CN115420351A - Liquid level floater anti-clamping stagnation method and device and urea box - Google Patents
Liquid level floater anti-clamping stagnation method and device and urea box Download PDFInfo
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- CN115420351A CN115420351A CN202211107853.6A CN202211107853A CN115420351A CN 115420351 A CN115420351 A CN 115420351A CN 202211107853 A CN202211107853 A CN 202211107853A CN 115420351 A CN115420351 A CN 115420351A
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- 239000004202 carbamide Substances 0.000 title claims abstract description 43
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000007788 liquid Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 120
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 53
- 238000001514 detection method Methods 0.000 claims description 16
- 230000000712 assembly Effects 0.000 claims description 14
- 238000000429 assembly Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Classifications
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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
- G01F23/30—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 floats
- G01F23/76—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 floats characterised by the construction of the float
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/12—Other sensor principles, e.g. using electro conductivity of substrate or radio frequency
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
- F01N2610/107—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance using glow plug heating elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1486—Means to prevent the substance from freezing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to the technical field of engines, in particular to a method and a device for preventing a liquid level floater from being blocked and a urea box, wherein the method comprises the following steps: the method comprises the steps of obtaining first position information of a floater relative to a reed pipe body, obtaining second position information of the floater relative to the reed pipe body after a preset period, obtaining position variation of the floater according to the first position information and the second position information, judging that the floater is in a clamping stagnation state at a second position relative to the reed pipe body when the position variation meets a first threshold value, and heating the floater at the second position. According to the invention, the float and the reed switch body do not need to be disassembled, the clamping stagnation can be avoided only by heating the clamping stagnation position of the float, the clamping stagnation solving mode is simple and effective, the process of solving the clamping stagnation of the float is effectively simplified, and the time and the labor are saved.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a method and a device for preventing a liquid level floater from being blocked and a urea box.
Background
The urea tank sensor can be used for detecting the temperature, concentration and liquid level of urea in the urea tank, and the urea liquid level detection is implemented by using a floater with a magnet inside to be matched with a reed switch for measurement, and under the normal condition, the floater floats on the urea liquid level, and at the moment, the measured value of the urea liquid level is accurate.
However, when the existing floater is used, the urea solution has certain viscosity, so that the floater can be adhered to the reed pipe after being used for a long period, the liquid level measurement is abnormal due to the fact that the floater is not changed along with the urea liquid level, and the existing solution is time-consuming and labor-consuming because the urea tank sensor is detached for cleaning.
Disclosure of Invention
The invention discloses a method and a device for preventing liquid level floats from being blocked and a urea box, which are used for simplifying the cleaning process of the floats and avoiding the phenomenon of blocking of the floats.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the invention provides a method for preventing liquid level floater from being blocked, comprising the following steps:
acquiring first position information of a floater relative to a reed switch body;
after a preset period, acquiring second position information of the floater relative to the reed pipe body;
obtaining the position variation of the floater according to the first position information and the second position information, and when the position variation meets a first threshold value, judging that the floater is in a clamping stagnation state at a second position relative to the reed pipe body;
the float at the second location is heated.
Above-mentioned scheme is through comparing two positions to the float in predetermineeing the cycle, thereby can confirm the position variation of float in predetermineeing the cycle, from this position variation and the state that whether the float is in the jamming of the relatively clear definite float of first threshold value, after judging that the float is in the jamming state, the accessible heats the float of this position, under the effect of high temperature, the sticky urea solution of float department can be evaporated in this position, make urea solution crystallization in the surface of tongue tube body, further make urea solution no longer with gluing between float and the tongue tube body, no longer by sticky float under the effect of self gravity this moment, the float can move for the tongue tube body, normal measure the liquid level.
In conclusion, the float and the reed pipe body do not need to be disassembled, the clamping stagnation can be avoided only by heating the clamping stagnation position of the float, the clamping stagnation solving mode is simple and effective, the process of solving the clamping stagnation of the float is effectively simplified, and time and labor are saved.
