CN111044104A - Device for measuring internal temperature and atmosphere of coal pile - Google Patents
Device for measuring internal temperature and atmosphere of coal pile Download PDFInfo
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- CN111044104A CN111044104A CN201911400752.6A CN201911400752A CN111044104A CN 111044104 A CN111044104 A CN 111044104A CN 201911400752 A CN201911400752 A CN 201911400752A CN 111044104 A CN111044104 A CN 111044104A
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- 239000003245 coal Substances 0.000 title claims abstract description 81
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 26
- 239000010935 stainless steel Substances 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 238000003466 welding Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 230000002269 spontaneous effect Effects 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 102
- 238000005259 measurement Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 239000002802 bituminous coal Substances 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- General Physics & Mathematics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention provides a device for measuring the internal temperature and atmosphere of a coal pile. The device comprises a measuring rod, a gas sampling unit, a temperature sensor, a gas temperature and humidity detection unit, a gas component detection unit and an outer connecting rod; the one end of measuring staff is connected gaseous sampling unit, and temperature sensor is unsettled in the measuring staff inside and not with the contact of measuring staff inner wall, is located the one end that the measuring staff connects gaseous sampling unit, and gaseous temperature and humidity detecting unit is connected to the other end of measuring staff, and gaseous temperature and humidity detecting unit passes through outer connecting rod and connects gaseous composition detecting element. The device can quickly and accurately measure the internal temperature of the coal pile and simultaneously detect the internal atmosphere including O2CO, temperature, humidity and the like, and provides more abundant information for accurately judging or researching the heat loss and the spontaneous combustion tendency in the coal pile.
Description
Technical Field
The invention belongs to the technical field of coal pile safety monitoring, and relates to a device for measuring the internal temperature and atmosphere of a coal pile.
Background
Coal is a main primary energy source in China at present and for a long time in the future, although the coal can be forcedly ignited and combusted (quickly oxidized) under a high-temperature condition, in fact, the coal still has a slow oxidation phenomenon under a normal-temperature environment, and an oxidation process is accompanied with a heat release process, so that the internal temperature of a coal pile can be gradually increased in the long-time stacking process of the coal pile, and the oxidation heat release process is accelerated after the temperature is increased. Therefore, the coal can be subjected to heat loss and even spontaneous combustion in the storage process, so that certain economic loss and even environmental pollution are caused. The reactivity of coal is different, and the slow oxidation speed is different. For coal with poor reactivity, the slow heat release and the natural heat dissipation energy of the coal pile are generally balanced, so that obvious heat loss or spontaneous combustion cannot be caused, and for coal with good reactivity, such as high-volatile bituminous coal, especially lignite, the spontaneous combustion phenomenon of the coal pile is very common. Therefore, how to monitor the heat loss and spontaneous combustion of the coal pile in the process of storing and transporting high-volatile bituminous coal and lignite is a problem of high concern to storage and transportation personnel. The method for judging the heat loss trend of the coal pile or preventing spontaneous combustion by monitoring the internal temperature of the coal pile is a commonly adopted method at present, and most of the methods adopt a smoke temperature measuring device to detect the internal temperature of the coal pile on line or regularly. At present, various temperature measuring devices with different structures basically have the following defects: (1) the core structure is basically that a temperature sensor is arranged in the insertion end of a temperature measuring rod (steel pipe) and is sealed, the steel pipe has a heat exchange process from outside to inside, and the steel pipe also has a heat exchange process from one end to the other endGood heat conductivity, so that the rapidity and accuracy of measurement deviate to a greater or lesser extent. (2) The oxidation of coal requires the participation of oxygen, consuming oxygen and producing CO2When oxygen in the coal pile is exhausted, the gas such as CO is unlikely to be deteriorated even if the temperature is high, so that the simple detection of the internal temperature of the coal pile has certain limitation, even the coal pile is possibly over-treated, a new oxidation environment is formed, and the heat loss is increased or accelerated. (3) The insertion end generally adopts a pointed end structure or an electric drill structure, and aims to facilitate the insertion into the deep inside of a coal pile, but certain difficulty (the pointed end can support a coal briquette) or complexity still exists in actual operation.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a device for measuring the internal temperature and atmosphere of a coal pile. The invention aims to quickly and accurately measure the internal temperature of a coal pile and simultaneously detect the internal atmosphere including O2CO, temperature, humidity and the like, and provides more abundant information for accurately judging or researching the heat loss and the spontaneous combustion tendency in the coal pile.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the device for measuring the internal temperature and atmosphere of the coal pile comprises a measuring rod, a gas sampling unit, a temperature sensor, a gas temperature and humidity detection unit, a gas component detection unit and an outer connecting rod.
