CN110361068A - A kind of material-level detecting device, system and method - Google Patents
A kind of material-level detecting device, system and method Download PDFInfo
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- CN110361068A CN110361068A CN201810321365.2A CN201810321365A CN110361068A CN 110361068 A CN110361068 A CN 110361068A CN 201810321365 A CN201810321365 A CN 201810321365A CN 110361068 A CN110361068 A CN 110361068A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
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Abstract
The present invention discloses a kind of material-level detecting device, system and method, is related to material-level measure technical field.For solving the problems, such as how to improve the detection accuracy of high temperature material position.Material-level detecting device of the invention includes support frame, the first gas-guide tube, multiple temperature detecting units, gas blower unit and control unit, first gas-guide tube is located at second side of support frame, and first gas-guide tube along perpendicular on support frame towards the surface of second side direction extend, first gas-guide tube is fixed on support frame close to one end of support frame, multiple gas vents are offered on the side wall of first gas-guide tube, multiple gas vents are successively spaced setting along the length direction of the first gas-guide tube；Multiple temperature detecting units are respectively arranged in multiple gas vents；Gas blower unit is for blowing gas into the first gas-guide tube；Control unit is electrically connected with multiple temperature detecting units.Material-level detecting device of the invention can detecte the high temperature material position in container.
Description
Technical field
The present invention relates to material-level measure technical field more particularly to a kind of material-level detecting devices, system and method.
Background technique
In the industries such as petrochemical industry, plastics, cement, medicine, feed, apparatus for measuring charge level is widely used in in closed container
Material position carries out bound alarm and control.
Exemplary, Fig. 1 is a kind of apparatus for measuring charge level for high-temperature material in the prior art, as shown in Figure 1, material position
Detection device includes support rod 01, connecting flange 02 and multiple temperature detecting units 03, and connecting flange 02 is set to support rod 01
One end, multiple temperature detecting units 03 are successively arranged at intervals on support rod 01 along the length direction of support rod 01.It is using
When this material-level detecting device detects high temperature material position, support rod 01 is inserted into closed container first, and passes through connecting flange 02
It is fixed on the outer wall of closed container, then by the temperature in multiple 03 detection containers of temperature detecting unit, due to container
The temperature of interior material is often higher than the air themperature above container contents, therefore two temperature detection lists that material position is neighbouring
It will appear jump between the measured value of member 03, examined as a result, according to the measured value of multiple temperature detecting units 03 and each temperature
Position of the unit 03 on support rod 01 is surveyed, the interval range of high temperature material position can be obtained.
But when the heat preservation of closed container is preferable, the temperature difference in container above and below material position is smaller, difficult at this time
To detect accurate high temperature material position by high temperature material-level detecting device shown in Fig. 1.
Summary of the invention
The present invention provides a kind of material-level detecting device, system and method, for solving how to improve the detection of high temperature material position
The problem of precision.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of material-level detecting device, including support frame, the first gas-guide tube, multiple temperature
Detection unit, gas blower unit and control unit, support frame as described above include the first side being oppositely arranged and second side；Described
One gas-guide tube is located at second side of support frame as described above, and first gas-guide tube along perpendicular on support frame as described above towards described the
The direction on the surface of two sides extends, and first gas-guide tube is fixed on support frame as described above close to one end of support frame as described above, institute
It states and offers multiple gas vents on the side wall of the first gas-guide tube, length direction of multiple gas vents along first gas-guide tube
Successively interval setting；Multiple temperature detecting units are respectively arranged in multiple gas vents；The gas blower unit
It is connected to first gas-guide tube close to one end of support frame as described above, the gas blower unit is used for first gas-guide tube
Gas is inside blowed, can be blown out into the gas in first gas-guide tube by multiple gas vents；Described control unit with
Multiple temperature detecting unit electrical connections, described control unit are used for the detected value according to multiple temperature detecting units,
Determine the material position value section of material.
Second aspect, the present invention provides a kind of material-level detection system, including container and material-level detecting device, the containers
Material is inside stored, detection mouth is offered on the roof of the container, the material-level detecting device is described in technical solution as above
Material-level detecting device, the first gas-guide tube of the material-level detecting device passes through the detection mouth and is inserted vertically into the container
In material, the support of the material-level detecting device is placed on the roof of the container.