Optionally, the heating the float at the second position comprises:
and heating the floater at the second position by a heating component at the second position, wherein the heating component comprises a heating resistance wire and a switch corresponding to the heating resistance wire.
Optionally, the heating the float at the second position further comprises:
closing a switch to energize the heating assembly.
Optionally, the acquiring first position information of the float relative to the reed pipe body includes:
first position information and second position information of the float are acquired by the position sensor.
Optionally, the first threshold is 0.
In a second aspect, the present invention provides an anti-sticking device for a liquid level float, comprising: the reed switch comprises a reed switch body, a floater, a magnet piece, a heating assembly, a control assembly and a position detection assembly;
the position detection assembly is used for acquiring the position information of the floater;
the floater is connected with the reed switch body through the magnet piece, and the heating assembly is arranged between the reed switch body and the floater;
the heating assembly is aligned in a direction in which the float moves relative to the reed pipe body.
The position detection assembly and the heating assembly are in signal connection with the control assembly.
Optionally, the number of the heating assemblies is multiple, the heating assemblies are connected in parallel and arranged along the direction in which the floater moves relative to the reed pipe body, each heating assembly comprises a heating resistance wire and a switch corresponding to the heating resistance wire, and the heating resistance wires are annularly arranged on the surface of the reed pipe body.
Optionally, the position detection assembly comprises a position sensor.
Optionally, the control assembly comprises a heating relay.
In a third aspect, the invention provides a urea tank, which comprises the urea tank body and the liquid level float anti-sticking device as described in any one of the above, wherein the liquid level float anti-sticking device is used for detecting the liquid level position of urea solution in the urea tank body.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the float of the present invention in contact with a heating assembly;
FIG. 3 is a schematic flow chart of an embodiment of the present invention;
fig. 4 is a schematic diagram of a determination process in the embodiment of the present invention.
In the figure: 1-urea box body, 2-position sensor, 3-heating relay, 4-reed pipe body, 5-floater, 6-heating resistance wire and 7-switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 2, in a first aspect, the present invention provides a liquid level float anti-sticking device, including: the reed switch comprises a reed switch body 4, a floater 5, a magnet piece, a heating assembly, a control assembly and a position detection assembly;
the position detection component is used for acquiring the position information of the floater 5;
the floats 5 are connected with the reed switch body 4 through the magnet pieces, and a plurality of heating components are arranged between the reed switch body 4 and the floats 5;
the heating components are arranged along the moving direction of the floater 5 relative to the reed pipe body 4, and a plurality of heating components are connected in parallel.
The position detection assembly and the heating assembly are in signal connection with the control assembly.
According to the invention, the plurality of heating assemblies are arranged and arranged along the movement direction of the floater 5, so that the heating assembly can be ensured to heat the clamping stagnation position of the floater 5 when the floater 5 is clamped at any position on the surface of the reed pipe body 4, the clamping stagnation of the floater 5 is avoided to a certain extent, and meanwhile, the heating assemblies at other positions can not enter a working state when the control assembly energizes the heating assemblies by adopting a parallel connection mode among the heating assemblies, so that the power consumption is reduced to a certain extent.
Meanwhile, in the structure, the position detection assembly is used for continuously sending position information of the floater 5 to the control assembly, after the control assembly receives the position information sent by the position detection assembly, the control assembly can compare a first position detected by the position detection assembly with a second position information, so that the position variation of the floater 5 is obtained, when the position variation meets a first threshold value, the control assembly can judge that the floater 5 is in a clamping stagnation state at a second position relative to the reed pipe body 4, and then the control assembly energizes the heating resistance wires 6 communicated with the clamping stagnation position of the floater 5, so that the floater 5 is not adhered to the reed pipe body 4 any more, and the floater 5 is not in the clamping stagnation state any more.
