CN102840930B

CN102840930B - Pipeline internal temperature measuring device

Info

Publication number: CN102840930B
Application number: CN201210299806.6A
Authority: CN
Inventors: 林鹏; 李庆斌; 胡昱; 周绍武; 汪志林; 黄荣
Original assignee: Tsinghua University; China Three Gorges Corp
Current assignee: Shanghai Gaoqian Software Technology Co ltd; China Three Gorges Corp
Priority date: 2012-08-21
Filing date: 2012-08-21
Publication date: 2014-06-04
Anticipated expiration: 2032-08-21
Also published as: CN102840930A

Abstract

Provided is a pipeline internal temperature measuring device. A three-way joint with screws is arranged on an end portion of an inlet-outlet water pipe which is pre-embedded in large-size concrete, and a water stopping and heat insulating ring is inserted in the three-way joint so as to guarantee that an internally-inserted digital temperature sensor can be safely inserted in. A hollow screw pin and the temperature sensor are screwed in the three-way joint so that the hollow screw pin can generate sufficient pressure on the water stopping and heat insulation ring and leakage can not happen under water pressure. A probe of temperature sensor is exactly arranged at the center of a three-way joint water pipe. The temperature detecting range of the internally-inserted temperature sensor is from -10 DEG C to 60 DEG C. The accuracy within a working range is from -0.3 DEG C to 0.3 DEG C. After being subjected to heat insulation treatment with the pipe wall, the temperature measuring device can eliminate interference of the outside temperature on temperature measuring, accurately measure water temperature at an inlet and an outlet, and accurately forecast internal heat exchange volume of the large size concrete.

Description

Pipe interior temperature measuring equipment

Technical field

Patent of the present invention is a kind of pipe interior temperature measuring equipment, especially concrete water flowing water pipe inside temperature measurement device.

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 the hydration heat temperature stress causing 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 cooling site test of concrete water pipe on Ou Waxi (Owyhee) arch dam, united states bureau of reclamation in the process of building Hoover Dam (Hoover) first in concrete storehouse comprehensive pre-buried cooling water pipe carry out manually cooling, since having played comparatively ideal temperature controlled anticracking effect.Cooling water pipe, with features such as dirigibility, reliability and the versatilities of its application, is widely adopted in the construction of countries in the world concrete dam.

Hydroelectric project water flowing cooling technology complexity, be engineering construction design and research important content, water flowing refrigerating work procedure is a temperature objectives control procedure, according to designing requirement, adjust the concrete temperature (reduce or heat up) in each stage, or be controlled near certain temperature spot.But in actual application, artificially, the correlative factor such as experience, weather and water pipe material, water flowing temperature and flow all can directly affect temperature control effect, how large volume concrete structural is carried out to effective intelligent temperature control is the key problem of being concerned about in Hydraulic Design and 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 to cooling water pipe turnover water temperature Measurement accuracy.The measurement of Inlet and outlet water temperature at present adopts mercury thermometer directly in water, to measure conventionally, manually opening at the scene water pipe with regard to needs like this measures, or the hand-held temperature sensor measurement that discharges water, and carry out field notes, the means that usually show as in practice so at the scene fall behind, and low precision, data reliability are low.For reducing risk, the controlled cooling of guarantee construction time temperature of cracking, just must break away from dependence, the employing interpolation type Digital Measurement of Temperature sensor of temperature control to personnel and carry out Measurement accuracy, thereby collect and pass in and out accurately water temperature variation, and then control water flowing flow, reach the object that forms seamless large volume concrete structural, still there is no at present the systematic study work of this respect both at home and abroad.

Summary of the invention

Fall behind in order to overcome the difficulty that existing hand data collection mode obtains continuously to data and to overcome means, the deficiency such as low precision, data reliability are low, the 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 dam concrete cooling water pipe is imported and exported continuously, and can get rid of preferably the impact of extraneous weather temperature on measurement result.

The technical solution adopted for the present invention to solve the technical problems is: pipe interior temperature measuring equipment, and it comprises:

A threeway, the horizontal tube left and right 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 and temperature sensor are connected and fixed by the vertical tube internal thread of hollow screw and threeway.

Wherein in the vertical tube of threeway, bottom arranges adiabatic sealing ring, and top arranges hollow screw, and temperature sensor inserts threeway horizontal tube inside through hollow screw and adiabatic sealing ring.

Temperature sensor is made up of temperature sensor probe and wire, and wire is electrically connected with temperature sensor probe.

It also comprises Temperature sampler, and it is electrically connected with wire, by the temperature wireless of temperature sensor measurement or wired acquisition terminal machine that sends to.

Described adiabatic sealing ring forms by sealing with adiabatic bi-material, and bottom is encapsulant, and top is thermal insulation material.

Described temperature sensor probe termination is positioned on threeway horizontal tube axis.

Described pipeline inner fluid is water.

Wherein adiabatic sealing ring is the adiabatic ring of sealing, and preferably the adiabatic ring of sealing is made up of sealing and adiabatic bi-material, and bottom is sealing material, and top is thermal insulation material.

One is carried out the inside thermometric device of turnover heat exchange medium in real time to pre-buried heat-exchange tube two ends, mass concrete inside, comprises above-mentioned arbitrary device, and above-mentioned arbitrary device is connected to heat-exchange tube.

Wherein heat interchange can be that to heat can be also cooling.