The third aspect, the present invention provides a kind of material level detection methods, are used for material-level detecting device, the material-level measure dress
It sets including support frame and the first gas-guide tube, support frame as described above includes the first side being oppositely arranged and second side, first air guide
Pipe be located at support frame as described above second side, and first gas-guide tube along perpendicular on support frame as described above towards described second side
The direction on surface extends, and first gas-guide tube is fixed on support frame as described above close to one end of support frame as described above, and described first
Offer multiple gas vents on the side wall of gas-guide tube, multiple gas vents along first gas-guide tube length direction successively between
Every setting, which comprises
First gas-guide tube is inserted vertically into the container equipped with material, and support frame as described above is made to be placed in the container
Roof on；
Gas is blowed into one end of the close support frame as described above of the first gas-guide tube, and is detected in multiple gas vents
Temperature value；
According to multiple temperature values, the material position value section of the material is determined.
A kind of material-level detecting device provided by the invention, system and method, using in material-level detecting device detection container
High temperature material position when, the first gas-guide tube is passed through into the detection mouth in vessel top wall first and is inserted vertically into high-temperature material, and is made
Support is placed on the roof of container, then, is blown by gas blower unit into one end of the close support frame of the first gas-guide tube
It supplies gas body, while detecting the temperature in multiple gas vents by multiple temperature detecting units, it can be by into the gas in gas-guide tube
Multiple gas vent blowouts, thus air near cooling temperature detection unit, and at the gas vent buried by high-temperature material, due to
It is hindered by material, the flow of gas blowout is small, therefore temperature measured by temperature detecting unit is high, not by high temperature above material position
At the gas vent that material buries, the flow of gas blowout is big, therefore temperature measured by temperature detecting unit is very low, therefore material position
Difference between the measured value of two neighbouring temperature detecting units is greater than any other two adjacent temperature detection lists
Difference between the measured value of member, the measured value by observing multiple temperature detecting units can be obtained the accurate area of high-temperature material
Between, which thereby enhance the detection accuracy of high temperature material position.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of prior art material-level detecting device；
Fig. 2 is the first structural schematic diagram of material-level detecting device of the embodiment of the present invention；
Fig. 3 is the cross section structure schematic diagram of the first gas-guide tube in material-level detecting device of the embodiment of the present invention；
Fig. 4 is second of structural schematic diagram of material-level detecting device of the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of material-level detection system of the embodiment of the present invention；
Fig. 6 is the first flow chart of material level detection method of the embodiment of the present invention；
Fig. 7 is second of flow chart of material level detection method of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.?
In description of the invention, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection；It can be directly connected, the company inside two elements can also be can be indirectly connected through an intermediary
It is logical.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Referring to fig. 2, Fig. 2 is a kind of embodiment of material-level detecting device of the embodiment of the present invention, the material-level measure of the present embodiment
Device include support frame 1, the first gas-guide tube 2, multiple temperature detecting units 3, gas blower unit 4 and control unit (in figure not
Show), support frame 1 includes the first side being oppositely arranged and second side；First gas-guide tube 2 is located at second side of the support frame 1, and
First gas-guide tube 2 extends on perpendicular to the support frame 1 towards the direction on the surface of second side, and the first gas-guide tube 2 is close to support
One end of frame 1 is fixed on support frame 1, multiple gas vents 5 is offered on the side wall of the first gas-guide tube 2, multiple gas vents 5 are along
The length direction of one gas-guide tube 2 is successively spaced setting；Multiple temperature detecting units 3 are respectively arranged in multiple gas vents 5；Gas
Blower unit 4 is connected to the first gas-guide tube 2 close to one end of support frame 1, and gas blower unit 4 is used for into the first gas-guide tube 2
Gas is blowed, can be blown out into the gas in the first gas-guide tube 2 by multiple gas vents 5；Control unit and multiple temperature detections
Unit 3 is electrically connected, control unit be used to be determined according to the detected values of multiple temperature detecting units 3 material material position value section [a,
b]。
A kind of material-level detecting device provided by the invention, use in material-level detecting device detection container temperature for 500 DEG C
When the material position of~1200 DEG C of high-temperature material, the first gas-guide tube 2 is passed through into the detection mouth in vessel top wall first and is inserted vertically into height
In warm material, and support frame 1 is placed on the roof of container, then, is leaned on by gas blower unit 4 to the first gas-guide tube 2
Gas is blowed in one end of nearly support frame 1, while detecting the temperature in multiple gas vents 5 by multiple temperature detecting units 3, into
Entering the gas in gas-guide tube can be blown out by multiple gas vents 5, thus air near cooling temperature detection unit 3, and by high temperature
At the gas vent 5 that material buries, due to being hindered by material, the flow of gas blowout is small, therefore measured by temperature detecting unit 3
Temperature is high, and at the gas vent 5 not buried by high-temperature material above material position, the flow of gas blowout is big, therefore temperature detection list
Temperature measured by member 3 is low, therefore the difference between the measured value of neighbouring two temperature detecting units 3 of material position is greater than it
Difference between the measured value of two temperature detecting units 3 of his arbitrary neighborhood, by the survey for observing multiple temperature detecting units 3
Magnitude can be obtained the accurate section of high-temperature material material position, which thereby enhance the detection essence of high-temperature material material position in confined space
Degree.