In one embodiment, the heating assemblies comprise heating resistance wires 6 and switches 7 corresponding to the heating resistance wires 6, the heating resistance wires 6 are annularly arranged on the surface of the reed switch body 4, each heating resistance wire 6 is provided with the switch 7 used for communicating, any adjacent heating resistance wire 6 can be controlled respectively, the phenomenon that when one certain heating assembly is started by the control assembly is avoided, all the heating assemblies are started together, and energy consumption is saved.
In one embodiment, the position detection assembly comprises the position sensor 2, and the position information of the floater 5 relative to the reed pipe body 4 can be clearly detected by using the position sensor 2, so that accurate judgment information is provided for the control assembly, and the detection accuracy of the scheme of the invention is improved.
In one embodiment, the control assembly comprises a heating relay 3, and the heating relay 3 has a control system (also called an input loop) and a control system (also called an output loop) so as to control the heating assembly to be opened or closed after receiving the position information.
In one embodiment, the reed switch body 4 is used for detecting the real-time motion state of the float 5 and feeding back the position information to the heating relay 3, at the moment, the heating relay 3 closes the switch 7 located at the float 5, and simultaneously, after the position sensor 2 feeds back the clamping stagnation information of the float 5 to the heating relay 3, the heating relay 3 supplies power to the heating resistance wire 6 at the position of the float 5, because the switch 7 connected with the heating resistance wire 6 is closed, the heating resistance wire 6 generates heat after receiving an electric signal, the position where the float 5 is clamped is heated, and the clamping stagnation problem of the float 5 is solved.
As shown in fig. 3 and 4, in a second aspect, the present invention provides a method for preventing a liquid level float from being stuck, including:
s101, acquiring first position information of the floater 5 relative to the reed pipe body 4;
s102, acquiring second position information of the floater 5 relative to the reed pipe body 4 after a preset period;
s103, obtaining the position variation of the floater 5 according to the first position information and the second position information, and judging that the floater 5 is in a clamping stagnation state at a second position relative to the reed pipe body 4 when the position variation meets a first threshold value;
and S104, heating the floater 5 at the second position.
According to the scheme, the two positions of the floater 5 in the preset period are compared, so that the position variation of the floater 5 in the preset period can be determined, whether the floater 5 is in the clamping stagnation state or not can be clearly determined according to the position variation and the first threshold value, after the floater 5 is determined to be in the clamping stagnation state, the floater 5 at the position can be heated through the urea solution which is sticky at the position under the action of high temperature, the urea solution can be evaporated, the urea solution is crystallized on the surface of the reed pipe body 4, the urea solution is further enabled not to be sticky between the floater 5 and the reed pipe body 4, the floater 5 which is not sticky at this time can move relative to the reed pipe body 4 under the action of the gravity of the floater 5, and the liquid level is measured normally.
In conclusion, the float 5 and the reed switch body 4 do not need to be disassembled, the clamping stagnation can be avoided only by heating the clamping stagnation position of the float 5, the clamping stagnation solving method is simple and effective, the process of solving the clamping stagnation of the float 5 is effectively simplified, and time and labor are saved.
In order to make the solution provided by the embodiment of the present invention easier to understand, the method for preventing the liquid level float from being stuck, and the control flow provided by the embodiment of the present invention are described in detail below by a specific embodiment, and as shown in fig. 2, the flow includes the following steps:
s201, the position sensor 2 starts to work;
s202, acquiring an initial position of the floater 5 relative to the reed pipe body 4 by the position sensor 2, and recording the initial position as M1;
s203, after a preset period T1, the position sensor 2 acquires a second position of the floater 5 relative to the reed pipe body 4, and the second position is marked as M2;
s204, judging whether M1 and M2 meet M1-M2=0, if so, executing S205, otherwise, executing S206;
s205, electrifying the heating assembly at the position of the floater 5 by the heating relay 3 for a fixed period T2;
s206, the floater 5 is not in the clamping stagnation state, and S202-S204 are repeatedly executed.