The one end of measuring staff is connected gaseous sampling unit, and temperature sensor is unsettled in the measuring staff inside and not with the contact of measuring staff inner wall, is located the one end that the measuring staff connects gaseous sampling unit, and gaseous temperature and humidity detecting unit is connected to the other end of measuring staff, and gaseous temperature and humidity detecting unit passes through outer connecting rod and connects gaseous composition detecting element.
The measuring rod is a stainless steel pipe, is convenient to insert into the deep part of the coal pile and keeps good rigidity.
Preferably, the stainless steel pipe with the outer diameter of 10mm-20mm has the wall thickness of more than 1mm, and the length of the measuring rod is determined according to the depth of a temperature point required to be measured.
The gas acquisition unit comprises a steel ball fastening screw, a cylindrical lengthened nut, a positioning point and a vent groove.
The steel ball set screw is a standard component and is arranged at the tail end of the insertion end of the measuring device, so that the measuring device can be conveniently and smoothly inserted into the coal pile.
The cylindrical lengthened nut is a standard component and used for installing the steel ball set screw, the type of an inner thread of the cylindrical lengthened nut is matched with the steel ball set screw, and the outer diameter of the cylindrical lengthened nut is slightly smaller than the outer diameter of the measuring rod and is welded at the end part of the measuring rod.
The locating points are welding points, 1-2 welding points are welded on the inner wire of the cylindrical lengthened nut at the welding position of the cylindrical lengthened nut and the measuring rod through electric welding spot welding, and the welding points are used for preventing the steel ball fastening screw from being screwed in or automatically screwed in the measuring rod when being stressed.
The ventilation grooves are open grooves cut at the end part of the measuring rod along the length direction, the number of the ventilation grooves is 2-4, and the ventilation grooves are used for enabling gas at measuring points inside the coal pile to enter the measuring rod, so that the temperature sensor can rapidly measure the temperature at the corresponding measuring points on one hand, and the ventilation grooves are used for leading the gas out of the measuring rod to measure gas components on the other hand. The length of the vent groove is 3cm-10cm, and the width of the vent groove is 2mm-4mm, so that the vent groove is prevented from being completely blocked by coal particles, and the coal particles entering the measuring rod are convenient to clean.
The temperature sensor is used for measuring the temperature of a measuring point inside the coal pile and adopts a thermocouple or a thermal resistor. The temperature sensing point of the temperature sensor is not reached along the length direction of the measuring rod but is close to the tail end of the measuring rod. In order to avoid temperature deviation caused by heat conduction of the steel pipe, a temperature sensing point of the temperature sensor is suspended in the measuring rod and cannot be in contact with the wall of the steel pipe, a simple method is to tie a lead close to the temperature sensing point, and the temperature sensing point is suspended in the middle of the lead tie.
The gas temperature and humidity detection unit comprises a temperature and humidity sensor, a temperature and humidity wiring, a temperature and humidity cylinder and a temperature and humidity screw cover.
The temperature and humidity sensor is used for measuring the temperature and the humidity of gas escaping from the coal pile through the vent groove.
The temperature and humidity wiring is a power supply and signal connection line of the temperature and humidity sensor.
The temperature and humidity cylinder is a section of stainless steel pipe, the inner diameter of the temperature and humidity cylinder is suitable for being filled with a temperature and humidity sensor and further having a gas circulation space, and a standard part is adopted.
The temperature and humidity screw cover adopts a standard component matched with the temperature and humidity cylinder body, and the invention adopts a 1 inch stainless steel pipe cap. One end of the temperature and humidity screw cap is provided with a hole and is coaxially welded with the measuring rod, and the aperture is matched with the inner diameter of the measuring rod. When the temperature and humidity screw cover is connected with the temperature and humidity cylinder body, a gasket or a raw material belt is adopted for sealing.
