CN105004399B - Specific heat liquid level gauge - Google Patents
Specific heat liquid level gauge Download PDFInfo
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- CN105004399B CN105004399B CN201510409160.6A CN201510409160A CN105004399B CN 105004399 B CN105004399 B CN 105004399B CN 201510409160 A CN201510409160 A CN 201510409160A CN 105004399 B CN105004399 B CN 105004399B
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Abstract
The invention discloses a kind of specific heat liquid level gauge, it is narrow to solve existing liquid level gauge use scope, the problems such as influence by Test Cycle.There are the circulatory mediators of certain temperature difference with medium to be determined for present invention setting, then the specific heat and heat transfer coefficient difference of medium to be determined and non-medium to be determined in container are utilized, pass through detection temperature of several temperature detecting elements detection in medium to be determined and in non-medium to be determined, the interface of medium to be determined and non-medium to be determined is determined according to the variation of detection temperature, thereby determine that material position, it is not only practical, reliable, but also do not limited by any Test Cycle, have a wide range of application.
Description
Technical field
The present invention relates to a kind of measuring device, in particular to a kind of material level measuring method and realizing this method
Device.
Background technology
In Chemical Manufacture, it is often necessary to the liquid level of container or reaction kettle (hereafter referred to collectively as container) is measured, and liquid level is surveyed
Amount realizes that in the prior art, liquid level gauge mainly includes radar level gauge, ultrasonic level gage, condenser type liquid by liquid level gauge
Position meter, nuclear radiation liquid level gauge.Wherein, ultrasonic level gage cannot measure vacuum state liquid level；Nuclear radiation liquid level gauge can be to human body
Generate radiation injury；There are bubble, the measurement of radar level gauge or ultrasonic level gage that can be disturbed in reaction kettle, reduces and measure
Precision, radar level gauge and ultrasonic level gage can not be suitable for the level gauging of high-temperature medium；Capacitance level gauge cannot
Measure non-conductive medium liquid level.It is found that under non-usable condition, corresponding liquid level gauge measurement accuracy is substantially reduced in conjunction with above-mentioned,
It even cannot normally measure, therefore, existing liquid level gauge narrow application range cannot be satisfied a multi-purpose level gauging.
Invention content
It is an object of the invention to overcome drawbacks described above, provides and a kind of realizing convenient, dependable performance and use scope is wide
Material level measuring method.
To achieve the goals above, the technical solution adopted by the present invention is as follows：
A kind of material level measuring method, setting is through the two in the non-medium to be determined above medium to be determined and its material position
Circulatory mediator, pass through several temperature detecting elements and detect the variation of temperature and determine point of medium to be determined and non-medium to be determined
Interface thereby determines that the material position of medium to be determined；
Wherein, medium to be determined and non-medium to be determined and circulatory mediator be there are the temperature difference, the purpose is to, it is ensured that level measurement
Sensitivity, the temperature difference is bigger, and sensitivity is higher, and medium to be determined and non-medium to be determined have different specific heat and heat transfer coefficient；
The temperature difference of the circulatory mediator and medium to be determined is realized by heating device or cooling device.
Based on heat conduction principle：Temperature detecting element (material position temperature detecting element) is in the big medium of specific heat and heat transfer coefficient
When, circulatory mediator to temperature detecting element (material position temperature detecting element) heat quickly by Absorption of Medium in tank body or band
It walks, the temperature change (rising or falling) of temperature detecting element is less, meanwhile, temperature change is also relatively slow；Work as temperature detecting element
When (material position temperature detecting element) is in the small medium of specific heat and heat transfer coefficient, circulatory mediator gives temperature detecting element (material position temperature
Spend detecting element) heat be difficult by Absorption of Medium or to take away, therefore, temperature detecting element (material position temperature detecting element) temperature
Spend it is higher or lower, meanwhile, temperature change is very fast.
It is as follows that temperature detecting element meets relationship：
If circulatory mediator is heat medium, when the specific heat and heat transfer coefficient of medium to be determined are more than non-medium to be determined
When, the material position temperature detecting element being located in medium to be determined, the temperature of detection is less than the material being located in non-medium to be determined
Position temperature detecting element；When the specific heat of medium to be determined and heat transfer coefficient are less than non-medium to be determined, it is located at medium to be determined
In material position temperature detecting element, detection temperature be higher than be located at non-medium to be determined in material position temperature detecting element；
If circulatory mediator is refrigerant, when the specific heat and heat transfer coefficient of medium to be determined are more than non-medium to be determined
When, the material position temperature detecting element being located in medium to be determined, the temperature of detection is higher than the material being located in non-medium to be determined
Position temperature detecting element；When the specific heat of medium to be determined and heat transfer coefficient are less than non-medium to be determined, it is located at medium to be determined
In material position temperature detecting element, detection temperature be less than be located at non-medium to be determined in material position temperature detecting element.