Meanwhile, in the above step S206, when the float 5 is determined to be in the non-stuck state, the position sensor 2 continues to acquire the position of the float 5 and continuously transmits the position information to the heating relay 3, so that the heating relay 3 continuously determines whether the float 5 is in the stuck state, and then the heating resistance wire 6 at the stuck position of the float 5 is electrified.
In one embodiment, in step S204, the change in displacement of the float 5 in the T1 cycle can be clarified by using the first position and the second position detected by the position sensor 2, and when the change in displacement is 0, it can be directly determined that the float 5 is stuck.
In one embodiment, in the step S203, the preset period T1 ranges from 10min to 15min, for example: within the period of 10min, 11min, 12min, 13min, 14min, 15min and the like, the urea solution is consumed to a certain extent, that is, the liquid level position of the urea solution is changed, so that the method can be used for detecting whether the floater 5 is in a stuck state.
In one embodiment, in the step S205, the fixed period T2 ranges from 10min to 15min, for example: 10min, 11min, 12min, 13min, 14min, 15min and the like, and as also described above, within the range of this period, it can be determined whether the float 5 returns to the normal operating state according to whether the liquid level of the urea solution changes.
In one embodiment, heating the float 5 at the second position comprises:
float 5 through being located the heating element of second position department to second position department heats, heating element is a plurality of, a plurality of heating element are parallelly connected, and arrange for the direction that tongue tube body 4 removed along float 5, every heating element include heating resistor silk 6 and with the switch 7 of heating resistor silk 6 one-to-one, when the jamming problem takes place for float 5, utilize the heating property of heating resistor silk 6 self, can heat the jamming position of float 5 on the tongue tube body 4, and then will cause the urea solution evaporation of float 5 jamming, solve the jamming problem of float 5.
In one embodiment, when the float 5 is stuck on the surface of the reed switch body 4, the situation that the float 5 covers a plurality of heating assemblies is inevitable because the position where the float 5 is stuck is not fixed, and at this time, because the float 5 has good thermal conductivity, evaporation of the urea solution which will cause the sticking of the float 5 can be realized only by closing one of the heating assemblies covered by the float 5.
In an embodiment, a plurality of heating assemblies are connected in parallel, a reed switch body 4 in the structure is used for detecting the real-time motion state of a floater 5 and feeding back the position information to a heating relay 3, at the moment, the heating relay 3 closes a switch 7 located at the floater 5, meanwhile, after a position sensor 2 feeds back the clamping stagnation information of the floater 5 to the heating relay 3, the heating relay 3 supplies power to a heating resistance wire 6 at the position of the floater 5, and as the switch 7 connected with the heating resistance wire 6 is closed, the heating resistance wire 6 generates heat after receiving an electric signal, the position where the floater 5 is clamped is heated, and the clamping stagnation problem of the floater 5 is solved.
In addition, a plurality of heating element arrange along float 5's direction of motion to when having ensured float 5 jamming phenomenon at arbitrary position on the surface of tongue tube body 4, the homoenergetic guarantees that heating element heats float 5 jamming position, avoided the emergence of float 5 jamming phenomenon to a certain extent, adopt parallelly connected mode between every heating element simultaneously, can make control assembly when circular telegram to a certain heating element, the heating element that is located other positions department can not get into operating condition, the consumption of electric power has been reduced to a certain extent.
In one embodiment, the heating assembly comprises heating resistance wires 6 and switches 7 corresponding to the heating resistance wires 6, the heating resistance wires 6 are annularly arranged on the surface of the reed switch body 4, the connection between every two heating resistance wires 6 is not interfered, meanwhile, the switches 7 used for communicating are arranged on every two heating resistance wires 6, any two adjacent heating resistance wires 6 can be controlled respectively, the phenomenon that a plurality of heating assemblies are started together when the heating assembly is started by the control assembly is avoided, and the energy consumption is reduced.
