CN207991706U - Pipeline liquid sensor for measuring temperature - Google Patents
Pipeline liquid sensor for measuring temperature Download PDFInfo
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- CN207991706U CN207991706U CN201820294993.1U CN201820294993U CN207991706U CN 207991706 U CN207991706 U CN 207991706U CN 201820294993 U CN201820294993 U CN 201820294993U CN 207991706 U CN207991706 U CN 207991706U
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- temperature
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- signal converter
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Abstract
A kind of pipeline liquid sensor for measuring temperature disclosed by the utility model; mouth, which is connect, including both sides passes through thread seal and the waterproof three-way connection (1) of piping connection, the temperature signal converter (3) for being formed with closed metal shield and multicore waterproof socket (4); wherein; temperature-sensing probe (2) with protective case passes through the vertical joint of waterproof three-way connection to stretch into both sides and connects that mouth is hollow to meet in flow tube body, and the cable of temperature-sensing probe is connected by vertical joint hollow stem on the terminal of temperature signal converter corresponding circuits；When temperature-sensing probe experiences the temperature of tested quantity of fluid, temperature signal is converted into resistance signal using internal temperature-sensing element (device) (5), resistance signal is converted by current signal by signaling conversion circuit (6) again, current signal is exported by multicore waterproof socket, is acquired for external collecting device.The utility model response is fast, voltage endurance capability is high, resistance to marine environment ability is strong, have good Electro Magnetic Compatibility, flow resistance is small and is easily installed.
Description
Technical field
The utility model is related to liquid and the sensors of vapor (steam) temperature in a kind of measurement sealing pipeline.
Background technology
In research and production and social life, it is frequently encountered the problem of fluid temperature (F.T.) measures.Due to the ermal physics of fluid
Property, flow parameter and environmental condition are multifarious, need the temperature sensor that suitable type is selected according to the requirement of measurement
And measurement method.To measure the true temperature of fluid, it is necessary to make the temperature at sensor temperature-sensing element and fluid temperature (F.T.) phase
Deng, but due to the presence of heat conduction heat flux and radiant heat flux so that advection heat of the fluid to sensor is certainly existed when thermal balance
Stream, i.e., there will necessarily be the temperature difference, to bring measurement error between fluid and sensor temperature-sensing element.By heat conduction heat flux and radiant heat flux
Caused temperature measurement error is referred to as conduction error and radiation error.Since the mobility of medium has " pulling one hair and move the whole body "
The characteristics of, the change of defeated medium, the variation of local pipe transport condition, the adjustment of operating parameter, equipment of pumping station failure, medium
Leakage etc. all can cause the hydraulic regime of fluid media (medium) in pipeline to change, especially in unexpected start and stop pump, rapid switching valve
When, with pressure change dramatically will occur for the flow velocity in pipeline on each section of medium, and the stable state of conduit running is by broken
It is bad.Transition is above occurred suddenly for this pipeline pressure in production, the unstable state that may jeopardize pipeline and equipment safety is referred to as
For water attack.Water attack can cause the fluctuating change of Media density, pipeline pressure and the synchronous generating period of pipeline section product in pipeline
Change, this periodic variation be easy to cause pipe vibration, and may have serious consequences.
In complicated pipe-line system, the temperature that conventional fluid temperature sensor measures working fluid in pipeline can be tied
The limitation of structure, space and environmental factor.For certain positions on pressure duct, installation is needed to measure pipeline internal liquid temperature
Sensor usually requires that temperature sensor can bear high pressure, adapts to marine environment, and have good Electro Magnetic Compatibility, conventional
Temperature sensor cannot meet the requirements.In order to measure the liquid temperature in complicated pipe-line system, prior art generally use point
Cloth fibre optic temperature sensor continuously measures the Temperature Distribution along pipeline, the method based on software, according to computer acquisition system
In real time acquisition pipeline flow, pressure, temperature and other data, using the variation of flow or pressure, material or momentum balance, be
The principles such as system dynamic model, barometric gradient, are calculated by software and leakage are detected and are positioned.Utilize the temperature change of pipeline
Judge that content leaks cause the leakage of the variation generation of ambient temperature more than a certain range.Such methods are mainly to reality
When the temperature that acquires, flow, pressure signal analyze and handle in real time, detect leakage with this and position.And it needs
Pipe ends install pressure sensor, and the waveform that specific instantaneous pressure drop is captured by upstream and downstream pressure sensor is let out
It fails to judge disconnected, the time difference of the pressure signal received according to upstream and downstream pressure sensor and the spread speed of suction wave make leakage
Point.And the flow for outputting and inputting flow or detecting pipe ends pumping plant of detection pipe road multi-point is also needed to, and by signal
Summarize and constitute mass flow balance image, the degree of leakage and rough position can determine according to the variation characteristic of image.It measures
Process is complicated, and heavy workload is inconvenient to use.