The gas component detection unit comprises a gas component sensor, a gas component wiring, a gas component cylinder, a gas component screw cap, a wiring terminal, a wiring box, a thin nut and a gas escape hole.
The gas component sensor adopts an electrochemical gas sensor, the type and the quantity of the sensors are determined according to the components of gas to be detected, and O is adopted in the invention2And a CO sensor.
The gas component connection wire is a power supply and signal connection wire of the gas component sensor.
The gas component cylinder is a section of stainless steel tube, the inner diameter of the cylinder is suitable for being filled with a gas component sensor and having a gas circulation space, a standard part can be selected, and the gas component cylinder adopts a 1-inch external thread stainless steel tube with the length of 10 cm.
The gas component screw cap adopts a standard component matched with the gas component cylinder body, and the invention adopts a 1 inch stainless steel pipe cap. When the gas component screw cap is connected with the gas component cylinder, a gasket or a raw material belt is needed for sealing.
The wiring terminal is used for collecting wiring of the temperature sensor, the temperature and humidity sensor and the gas composition sensor, and is convenient to be in butt joint with a power line and a signal line of an external measuring instrument.
The junction box is used for installing a wiring terminal.
The thin nut is a standard component and is used for clamping and installing the junction box on the gas component cylinder, and the type of the thin nut is matched with that of the gas component cylinder.
The gas escape hole is formed by forming one or more round holes on the junction box and is used for natural flowing escape of gas in the coal pile.
The outer connecting rod for connect gaseous temperature and humidity measurement unit and gaseous composition detecting element, aim at detects the separation with temperature and humidity measurement and gaseous composition, during the measurement, gaseous temperature and humidity measurement unit inserts the certain degree of depth of coal pile, avoids the inside escape gas condensation of coal pile, during gaseous composition detecting element externally arranges the environment in, and through the cooling of outer connecting rod with the high-temperature gas that escapes, avoid gas sensor damage. The length of the external connecting rod can enable the escaping gas to be cooled to the temperature endured by the gas sensor. Two ends of the outer connecting rod are respectively coaxially welded with the temperature and humidity screw caps and the gas component screw caps, the two screw caps are respectively provided with holes, and the hole diameter is matched with the inner diameter of the outer connecting rod.
Because the gas quantity in the coal pile is small, the coal pile is not suitable for being pumped by an external power source. Based on the trapezoid shape of the coal pile, when the device measures the gas components in the coal pile, the temperature difference (gas density difference) between the inside and the outside of the coal pile is utilized to enable the gas in the coal pile to naturally flow outwards, and the device needs to be vertically or obliquely downwards inserted into the coal pile when in use.
The invention has the following beneficial effects:
the device can quickly and accurately measure the internal temperature of the coal pile and simultaneously detect the internal atmosphere including O2CO, temperature, humidity and the like, and provides more abundant information for accurately judging or researching the heat loss and the spontaneous combustion tendency in the coal pile.
Drawings
Fig. 1 is a schematic diagram of the structural principle of the present invention.
FIG. 2 is a schematic view of an insertion end and a gas sampling unit.
Fig. 3 is a schematic view of a gas temperature and humidity detecting unit.
Fig. 4 is a schematic view of a gas component detecting unit.
In the figure: 1. a measuring rod; 2. the insertion end and the gas sampling unit; 3. a temperature sensor; 4. a gas temperature and humidity detection unit; 5. a gas component detection unit; 6. an outer connecting rod; 2-1, fastening a screw by using a steel ball; 2-2, cylindrical lengthened nuts; 2-3, positioning points; 2-4, a vent groove; 4-1, a temperature and humidity sensor; 4-2, connecting temperature and humidity; 4-3, temperature and humidity cylinder body; 4-4, temperature and humidity screw covers; 5-1, a gas composition sensor; 5-2, connecting gas components; 5-3, a gas component cylinder; 5-4, gas component screw cap; 5-5, a wiring terminal; 5-6, a junction box; 5-7, thin nuts; 5-8, gas escape holes.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the device for measuring the internal temperature and atmosphere of the coal pile comprises a measuring rod 1, a gas sampling unit 2, a temperature sensor 3, a gas temperature and humidity detection unit 4, a gas component detection unit 5 and an external connecting rod 6.