Liquid and gas interface can be determined at which according to the change rate of the temperature of several temperature detecting elements and temperature
Current signal corresponding with liquid level is sent out at a temperature detecting element and by transmitter.
Temperature detecting element includes material position temperature detecting element and medium temperature detecting element, wherein material position temperature is examined
It surveys element to be mainly used for receiving the heat of container inner medium and circulatory mediator, the selection of material position temperature detecting element and number should
There are one meeting at least in medium to be determined, meanwhile, it should also be as at least one in non-medium to be determined；Medium temperature is examined
The temperature that element is used to measure container inner medium is surveyed, the purpose is to：One, judge the calculating parameter of interface；Two, it is to judge to hold
The parameter that medium temperature is distributed in device determines the foundation of the temperature of heating liquid or refrigerating fluid.
Medium temperature detecting element can arranged for interval, specifically according to the temperature of container inner medium whether uniformly and temperature
Whether the signal wire of detecting element is easy arrangement to determine, but need to ensure：As long as at the height for having medium temperature detecting element
Just there is material position temperature detecting element, and also has several material position temperature detections between the two endpoint material position temperature detecting elements
Element；If medium temperature is uniform, the signal wire of several material position temperature detecting elements is connected one with regard to one,
Only each signal wire of head and the tail two is drawn out to transmitter；If medium temperature is uneven, several material positions
The signal wire of temperature detecting element all directly leads out transmitter；
When container inner medium temperature it is relatively uniform in other words up and down temperature it is consistent when, material position temperature detecting element setting it is close
The signal wire for spending constant temperature detecting element at endpoint is directly sent to transmitter, and the material position temperature detection between endpoint is first
The signal wire of part is one another in series, and the signal wire at both ends is connected to transmitter；When non-uniform temperature, each material position temperature detection member
The signal wire of part is all directly sent to transmitter.The setting of material position temperature detecting element number be not dependent on container inner medium temperature and be
It is no consistent, but depending on measuring the required precision of material position.
If container inner medium need not be heated or be cooled down, circulatory mediator selects hot circulating medium and SAPMAC method
Medium can be with；
According to medium for the sensibility of temperature, determine the temperature of circulatory mediator, if container inner medium need heat and
Time is longer, at this point, the circulatory mediator of selection heat, if container inner medium needs to freeze and the time is longer, at this point, selection is cold
Thus circulatory mediator is conducive to energy saving；Wherein, it refers to heating and having if having in container that heating time is longer with cooling time
Refrigerating operation, then the time it is longer refer to refrigeration and heating time relatively long operation.
If there is stirring action in container, the fluctuation of caused liquid level on outer tube is splashed for the spray that stirring drives, it can
To be pocessed by moving average filtering；
If container inner medium temperature is uniform, an elongated resistance can be placed between circulation fluid and medium, is passed through
The size for measuring this resistance can determine the liquid level of container；
If placing the closed room of fixed volume between medium and circulation fluid, room has the gas of fixed mass, then
By the change transitions of gas in container temperature at the variation of gas pressure liquid level can be determined by measuring pressure.
This method is to reach the measurement purpose of material position with heat transfer coefficient difference using the specific heat of different medium, therefore, this
Invention additionally provides a kind of level measuring method, applies the liquid that material level measuring method as described above measures liquid material
Position.Meanwhile the present invention also provides a kind of solid material material level measuring method, applying material level measuring method as described above
Measure the material position of solid material.
The present invention also provides a kind of devices for realizing material level measuring method as described above, including are inserted into medium to be determined
In circulation pipe, and be infused in circulation pipe and have with medium to be determined the circulatory mediator of the temperature difference, the circulation pipe top
Expose from medium to be determined；
Further, several be arranged above and below and mutual heat-insulated material position temperature detection is provided in the cycle pipe outer wall
Element, and the material position temperature detecting element in medium to be determined and non-medium to be determined in be respectively provided at least there are one；
Further, outer tube is glued with outside the material position temperature detecting element, the outer wall of the outer tube contacts institute
State medium to be determined；According to the etching characteristic of medium, the outer tube of suitable material is selected；Outer tube is determined according to the pressure of medium
The thickness of wall；
Further, further include transmitter, the transmitter receives the detection signal of all temperature detecting elements and sends out
Current signal corresponding with material position.