Duct type temperature sensor/transmitter can be divided into two kinds of wind pipe type and waterpipe type by using pipeline type.Shell is adopted
It is made of PC materials, there is stainless steel probe, and built-in A grades of standard platinum resistance or NTC thermistor be as temperature-sensing element,
There are many probe length is available.With the spies such as small, light-weight, precision is high, fast response time, long-time stability are good
Point.Application-specific integrated circuit processing chip and temperature-compensating operational amplification circuit are commonly provided with inside transmitter, by tested temperature transition at
Corresponding standard signal is professional application in single point temperature measuring apparatus in HVAC duct system.Water pipe temperature sensor/
Transmitter can be used for measuring the medium temperatures such as air-conditioner water system and refrigerant.There are many probe lengths and housing combination for choosing
It selects.In pipeline operating mode complexity, satisfactory inspection is hardly resulted in based on above-mentioned water pipe temperature sensor/transmitters sense technology
Survey effect.
It can be divided into internal detection method and external detection method according to detection device present position difference in detection process.Inside inspection
Survey method refers to that detection device is placed in inside pipeline or is walked or fixed, and the internal state by measuring pipeline is detected.Outside
Portion's detection method refers to the detection carried out outside pipeline by being laid with the various methods such as sensitive media or installation sensor.Based on letter
The mode of number processing is classified, in terms of the technological difficulties of detection method are data processing.It is different according to the mode to signal processing,
It is classified as three classes：Method based on residual analysis, the method based on signal analysis and based on the method for artificial intelligence.Based on residual
The basic thought of method this method of difference analysis is that the measured value that will contain certain leakage information reacts real under No leakage state
The residual error that the reference value of border operation carries out both comparisons is to analyze the foundation of leakage presence or absence.Since such method mostly needs
Want the mathematical model of resume pipeline.According to the difference to residual analysis method, but can be divided into relevant function method, frequency response method and
State estimate.The essence of relevant function method the relevant technologies is that the similitude of two signals is investigated in time delay domain, including from phase
It closes and two contents of cross-correlation.Whether such methods occur to leak mainly for pipeline liquid and the position of leakage is judged,
The actual value of pipeline liquid temperature cannot be obtained.
The utility model is required according to specific, is further developed and is changed to what prior art temperature sensor carried out
Into providing a kind of alternative pipeline liquid measuring temperature sensor.
Invention content
The purpose of this utility model is place in view of the deficiency of the prior art, provide a kind of thermometric speed it is fast,
Accurate positioning, cost are low, and high pressure resistant, resistance to marine environment has good Electro Magnetic Compatibility and is easily installed, and is used for pipeline liquid
The sensor that temperature measures.
The purpose of this utility model can be reached by the following measures.A kind of pipeline liquid sensor for measuring temperature, packet
It includes：Both sides connect mouth and pass through thread seal and the waterproof three-way connection of piping connection, the temperature signal for being formed with closed metal shield
Converter and multicore waterproof socket, it is characterised in that：Temperature-sensing probe with protective jacket passes through the vertical of waterproof three-way connection to connect
Head stretches into both sides and connects that mouth is hollow to meet in flow tube body, and the cable of temperature-sensing probe passes through vertical joint hollow stem and connects temperature signal conversion
On the terminal of device corresponding circuits；When temperature-sensing probe experiences the temperature of tested quantity of fluid, built-in temperature-sensing element believes temperature
Number it is converted into resistance signal, resistance signal is converted into current signal by signaling conversion circuit, and current signal passes through the anti-water cutting of multicore
Head is exported, and is acquired for external acquisition system.