In the above-described embodiments, it should be noted that for the survey for two temperature detecting units 3 for keeping material position neighbouring
Occurs obvious jump between magnitude, the temperature and object of the gas blowed from gas blower unit 4 into the first gas-guide tube 2
Difference between the temperature of material need to be greater than or equal to 50 DEG C, and according to this difference, apparatus for measuring charge level of the embodiment of the present invention not only may be used
For measuring high temperature material position, can be used for measurement room temperature material position or low temperature material position, it need to only make gas blower unit 4 to the
Difference between the temperature of the gas temperature and material to be detected that blow in one gas-guide tube 2 is greater than or equal to 50 DEG C, and
The difference is bigger during actual measurement, and the accuracy of detection is higher, therefore in embodiments of the present invention, in order to improve high temperature material
The detection accuracy of position, then the gas that gas blower unit 4 is blowed into the first gas-guide tube 2 can be gas at normal temperature or temperature
The cold air of cold air less than 10 DEG C, preferably temperature less than 10 DEG C.
In addition, it is necessary to explanation, the first gas-guide tube 2 is deformed or damages under the action of high-temperature material in order to prevent
It is bad, it is preferred that the first gas-guide tube 2 is made by heat-resisting material, can prevent the first gas-guide tube 2 under the action of high-temperature material in this way
It is deformed or damages.
It in the embodiment shown in Figure 2, can be oxygen from the gas that gas blower unit 4 is blowed into the first gas-guide tube 2
Inertia exhaust gas in gas, nitrogen, air or industry etc., is not specifically limited herein, still, in order to avoid being blowed by gas
Chemical reaction is generated between the gas and material to be detected that unit 4 is blowed into the first gas-guide tube 2, it is preferred that blowed by gas
The gas that unit 4 is blowed into the first gas-guide tube 2 is nitrogen, and the chemical stability of nitrogen is higher, it is difficult to material to be detected it
Between generate chemical reaction, meanwhile, nitrogen storage in atmosphere is for larger therefore easy to accomplish, and cost is relatively low.
In the embodiment shown in Figure 2, without limitation to the specific structure of gas blower unit 4, exemplary, such as Fig. 2 institute
Show, gas blower unit 4 is including constant current gas source 42, pressure maintaining valve 41 and blows feed channel 43.
In the embodiment shown in Figure 2, support frame 1 can be block structure, or plate structure does not do have herein
Body limits.Preferably, support frame 1 is blind flange shown in Fig. 2, the central axes extending direction of the blind flange and the first gas-guide tube 2
Length extending direction it is identical, in this way, by the first gas-guide tube 2 pass through container on detection mouth be inserted vertically into high temperature material position
When, the detection mouth can be blocked by blind flange, it is right in external environment to prevent the heat in container from being leaked to by the detection mouth
Operator damages, while blind flange can be connect by flange hole thereon with container, in order to fixed material-level measure dress
The relative position between container is set, prevents material-level detecting device from generating play relative to container.
In the embodiment shown in Figure 2, the cross sectional shape of the first gas-guide tube 2 can be round, rectangular, triangle etc.,
It is not specifically limited herein.
In the embodiment shown in Figure 2, the sectional dimension of the first gas-guide tube 2 is not specifically limited.Optionally, when first
When the cross sectional shape of gas-guide tube 2 is round, the diameter of the first gas-guide tube 2 can arbitrary value between 25mm~200mm, when the
When the cross sectional shape of one gas-guide tube 2 is rectangular, then the section side length of the first gas-guide tube can be any between 20mm~200mm
Value.
In the embodiment shown in Figure 2, multiple gas vents 5 can be uniformly arranged along the first gas-guide tube 2, can also be along first
The non-homogeneous setting of gas-guide tube 2, is not specifically limited herein.
In the embodiment shown in Figure 2, density of setting of the gas vent 5 on the first gas-guide tube 2 is not specifically limited.
In the embodiment shown in Figure 2, the diameter of gas vent 5 can be 2mm, 3mm or 4mm etc., do not do have herein
Body limits.Optionally, the diameter of gas vent 5 is 1mm~20mm.