Further, the circulation pipe is U-typed circulation pipe, and the U-typed circulation pipe is connected with heating device or cooling
Device is simultaneously connected thereto the circulation loop for constituting circulatory mediator, the heating device or cooling device for manufacture circulatory mediator with
The temperature difference between medium to be determined.
Further, when the U-typed circulation pipe is connected with heating device, the heating device includes being stored with heating
The heating liquid case of liquid is provided circulation power for heating liquid by transmitter control and is pumped, the heating heated to heating liquid
Liquid heating device；The pump inlet by heat liquid pipe connect with the heating liquid case, pump discharge by heating liquid pipe with it is described
The import of U-typed circulation pipe connects, and the outlet of the U-typed circulation pipe is connect by heating liquid pipe with the heating liquid case.Its
In, microwave heating, electrical heating or the heating of electromagnetic oven principle etc. may be used in heating liquid heating device.The circulation power of circulatory mediator
It is provided by pump.
Further, pressure inverting in heating liquid case thermometer and heating liquid case is additionally provided in the heating liquid case
Device, the transmitter receive the heating liquid case thermometer and heat the detection signal of pressure transmitter in liquid case.
Further, when the U-typed circulation pipe is connected with cooling device, the cooling device includes by the pick-up
The outlet of the refrigeration source device of device control, the refrigeration source device is connect by refrigerator pipes with the import of the U-typed circulation pipe,
The import of the refrigeration source device is connect by refrigerator pipes with the outlet of the U-typed circulation pipe.Wherein, refrigeration source device can be with
Select compressor or other refrigeration equipments, refrigeration source that freon (or other materials) can be selected.The circulation power of circulatory mediator
It is provided by refrigeration source device (compressor or pump).Cooling device cools down the gas looped back, at this point, selecting compression
Machine carries out cooling operations, if the medium looped back is non-gaseous medium, selects heat exchanger or cooler to carry out medium cold
But the power of operation, medium circulation is provided by pump.
Further, it is additionally provided with cryogenic temperature meter in the refrigerator pipes, positioned at the exit of the refrigeration source device
And pressure transmitter, the transmitter receive the detection signal of the cryogenic temperature meter and pressure transmitter.
Further, the circulatory mediator in the circulation pipe and medium to be determined be there are the temperature difference, and medium to be determined and its
Non- medium to be determined above material position has different specific heat and heat transfer coefficient.
Further, if container carries agitating device, resistance to stirring support is additionally provided among the U-typed circulation pipe
Pipe.
Further, the influence in order to avoid bridging to measurement accuracy, the present apparatus further include for removing the outer tube
The material scraper of outer wall bridging.Heat transfer coefficient is caused to decline fouling, time constant increase or even accuracy decline etc. are more serious
Situation, can be by periodically removing cleaning.
When the specific heat of medium to be determined and heat transfer coefficient are more than non-medium to be determined, the material position in medium to be determined
Temperature detecting element, the temperature of detection are less than the material position temperature detecting element being located in non-medium to be determined；
When the specific heat of medium to be determined and heat transfer coefficient are less than non-medium to be determined, the material position in medium to be determined
Temperature detecting element, the temperature of detection are higher than the material position temperature detecting element being located in non-medium to be determined.
When the temperature difference of circulatory mediator and medium to be determined is less than setting value, then it is assumed that outer tube corrodes or wear and leakage,
It is out of service immediately, and maintenance of alarming；Wherein, setting value is depending on specific circulatory mediator and medium to be determined.
Further, it is contemplated that energy saving, the circulatory mediator gap cycle of the U-typed circulation pipe.
Further, it is contemplated that saving construction cost when the container has more while to measure liquid level, can share heating dress
It sets or cooling device.
Further, when heating operation in container and close cooling down operation time, the liquid level gauge can have simultaneously to be added
Thermal and cooling device.
Further, there is temperature control system in the transmitter so that circulatory mediator temperature tracks medium temperature to be determined
Degree variation, guarantee have rational temperature difference.Simultaneously according to the liquid level of container inner medium in charging, processing, discharging different phase
Pace of change is different, and the transmitter is automatic to control temperature difference either according to process signal or according to manual operation signal, with
Adapt to the requirement of liquid level pace of change.
Further, the container inner medium temperature is uniform, can be come true according to the temperature difference of the inlet and outlet of circulation fluid
The liquid level of constant volume device.
