CN110878908B - Liquefied petroleum gas steel bottle liquid level measuring device based on thermal principle - Google Patents
Liquefied petroleum gas steel bottle liquid level measuring device based on thermal principle Download PDFInfo
- Publication number
- CN110878908B CN110878908B CN201911336907.4A CN201911336907A CN110878908B CN 110878908 B CN110878908 B CN 110878908B CN 201911336907 A CN201911336907 A CN 201911336907A CN 110878908 B CN110878908 B CN 110878908B
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- CN
- China
- Prior art keywords
- thermistors
- electric heating
- microprocessor
- electrically connected
- packaging device
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 239000003915 liquefied petroleum gas Substances 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 title claims abstract description 24
- 238000005485 electric heating Methods 0.000 claims abstract description 37
- 238000004806 packaging method and process Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims 3
- 239000007789 gas Substances 0.000 description 8
- 239000012071 phase Substances 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a liquefied petroleum gas steel cylinder liquid level measuring device based on a thermal principle, which relates to the technical field of liquefied petroleum gas devices and comprises a steel cylinder, a control device, a plurality of thermistors, a packaging device, an LED lamp, an electric heating element and a PCB (printed circuit board), wherein the thermistors, the electric heating element, the PCB and the LED lamp are packaged in the packaging device, and the packaging device is detachably fixed on the surface of the steel cylinder; the control device comprises a shell, a battery and a microprocessor, wherein the microprocessor and the battery are fixed in the shell; the microprocessor is electrically connected with the PCB circuit board, a plurality of resistors are arranged on the PCB circuit board, the plurality of resistors are respectively electrically connected with the plurality of thermistors, the microprocessor is electrically connected with the LED lamp, the electric heating element is electrically connected with the battery, and the microprocessor is electrically connected with the battery; the thermistors are distributed at intervals along the vertical direction of the steel cylinder, and the electric heating element is parallel to the straight line where the thermistors are located. The invention can intuitively see the liquid level height of the liquefied petroleum gas in the steel cylinder.
Description
Technical Field
The invention relates to the technical field of liquefied petroleum gas devices, in particular to a liquefied petroleum gas steel cylinder liquid level measuring device based on a thermal principle.
Background
Liquefied petroleum gas is used as clean energy and is used as important fuel in residents, businesses, industry and other places, and is generally taken as a special steel cylinder for bearing, and because the steel cylinder is made of non-transparent materials, the gas allowance in the steel cylinder cannot be directly observed, and a user only finds that the liquefied petroleum gas is used up when the liquefied petroleum gas cannot be ignited, and cannot know the gas amount in advance, so that the use of the user is influenced.
In the prior art, the weight of the steel cylinder is generally weighed by adopting a manner of installing a scale at the bottom, and the residual air in the steel cylinder is calculated.
Therefore, a new liquid level measuring device for a liquefied petroleum gas steel cylinder is urgently needed in the market to solve the above problems.
Disclosure of Invention
The invention aims to provide a liquefied petroleum gas steel cylinder liquid level measuring device based on a thermal principle, which is used for solving the technical problems in the prior art and can intuitively see the residual quantity of liquefied petroleum gas in the steel cylinder.
In order to achieve the above object, the present invention provides the following solutions:
The invention discloses a liquefied petroleum gas steel cylinder liquid level measuring device based on a thermal principle, which comprises a steel cylinder, a control device, a plurality of thermistors, a packaging device, a plurality of LED lamps, an electric heating element and a PCB (printed circuit board), wherein the thermistors, the electric heating element, the PCB and the LED lamps are packaged in the packaging device, the control device is fixed on the packaging device, and the packaging device is detachably fixed on the surface of the steel cylinder;
The control device comprises a shell, a battery and a microprocessor, wherein the microprocessor and the battery are fixed in the shell;
The microprocessor is electrically connected with the PCB circuit board, a plurality of resistors are arranged on the PCB circuit board, the plurality of resistors are respectively electrically connected with the plurality of thermistors, the microprocessor is electrically connected with the LED lamp, the electric heating element is electrically connected with the battery, and the microprocessor is electrically connected with the battery;
The plurality of thermistors are distributed at intervals along the vertical direction of the steel cylinder, the number of the LED lamps is the same as that of the thermistors, the plurality of LED lamps and the plurality of thermistors are in one-to-one correspondence in the horizontal direction, and the electric heating element is parallel to the straight line where the plurality of thermistors are located.
