (experimental study of 400m length of pipeline shows, because counter-slope causes the water that overflows in the gauge head cumulative, is difficult to for the moment discharge, when ponding 15-20cm, needed to discharge in 1-2 days).When measuring the frequency more (as the reservoir filling initial stage), or sedimentation development comparatively fast big (gradient reduces), or filling time when long, because the water that overflows is difficult for discharging, in the course of time, water may be full of the gauge head inner chamber, influences measuring value accuracy.If water enters in the snorkel, not only influence measured value stability, gauge head was lost efficacy.On the other hand, 1% bury gradient underground, concerning the following height of dam of 100m level, problem also is not very big, but concerning high dam, influence is just very big.As water cloth a strip of land between hills rock, the longest 520m of pipeline, by 1% gradient, the pipeline upstream and downstream discrepancy in elevation reaches 5.2m.In this way, excavation and backfilling working amount are very big, and the observation room will be built very highly.This just makes the time of burying underground and executive cost increase greatly, and pipeline backfill quality assurance difficulty increases.Therefore, solve the drainage problem of water-pipe type settlement instrument, bury success underground and improve the measuring accuracy, press for and have a realistic meaning guaranteeing water-pipe type settlement instrument.

Summary of the invention

Reason at the water-pipe type settlement instrument impeded drainage, be to have bubble in the drainpipe, make the discontinuous situation of water body in the drainpipe, the application with one of technical matters of solving is: make that water in the drainpipe is also the same with water in the water inlet pipe not to be had bubble and be full of in the pipe, then no matter pipeline has or not counter-slope, even the pipeline bending, as long as head difference is arranged, water in the pipeline in the same old way can continuous flow, discharges smoothly, improves the reliability of measured value.The application also can solve another technical matters simultaneously, promptly eliminate when burying pipeline underground 1% bury the gradient requirement underground, this not only can reduce buries difficulty underground, and can reduce the earth volume of burying engineering underground significantly, thereby reduce expense significantly, and save the duration.

The scheme that solves the problems of the technologies described above, as long as the structure with sedimentation gauge head drainpipe and two pipelines of water inlet pipe makes two communicating pipes that the overflow direction is opposite into, just can solve the problem of smooth draining, the imagination of Here it is two water-pipe type settlement instruments also is the key problem in technology of two waterpipe types.Two water-pipe type settlement instruments, by the sedimentation gauge head, pipeline, measurement mechanism and water supply, unwatering system is formed, the sedimentation gauge head is that two vertical tubes and a drain interface are set in a sealed cylindrical, two vertical tubes are called overflow pipe and snorkel, water inlet pipe in the pipeline, snorkel and drainpipe, the one end respectively with the overflow pipe of sedimentation gauge head, snorkel is connected with drain interface, the other end feeds the observation room, water inlet pipe is connected with water system with the measurement water pipe of measurement mechanism, the snorkel mouth of pipe places above place, ground downwards, it is characterized in that: the mouth of pipe place of drainpipe is provided with jacking gear and (for example the mouth of pipe is fixed on the crane or at the mouth of pipe hanged hook is set, hanger bracket is set in addition), make the mouth of pipe be lower than the water column water level, be higher than the bottom of sedimentation gauge head sealed cylindrical.This structure makes the bottom of sedimentation gauge head sealed cylindrical form a pools zone, and the distance between the base plane of sealed cylindrical and the draining orifice plane is discharge level.That is to say: the distance between draining orifice plane and the water gaging orifice plane equals the distance between the spilling water mouth of pipe and the draining position.This structure makes two communicating pipes that the overflow direction is opposite that become of two pipelines of sedimentation gauge head drainpipe and water inlet pipe, make that water in the drainpipe is also the same with water in the water inlet pipe not to be had bubble and be full of in the pipe, then no matter pipeline has or not counter-slope, even pipeline bending, as long as head difference is arranged, water in the pipeline in the same old way can continuous flow, discharge smoothly.Because drainpipe becomes communicating pipe, its caliber requires and can reduce, so the application's prioritization scheme is: the caliber of drainpipe is identical with the water inlet pipe caliber.