In one embodiment, acquiring first position information of the float 5 relative to the reed switch body 4 includes:
the position sensor 2 is used for acquiring first position information and second position information of the floater 5, the position of the floater 5 is detected by the position sensor 2, and the initial first position and the second position after a preset period of the floater 5 are respectively detected, so that whether the floater 5 is in a clamping stagnation state or not can be judged according to the two position information, and the judgment process is simple and effective.
In one embodiment, heating the float 5 at the second position further comprises:
In a third aspect, as shown in fig. 3, the present invention provides a urea tank, comprising a urea tank body 1 and a liquid level float anti-sticking device as described above, wherein the liquid level float anti-sticking device is used for detecting the liquid level position of the urea solution inside the urea tank body 1, and therefore, in the above components, the reed pipe body 4 and the float 5 are both arranged inside the urea tank body 1, so that the liquid level of the urea solution inside the urea tank body 1 can be accurately measured.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method for preventing liquid level floater from being blocked is characterized by comprising the following steps:
acquiring first position information of a floater relative to a reed switch body;
after a preset period, acquiring second position information of the floater relative to the reed pipe body;
obtaining the position variation of the floater according to the first position information and the second position information, and judging that the floater is in a clamping stagnation state at a second position relative to the reed pipe body when the position variation meets a first threshold value;
the float at the second location is heated.
2. The method of claim 1, wherein heating the float at the second position comprises:
and heating the floater at the second position by a heating component at the second position, wherein the heating component comprises a heating resistance wire and a switch corresponding to the heating resistance wire.
3. The method of claim 2, wherein heating the float at the second position further comprises:
closing a switch to energize the heating assembly.
4. The method of claim 1, wherein the obtaining first position information of the float relative to the reed pipe body comprises:
first position information and second position information of the float are acquired by the position sensor.
5. The method of claim 1, wherein the first threshold is 0.
6. The utility model provides a liquid level float anti-sticking device which characterized in that includes: the reed switch comprises a reed switch body, a floater, a magnet piece, a heating assembly, a control assembly and a position detection assembly;
the position detection assembly is used for acquiring the position information of the floater;
the floater is connected with the reed pipe body through the magnet piece, and the heating assembly is arranged between the reed pipe body and the floater along the radial direction;
the position detection assembly and the heating assembly are in signal connection with the control assembly.
7. The liquid level float anti-clamping device as claimed in claim 6, wherein the number of the heating assemblies is plural, the plural heating assemblies are connected in parallel and arranged along the direction in which the float moves relative to the reed switch body, each heating assembly comprises a heating resistance wire and a switch corresponding to the heating resistance wire, and the heating resistance wire is annularly arranged on the surface of the reed switch body.
8. The level float anti-binding apparatus of claim 6, wherein the position sensing assembly comprises a position sensor.
9. The level float anti-binding device of claim 6, wherein the control assembly comprises a heating relay.
10. A urea tank comprising the urea tank body and the liquid level float anti-sticking device as claimed in any one of claims 6 to 9, the liquid level float anti-sticking device being configured to detect a liquid level position of a urea solution inside the urea tank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211107853.6A CN115420351A (en) | 2022-09-13 | 2022-09-13 | Liquid level floater anti-clamping stagnation method and device and urea box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211107853.6A CN115420351A (en) | 2022-09-13 | 2022-09-13 | Liquid level floater anti-clamping stagnation method and device and urea box |
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| CN115420351A true CN115420351A (en) | 2022-12-02 |
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| CN202211107853.6A Pending CN115420351A (en) | 2022-09-13 | 2022-09-13 | Liquid level floater anti-clamping stagnation method and device and urea box |
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| CN201583323U (en) * | 2010-01-27 | 2010-09-15 | 西安相远科技有限公司 | Piercing floating ball liquid level meter device of electrical heating measuring guide rod |
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