Preferably, the packaging device further comprises two soft magnetic sheets, wherein the two soft magnetic sheets are packaged in the packaging device, and the two soft magnetic sheets are positioned on two sides of the packaging device.
Preferably, the system further comprises a chip, wherein the chip is electrically connected with the microprocessor.
Preferably, the electric heating element comprises a heating box body and an electric heating wire, the electric heating wire is located in the heating box body, one end of the electric heating wire is electrically connected with the battery, and the electric heating wire is parallel to a straight line where the plurality of thermistors are located.
Preferably, the packaging means are two films.
Preferably, the thermistor is a negative temperature coefficient thermistor.
Compared with the prior art, the invention has the following technical effects:
the invention judges the liquid level height of the liquefied petroleum gas in the steel cylinder through the temperature difference and the temperature change rate difference of the gas and the liquid in the steel cylinder. The device has small volume and saves space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a liquid level measuring device for a LPG cylinder based on thermal principle in the present embodiment;
in the figure: 1-chip; 2-a microprocessor; 3-an electrical heating element; 4-cell; 5-film; 6-LED lamps; 7-a thermistor; 8-soft magnetic sheet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a liquefied petroleum gas steel cylinder liquid level measuring device based on a thermal principle, which is used for solving the technical problems in the prior art and can intuitively see the residual quantity of liquefied petroleum gas in the steel cylinder.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the embodiment provides a liquefied petroleum gas steel cylinder liquid level measuring device based on a thermal principle, which comprises a steel cylinder, a control device, a plurality of thermistors 7, a packaging device 5, an LED lamp 6, an electric heating element 3 and a PCB circuit board. The thermistor 7, the electric heating element 3, the PCB circuit board and the LED lamp 6 are packaged in the packaging device 5, and the packaging device is made of transparent materials, so that observation is convenient. The control means are glued to the outer surface of the encapsulation means 5 by means of glue. The packaging device 5 can be detachably fixed on the surface of the steel cylinder and can be conveniently detached as required.
The control device comprises a shell, a battery 4 and a microprocessor 2, wherein the microprocessor 2 and the battery 4 are fixed in the shell.
The microprocessor 2 is electrically connected with a PCB circuit board, a plurality of resistors are arranged on the PCB circuit board and are respectively electrically connected with a plurality of thermistors 7, and after the thermistors 7 are connected with the resistors on the PCB circuit board in series, electric signals are transmitted to the microprocessor 2. The resistor on the PCB circuit board is used for reading the voltage value, and the microprocessor 2 is used for converting the electric signal into a digital signal and processing the digital signal. The microprocessor 2 is electrically connected with the LED lamp 6, and the arrangement resistance in the microprocessor 2 is connected with the LED lamp 6 in series, so that the problem that the LED lamp 6 is burnt out due to overlarge current can be effectively avoided. The electric heating element 3 is electrically connected with the battery 4, and the electric heating element 3 can heat the liquefied petroleum gas in the steel cylinder. The microprocessor 2 is electrically connected with the battery 4, the microprocessor 2 controls the battery 4 to heat the electric heating element 3, the battery 4 is a replaceable battery 4, and the battery 4 can provide electric energy for the microprocessor 2.
The thermistors 7 are distributed at intervals along the vertical direction of the steel cylinder, the height of each thermistor 7 represents the height of the liquid level in the steel cylinder, and the specific number of the thermistors 7 is set according to actual needs. The LED lamps 6 and the thermistors 7 are the same in number, the LED lamps 6 and the thermistors 7 are in one-to-one correspondence in the horizontal direction, and the purpose of the LED lamps 6 is to facilitate the user to visually see the current liquid level height. The electric heating element 3 is arranged parallel to the line in which the plurality of thermistors 7 are located, so as to uniformly heat the steel cylinder.