The measuring rod 1 is a stainless steel pipe, so that the measuring rod can be conveniently inserted into the deep part of a coal pile and can keep good rigidity, the stainless steel pipe with the outer diameter of 10mm-20mm is adopted, the wall thickness is more than 1mm, the length of the measuring rod 1 is determined according to the depth of a temperature point to be measured, and the length of the stainless steel pipe with the outer diameter of 16mm and the wall thickness of 2mm is adopted in the application of the invention.
The gas acquisition unit 2 comprises a steel ball fastening screw 2-1, a cylindrical lengthened nut 2-2, a positioning point 2-3 and a vent groove 2-4.
The steel ball set screw 2-1 is a standard component and is arranged at the tail end of the insertion end of the measuring device, so that the measuring device can be conveniently and smoothly inserted into the coal pile.
The cylindrical lengthened nut 2-2 is a standard component and is used for installing the steel ball fastening screw 2-1, the type of an inner thread of the nut is matched with that of the steel ball fastening screw 2-1, the outer diameter of the nut is slightly smaller than that of the measuring rod 1, and the nut is welded at the end part of the measuring rod 1.
The positioning points 2-3 are welding points, and 1-2 welding points are welded by electric welding points on the inner wire of the cylindrical lengthened nut 2-2 at the welding position of the cylindrical lengthened nut 2-2 and the measuring rod 1, so that the steel ball fastening screw 2-1 is prevented from being screwed in or automatically screwed into the measuring rod 1 when being stressed.
The number of the vent grooves 2-4 is 2-4, and the vent grooves are open grooves cut at the end part of the measuring rod 1 along the length direction and are used for enabling gas at a measuring point inside the coal pile to enter the measuring rod 1. The length of the vent groove is 3cm-10cm, and the width of the vent groove is 2mm-4mm, so that the vent groove 2-4 is prevented from being completely blocked by coal particles, and the coal particles entering the measuring rod 1 are convenient to clean.
The temperature sensor 3 is used for measuring the temperature at the measuring point inside the coal pile and adopts a thermocouple or a thermal resistor. The temperature sensing point of the temperature sensor 3 is not reached along the length direction of the measuring rod but is close to the tail end of the measuring rod 1. In order to avoid temperature deviation caused by heat conduction of the steel pipe, a temperature sensing point of the temperature sensor 3 is suspended in the measuring rod 1 and cannot be in contact with the wall of the steel pipe, a simple method is to tie a lead close to the temperature sensing point, and the temperature sensing point is suspended in the middle of the lead tie.
The gas temperature and humidity detection unit 4 comprises a temperature and humidity sensor 4-1, a temperature and humidity wiring 4-2, a temperature and humidity cylinder 4-3 and a temperature and humidity screw cap 4-4.
And the temperature and humidity sensor 4-1 is used for measuring the temperature and the humidity of gas escaping from the coal pile through the vent groove.
The temperature and humidity wiring 4-2 is a power supply and signal connection line of the temperature and humidity sensor 4-1.
The temperature and humidity cylinder 4-3 is a section of stainless steel tube, the inner diameter of the temperature and humidity cylinder is suitable for being filled with the temperature and humidity sensor 4-1, and an air circulation space is provided, and a standard part can be selected.
The temperature and humidity screw cover 4-4 adopts a standard component matched with the temperature and humidity cylinder body, and a 1-inch stainless steel pipe cap is adopted in the application of the temperature and humidity screw cover. And a temperature and humidity screw cover 4-4 at one end is provided with a hole and is coaxially welded with the measuring rod 1, and the hole diameter is matched with the inner diameter of the measuring rod 1. When the temperature and humidity screw cap 4-4 is connected with the temperature and humidity barrel 4-3, a gasket or a raw material tape is needed for sealing.
The gas component detection unit 5 comprises a gas component sensor 5-1, a gas component wiring 5-2, a gas component cylinder 5-3, a gas component screw cap 5-4, a wiring terminal 5-5, a wiring box 5-6, a thin nut 5-7 and a gas escape hole 5-8.
The gas component sensor 5-1 can be an electrochemical gas sensor, the type and the number of the sensors are determined according to the components of the gas to be detected, and O is arranged in the gas component sensor2And a CO sensor.