In order to protect the electric connection line between multiple temperature detecting units 3 and control unit, it is preferred that as shown in figure 3, the
One gas-guide tube 2 is heat insulation type gas-guide tube, and the electric connection line 31 between multiple temperature detecting units 3 and control unit is arranged in first
In gas-guide tube 2.In this way, being electrically connected between multiple temperature detecting units 3 and control unit can be protected by the first gas-guide tube 2
Line 31, so that the electric connection line 31 between multiple temperature detecting units 3 and control unit be avoided to be influenced by the high temperature of material.
In the above-described embodiments, the side wall of the first gas-guide tube 2 can be made by layer of material, can also be by multilayer material system
Make, is not specifically limited herein.Exemplary, the side wall of the first gas-guide tube 2 is made by inside and outside materials at two layers, and cladding material is resistance to height
Warm stainless steel 310S, inner layer material are heat-barrier material.
Further, in order to avoid the electric connection line 31 between multiple temperature detecting units 3 and control unit blocks exhaust
Hole 5, as shown in figure 3, the electric connection line 31 between multiple temperature detecting units 3 and control unit can be along the first gas-guide tube 2
Central axes arrangement, and there is annular gap between 2 inner wall of the electric connection line 31 and the first gas-guide tube, in this way, can avoid multiple temperature
The electric connection line 31 spent between detection unit 3 and control unit blocks gas vent 5, to ensure that the detection of material-level detecting device
Precision.
In the embodiment shown in Figure 2, first one end of gas-guide tube 2 far from support frame 1 can be opened wide, and can also close,
It is not specifically limited herein.But the shadow in order to avoid the electric connection line 31 that is arranged in the first gas-guide tube 2 by high-temperature material
It rings, it is preferred that the first gas-guide tube 2 is far from the closed at one end of support frame 1, in this way, being inserted into high-temperature material by the first gas-guide tube 2
During, high-temperature material will not be poured in the first gas-guide tube 2 by the first gas-guide tube 2 far from one end of support frame 1, thus not
The electric connection line 31 being arranged in the first gas-guide tube 2 can be had an impact.
Further, excellent in order to which the material position value section detected to material-level detecting device shown in Fig. 2 is modified supplement
Choosing, as shown in figure 4, material-level detecting device further includes the second gas-guide tube 6, pressure differential detection unit 7, the first pressure guiding pipe 8 and second
Pressure guiding pipe 9, wherein the first end of the second gas-guide tube 6 is located at the first side of support frame 1, and the second end of the second gas-guide tube 6 passes through branch
Support 1 extends to the position concordant with first one end of gas-guide tube 2 far from support frame 1, and gas blower unit 4 is also used to second
Gas is blowed in the first end of gas-guide tube 6, it can be by the second gas-guide tube 6 into the gas in the first end of the second gas-guide tube 6
Second end blowout；Pressure differential detection unit 7 includes first pressure interface and second pressure interface, and the pressure differential detection unit 7 is for examining
Survey the pressure difference in first pressure interface in gas and second pressure interface between gas；The first end and gas of first pressure guiding pipe 8
Body blower unit 4 connects, and gas blower unit 4 is while blowing gas into the second gas-guide tube 6, also to the first pressure guiding pipe 8
Gas is inside blowed, and makes the gas pressure blowed in first pressure connector and blows to the gas pressure in the second gas-guide tube 6
Power is equal, and the second end of the first pressure guiding pipe 8 is connect with first pressure interface；The first end of second pressure guiding pipe 9 is located at support frame 1
Second side, the second end of the second pressure guiding pipe 9 pass through support frame 1 and connect with second pressure interface；Pressure differential detection unit 7 and control are single
Member electrical connection, control unit are used for the pressure differential Δ p detected according to pressure differential detection unit 7, calculate the material position value h of material, and
According to material position value h and material position value section [a, b], material position is determined.In this way, the first gas-guide tube 2 to be passed through to the inspection in vessel top wall
While surveying mouth to be inserted vertically into high-temperature material, and support frame 1 is placed on the roof of container, the second pressure guiding pipe 9 may make
First end be connected to the upper space of container contents, in this way, by gas blower unit 4 to the second gas-guide tube 6 the
When one end blows gas, the gas in the second gas-guide tube 6 can be blown into the high temperature substrate in container by the second end of the second gas-guide tube 6
It in material, and passes through material gap and enters in the upper space of container contents, pass through pressure differential detection unit 7,8 and of the first pressure guiding pipe
The detection of second pressure guiding pipe 9 is blowed by gas blower unit 4 to the gas and container contents upper space in the second gas-guide tube 6
Gas between pressure differential Δ p the height l of the first gas-guide tube 2 embedment material can be calculated according to this difference force Δ p, into
And the material position value h of material is calculated, it can be to the material position value area that material-level detecting device shown in Fig. 2 detects by this material position value h
Between [a, b] be modified supplement.