Further, liquid medium gasification needs heat in the container, and therefore, boundary temperature may be minimum, can
One of basis for estimation can be determined as interface.
Further, the influence to the heat transfer of gas phase is much larger than to the heat transfer of liquid phase due to stirring, it is easier to
Determine the position of interface, therefore, the liquid level gauge is more suitable for measuring the liquid level with stirring container.
Further, it is provided with temperature control system in the transmitter so that circulatory mediator temperature tracks Jie to be determined
Matter temperature change ensures temperature difference between the two.It is different in charging, processing, discharging according to the liquid level of container inner medium simultaneously
The pace of change in stage is different, and the transmitter is automatic to control temperature either according to process signal or according to manual operation signal
Difference, to adapt to the requirement of liquid level pace of change.
Compared with prior art, the invention has the advantages that：
There are the circulatory mediators of certain temperature difference with medium to be determined for present invention setting, then utilize medium to be determined in container
It is different with heat transfer coefficient with the specific heat of non-medium to be determined, it is in medium to be determined and non-by the detection of several temperature detecting elements
Detection temperature in medium to be determined determines the boundary of medium to be determined and non-medium to be determined according to the variation of detection temperature
Face thereby determines that material position, not only practical, reliable, but also is not limited by any Test Cycle, has a wide range of application.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention-embodiment 1.
Fig. 2 is the structural schematic diagram of the present invention-embodiment 2.
Fig. 3 is the structural schematic diagram of the present invention-embodiment 3.
Fig. 4 is the structural schematic diagram of the present invention-embodiment 4.
Fig. 5 is the structural schematic diagram of the present invention-embodiment 5.
Fig. 6 is the structural schematic diagram of the present invention-embodiment 6.
Fig. 7 is the structural schematic diagram of the present invention-embodiment 7.
Fig. 8 is the structural schematic diagram of the present invention-embodiment 8.
Fig. 9 is the portions the A enlarged diagram of the present invention-embodiment 3.
Figure 10 is the portions the B enlarged diagram of the present invention-embodiment 4.
Figure 11 is the portions the C enlarged diagram of the present invention-embodiment 7.
Figure 12 is the portions the D enlarged diagram of the present invention-embodiment 8.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include but not limited to
The following example.
Embodiment 1
As shown in Figure 1, by taking level gauging as an example, present embodiments provide it is a kind of based on the level measurement for measuring liquid level,
That is fluid level measuring gauge, the fluid level measuring gauge is using the liquid feature different from gaseous specific heat and heat transfer coefficient, in conjunction with circulation fluid
(circulatory mediator), by the detection of several temperature detecting elements in the liquid phase with detection temperature in gas phase, according to detection temperature
Change to determine liquid level position.
Specifically, which includes U-typed circulation pipe, 106 part of cooling device, insertion portion and transmitter
Composition；Wherein, cooling device is by compressor 101, freon pipe 102, Freon 10 4, cryogenic temperature meter 105, pressure transmitter
103 and thermal insulation material oblique line filling composition.Insertion portion is by flange 107, material position temperature detecting element 108, material position temperature detection
Element 110, medium temperature detecting element 111, the heat-insulating material 109 for completely cutting off temperature detecting element, outer tube 112 form.
Transmitter 106 receives all temperature detecting element signals, pressure transmitter signal and externally fed power supply, and transmitter is to compressor
Power supply and control signal are provided, 4-20mADC current signals corresponding with liquid level are sent out.
U-typed circulation pipe and outer tube are weldingly fixed on flange, and U-typed circulation pipe upper end is stretched out and passes through freon pipe
The circulation loop of freon refrigerant is connected and composed with cooling device, the circulation power of circulation fluid is provided by compressor, is considered
To energy consumption problem, gap cycle is could be provided as, to reduce energy consumption.Material position temperature detecting element is arranged in U-typed circulation pipe
On outer wall, meanwhile, outer tube is close on material position temperature detecting element outer wall, the outer wall of outer tube contacts the medium in container,
The effect of outer tube is to completely cut off in U-typed circulation pipe that liquid medium directly carries out heat exchange in circulation fluid and container.Outer tube
It is smooth, it is not easy to be stained with medium on outer tube, outer tube and temperature detecting element contact are good, ensure temperature detecting element and Jie
It conducts heat between matter good.