Wherein heat exchange medium can be that water can be also that steam can also be air.

A kind of purposes of pre-buried heat-exchange tube two ends, mass concrete inside being carried out to the thermometric device of inner turnover heat exchange medium in real time, inside turnover heat exchange temperature measurement is in real time carried out in pre-buried heat-exchange tube two ends, mass concrete inside, described device comprises above-mentioned arbitrary device, and above-mentioned arbitrary device is connected to heat-exchange tube.

Owing to there is sealed, thermally insulated ring, can ensure that temperature sensor probe does not contact with threeway and outside air, has improved measuring accuracy.

Hollow screw and temperature sensor are screwed in threeway vertical tube, make hollow screw can produce to the adiabatic ring of sealing that enough contention effects are unlikely to be revealed under hydraulic pressure, and temperature sensor probe be able to be positioned on threeway horizontal tube axis.

Preferably interpolation temperature sensor temperature-measuring range-10 ° c ~ 60 ° c, in working range, precision is ± 0.3 DEG C.Temperature measuring equipment passes through the insulation with tube wall, can get rid of the interference of outside air temperature to thermometric, and the water temperature that Measurement accuracy is imported and exported can Accurate Prediction mass concrete internal heat exchange amount.

Concrete water flowing water pipe interpolation type Water temperature digital measurement mechanism provided by the invention, its effect is as follows:

(1) owing to adopting intelligent data acquisition, store and transmit the data of the digital thermometer measurement being arranged on cooling water pipe, data acquisition continuously, in real time, conveniently and reliably, realized to water flowing water temperature automatically, 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, time saving and energy saving, measuring accuracy is high and be swift in response.

(2) temperature sensor probe 2 terminations are positioned at water pipe axis, fully contact with thermometric object, have ensured the precision of thermometric.

(3) waterproof, the adiabatic adiabatic ring 4 of sealing can prevent the impact of outside air temperature on thermometric, have ensured the accuracy of data.

(4) temperature measurement system is easy to install and use, practical, application at the scene.

Brief description of the drawings

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 temperature measurement device is overlooked and cut-open view.

Fig. 2 temperature measurement device front section view.

Fig. 3 temperature measurement device side sectional view.

Fig. 4 interpolation type digital water-temperature measurement mechanism actual installation figure.

1. threeways in figure, 2. temperature sensor probe, 3. wire, the 4. adiabatic ring of sealing, 5. hollow screw, 6. cooling water pipe, 7. water pipe interpolation type digital water-temperature measurement mechanism.

Embodiment

(1) threeway 1 left and right, lower end two-port is furnished with screw thread, is connected respectively with water flowing water pipe 6, sees Fig. 4.

(2) threeway 1 upper port is furnished with screw thread, and adiabatic sealing ring 4 is put into compression from upper port, and temperature sensor is inserted from upper port and the adiabatic ring of sealing, and temperature sensor probe 2 is positioned on the axis of threeway end portion.

(3) hollow screw 5 is connected with threeway 1 upper port by screw thread, and the adiabatic ring 4 of sealing, temperature sensor probe 2 and wire 3 are fixed, and wire 3 lower ends are electrically connected with temperature sensor probe 2 upper ends.

(4) wire 3 is by connecting Temperature sampler, directly by wireless the temperature reading of measurement mechanism or wired acquisition terminal machine that sends to.

Claims

1. A device for measuring the temperature of the heat exchange medium in and out of the heat exchange pipe embedded in the mass concrete in real time, comprising a temperature measurement device inside the pipe, the temperature measurement device inside the pipe is connected to the heat exchange pipe, its features is that

The internal temperature measuring device of the pipeline includes a tee, the left and right ports of the horizontal tube of the tee are respectively connected with the pipeline of the heat exchange tube to be tested, and the vertical tube of the tee is provided with an insulating sealing ring, a hollow screw and a temperature sensor , the heat insulating sealing ring and the temperature sensor are connected and fixed by the hollow screw and the internal thread of the vertical pipe of the three-way, wherein the lower part of the vertical pipe of the three-way is provided with the heat-insulating sealing ring, and the upper part is provided with the hollow screw, the temperature sensor is inserted into the horizontal pipe of the tee through the hollow screw and the heat insulating sealing ring;

The temperature sensor is composed of a temperature sensor probe and a wire, and the wire is electrically connected to the temperature sensor probe; the end of the temperature sensor probe is located on the central axis of the horizontal pipe of the tee;

The temperature measuring device inside the pipeline also includes a temperature collector, the temperature collector is electrically connected to the wire, and transmits the temperature measured by the temperature sensor to the collection terminal wirelessly or wiredly;

The heat-insulating sealing ring is a water-stop and heat-insulating ring, and the water-stop and heat-insulating ring is composed of water-stop and heat-insulating materials, the lower part of which is a water-stop material, and the upper part is a heat-insulating material; contact with outside air;

The hollow screw and the temperature sensor are screwed into the vertical pipe of the tee, so that the hollow screw can exert sufficient pressure on the water-stop and heat-insulating ring so as not to leak under water pressure, and the temperature sensor probe It can be located on the central axis of the three-way horizontal pipe; the temperature measurement range of the interpolated temperature sensor is -10°C to 60°C, and the accuracy within the working range is ±0.3°C;

The heat exchange in the heat exchange tube is heating or cooling, and the medium of the heat exchange is water or air.