CN217084824U - Beam tube monitoring system based on thermistor temperature measurement - Google Patents
Beam tube monitoring system based on thermistor temperature measurement Download PDFInfo
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- CN217084824U CN217084824U CN202122500640.7U CN202122500640U CN217084824U CN 217084824 U CN217084824 U CN 217084824U CN 202122500640 U CN202122500640 U CN 202122500640U CN 217084824 U CN217084824 U CN 217084824U
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Abstract
The utility model discloses a beam tube monitoring system based on thermistor temperature measurement, this system includes: the inner walls of the temperature measuring beam tubes and the transmission beam tubes of the beam tube devices are provided with a first lead, a second lead and a third lead; in the temperature measuring beam tube, the front end of the temperature measuring beam tube is provided with a thermistor which is respectively and electrically connected with a first lead and a second lead, and the second lead is electrically connected with a third lead. The rear ends of the temperature measuring beam tube and the transmission beam tube are respectively provided with three grooves which are respectively connected with the rear ends of the three wires; the front end of the transmission beam tube is provided with three plugs connected with the front ends of the three wires; the plug is correspondingly connected with the groove, so that the rear transmission beam tube is connected with the front temperature measuring beam tube or the front transmission beam tube. The utility model discloses an adopt the structure of three wires to eliminate the influence of wire resistance itself to measuring result, mark the temperature to make measured temperature value more accurate.
Description
Technical Field
The utility model relates to a colliery is gaseous beam tube monitoring field in the pit, especially a beam tube monitoring system based on thermistor temperature measurement.
Background
In large mines in China, 72.1% of mines have coal bed spontaneous combustion disasters, and fires caused by coal spontaneous combustion account for 90% -94% of the total number of mine fires according to incomplete statistics: the coal spontaneous combustion hidden danger of coal spontaneous combustion fire in China is more than 4000 times every year, and because the number of closed working faces of the coal spontaneous combustion fire is nearly 100, the direct and indirect economic loss exceeds hundreds of billions of yuan. With the increasing mining intensity of coal mines, the continuous extension and deep development of mines, the mining of close-distance coal beds and the relative complexity of ventilation systems, the spontaneous combustion tendency of the coal beds has a trend of increasing obviously. Spontaneous combustion ignition of coal in the goaf accounts for a high proportion of mine fires, so that monitoring and early warning of the goaf fires are always important for people to pay attention to and research.
The development of coal spontaneous combustion is a complex dynamic evolution process. The coal can cause physical and chemical changes of the coal and surrounding media in the spontaneous combustion process, the physical and chemical changes are mainly expressed as the temperature rise of coal rock temperature, gas release, smoke generation and the like, the natural coal ignition state can be inferred according to the characteristic information, and the spontaneous combustion fire of the coal can be predicted and forecasted in time. In the past, most of mine fire bundle pipe monitoring adopts a mode of combining bundle pipe air pump sampling with chromatographic analysis, and the mode can only measure and analyze the gas condition of a certain measuring point, but cannot monitor the temperature of the measuring point.
The current monitoring technology for measuring the temperature has the following problems: meanwhile, the embedding of the beam tube and the thermistor is complicated, and the labor cost is high; in the existing beam tube system, the thermistor is usually connected with a longer lead, and the resistance of the lead can have a larger influence on the temperature measurement result. Therefore, it is highly desirable to develop a beam tube monitoring system that can solve the above problems, so that it can effectively monitor and early warn the fire in the goaf.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that above-mentioned prior art exists, provide a beam tube monitoring system based on thermistor temperature measurement, not only install and lay simple and conveniently, reduced the cost of labor, can effectively improve temperature measurement's accuracy moreover.
The utility model discloses a beam tube monitoring system based on thermistor temperature measurement, including a plurality of hollow beam tube devices, the beam tube device includes: the rear end of the temperature measuring beam tube is connected with a plurality of transmission beam tubes which are connected in sequence;
the inner walls of the temperature measuring beam tube and the transmission beam tube are provided with a first lead, a second lead and a third lead; the front end of the temperature measuring beam tube is provided with a thermistor, the thermistor is respectively and electrically connected with the first lead and the second lead, and the second lead is electrically connected with the third lead;
the rear ends of the temperature measuring beam tube and the transmission beam tube are respectively provided with a first lead, a second lead and a third lead which are connected with the rear ends of the first lead, the second lead and the third lead: a first groove, a second groove and a third groove; the front end of the transmission beam tube is provided with a first plug, a second plug and a third plug which are connected with the front ends of the first lead, the second lead and the third lead; the first groove, the second groove and the third groove are respectively and correspondingly connected with the first plug, the second plug and the third plug, so that the rear transmission beam tube is connected with the front temperature measuring beam tube or the front transmission beam tube.