Environment capacity.Signaling conversion circuit increases EMC Design, increase is filtered, and makes it have good electromagnetism
Compatibility.
The utility model has the following effects that compared with the prior art.
Thermometric speed is fast.Fusiform temperature-sensing probe is inserted in inside waterproof three-way connection by the utility model, is in direct contact
Liquid, pipeline is interior without movable member, and flow resistance is small, does not interfere the flow condition of fluids within pipes, almost without additional pressure in measurement
Power is lost；Sensor temperature-sensing probe is simple in structure, small, can be rapidly reached equalized temperature with fluid to be measured, improve response
Speed；Temperature-sensing probe is stainless steel material with media contact part, and service life is long；Simple installation, it is easy to maintain.The survey of use
Electric bridge is measured, simple in structure, high sensitivity, measurement range is wide, and Linearity is good, and temperature-compensating easy to implement can meet and answer well
Become the requirement measured.
The waterproof three-way connection connecting line of the utility model three-port structure, accurate positioning, cost are low, waterproof threeway
Connector is fixed by three ear mounting holes, and it is the metal hollow body of rod for traversing pipe diameter that both sides, which connect mouth, passes through screw thread
It is connected with pipeline, it is quick and easy for installation.Stainless steel material waterproof three-way connection and temperature-sensing probe can tolerate high pressure.Select corrosion resistant
The material of erosion and it is sealed design, there is stronger resistance to marine environment ability.
The utility model temperature signal converter inside circuit has carried out EMC Design, using being formed with closed metal screen
The temperature signal converter of body is covered, box cavity is pasted with the conductive material for absorbing the electromagnetic wave that extraneous transmitting comes, makes it
With good Electro Magnetic Compatibility.
High certainty of measurement, measurement range are big.The utility model, which uses, is mounted on temperature-sensing probe sense inside waterproof three-way connection
By the temperature of tested quantity of fluid, temperature signal is converted into resistance signal, electric current is converted into using temperature signal converter
Signal is exported by multicore waterproof plug, no movable member, not by the shadow of temperature, pressure, density and conductivity variations
It rings；High certainty of measurement, measurement range is big, and temperature-sensing probe measurement range can reach -70 DEG C~300 DEG C.The mathematics of pipeline is not needed
Model, the requirement to input signal is relatively low, and calculation amount is also little, can carry out on-line real-time measuremen, does not also need complicated mathematics
Model, can be carried out continuously detection, and with memory function, adaptable, rate of false alarm is low, accuracy of detection is high, it is sensitive, can detect
Go out slight temperature, it is smaller to carry out embedded required input to it using the technology.It can accurately forecast pipeline liquid temperature
Operation conditions, to pipeline progress continuous on-line detection suitable for adverse circumstances, the variation and false alarm that it can also be according to environment,
Automatic to correct update network parameter, the strong accuracy of detection of anti-noise jamming ability is high, can detect pipeline liquid temperature in seconds
Degree, detects state of temperature in time, has the response speed being exceedingly fast, and reduces loss and wins the quality time.Compared to time-domain analysis,
The advantages of with saving the time, improving detection speed.
The utility model is suitable for the pipe-line system of the different types specifications such as serial pipe, parallel pipeline, lateral, can
For pipelines diameter, many convenience are brought to type selecting and use.
Description of the drawings
Fig. 1 is the utility model pipeline liquid sensor for measuring temperature organigram.
Fig. 2 is the front view of Fig. 1.
Fig. 3 is the sectional view of temperature sensor structure.
Fig. 4 is the sectional view of temperature signal converter.
Fig. 5 is temperature signal converter circuit principle schematic.
Fig. 6 is the schematic diagram of the signal conversion of Fig. 5.
Fig. 7 is the filter circuit principle schematic of Fig. 5.