Wherein, the pressure differential Δ p detected according to pressure differential detection unit 7, it is used when calculating the material position value h of material
Calculation formula can be with are as follows:
Material position value h=H-L+l, wherein H indicates the height of container, and L indicates that the total length of the first gas-guide tube 2, l indicate first
Gas-guide tube 2 is embedded to the length of the part in material, and l can be calculated according to the following deformation formula of Europe root equation, it may be assumed that
Wherein, d indicates the equivalent diameter of material particles, unit m；G indicates gravity constant, unit N/Kg；δ expression thing
The severe of material, unit N/m3, u is indicated to be blowed by gas blower unit 4 to the flowing velocity of the gas in the second gas-guide tube 6, single
Position m/s, f indicate Mack road Nader's friction factor,
Wherein, e indicates bed of material voidage, heap density/material apparent density of e=1- material；Re indicates Reynolds number,
Wherein, D indicates the internal diameter of the second gas-guide tube 6, and ρ expression is blowed by gas blower unit 4 to the second gas-guide tube 6
The density of gas, ν expression are blowed by gas blower unit 4 to the viscosity coefficient of the gas in the second gas-guide tube 6.
The pressure differential Δ p detected according to pressure differential detection unit 7, when calculating the material position value h of material, used calculating is public
Formula may be:
Material position value h=H-L+l, wherein H indicates the height of container, and L indicates that the total length of the first gas-guide tube 2, l indicate first
Gas-guide tube 2 is embedded to the length of the part in material,
Wherein, g indicates gravity constant, and n is correction factor, and occurrence is obtained according to calibration mode, ρbFor material accumulation
Density, unit Kg/m3。
Certainly, the pressure differential Δ p detected according to pressure differential detection unit 7, it is used when calculating the material position value h of material
Calculation formula can also be other formula, be not specifically limited herein.
In addition, control unit according to material position value h and material position value section [a, b], determines that the detailed process of material position can be with are as follows: control
Whether unit judges processed material position value h is located in the material position value section [a, b]；When material position value h be located at the material position value section [a,
B] it is interior when, control unit then determine material position be equal to material position value h；When material position value h be located at the material position value section [a, b] it is outer when,
Control unit then determines the arbitrary value that material position is equal in the material position value section [a, b].
Control unit determines that the detailed process of material position may be according to material position value h and material position value section [a, b]: control
Whether unit judges material position value h is located in the material position value section [a, b]；When material position value h is located at the material position value section [a, b]
When interior, control unit then determines that material position is equal to material position value h；When material position value h be located at the material position value section [a, b] it is outer when, control
Unit processed then determines that material position is equal to the average value of the two-end-point in the material position value section [a, b].Certainly, control unit is according to material position value
H and material position value section [a, b] determine that the detailed process of material position can also be other processes, are not specifically limited herein.
In the embodiment shown in fig. 4, gas blower unit 4 can be two gas blowing structures independent of each other, two
A gas blowing structure is respectively used to blow gas into the first gas-guide tube 2 and the second gas-guide tube 6；Gas blower unit 4 can also
Think a gas blowing structure, which includes that master blows tracheae and is connected to main two branch blowed on tracheae
Pipe, two branch pipes are connect with the first gas-guide tube 2 and the second gas-guide tube 6 respectively.
In the embodiment shown in fig. 4, the structure of pressure differential detection unit 7 can there are many, be not specifically limited herein, it is excellent
Choosing, pressure differential detection unit 7 is differential pressure transmitter, and differential pressure transmitter is the structure of common detection gas pressure difference, structure letter
It is single, it is easy to accomplish.
In the embodiment shown in fig. 4, on the second gas-guide tube 6 positioned at support frame 1 second side part can be set in
It in first gas-guide tube 2, also can be set in outside the first gas-guide tube 2, and be arranged side by side with the first gas-guide tube 2, do not do herein specific
It limits.
In order to protect the second gas-guide tube 6, it is preferred that as shown in figure 4, being located at second side of support frame 1 on the second gas-guide tube 6
Part be set in the first gas-guide tube 2.In this way, second gas-guide tube 6 can be protected by the first gas-guide tube 2, the second air guide is avoided
Pipe 6 is deformed or damages under the action of high-temperature material.