Furthermore, a plurality of the tube bundle devices are arranged in a goaf along a transportation or return air crossheading in a bundle form, wherein measuring points are arranged on the temperature measuring tube bundle of each tube bundle device at certain intervals and are used for sampling and measuring the temperature of each measuring point.
Furthermore, the beam tube device is also provided with a quick connector, and the temperature measuring beam tube arranged at the measuring point is also connected with the adjacent transmission beam tube through the quick connector.
Furthermore, a bundle tube protective sleeve is arranged outside each bundle tube device, a single tube protective sleeve is arranged outside each temperature measurement bundle tube of the measurement point, and a plurality of air holes are formed in the single tube protective sleeve.
Furthermore, the thermistor is embedded in the section of the front end of the temperature measuring beam tube; the thermistor is a PT100 type thermistor.
Further, the first conductor, the second conductor and the third conductor are all armored pure copper shielded signal lines.
Further, the outer walls of the beam tube devices are provided with color coatings with different colors.
Further, the beam tube monitoring system further comprises: a multimeter for determining a resistance value of the thermistor of the bundle tube device by connecting the first, second and third wires at the end of the bundle tube device.
Further, the beam tube monitoring system further comprises:
the air pump is arranged corresponding to the tail end of the beam tube device and is used for pumping a gas sample of the measuring point through the beam tube device;
and the chromatograph is used for detecting the composition and the corresponding content of the gas sample.
The utility model discloses following beneficial effect has at least:
the utility model discloses an adopt the structure of three wires to eliminate the influence of wire resistance itself to measuring result, mark the temperature to make measured temperature value more accurate. The utility model discloses simple structure, simple operation, performance are excellent, have extensive application prospect.
Other advantageous effects of the present invention will be described in detail in the detailed description of the preferred embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a temperature measuring beam tube disclosed in a preferred embodiment of the present invention.
Fig. 2 is a front structure view of the temperature measuring beam tube disclosed in the preferred embodiment of the present invention.
Fig. 3 is a rear structure view of the temperature measuring beam tube/transmission beam tube disclosed in the preferred embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a transmission beam tube according to the preferred embodiment of the present invention.
Fig. 5 is a layout structure diagram of the bundle pipe device according to the preferred embodiment of the present invention.
FIG. 6 is a graph showing a comparison of the temperature before and after the calibration when the thermistor connecting lead is 100m in length.
FIG. 7 is a graph showing a comparison of the temperature before and after calibration when the thermistor connecting lead is 200m in length.
FIG. 8 is a graph showing a comparison of the temperature before and after calibration when the thermistor connecting lead is 100m in length.
FIG. 9 is a graph showing temperature comparison before and after calibration of thermistor connected to different lengths of wire.
The temperature measuring device comprises a temperature measuring beam tube 101, a temperature measuring beam tube 102, a transmission beam tube 2, a first lead wire 3, a thermistor 4, a second lead wire 5, a third lead wire 11, a beam tube protective sleeve 12, a beam tube device 13, a quick connector 14, an air vent and a single tube protective sleeve 15.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in figures 1-4, the utility model discloses a beam tube monitoring system based on thermistor temperature measurement, including a plurality of hollow beam tube devices, each beam tube device corresponds a measurement station, can extract the gas appearance of measurement station and detect the temperature of measurement station through a beam tube device promptly, when having a plurality of measurement stations in the collecting space area, the utility model discloses also set up the beam tube device that corresponds quantity.
The bundle tube device is formed by sequentially connecting a plurality of single bundle tubes, the single bundle tubes are divided into two types, namely a temperature measurement bundle tube 101 and a transmission bundle tube 102, the single bundle tube at the front end of the bundle tube device is the temperature measurement bundle tube 101, and the rear end of the temperature measurement bundle tube 101 is connected with the transmission bundle tubes 102 which are sequentially connected.
