Background technology
The water flowing of large-scale hydroelectric project mass concrete cools, and is to solve the technical measures that hydroelectric project dam concrete hydration heat temperature stress that causes and the envelope arch grouting temperature that reaches designing requirement must be taked.Since united states bureau of reclamation in 1931 has carried out the site test that concrete water pipe cools off on Ou Waxi (Owyhee) arch dam; United states bureau of reclamation in the process of building Hoover Dam (Hoover) first in the concrete storehouse comprehensive pre-buried cooling water pipe carry out manual work cooling, played since the comparatively ideal temperature controlled anticracking effect.Cooling water pipe is extensively adopted in the construction of countries in the world concrete dam with characteristics such as its application flexibility, reliability and versatilities.
Hydroelectric project water flowing cooling technology is complicated; Be engineering construction design and research important content, the water flowing refrigerating work procedure is a temperature objectives control procedure, promptly according to designing requirement; Adjust the concrete temperature (reducing or intensification) in each stage, or be controlled near certain temperature spot.But in the actual application; Artificially, experience, weather and correlative factors such as water pipe material, water flowing temperature and flow all can directly influence temperature control effect, how large volume concrete structural is carried out effective intelligent temperature control is the key problem of being concerned about in water conservancy project design and the construction always.Concrete cooling water-flowing data is mainly Inlet and outlet water temperature and water flowing flow, solve this key problem, and prerequisite is that cooling water pipe turnover water temperature is accurately measured.The measurement of Inlet and outlet water temperature at present adopts mercury thermometer directly in water, to measure usually; So just needing manual work to open water pipe at the scene measures; The measurement that discharges water of perhaps hand-held temperature sensor; And carry out field notes, and the means that usually show as in the practice so at the scene fall behind, and low precision, data reliability are low.Be risk, the cooling of assurance construction time Controllable Temperature that reduces cracking; Just must break away from temperature control accurately measures personnel's dependence, employing interpolation type numeral temperature probe; Thereby collect and pass in and out the water temperature variation accurately; And then control water flowing flow, reach the purpose that forms seamless large volume concrete structural, still there is not the systematic study work of this respect at present both at home and abroad.
Summary of the invention
In order to overcome difficulty that the existing manual data acquisition modes obtains data continuously and to overcome means and fall behind; Deficiency such as low precision, data reliability are low; The present invention provides the inner water flowing cooling water pipe of a kind of large-sized concrete water temperature inside digital measuring device; This device can not only obtain the water temperature that the dam concrete cooling water pipe is imported and exported continuously, and can get rid of the influence of extraneous weather temperature to measurement result preferably.
The technical solution adopted for the present invention to solve the technical problems is: the pipe interior temperature measuring equipment, and it comprises:
A threeway; The horizontal tube left and right sides port of threeway is connected with pipe under test respectively; Adiabatic sealing ring, hollow screw and temperature sensor are set in the vertical tube of threeway, and adiabatic sealing ring leans on the hollow screw to be connected with the vertical tube internal thread of threeway with temperature sensor and fixes.
Wherein the bottom is provided with adiabatic sealing ring in the vertical tube of threeway, and top is provided with the hollow screw, and temperature sensor passes the hollow screw and adiabatic sealing ring inserts threeway horizontal tube inside.
Temperature sensor is made up of temperature sensor probe and lead, and lead is electrically connected with temperature sensor probe.
It also comprises Temperature sampler, and it is electrically connected with lead, with temperature wireless or wired acquisition terminal machine that sends to of temperature sensor measurement.
Said adiabatic sealing ring is made up of sealing and adiabatic two kinds of materials, and the bottom is an encapsulant, and top is thermal insulation material.
Said temperature sensor probe termination is positioned on the threeway horizontal tube axis.
Said pipeline inner fluid is a water.
Wherein adiabatic sealing ring is the adiabatic ring of sealing, and the adiabatic ring of preferred sealing is made up of sealing and adiabatic two kinds of materials, and the bottom is a sealing material, and top is thermal insulation material.
A kind of the inside thermometric device of turnover heat exchange medium is in real time carried out at pre-buried heat-exchange tube two ends, mass concrete inside, comprise above-mentioned arbitrary device, above-mentioned arbitrary device is connected to heat-exchange tube.
Wherein heat interchange can be heat also can be the cooling.
Wherein heat exchange medium can be that water also can be that steam can also be air.
A kind of purposes of pre-buried heat-exchange tube two ends, mass concrete inside being carried out the thermometric device of inner turnover heat exchange medium in real time; Inside turnover heat exchange temperature measurement is in real time carried out at pre-buried heat-exchange tube two ends, mass concrete inside; Said device comprises above-mentioned arbitrary device, and above-mentioned arbitrary device is connected to heat-exchange tube.
Owing to have sealed, thermally insulated ring, can guarantee that temperature sensor probe does not contact with threeway and outside air, has improved measuring accuracy.
Hollow screw and temperature sensor are screwed in the threeway vertical tube, make hollow screw to produce the unlikely leakage under hydraulic pressure of enough contention effects to the adiabatic ring of sealing, and temperature sensor probe be able to be positioned on the threeway horizontal tube axis.
Plug in temperature sensor temperature-measuring range-10 ° c ~ 60 ° of c in preferred, precision is ± 0.3 ℃ in working range.Temperature measuring equipment passes through the insulation with tube wall, can get rid of the interference of outside air temperature to thermometric, accurately measures the water temperature of importing and exporting, and can accurately predict mass concrete internal heat exchange amount.
Concrete water flowing water pipe interpolation type water temperature digital measuring device provided by the invention, its effect is following:
(1) owing to adopts intelligent data acquisition; Storage and transmission are installed in the digital thermometer data measured on the cooling water pipe; Data acquisition continuously, in real time, conveniently and reliably; Realized automatic, online, real-time testing and data transmission, solved that manual testing's recorded information feedback is slow, low precision and the low shortcoming of data reliability the water flowing water temperature, time saving and energy saving, measuring accuracy is high and be swift in response.
(2) temperature sensor probe 2 terminations are positioned at the water pipe axis, fully contact with the thermometric object, have guaranteed the precision of thermometric.
(3) waterproof, the adiabatic adiabatic ring 4 of sealing can prevent the influence of outside air temperature to thermometric, have guaranteed the accuracy of data.
(4) the temperature measurement system is easy to install and use, practical, application at the scene.