Medium temperature detecting element is provided with several, and the vertical height along the inner wall of outer tube is arranged in order, for surveying
The liquid and gas temperature of different height is measured, the signal wire of each material position temperature detecting element is individually drawn out to transmitter.Fig. 1
Shown in container have stirring, therefore in order to which liquid level gauge can be resistant to the rotary force that agitating paddle causes liquid, the present embodiment is followed in U-typed
Resistance to stirring support tube (not shown) is provided among endless tube.
Transmitter by analog signal switching input circuit, digital-to-analogue conversion, analog-to-digital conversion, analog output+hart, open
The processing of the compositions such as pass amount input, output switch parameter, microprocessor, display circuit, startup, stop button and input signal,
Program composition already belongs to the prior art, and this will not be detailed here.
When temperature detecting element in tank body in liquid phase when, freon to material position temperature detecting element heat quickly by tank
Internal liquid medium is absorbed or is taken away, and the temperature decline of material position temperature detecting element is less, and temperature change is also relatively slow；Work as material position
Temperature detecting element in tank body in gas phase when, freon is difficult to be absorbed by gas phase media to the heat of material position temperature detecting element
Or take away, therefore, temperature detecting element temperature is relatively low, and temperature change is very fast.According to the temperature of several material position temperature detecting elements
Degree and the change rate of temperature can determine that liquid and gas interface is sent out at which temperature detecting element, and by transmitter
Current signal corresponding with liquid level.Material position temperature detecting element 108 and material position temperature detecting element 110 are material position temperature detections
Element, wherein material position temperature detecting element 110 is arranged between two material position temperature detecting elements 108, medium temperature detection member
The quantity 111 of part is equal to the quantity of material position temperature detecting element 108.
It may determine that liquid level is located in that segment limit by the signal of the temperature detecting element of independent lead, the segment limit
There are two endpoint, lower extreme point is the medium temperature detecting element in liquid phase, and upper extreme point is the material position temperature in gas phase
Detecting element, if the temperature of medium temperature detecting element in the liquid phase is T1, the temperature of material position temperature detecting element in the gas phase
Be N in the temperature detecting element number of the total moisture content T of this section, this section for T2, then, and interface location M=(T-N*T1)/
(T2-T1)。
Embodiment 2
As shown in Fig. 2, fluid level measuring gauge includes U-typed circulation pipe, cooling device, insertion portion and pick-up in the present embodiment
206 part of device forms.Wherein, cooling device is by compressor 201, freon pipe 202, Freon 20 4, cryogenic temperature meter 205, pressure
Power transmitter 203 and thermal insulation material oblique line filling composition.Insertion portion is by flange 207, material position temperature detecting element 208, temperature
Heat-insulating material 209, material position temperature detecting element 210, medium temperature detecting element 211, outer tube 212 between sensor form.
Transmitter 206 receives all temperature sensor signals, pressure transmitter signal and externally fed power supply, and power supply is provided to compressor
With control signal, 4-20mADC current signals corresponding with liquid level are sent out.The signal wire of each material position temperature detecting element is single
Solely it is drawn out to transmitter.As different from Example 1, in the present embodiment, container is container without mixing, therefore in U-typed circulation pipe
Centre is not provided with the support tube of resistance to stirring.
Embodiment 3
As shown in figure 3, fluid level measuring gauge includes U-typed circulation pipe, cooling device, insertion portion and pick-up in the present embodiment
306 part of device forms.Wherein, cooling device by compressor 301, freon pipe 302, freon 304, freon thermometer 305,
Pressure transmitter 303 and thermal insulation material oblique line filling composition.Insertion portion is by flange 307, material position temperature detecting element 308, temperature
Spend heat-insulating material 309, material position temperature detecting element 310, medium temperature detecting element 311,312 groups of the outer tube between sensor
At because container has stirring, therefore further including having resistance to stirring support tube (not shown).Transmitter 306 receives all temperature sensing
Device signal, pressure transmitter signal and externally fed power supply provide power supply and control signal to compressor, send out corresponding with liquid level
4-20mADC current signals.Unlike, as shown in figure 9, in the present embodiment and medium temperature detecting element is the same as high material position
The signal wire of temperature detecting element is individually drawn out to transmitter, and the individually material position temperature between the material position temperature detecting element of lead
The lead of degree detecting element is connected one by one, and two temperature detecting element signal wires of head and the tail respectively draw one and arrive transmitter, above-mentioned to set
Set is to reduce lead.