As shown in figure 5, the embodiment of the invention also provides a kind of material-level detection system, including container 100 and material-level measure
Device stores material 200 in the container 100, offers detection mouth on the roof of container 100, which is such as
Material-level detecting device described in upper any technical solution, the first gas-guide tube 2 of the material-level detecting device pass through detection mouth and insert vertically
Enter in the material 200 in container 100, the support frame 1 of material-level detecting device is placed on the roof of container 100.
A kind of material-level detection system provided by the invention is led by the gas blower unit 4 of material-level detecting device to first
Tracheae 2 blows gas in one end of support frame 1, while being detected in multiple gas vents 5 by multiple temperature detecting units 3
Temperature can be blown out into the gas in gas-guide tube by multiple gas vents 5, thus air near cooling temperature detection unit 3, and
At the gas vent 5 buried by high-temperature material, due to being hindered by material, the flow of gas blowout is small, therefore 3 institute of temperature detecting unit
The temperature measured is high, and at the gas vent 5 not buried by high-temperature material above material position, the flow of gas blowout is big, therefore temperature
Temperature measured by detection unit 3 is very low, therefore, between the measured value of two neighbouring temperature detecting units 3 of material position
Difference is greater than the difference between the measured value of any other two adjacent temperature detecting units 3, is examined by observing multiple temperature
The measured value for surveying unit 3 can be obtained the accurate section [a, b] of high-temperature material, which thereby enhance the detection accuracy of high temperature material position.
In the above-described embodiments, container 100 can be cylindric, or flat column can also be other shapes,
This is not specifically limited.
Further, in order to be modified supplement to the above-mentioned material position value section [a, b] measured, it is preferred that such as Fig. 5 institute
Show, the first end of the second pressure guiding pipe 9 of material-level detecting device is connected to the upper space of material 200 in container 100.In this way,
When blowing gas to the first end of the second gas-guide tube 6 by gas blower unit 4, the gas in the second gas-guide tube 6 can be by
The second end of two gas-guide tubes 6 is blown into the high-temperature material 200 in container 100, and is passed through material gap and entered container contents 200
Upper space in, by the pressure differential detection unit 7 of material-level detecting device, the first pressure guiding pipe 8 and the second pressure guiding pipe 9 detect by gas
Body blower unit 4 is blowed between the gas in 200 upper space of material in the gas and container 100 in the second gas-guide tube 6
Pressure differential Δ p can calculate the height l of the first gas-guide tube 2 embedment material according to this difference force Δ p, and then calculate material
Material position value h, therefore supplement can be modified to the above-mentioned material position value section [a, b] measured by this material position value h.
As shown in fig. 6, being used for material-level detecting device, the material the embodiment of the invention also provides a kind of material level detection method
Level detecting apparatus includes support frame and the first gas-guide tube, wherein and support frame includes the first side being oppositely arranged and second side, and first
Gas-guide tube is located at second side of the support frame, and the first gas-guide tube along perpendicular on support frame towards the direction on the surface of second side
Extend, the first gas-guide tube is fixed on support frame close to one end of support frame, and multiple rows are offered on the side wall of the first gas-guide tube
Stomata, multiple gas vents are successively spaced setting along the length direction of the first gas-guide tube, this method comprises:
S1, the first gas-guide tube is inserted vertically into the container equipped with material, and support is placed on the roof of container；
S2, gas is blowed into one end of the close support frame of the first gas-guide tube, and detect the temperature value in multiple gas vents；
S3, according to multiple temperature values, determine the material position value section [a, b] of material.
First gas-guide tube is inserted vertically into the container equipped with material by a kind of material level detection method provided by the invention, and
So that after support is placed on the roof of container gas can be blowed into one end of the close support frame of the first gas-guide tube, and examine
The temperature value in multiple gas vents is surveyed, due to being hindered by material at the gas vent buried by high-temperature material, the stream of gas blowout
Measure small, therefore the temperature that measures at the gas vent is high, at the gas vent not buried by high-temperature material above material position, gas blowout
Flow it is big, therefore the temperature measured at the gas vent is very low, therefore the temperature measured at neighbouring two gas vents of material position
Angle value will appear obvious jump, can be obtained the standard of high-temperature material by observing the temperature value measured at multiple gas vents
True section which thereby enhances the detection accuracy of high temperature material position.
In the above-described embodiments, in order to be modified supplement to the above-mentioned material position value section measured, it is preferred that material-level measure
Device further includes the second gas-guide tube, and the first end of the second gas-guide tube is located at the first side of support frame, the second end of the second gas-guide tube
The concordant position in one end with the first gas-guide tube far from support frame is extended to across support frame, as shown in fig. 7, after step S3,
Further include: gas S4, is blowed into the first end of the second gas-guide tube, and is detected and blowed into gas in the second gas-guide tube and container
Pressure differential Δ p between gas in material upper space；S5, according to pressure differential Δ p, calculate the material position value h of material；S6, root
According to material position value h and material position value section [a, b], the material position of material is determined.In this way, can be to the above-mentioned material measured by this material position value h
[a, b] is modified supplement in place value section.