The temperature measuring beam tube 101 and the transmission beam tube 102 are the same, and the inner walls thereof are provided with a first lead 2, a second lead 4 and a third lead 5, so that in one beam tube device, the first leads 2 of the single beam tubes are connected in sequence, and similarly, the same is true for the second lead 4 and the third lead 5; the difference between the two is that the temperature measuring beam tube 101 needs to be arranged at a measuring point, so the front end of the temperature measuring beam tube is provided with the thermistor 3, the thermistor 3 is respectively and electrically connected with the first lead 2 and the second lead 4, and the second lead 4 and the third lead 5 are electrically connected, which is also an electrical connection structure for revising the measured temperature later.
In order to facilitate the installation and connection of the bundle pipe device, the rear ends of the temperature measuring bundle pipe 101 and the transmission bundle pipe 102 are respectively provided with a first lead 2, a second lead 4 and a third lead 5, which are respectively connected with the rear ends of the first lead 2, the second lead 4 and the third lead 5: a first groove, a second groove and a third groove; the front end of the transmission beam tube 102 is provided with a first plug, a second plug and a third plug which are connected with the front ends of the first lead 2, the second lead 4 and the third lead 5; the first groove, the second groove and the third groove are respectively and correspondingly connected with the first plug, the second plug and the third plug, so that the rear transmission beam tube 102 is connected with the front temperature measurement beam tube 101 or the front transmission beam tube 102. The plugs can be independently arranged on the single bundle tubes and connected with the wires, or the front ends of the wires are exposed to form a section to be used as the plug during installation, so that the effective connection among the single bundle tubes is ensured, and the structure is simplified.
The utility model discloses compare in prior art, adopt the monomer beam tube to connect gradually in segmentation, the installation is simple and practice thrift the human cost, in addition, adopts and to obtain thermistor 3's accurate resistance value through measuring three wire, and the calculated result is accurate reliable, has realized that gas sampling analysis and temperature detect's high efficiency go on in step, and then can be more in time effectively monitor the early warning to collecting space area conflagration.
The utility model discloses a in some embodiments, beam tube monitoring system still includes aspiration pump and chromatograph, its with the terminal corresponding setting of beam tube device, staff passes through beam tube device collection goaf with the aspiration pump and a certain measurement station gas, is brought back to ground by the manual work, and the rethread chromatograph is to the gas composition and the concentration of gathering the gas sample analysis, judges the condition of a fire through the trend of change of gas composition and concentration and changes.
In some embodiments of the present invention, the beam tube monitoring system further comprises: multimeter for connectingThe first, second and third wires 2, 4, 5 at the end of the tube bundle device determine the resistance of the thermistor 3 of the tube bundle device. Specifically, the wires can be manually led out from the tail end of the tube bundling device, and then the resistance value R between the first wire 2 and the second wire 4 is measured by using a universal meter General assembly Then, the resistance R between the second wire 4 and the third wire 5 is measured by a universal meter L Then the actual resistance R of the thermistor 3 t ＝R General assembly -2×R L And obtaining the temperature of the measuring point by using a comparison table of the temperature and the resistance value of the thermistor 3. The look-up table may be prepared in advance.
In some embodiments of the present invention, the temperature measuring beam tube 101 mainly includes: tube body, pure copper shielding signal line A 1 (first lead 2), thermistor 3, pure copper shielded signal line B 1 (second wire 4), pure copper shield signal line A 2 (third conductor 5), pure copper shield signal line A 1 Pure copper shielded signal line B 1 Pure copper shielded signal line A 2 Are respectively arranged in the tube wall of the beam tube at a certain angle, and a pure copper shielding signal wire A is arranged at one end of the beam tube 1 And a pure copper shielded signal line B 1 A thermistor 3 is connected between the two ends, the resistor is embedded in the tube wall of the beam tube, and the pure copper shields the signal wire B 1 Shield the signal line A with pure copper 2 The two ends of the beam tube are directly connected by a lead, namely the tail ends of three pure copper shielding signal wires are correspondingly provided with a groove structure, the rear end of each transmission beam tube 102 connected subsequently is the same as the first beam tube (the temperature measuring beam tube 101), and the front pure copper shielding signal wire protrudes partially, so that the front pure copper shielding signal wire can be connected with the tail end of the previous single beam tube.