When the liquid level sensor is used, when the steel bottle is continuously used for a period of time, the temperature of the liquid is lower than that of the gas in the steel bottle due to vaporization and heat absorption of the liquid in the steel bottle, and the current liquid level can be obtained by reading the voltage value on the thermistor 7. If the cylinder is stopped for a period of time at this time, the temperature of the gas and the liquid in the cylinder are the same, the electric heating element 3 is started to uniformly heat the outer wall of the cylinder. During the heat transfer to the thermistor 7, part of the heat is carried away by the liquefied petroleum gas in the cylinder in a heat convection manner. Because the liquid phase liquefied petroleum gas has higher heat conduction speed than the liquefied petroleum gas in the gas phase, and more heat is taken away, the heat on the steel cylinder taken away by the liquefied petroleum gas in the gas phase is less, and the thermistor 7 measures the temperature on the steel cylinder, so that the temperature of the thermistor 7 positioned in the gas phase part rises faster. The microprocessor 2 calculates the rate of change of the resistance of each thermistor 7 by continuously measuring the voltage value across the thermistor 7. And comparing the resistance change rates of the thermistors 7, and obtaining the liquid level in the current steel cylinder by interpolation calculation. After the liquid level is obtained, the microcontroller turns on the LED lamp 6 on the liquid level, so that the current air quantity of the user can be intuitively prompted through the arrangement.
In order to facilitate the fixing of the packaging device 5 on the outer wall of the steel cylinder, the embodiment further comprises two soft magnetic sheets 8, wherein the two soft magnetic sheets 8 are packaged in the packaging device 5, and the two soft magnetic sheets 8 are positioned on two sides of the packaging device 5. In this way, the two sides of the packaging device 5 can be adsorbed on the outer wall of the steel cylinder, so that the packaging device 5 is fixed and removed.
The embodiment also comprises a chip 1, wherein the chip 1 is electrically connected with the microprocessor 2. This arrangement allows the data in the microprocessor 2 to be transferred to the server. The chip 1 is an NB-IoT chip 1, and a person skilled in the art may use other chips 1 according to actual needs, as long as the data of the microprocessor 2 can be transmitted to a server.
The conventional electric heating element 3 is an electric heating wire, and when the electric heating wire is directly contacted with the encapsulation device 5, accidents easily occur. To solve this problem, the electric heating element 3 in this embodiment includes a heating box and an electric heating wire, the electric heating wire is located in the heating box, the heating box is a copper container, one end of the electric heating wire is electrically connected with the battery 4, and the electric heating wire is parallel to a straight line where the plurality of thermistors 7 are located. When the heating device is used, negative pressure steam is flushed into the heating box body, the negative pressure steam in the heating box body is heated by the heating wire, and then the heat of the negative pressure steam is transferred to the heating box body in a thermal convection mode, so that the heat is transferred into the steel bottle. Therefore, accidents can be effectively avoided.
Further, the packaging device 5 in this embodiment is two films. Wherein the film near one side of the steel cylinder is a heat conducting film, and the film far one side of the steel cylinder is a plastic film, so that the external heat can be rapidly transferred to the thermistor 7.