Wherein, according to pressure differential Δ p, when calculating the material position value h of material, used calculation formula can be with are as follows:
Material position value h=H-L+l, wherein H indicates the height of container, and L indicates that the total length of the first gas-guide tube, l indicate first
Gas-guide tube is embedded to the length of the part in material, and l can be calculated according to the following deformation formula of Europe root equation, it may be assumed that
Wherein, d indicates the equivalent diameter of material particles, unit m；G indicates gravity constant, unit N/Kg；δ expression thing
The severe of material, unit N/m3, u expression blowed by gas blower unit 4 to the speed of the gas in the second gas-guide tube 6, unit m/
S, f indicate Mack road Nader's friction factor,
Wherein, e indicates bed of material voidage, heap density/material apparent density of e=1- material；Re indicates Reynolds number,
Wherein, D indicates the internal diameter of the second gas-guide tube 6, and ρ expression is blowed by gas blower unit 4 to the second gas-guide tube 6
The density of gas, ν expression are blowed by gas blower unit 4 to the viscosity coefficient of the gas in the second gas-guide tube 6.
According to pressure differential Δ p, when calculating the material position value h of material, used calculation formula may be:
Material position value h=H-L+l, wherein H indicates the height of container, and L indicates that the total length of the first gas-guide tube, l indicate first
Gas-guide tube is embedded to the length of the part in material,
Wherein, g indicates gravity constant, and n is correction factor, and occurrence is obtained according to calibration mode, ρbFor material accumulation
Density, unit Kg/m3。
Certainly, according to pressure differential Δ p, when calculating the material position value h of material, used calculation formula can also be public for other
Formula is not specifically limited herein.
In addition, in order to avoid the gas in the first gas-guide tube has an impact the calculating of material position value, it is preferred that in step S3
Later, before step S4, further includes: stop blowing gas into one end of the close support frame of the first gas-guide tube.Thus avoid into
The gas entered in the first gas-guide tube has an impact the measurement of pressure differential Δ p, and then the calculating to material position value h is avoided to generate shadow
It rings.
Furthermore step S6 may include:
S61, judge whether material position value h is located in material position value section [a, b]；
S62, when material position value h be located at material position value section [a, b] it is interior when, determine material position be equal to material position value h；
S63, when material position value h be located at material position value section [a, b] it is outer when, determine material position be equal to material position value section [a, b] in
Arbitrary value.
Step S6 can also include:
S61, judge whether material position value h is located in material position value section [a, b]；
S62, when material position value h be located at material position value section [a, b] it is interior when, determine material position be equal to material position value h；
S63, when material position value h be located at material position value section [a, b] it is outer when, determine material position be equal to material position value section [a, b] in two
The average value of endpoint.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of protection of the claims
It is quasi-.
Claims (13)
1. a kind of material-level detecting device, which is characterized in that including support frame, the first gas-guide tube, multiple temperature detecting units, gas
Blower unit and control unit,
Support frame as described above includes the first side being oppositely arranged and second side；
First gas-guide tube is located at second side of support frame as described above, and first gas-guide tube is along perpendicular on support frame as described above
Extend towards the direction on the surface of described second side, first gas-guide tube is fixed on the branch close to one end of support frame as described above
On support, multiple gas vents are offered on the side wall of first gas-guide tube, multiple gas vents are along first gas-guide tube
Length direction be successively spaced setting；
Multiple temperature detecting units are respectively arranged in multiple gas vents；
The gas blower unit is connected to first gas-guide tube close to one end of support frame as described above, the gas blower unit
It, can be by multiple gas vents into the gas in first gas-guide tube for blowing gas into first gas-guide tube
Blowout；
Described control unit is electrically connected with multiple temperature detecting units, and described control unit is used for according to multiple temperature
The detected value of detection unit determines the material position value section of material.
2. material-level detecting device according to claim 1, which is characterized in that first gas-guide tube is heat insulation type air guide
Pipe, the electric connection line between multiple temperature detecting units and described control unit are arranged in first gas-guide tube.
3. material-level detecting device according to claim 2, which is characterized in that multiple temperature detecting units and the control
Electric connection line between unit processed is arranged along the central axes of first gas-guide tube, and the electric connection line and first air guide
There is annular gap between the inner wall of pipe.