Embodiment 4
As shown in figure 4, fluid level measuring gauge includes U-typed circulation pipe, cooling device, insertion portion and pick-up in the present embodiment
406 part of device forms.Wherein, cooling device by compressor 401, freon pipe 402, Freon 40 4, freon thermometer 405,
Pressure transmitter 403 and thermal insulation material oblique line filling composition.Insertion portion is by flange 407, material position temperature detecting element 408, temperature
Spend heat-insulating material 409, material position temperature detecting element 410, medium temperature detecting element 411,412 groups of the outer tube between sensor
At.Transmitter 406 receives all temperature detecting element signals, pressure transmitter signal and externally fed power supply, is carried to compressor
Power supply source and control signal, send out 4-20mADC current signals corresponding with liquid level.As shown in Figure 10 member is detected with medium temperature
Part is individually drawn out to transmitter with the signal wire of high material position temperature detecting element, and the individually material position temperature detecting element of lead
Between the lead of material position temperature detecting element connect one by one, two material position temperature detecting element signal wires of head and the tail respectively draw one
To transmitter, compared with Example 3, unlike, container is without mixing in the present embodiment, therefore is not provided with the support tube of resistance to stirring.
Embodiment 5
As shown in figure 5, fluid level measuring gauge includes U-typed circulation pipe, heating device, insertion portion and pick-up in the present embodiment
501 part of device forms.Wherein, heating device by 502 heat conduction fuel tank 503 of Heat-transfer Oil Pump, pressure transmitter 504, conduction oil 505,
Heat conduction fuel tank thermometer 506, heat transfer oil electric heating body 507, valve 508, connecting flange 509 and thermal insulation material composition；Insertion section
Divide by the heat-insulating material 512 between flange 510, material position temperature detecting element 511, temperature sensor, material position temperature detecting element
513, medium temperature detecting element 514, outer tube 515, resistance to stirring support tube composition.Transmitter 501 receives all temperature detections
Element signal, pressure transmitter signal and externally fed power supply provide power supply and control signal to Heat-transfer Oil Pump, send out and liquid level
Corresponding 4-20mADC current signals.The signal wire of each material position temperature detecting element is individually drawn out to transmitter, and container has
Stirring, therefore it is provided with the support tube of resistance to stirring.
When temperature detecting element in tank body in liquid phase when, conduction oil to temperature detecting element heat quickly by tank body
Liquid medium is absorbed or is taken away, and the temperature raising of temperature detecting element is less, and temperature change is also relatively slow；Work as temperature detecting element
When in tank body in gas phase, conduction oil is difficult to be absorbed or taken away by gas phase media to the heat of temperature detecting element, therefore, temperature
Degree detecting element temperature is higher, and temperature change is very fast.It can be with according to the change rate of the temperature of several temperature detecting elements and temperature
Liquid and gas interface is determined at which temperature detecting element, and electric current corresponding with liquid level is sent out by transmitter and is believed
Number.
Embodiment 6
As shown in fig. 6, fluid level measuring gauge includes U-typed circulation pipe, heating device, insertion portion and pick-up in the present embodiment
601 part of device forms.Wherein, heating device by 602 heat conduction fuel tank 603 of Heat-transfer Oil Pump, pressure transmitter 604, conduction oil 605,
606 heat transfer oil electric heating body 607 of heat conduction fuel tank thermometer, valve 608, connecting flange 609 and thermal insulation material composition；Insertion portion
By between flange 610, material position temperature detecting element 611, temperature sensor heat-insulating material 612, material position temperature detecting element 613,
Medium temperature detecting element 614, outer tube 615 form.Transmitter 601 receives all temperature detecting element signals, pressure inverting
Device signal and externally fed power supply provide power supply and control signal to Heat-transfer Oil Pump, send out 4-20mADC electricity corresponding with liquid level
Flow signal.The signal wire of each material position temperature detecting element is individually drawn out to transmitter.Compared with Example 5, the present embodiment
Middle container is without mixing, therefore stirring support is not arranged.
Embodiment 7
As shown in fig. 7, fluid level measuring gauge includes U-typed circulation pipe, heating device, insertion portion and pick-up in the present embodiment
701 part of device forms.Wherein, heating device by 702 heat conduction fuel tank 703 of Heat-transfer Oil Pump, pressure transmitter 704, conduction oil 705,
706 heat transfer oil electric heating body 707 of heat conduction fuel tank thermometer, valve 708, connecting flange 709 and thermal insulation material composition；Insertion portion
By between flange 710, material position temperature detecting element 711, temperature sensor heat-insulating material 712, material position temperature detecting element 713,
Medium temperature detecting element 714, outer tube 715, resistance to stirring support tube (not shown) composition.Transmitter 601 receives all
Temperature detecting element signal, pressure transmitter signal and externally fed power supply provide power supply and control signal, hair to Heat-transfer Oil Pump
Go out 4-20mADC current signals corresponding with liquid level.It is examined as shown in figure 11 with high material position temperature with medium temperature detecting element
The signal wire for surveying element is individually drawn out to transmitter, and the individually material position temperature detection between the material position temperature detecting element of lead
The lead of element is connected one by one, and two material position temperature detecting element signal wires of head and the tail respectively draw one and arrive transmitter.