The thermistor 7 in this embodiment is a negative temperature coefficient thermistor 7. The ptc thermistor 7 or other thermistors 7 may also be used by those skilled in the art, as long as the resistance changes regularly with temperature changes.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (3)
1. Liquefied petroleum gas steel bottle liquid level measurement device based on thermal principle, its characterized in that: the LED lamp packaging device comprises a steel bottle, a control device, a plurality of thermistors, a packaging device, an LED lamp, an electric heating element and a PCB (printed circuit board), wherein the thermistors, the electric heating element, the PCB and the LED lamp are packaged in the packaging device, the control device is fixed on the packaging device, and the packaging device is detachably fixed on the surface of the steel bottle;
The control device comprises a shell, a battery and a microprocessor, wherein the microprocessor and the battery are fixed in the shell;
The microprocessor is electrically connected with the PCB circuit board, a plurality of resistors are arranged on the PCB circuit board, the plurality of resistors are respectively electrically connected with the plurality of thermistors, the microprocessor is electrically connected with the LED lamp, the electric heating element is electrically connected with the battery, and the microprocessor is electrically connected with the battery;
the plurality of thermistors are distributed at intervals along the vertical direction of the steel cylinder, the number of the LED lamps is the same as that of the thermistors, the plurality of LED lamps and the plurality of thermistors are in one-to-one correspondence in the horizontal direction, and the electric heating element is parallel to the straight line where the plurality of thermistors are located;
The packaging device comprises a packaging device, a soft magnetic sheet, a packaging device and a magnetic sheet, wherein the packaging device is used for packaging the soft magnetic sheet;
the microprocessor is electrically connected with the power supply, and also comprises a chip which is electrically connected with the microprocessor;
The electric heating element comprises a heating box body and an electric heating wire, the electric heating wire is positioned in the heating box body, one end of the electric heating wire is electrically connected with the battery, and the electric heating wire is parallel to a plurality of straight lines where the thermistors are positioned.
2. The liquefied petroleum gas cylinder level measurement device based on thermal principles of claim 1, wherein: the packaging device is provided with two films.
3. The liquefied petroleum gas cylinder level measurement device based on thermal principles of claim 1, wherein: the thermistor is a negative temperature coefficient thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911336907.4A CN110878908B (en) | 2019-12-23 | 2019-12-23 | Liquefied petroleum gas steel bottle liquid level measuring device based on thermal principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911336907.4A CN110878908B (en) | 2019-12-23 | 2019-12-23 | Liquefied petroleum gas steel bottle liquid level measuring device based on thermal principle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110878908A CN110878908A (en) | 2020-03-13 |
| CN110878908B true CN110878908B (en) | 2024-05-17 |
Family
ID=69731131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911336907.4A Active CN110878908B (en) | 2019-12-23 | 2019-12-23 | Liquefied petroleum gas steel bottle liquid level measuring device based on thermal principle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110878908B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2044726U (en) * | 1988-03-16 | 1989-09-20 | 王运朋 | Measurer for measuring reserve in steel cylinder of petroleum gas |
| CN1501033A (en) * | 2002-11-18 | 2004-06-02 | 吴定发 | Compound quantitative quick heating system special for liquid fuel |
| AU2006233244A1 (en) * | 2005-10-31 | 2007-05-17 | University Of South Australia | Liquid nitrogen level control system |
| CN204494071U (en) * | 2015-01-04 | 2015-07-22 | 上海雷尼威尔技术有限公司 | A kind of LNG basin device |
| CN211203645U (en) * | 2019-12-23 | 2020-08-07 | 汤森虤 | Liquefied petroleum gas steel cylinder liquid level measuring device based on thermal principle |
-
2019
- 2019-12-23 CN CN201911336907.4A patent/CN110878908B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2044726U (en) * | 1988-03-16 | 1989-09-20 | 王运朋 | Measurer for measuring reserve in steel cylinder of petroleum gas |
| CN1501033A (en) * | 2002-11-18 | 2004-06-02 | 吴定发 | Compound quantitative quick heating system special for liquid fuel |
| AU2006233244A1 (en) * | 2005-10-31 | 2007-05-17 | University Of South Australia | Liquid nitrogen level control system |
| CN204494071U (en) * | 2015-01-04 | 2015-07-22 | 上海雷尼威尔技术有限公司 | A kind of LNG basin device |
| CN211203645U (en) * | 2019-12-23 | 2020-08-07 | 汤森虤 | Liquefied petroleum gas steel cylinder liquid level measuring device based on thermal principle |
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| Publication number | Publication date |
|---|---|
| CN110878908A (en) | 2020-03-13 |
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