In the manufacturing process of the single beam tube, a small hole needs to be formed in the wall of the tube wall at a certain angle (90 degrees in the figure), the diameter of the hole is slightly larger than the diameter of the pure copper shielding signal wire, and the tube wall of the whole single beam tube is communicated and used for arranging the pure copper shielding signal wire. In addition, the utility model discloses a monomer beam tube is preferred to be the straight tube type beam tube, also can select for use the beam tube of heterotypic structures such as L type according to actual conditions.
In some embodiments of the present invention, the thermistor 3 is a PT100 type thermistor 3, and the resistance value and the temperature substantially conform to the function R ═ 0.39T + 100. The types of the thermistors 3 comprise PTC type and NTC type, the PTC type thermistors 3 take barium titanate as a main material, the resistance value of the thermistors is increased along with the rise of the temperature, and the thermistors have the characteristics of no redness, no open fire, difficult combustion and the like; the NTC thermistor 3 uses metal oxide as a main material, the resistance value of the NTC thermistor is reduced along with the rise of temperature, the variation span of the resistance value along with the temperature is large, the error of a measurement result is large, and the PTC thermistor 3 is mostly adopted in underground coal mines.
The pure copper shielding signal line A 1 Pure copper shielded signal line B 1 Pure copper shielded signal line A 2 And the three signal wires are armored to reduce the friction between the three signal wires and the tube wall hole of the beam tube.
The chromatograph is a conventional gas analyzer for detecting the gas composition and the content of each component. The basic principle is that sample gas is carried in by carrier gas, and the components are separated by chromatographic column and are led into detector in turn to obtain detection signal related to the content of each component. According to the sequence of leading in the detector, the components can be distinguished by comparison, and the content of each component can be calculated according to the peak height or peak area.
The water bath thermostat is used for calibration experiments, the experimental results are shown in fig. 6 to 9, and it can be seen that the influence of the resistance value of the lead on the thermistor 3 is larger and larger along with the rise of the temperature, so that the measurement error is caused, when the length of the lead is 100m, the temperature after calibration is 3-4 ℃ more accurate than that before calibration, when the length of the lead is 200m, the temperature after calibration is 5-7 ℃ more accurate than that before calibration, and when the length of the lead is 300m, the temperature after calibration is 8-11 ℃ more accurate than that before calibration. It can be seen from fig. 9 that as the length of the lead wire is longer and longer, the influence of the calibrated lead wire on the thermistor 3 is larger and larger, and the temperature difference after calibration is still maintained between 0.2 and 0.4, so that the accuracy of temperature measurement is greatly improved, and the fire situation of the goaf can be correctly judged.
The beam tube monitoring system based on thermistor temperature measurement can adopt the following steps to realize accurate measurement of temperature:
s1: measuring the resistance value R between a first lead and a second lead at the tail end of a beam tube device under the condition that a thermistor of the beam tube device is arranged at a measuring point General assembly ；
S2: measuring the resistance R between the second and third wires 5 L ；
S3: based on the resistance R General assembly And the resistance R L Calculating the resistance R of the thermistor 3 t ；
S4: temperature corresponding relation and resistance R based on known thermistor t And determining the temperature of the measuring point.
In order to further explain the technical proposal, the utility model also discloses the following embodiments.
As shown in fig. 1 to 5, the length of the bundle tube is L (20m), for example, in the process of laying a single bundle tube, because the first bundle tube and the subsequent bundle tube are structured, they can be quickly connected in a manner similar to a socket, and are further fixed by a tube hoop outside the bundle tube, the bundle tube device 12 can bundle four bundle tube devices 12 (which can also be increased or decreased according to actual conditions) into a four-core bundle tube in a bundling manner, and each bundle tube is distinguished by different colors, so as to more easily distinguish the monitored location of each bundle tube.
A bundle pipe protective sleeve 11 is additionally arranged outside the bundle pipe, the bundle pipe is arranged in a goaf along a transportation or return air crossheading, a single bundle pipe (a temperature measuring bundle pipe 101) is connected from the inside of the bundle pipe through a quick connector 13 every L (20m) and used for sampling gas at the place and testing the temperature of the place, a single pipe protective sleeve 15 is arranged outside the single pipe protective sleeve, and an air vent 14 is arranged on the protective sleeve. The quick connector 13 may be of a conventional connector configuration, so that it can be fitted to the above-described connection structure.
When the gas concentration of a certain measuring point is measured, a gas sample of the measuring point is extracted through the beam tube device 12 by a manual air extracting pump, the gas sample is brought back to the ground after recording, a chromatograph is used for analyzing the gas sample, and when the gas concentration is to be measured, the fire hazard trend of the goaf is judged by using the gas concentration variation trend.