In figure：1. waterproof three-way connection, 2. temperature-sensing probes, 3. temperature signal converters, 4. multicore waterproof sockets, 5. temperature-sensitives
Element, 6. signaling conversion circuits, 7. fairleads, 8. mounting holes, 9. first gasket seals, 10. second gasket seals, 11. cover boards,
12. temperature signal converter shell.
The utility model is further illustrated with reference to the accompanying drawings and examples, but is not therefore limited in the utility model
Among the embodiment described range.
Specific implementation mode
- Fig. 4 refering to fig. 1.In the embodiment described below, pipeline liquid sensor for measuring temperature is mainly by waterproof threeway
Connector 1, temperature-sensing probe 2, signal conversion combination 3 and multicore waterproof socket 4 form.Wherein, temperature-sensing probe 2 is spindle shape,
It is intended to reduce the flow resistance of temperature-sensing probe.Temperature-sensing probe 2 is assemblied in 1 vertical joint hollow tube of waterproof three-way connection, works as liquid
When flowing through pipeline, temperature-sensing probe can be contacted directly with the liquid in pipeline, experience fluid temperature, improve responding ability.Temperature
12 inner cavity of signal adapter box case, four wall is pasted with the EMC Designs measure such as conductive material.
Waterproof three-way connection 1 can determine length and diameter with piping connection screw thread according to the actual demand of pipeline.Waterproof three
1 sealing surface of pass joint is generally configured to 74 ° of sealing cones of standard.In order to improve the pressure-resistant and resistance to marine environment of the utility model
Stainless steel or other performances more preferably material can be selected in the material of ability, waterproof three-way connection 1.In order to reduce temperature-sensing probe 2
Flow resistance generally selects temperature-sensing probe stainless steel to be designed to that fusiform, thickness can be calculated according to practical pressure-resistant demand.
The signaling conversion circuit 6 being screwed built in temperature signal converter 3 is visited temperature-sensitive by signaling conversion circuit
The resistance signal that head is drawn is converted into current signal.There are three ear for 12 cuboid sides system of temperature signal converter case body case
Mounting hole, for fixing the utility model.Stainless steel or aluminium alloy can be selected in the material of temperature signal converter case body case 12,
If selecting aluminium alloy, outer surface need to spray protective paint.
Temperature-sensing element 5 shown in Fig. 3 built in temperature-sensing probe 2, temperature-sensing probe 2 is built-in to draw its resistance signal using four-wire system
Temperature-sensing element 5, the lead-out wire of temperature-sensing element 5 draws from fairlead 7, then is connected with signaling conversion circuit.The essence of temperature-sensing element 5
Degree is selected according to actual demand.For temperature-sensing element 5 according to the selection of material and temperature-sensing element, the temperature-measuring range of temperature sensor structure is general
It can reach -70 DEG C~300 DEG C.The heat-conducting silicon rubber of temperature-sensing element 5 or other Embedding Materials are encapsulated in temperature-sensing probe 2
Portion.To ensure that the intensity and sealing performance of the utility model, temperature-sensing probe 2 use and is weldingly fixed on 1 cavity of waterproof three-way connection
It is internal.
Waterproof three-way connection 1 is fixed on by mounting hole 8 on temperature signal converter 3, and gasket seal, temperature are placed in centre
The closed metal shield of signal adapter, makes it have good Electro Magnetic Compatibility.To ensure leakproofness, temperature signal conversion
The first gasket seal 9, multicore waterproof socket 4 and temperature signal converter box body are placed between device box case 12 and cover board 11
The second gasket seal 10 is placed between shell 12.For the radiation protection in electromagnetic protection, temperature signal converter case is external
Paste the conductive material for absorbing the electromagnetic wave that extraneous transmitting comes in 12 inner cavity of shell.
Refering to Fig. 5.Temperature signal converter includes：The electromagnetic interface filter of the external DC 28V power supplys of connection and the suppression of power supply transient state
Circuit processed, filter circuit DC/DC conversion modules in sequential series, secondary filtering circuit, precision 10V reference power sources.DC/DC is converted
Module select 15V~50V wide operating voltage ranges low voltage operating, 15V power supplys and give electric bridge provide precision 10V reference power sources
With the power amplification circuit being made of operational amplifier and triode.Electromagnetic interface filter is by power supply transient state suppression circuit and adopts
With capacitor-discharge, input, out-put supply are filtered, DC 28V are become by+15V, -15V power supply by power source combination PSU
With accurate 10V power supplys.Temperature signal converter input power is internal circuit use+15V.