Embodiment 8
As shown in figure 8, fluid level measuring gauge includes U-typed circulation pipe, heating device, insertion portion and pick-up in the present embodiment
801 part of device forms.Wherein, heating device by 802 heat conduction fuel tank 803 of Heat-transfer Oil Pump, pressure transmitter 804, conduction oil 805,
806 heat transfer oil electric heating body 807 of heat conduction fuel tank thermometer, valve 808, connecting flange 809 and thermal insulation material composition；Insertion portion
By between flange 810, material position temperature detecting element 811, temperature sensor heat-insulating material 812, material position temperature detecting element 813,
Medium temperature detecting element 814, outer tube 815 form.Transmitter 801 receives all temperature detecting element signals, pressure inverting
Device signal and externally fed power supply provide power supply and control signal to Heat-transfer Oil Pump, send out 4-20mADC electricity corresponding with liquid level
Flow signal.It is individually drawn out to the signal wire of high material position temperature detecting element with medium temperature detecting element as shown in figure 12
Transmitter, and individually the lead of the material position temperature detecting element between the material position temperature detecting element of lead is connected one by one, head and the tail
Two material position temperature detecting element signal wires respectively draw one and arrive transmitter, and container is without mixing.
According to above-described embodiment, the present invention can be realized well.It is worth noting that before based on above-mentioned design principle
It puts, to solve same technical problem, even if some made on architecture basics disclosed in this invention are without substantive
Change or polishing, the essence of used technical solution is still as the present invention, therefore it should also be as the protection model in the present invention
In enclosing.
Claims (14)
1. a kind of material level measuring method, which is characterized in that set in the non-medium to be determined above medium to be determined and its material position
Set through both circulatory mediator, the variation that temperature is detected by multiple temperature detecting elements determines medium to be determined and non-to be measured
The interface for determining medium thereby determines that the material position of medium to be determined；
Wherein, medium to be determined and non-medium to be determined and circulatory mediator are there are the temperature difference, and medium to be determined and non-Jie to be determined
Matter has different specific heat and heat transfer coefficient；
The temperature detecting element includes material position temperature detecting element and medium temperature detecting element, wherein material position temperature detection
Element receives the heat of circulatory mediator and container inner medium, for determining material position；Medium temperature detecting element only receives medium
Heat, the temperature for measuring medium；
If circulatory mediator is heat medium, when the specific heat of medium to be determined and heat transfer coefficient are more than non-medium to be determined, position
Material position temperature detecting element in medium to be determined, the temperature of detection are less than the material position temperature being located in non-medium to be determined
Detecting element；When the specific heat of medium to be determined and heat transfer coefficient are less than non-medium to be determined, the material in medium to be determined
Position temperature detecting element, the temperature of detection are higher than the material position temperature detecting element being located in non-medium to be determined；
If circulatory mediator is cooling medium, when the specific heat of medium to be determined and heat transfer coefficient are more than non-medium to be determined, position
Material position temperature detecting element in medium to be determined, the temperature of detection are higher than the material position temperature being located in non-medium to be determined
Detecting element；When the specific heat of medium to be determined and heat transfer coefficient are less than non-medium to be determined, the material in medium to be determined
Position temperature detecting element, the temperature of detection are less than the material position temperature detecting element being located in non-medium to be determined.
2. material level measuring method according to claim 1, which is characterized in that the temperature of the circulatory mediator and medium to be determined
Difference is realized by heating device or cooling device.
3. a kind of level measuring method, which is characterized in that application such as claim 1 to 2 any one of them material level measuring method
Measure the liquid level of liquid material.
4. a kind of solid material material level measuring method, which is characterized in that application such as claim 1 to 2 any one of them material position
Measurement method measures the material position of solid material.