When measuring the temperature of a certain measuring point, the temperature measuring beam tube 101 is utilizedThe thermistor 3 can lead out the lead at the tail end of the beam tube manually because the pure copper shielding signal wire is arranged in the tube wall of the beam tube, and then the multimeter is used for measuring the pure copper shielding signal wire A 1 And a pure copper shielded signal line B 1 Resistance value R between General assembly And then a multimeter is utilized to measure a pure copper shielding signal wire B 1 Shield the signal line A with pure copper 2 Resistance value R between L Then the actual resistance R of the thermistor 3 t ＝R General assembly -2×R L And obtaining the temperature of the measuring point by using a comparison table of the temperature and the resistance value of the thermistor 3.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.
Claims (9)
1. The utility model provides a beam tube monitoring system based on thermistor temperature measurement which characterized in that includes a plurality of hollow beam tube devices, the beam tube device includes: the rear end of the temperature measuring beam tube is connected with a plurality of sequentially connected transmission beam tubes;
the inner walls of the temperature measuring beam tube and the transmission beam tube are provided with a first lead, a second lead and a third lead; the front end of the temperature measuring beam tube is provided with a thermistor, the thermistor is respectively and electrically connected with the first lead and the second lead, and the second lead is electrically connected with the third lead;
the rear ends of the temperature measuring beam tube and the transmission beam tube are respectively provided with a first lead, a second lead and a third lead which are connected with the rear ends of the first lead, the second lead and the third lead: a first groove, a second groove and a third groove; the front end of the transmission beam tube is provided with a first plug, a second plug and a third plug which are connected with the front ends of the first lead, the second lead and the third lead; the first groove, the second groove and the third groove are respectively and correspondingly connected with the first plug, the second plug and the third plug, so that the rear transmission beam tube is connected with the front temperature measuring beam tube or the front transmission beam tube.
2. The thermistor thermometry-based bundle tube monitoring system according to claim 1, wherein a plurality of the bundle tube devices are arranged in a bundled manner in a gob along a transportation or return air gateway, wherein the temperature measuring bundle tubes of each bundle tube device are arranged at intervals at each measuring point for gas sampling and temperature measurement at each measuring point.
3. The system as claimed in claim 2, wherein the tube bundle device further comprises a quick connector, and the temperature measuring tube bundle at the measuring point is further connected to the adjacent transmission tube bundle through the quick connector.
4. The system as claimed in claim 2, wherein a bundle tube protective sleeve is provided outside each bundle tube device, a single tube protective sleeve is provided outside each temperature measuring bundle tube at the measuring point, and a plurality of air holes are provided on the single tube protective sleeve.
5. The system as claimed in claim 1, wherein the thermistor is embedded in the front section of the temperature measuring beam tube; the thermistor is a PT100 type thermistor.
6. The thermistor thermometry-based bundle tube monitoring system of claim 1, wherein the first wire, the second wire, and the third wire are all armored pure copper shielded signal wires.
7. The thermistor thermometry-based bundle tube monitoring system of claim 1, wherein the outer walls of the bundle tube devices are provided with a color coating of a different color.
8. The thermistor thermometry-based beam tube monitoring system of claim 1, further comprising: a multimeter for determining a resistance value of the thermistor of the bundle tube device by connecting the first, second and third wires at the end of the bundle tube device.
9. The thermistor thermometry-based beam tube monitoring system according to any one of claims 1-8, further comprising:
the air pump is arranged corresponding to the tail end of the beam tube device and is used for pumping a gas sample of the measuring point through the beam tube device;
and the chromatograph is used for detecting the composition and the corresponding content of the gas sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122500640.7U CN217084824U (en) | 2021-10-18 | 2021-10-18 | Beam tube monitoring system based on thermistor temperature measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122500640.7U CN217084824U (en) | 2021-10-18 | 2021-10-18 | Beam tube monitoring system based on thermistor temperature measurement |
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| Publication Number | Publication Date |
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| CN217084824U true CN217084824U (en) | 2022-07-29 |
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| CN202122500640.7U Active CN217084824U (en) | 2021-10-18 | 2021-10-18 | Beam tube monitoring system based on thermistor temperature measurement |
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- 2021-10-18 CN CN202122500640.7U patent/CN217084824U/en active Active
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