4. material-level detecting device according to claim 2, which is characterized in that first gas-guide tube is far from support frame as described above
It is closed at one end.
5. material-level detecting device according to claim 1, which is characterized in that support frame as described above is blind flange, the flange
The central axes extending direction of lid is identical as the length extending direction of first gas-guide tube.
6. material-level detecting device according to any one of claims 1 to 5, which is characterized in that further include the second gas-guide tube,
Pressure differential detection unit, the first pressure guiding pipe and the second pressure guiding pipe,
The first end of second gas-guide tube is located at the first side of support frame as described above, and the second end of second gas-guide tube passes through institute
It states support frame and extends to the position concordant with the described one end of first gas-guide tube far from support frame as described above, the gas blower unit
It is also used to blow gas into the first end of second gas-guide tube, the gas energy into the first end of second gas-guide tube
Enough second ends by second gas-guide tube are blown out；
The pressure differential detection unit includes first pressure interface and second pressure interface, and the pressure differential detection unit is for detecting institute
State the pressure difference in first pressure interface in gas and the second pressure interface between gas；
The first end of first pressure guiding pipe is connect with the gas blower unit, and the gas blower unit is to described second
While blowing gas in gas-guide tube, gas also is blowed into first pressure guiding pipe, and to blow to the first pressure
Gas pressure in connector with blow, the second end of first pressure guiding pipe equal to the gas pressure in second gas-guide tube
It is connect with the first pressure interface；
The first end of second pressure guiding pipe is located at second side of support frame as described above, and the second end of second pressure guiding pipe passes through institute
Support frame is stated to connect with the second pressure interface；
The pressure differential detection unit is electrically connected with the control unit, and described control unit is used for according to the pressure differential detection unit
The pressure difference detected calculates the material position value of material, and according to the material position value and material position value section, determines material position.
7. material-level detecting device according to claim 6, which is characterized in that the pressure differential detection unit is differential pressure transporting
Device.
8. material-level detecting device according to claim 6, which is characterized in that be located at the support on second gas-guide tube
The part of second side of frame is set in first gas-guide tube.
9. a kind of material-level detection system, which is characterized in that including container and material-level detecting device, the stored in containers has object
Expect, detection mouth is offered on the roof of the container, and the material-level detecting device is according to any one of claims 1 to 8
Material-level detecting device, the first gas-guide tube of the material-level detecting device pass through the detection mouth and are inserted vertically into the object in the container
In material, the support of the material-level detecting device is placed on the roof of the container.
10. system according to claim 9, which is characterized in that the first of the second pressure guiding pipe of the material-level detecting device
End is connected to the upper space of the container contents.
11. a kind of material level detection method, which is characterized in that be used for material-level detecting device, the material-level detecting device includes support
Frame and the first gas-guide tube, support frame as described above include the first side being oppositely arranged and second side, and first gas-guide tube is located at described
Second side of support frame, and first gas-guide tube along perpendicular on support frame as described above towards the direction on the surface of described second side
Extend, first gas-guide tube is fixed on support frame as described above close to one end of support frame as described above, the side of first gas-guide tube
Multiple gas vents are offered on wall, multiple gas vents are successively spaced setting, institute along the length direction of first gas-guide tube
The method of stating includes:
First gas-guide tube is inserted vertically into the container equipped with material, and support frame as described above is made to be placed in the top of the container
On wall；
Gas is blowed to one end of the close support frame as described above of the first gas-guide tube, and detects the temperature in multiple gas vents
Value；
According to multiple temperature values, the material position value section of the material is determined.
12. according to the method for claim 11, which is characterized in that the material-level detecting device further includes the second gas-guide tube,
The first end of second gas-guide tube is located at the first side of support frame as described above, and the second end of second gas-guide tube passes through the branch
Support extends to the position concordant with the described one end of first gas-guide tube far from support frame as described above, described according to multiple temperature
Angle value, after the material position value section for determining the material, further includes:
Blow gas into the first end of second gas-guide tube, and detect blow to gas in second gas-guide tube with it is described
The pressure difference between gas in material in container upper space；
According to the pressure difference, the material position value of the material is calculated；
According to the material position value and material position value section, the material position of the material is determined.
13. according to the method for claim 12, which is characterized in that described according to the material position value and material position value area
Between, determine the material position of the material, comprising:
Judge whether the material position value is located in material position value section；
When the material position value is located in material position value section, determine that the material position is equal to the material position value；When the material position
When value is located at outside material position value section, the arbitrary value that the material position is equal in material position value section is determined.
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