Refering to Fig. 6.Temperature signal converter includes bridge circuit and instrument amplifier, wherein temperature signal converter
Bridge circuit is connected in parallel on the arm resistance device R3 and temperature-sensitive of power supply negative terminal by being connected in parallel on arm resistance device R1, R2 of power positive end
The double bridge circuit composition that platinum resistance Rt is constituted, temperature-sensitive platinum resistance Rt change according to the variation of ambient temperature.Arm resistance
Device R1, R2, R3 can be 3 precision wire-wound resistors, since conversion accuracy is influenced by the precision of 3 precision wire-wound resistors,
Therefore the accuracy selection of this 3 resistors of arm resistance device R1, R2, R4 is 0.01%.Temperature signal converter receives temperature-sensitive and visits
First 2 experience ambient temperature, and temperature change causes the variation of resistance value, change the variation of output voltage by the variation of resistance value.
Circuit design sensor wire terminal, even if the distance between measuring instrumentss and sensor can reduce cable direct current if very long
Error caused by resistance.Instrument amplifier can be precision instrument amplifier, and instrument amplifier includes the magnifier that is connected,
Parallel resistance R4, R5 for constituting instrument amplifier amplification factor, the zero-bit output voltage of amplifier in regulation meter amplifying circuit
Resistance RP1, adjust the resistance RP2 of the full journey output voltage of amplifier.
Refering to Fig. 7.The filter circuit being connected with magnifier, including being connected in parallel between power supply VCC and ground terminal GND
Capacitor C1, Transient Suppression Diode V2 and be connected on capacitor C1 and Transient Suppression Diode V2 parallel circuit output ends
Diode V1, protective resistance R.The characteristics of filter circuit is to use various filters part, can absorb external high frequency to low
The various interference signals of frequency can fully absorb, good wave filtering effect particularly with the various interference signals of power cord conduction.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain that profit requires.
Claims (10)
1. a kind of pipeline liquid sensor for measuring temperature, including：Both sides connect waterproof three of the mouth by thread seal and piping connection
Pass joint（1）, be formed with the temperature signal converter of closed metal shield（3）With multicore waterproof socket（4）, it is characterised in that：
Temperature-sensing probe with protective jacket（2）Across waterproof three-way connection（1）Vertical joint stretch into both sides and connect that mouth is hollow to meet flow tube body
In, temperature-sensing probe（2）Cable pass through vertical joint hollow stem connect temperature signal converter（3）On the terminal of corresponding circuits,
Impression is tested the temperature of quantity of fluid, passes through built-in temperature-sensing element（5）Temperature signal is converted into resistance signal, is converted through signal
Circuit（6）Resistance signal is converted into current signal, current signal passes through multicore waterproof socket（4）It is exported, is adopted for outside
Collect equipment acquisition.
2. pipeline liquid sensor for measuring temperature according to claim 1, which is characterized in that temperature-sensing probe（2）For spindle
Shape, it is intended to reduce the flow resistance of temperature-sensing probe.
3. pipeline liquid sensor for measuring temperature according to claim 1, which is characterized in that temperature-sensing element（5）Extraction
Line is from fairlead（7）It draws, then is connected with signaling conversion circuit.
4. pipeline liquid sensor for measuring temperature according to claim 1, which is characterized in that temperature signal converter（3）
Box case（12）Four wall of inner cavity is pasted with conductive material.
5. pipeline liquid sensor for measuring temperature according to claim 1, which is characterized in that temperature-sensing element（5）Use heat conduction
Silicon rubber or other Embedding Materials are encapsulated in temperature-sensing probe（2）Inside, temperature-sensing probe（2）Using being weldingly fixed on waterproof three
Pass joint（1）In cavity.