5. realizing the device such as claim 1 to 2 any one of them material level measuring method, which is characterized in that waited for including being inserted into
The circulation pipe in medium is measured, and is infused in circulation pipe and has with medium to be determined the circulatory mediator of the temperature difference, it is described to follow
Expose from medium to be determined on endless tube top；
Be provided in the cycle pipe outer wall it is several be arranged above and below and mutual heat-insulated temperature detecting element, and the temperature is examined
There are one survey element is respectively provided at least in medium to be determined and in non-medium to be determined；
The temperature detecting element includes the material position temperature detecting element for receiving circulatory mediator and container inner medium heat, with
And only receive the medium temperature detecting element of container inner medium heat；
Outer tube is glued with outside the material position temperature detecting element, the outer wall of the outer tube contacts the medium to be determined；
Further include transmitter, the transmitter receives the detection signal of all temperature detecting elements and sends out electricity corresponding with material position
Flow signal.
6. device according to claim 5, which is characterized in that the circulation pipe is U-typed circulation pipe, and the U-typed is followed
Endless tube is connected with heating device or cooling device and is connected thereto the circulation loop for constituting circulatory mediator, the heating device or cold
But device is used to manufacture the temperature difference between circulatory mediator and medium to be determined.
7. device according to claim 6, which is characterized in that when the U-typed circulation pipe is connected with heating device, institute
It includes the heating liquid case for being stored with heating liquid to state heating device, is controlled by the transmitter and provides circulation power for heating liquid
Pump, the heating liquid heating device that heating liquid is heated；The pump inlet is connect by heating liquid pipe with the heating liquid case,
Pump discharge is connect by heating liquid pipe with the import of the U-typed circulation pipe, and the outlet of the U-typed circulation pipe is by heating liquid
Pipe is connect with the heating liquid case.
8. device according to claim 6, which is characterized in that when the U-typed circulation pipe is connected with cooling device, institute
It includes the refrigeration source device controlled by the transmitter to state cooling device, and the outlet of the refrigeration source device passes through refrigerator pipes and institute
State the import connection of U-typed circulation pipe, the outlet that the import for freezing source device passes through refrigerator pipes and the U-typed circulation pipe
Connection.
9. device according to claim 6, which is characterized in that the circulatory mediator in the circulation pipe is deposited with medium to be determined
In the temperature difference, and the non-medium to be determined above medium to be determined and its material position has different specific heat and heat transfer coefficient.
10. device according to claim 6, which is characterized in that be additionally provided with resistance to stirring among the U-typed circulation pipe
Support tube.
11. device according to claim 6, which is characterized in that further include for removing the housing pipe outer wall bridging
Material scraper.
12. device according to claim 6, which is characterized in that when the specific heat and heat transfer coefficient of medium to be determined are more than non-
When medium to be determined, the temperature of the material position temperature detecting element being located in medium to be determined, detection is less than positioned at non-to be determined
Material position temperature detecting element in medium；
When the specific heat of medium to be determined and heat transfer coefficient are less than non-medium to be determined, the material position temperature in medium to be determined
Detecting element, the temperature of detection are higher than the material position temperature detecting element being located in non-medium to be determined.
13. device according to claim 6, which is characterized in that the circulatory mediator gap of the U-typed circulation pipe recycles.
14. device according to claim 6, which is characterized in that be provided with temperature control system in the transmitter so that
Circulatory mediator temperature tracks medium temperature variation to be determined and changes, and ensures temperature difference between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510409160.6A CN105004399B (en) | 2015-04-20 | 2015-07-13 | Specific heat liquid level gauge |
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| CN2015101850915 | 2015-04-20 | ||
| CN201510185091 | 2015-04-20 | ||
| CN201510409160.6A CN105004399B (en) | 2015-04-20 | 2015-07-13 | Specific heat liquid level gauge |
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| CN105004399A CN105004399A (en) | 2015-10-28 |
| CN105004399B true CN105004399B (en) | 2018-10-16 |
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| CN201510409160.6A Active CN105004399B (en) | 2015-04-20 | 2015-07-13 | Specific heat liquid level gauge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105865574A (en) * | 2016-04-11 | 2016-08-17 | 北京吉泰凯士仪表科技有限公司 | Thermal type liquid level meter |
| CN107270995B (en) * | 2017-07-21 | 2019-12-10 | 中国核动力研究设计院 | High-temperature liquid metal multi-liquid-level measuring device and measuring method |
| CN109482120A (en) * | 2018-12-14 | 2019-03-19 | 南通三圣石墨设备科技股份有限公司 | Graphite heat exchanger and method built in a kind of novel reaction kettle |
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| CN202052555U (en) * | 2011-04-30 | 2011-11-30 | 广西师范大学 | Constant temperature bath device |
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