The application has solved in the prior art because the inner sedimentation skewness of dam body, cause and occur counter-slope in the pipeline, make and occur the difficult problem that bubble causes impeded drainage in the drainpipe, make that water in the drainpipe is also the same with water in the water inlet pipe not to be had bubble and be full of in the pipe, then no matter pipeline has or not counter-slope, even the pipeline bending, as long as head difference is arranged, water in the pipeline in the same old way can continuous flow, discharges smoothly, has improved the reliability of measured value.The application has solved the difficult problem when traditional water tubular type sedimentometer is buried underground simultaneously, and the sedimentometer of new construction is buried ditch underground does not need the pipeline gradient, saves and opens amount of excavation and bury the time underground, improves the backfill compacting quality, saves construction investment.With water cloth a strip of land between hills is example, if bury underground with traditional water tubular type sedimentometer, in pipeline length 520m, bury ditch bottom width 2.5m underground, buries the gradient estimation underground by 1%, and it is opened amount of excavation and returns amount of fill respectively is 19208m ³Adopt two water-pipe type settlement instruments, no gradient is buried underground, and it is opened amount of excavation and return amount of fill and respectively is 2308m ³, only be the former 12%.Both compare, and can save out amount of excavation and return amount of fill respectively is 16900m ³This shows that its technical economic benefit and social benefit are fairly obvious, two water-pipe type settlement instruments have wide application future.Eliminated when burying pipeline underground 1% bury the gradient requirement underground, this not only can reduce buries difficulty underground, and can reduce the earth volume of burying engineering underground significantly, thereby reduce expense significantly, and saved the duration, dam is generated electricity in advance, obtained economic benefit is very huge especially.

Description of drawings

Fig. 1 is the two water-pipe type settlement instrument structural representations of the application.

Embodiment

Embodiment 1, with reference to Fig. 1: two water-pipe type settlement instruments, to form by sedimentation gauge head, connecting pipeline, measurement mechanism and water supply, unwatering system, the sedimentometer gauge head is made up of overflow pipe 1, drain connection 2, snorkel 3 and sealed cylindrical housing 4.Communicating pipe and drainpipe all adopt φ 12 * φ 10 nylon tubes, and snorkel adopts φ 14 * φ 12 nylon tubes.Theoretically, snorkel is as long as communicate with air, and caliber can be littler, but for preventing that water droplet or foreign material from stopping up, caliber should be got greatly.Overflow pipe was connected with the water column 5 of observing the room measurement mechanism by communicating pipe, drainpipe is connected with observation room internal drainage mouth 6, freeing port is fixed on the crane, and the mouth of pipe is lower than water column water level 25cm (its discrepancy in elevation is decided according to the vertical tube mouth of pipe and discharge level in the gauge head).Snorkel is fixed in the observation room specially on support or the wall, the mouth of pipe down, in case foreign material fall into.Its principle of work is a doubly-linked siphunculus principle.During measurement to the vertical tube water-filling, until the overflow of vertical tube pipe.The water that overflows raises gauge head tube internal drainage water level 7, because the tube internal drainage water level and the freeing port discrepancy in elevation are certain, the water that overflows promptly flows out from freeing port.This shows, if communicating pipe in be full of water, manage not flat, even pipeline has counter-slope, communicating pipe the water level at two ends can reach equilibrium state.To measuring the pipeline water-filling, the filling time, pipeline length was relevant, is provided by producer by water supply installation pressure head and measurement.Observe whether spilling water of freeing port, if anhydrous overflowing, then gauge head internal drainage water level may be lower than in freeing port or the pipeline bubble, at this moment can be by drainpipe water-filling in gauge head, stop water-filling after, if the freeing port spilling water, illustrate that discharge pipe line is unimpeded, enters next step operation.If freeing port is still anhydrous overflows, can improve the water-filling head and continue water-filling, until the freeing port spilling water, but filled water amount can not surpass 2300cm ³After stopping water-filling, treat stable level (generally needing 3～5 minutes), can read buret water level reading.Regulate the freeing port height then, freeing port and buret water level are differed-25cm.Two water-pipe type settlement instrument principles are simple, and method is feasible, and is rational in infrastructure, simple to operate.

Claims (3)

1, a kind of pair of water-pipe type settlement instrument, by the sedimentation gauge head, pipeline, measurement mechanism and water supply, unwatering system is formed, the sedimentation gauge head is that overflow pipe is set in sealed cylindrical, snorkel and drain interface, water inlet pipe in the pipeline, snorkel and drainpipe, the one end respectively with the overflow pipe of sedimentation gauge head, snorkel is connected with drain interface, the other end feeds the observation room, water inlet pipe is connected with water system with the measurement water pipe of measurement mechanism, the snorkel mouth of pipe places above place, ground downwards, it is characterized in that: the mouth of pipe place of drainpipe is provided with jacking gear, the mouth of pipe is lower than the water column water level, is higher than the bottom of sedimentation gauge head sealed cylindrical.

2, according to described pair of water-pipe type settlement instrument of claim 1, it is characterized in that: drainpipe mouth of pipe place jacking gear is: the mouth of pipe of drainpipe is fixed on the crane.

3, according to claim 1 or 2 described pairs of water-pipe type settlement instruments, it is characterized in that: the caliber of drainpipe is identical with the water inlet pipe caliber.