6. pipeline liquid sensor for measuring temperature according to claim 1, which is characterized in that waterproof three-way connection（1）It is logical
Cross mounting hole（8）It is fixed on temperature signal converter（3）On, gasket seal, the closed gold of temperature signal converter are placed in centre
Belong to shield.
7. pipeline liquid sensor for measuring temperature according to claim 1, which is characterized in that temperature signal converter packet
It includes：The electromagnetic interface filter and power supply transient state suppression circuit of the external DC 28V power supplys of connection, filter circuit DC/DC in sequential series turn
Change the mold block, secondary filtering circuit, precision 10V reference power sources.
8. pipeline liquid sensor for measuring temperature according to claim 1, which is characterized in that temperature signal converter includes
Bridge circuit and instrument amplifier, wherein the bridge circuit of temperature signal converter is by being connected in parallel on the arm resistance of power positive end
Device R1, R2 are connected in parallel on the double bridge circuit composition that the arm resistance device R3 and temperature-sensitive platinum resistance Rt of power supply negative terminal are constituted, temperature-sensitive
Platinum resistance Rt changes according to the variation of ambient temperature.
9. pipeline liquid sensor for measuring temperature according to claim 1, which is characterized in that be connected with magnifier
Filter circuit, including the capacitor C1 being connected in parallel between power supply VCC and ground terminal GND, Transient Suppression Diode V2 and connecting
Diode V1, protective resistance R on capacitor C1 and Transient Suppression Diode V2 parallel circuit output ends.
10. pipeline liquid sensor for measuring temperature according to claim 1, which is characterized in that temperature signal converter case
Body case（12）With cover board（11）Between be placed with the first gasket seal（9）, multicore waterproof socket（4）With temperature signal converter
Box case（12）Between be placed with the second gasket seal（10）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820294993.1U CN207991706U (en) | 2018-03-02 | 2018-03-02 | Pipeline liquid sensor for measuring temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820294993.1U CN207991706U (en) | 2018-03-02 | 2018-03-02 | Pipeline liquid sensor for measuring temperature |
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| Publication Number | Publication Date |
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| CN207991706U true CN207991706U (en) | 2018-10-19 |
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ID=63825187
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| CN201820294993.1U Active CN207991706U (en) | 2018-03-02 | 2018-03-02 | Pipeline liquid sensor for measuring temperature |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387324A (en) * | 2018-03-02 | 2018-08-10 | 成都凯天电子股份有限公司 | Pipeline internal medium temperature measuring transducer |
| CN109297209A (en) * | 2018-10-23 | 2019-02-01 | 中国科学院理化技术研究所 | The temperature of refrigeration or heat pump system working medium measurement component and refrigeration or heat pump system |
| CN109544891A (en) * | 2018-11-30 | 2019-03-29 | 黄维 | A kind of waterpower on-site data gathering device |
| CN113834600A (en) * | 2021-09-23 | 2021-12-24 | 北京昆仑海岸科技股份有限公司 | Anti-freezing pressure transmitter |
| CN115371752A (en) * | 2022-08-08 | 2022-11-22 | 重庆川仪自动化股份有限公司 | Pipeline type thermal gas mass flowmeter |
-
2018
- 2018-03-02 CN CN201820294993.1U patent/CN207991706U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387324A (en) * | 2018-03-02 | 2018-08-10 | 成都凯天电子股份有限公司 | Pipeline internal medium temperature measuring transducer |
| CN109297209A (en) * | 2018-10-23 | 2019-02-01 | 中国科学院理化技术研究所 | The temperature of refrigeration or heat pump system working medium measurement component and refrigeration or heat pump system |
| CN109544891A (en) * | 2018-11-30 | 2019-03-29 | 黄维 | A kind of waterpower on-site data gathering device |
| CN113834600A (en) * | 2021-09-23 | 2021-12-24 | 北京昆仑海岸科技股份有限公司 | Anti-freezing pressure transmitter |
| CN115371752A (en) * | 2022-08-08 | 2022-11-22 | 重庆川仪自动化股份有限公司 | Pipeline type thermal gas mass flowmeter |
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