The gas component connection line 5-2 is a power supply and signal connection line of the gas component sensor 5-1.
The gas component cylinder 5-3 is a section of stainless steel tube, the inner diameter of which is suitable for being filled with the gas component sensor 5-1 and is provided with a gas circulation space, and a standard part can be selected, for example, a 1 inch external thread stainless steel tube with the length of 10cm is adopted in the application of the invention.
The gas component screw cap 5-4 adopts a standard component matched with the gas component cylinder 5-3, and a 1 inch stainless steel pipe cap is adopted in the application of the invention. The gas component screw cap 5-4 and the gas component cylinder 5-3 need to be sealed by a gasket or a raw material tape when being connected.
And the wiring terminal 5-5 is used for summarizing wiring of the temperature sensor 3, the temperature and humidity sensor 4-1 and the gas composition sensor 5-1, and is convenient to be in butt joint with a power line and a signal line of an external measuring instrument.
And the junction box 5-6 is used for mounting the wiring terminal 5-5.
The thin nut 5-7 is a standard component and is used for clamping and installing the junction box 5-6 on the gas component cylinder 5-3, and the model of the thin nut is matched with that of the gas component cylinder 5-3.
The gas escape hole 5-8 is formed by forming one or more round holes on the junction box 5-6 and is used for natural flowing escape of gas in the coal pile.
The outer connecting rod 6 is used for connecting the gas temperature and humidity detection unit 4 and the gas component detection unit 5, and aims to separate temperature and humidity detection from gas component detection, during measurement, the gas temperature and humidity detection unit 4 is inserted into a coal pile to a certain depth to avoid gas escaping from the coal pile to be condensed, the gas component detection unit 5 is arranged outside the environment, and the escaping high-temperature gas is cooled through the outer connecting rod 6 to avoid damage to the gas sensor 5-1. The length of the outer connecting rod 6 can enable the escaping gas to be cooled to the temperature endured by the gas sensor 5-1, and a stainless steel pipe with the length of 30cm, the outer diameter of 16mm and the wall thickness of 2mm is adopted in the application of the invention. Two ends of the outer connecting rod 6 are respectively coaxially welded with a temperature and humidity screw cap 4-4 and a gas component screw cap 5-4, the two screw caps are respectively provided with holes, and the hole diameter is matched with the inner diameter of the outer connecting rod 6.
Because the gas quantity in the coal pile is small, the coal pile is not suitable for being pumped by an external power source. Based on the trapezoid shape of the coal pile, when the device measures the gas components in the coal pile, the temperature difference (gas density difference) between the inside and the outside of the coal pile is utilized to enable the gas in the coal pile to naturally flow outwards, and the device needs to be vertically or obliquely downwards inserted into the coal pile when in use.
Claims (10)
1. The device for measuring the internal temperature and atmosphere of the coal pile is characterized by comprising a measuring rod, a gas sampling unit, a temperature sensor, a gas temperature and humidity detection unit, a gas component detection unit and an external connecting rod;
the one end of measuring staff is connected gaseous sampling unit, and temperature sensor is unsettled in the measuring staff inside and not with the contact of measuring staff inner wall, is located the one end that the measuring staff connects gaseous sampling unit, and gaseous temperature and humidity detecting unit is connected to the other end of measuring staff, and gaseous temperature and humidity detecting unit passes through outer connecting rod and connects gaseous composition detecting element.
2. The apparatus according to claim 1, wherein the measuring rod is made of stainless steel and is easily inserted into the coal pile and maintains a good rigidity; preferably, the stainless steel pipe with the outer diameter of 10mm-20mm has the wall thickness of more than 1mm, and the length of the measuring rod is determined according to the depth of a temperature point required to be measured.
3. The coal pile internal temperature and atmosphere measuring device according to claim 1, wherein the gas collecting unit comprises a steel ball set screw, a cylindrical lengthened nut, a positioning point and a vent groove;
the steel ball set screw is a standard component and is arranged at the tail end of the insertion end of the measuring device, so that the measuring device can be conveniently and smoothly inserted into the coal pile;
the cylindrical lengthened nut is a standard component and is used for installing the steel ball fastening screw, the type of an internal thread of the cylindrical lengthened nut is matched with that of the steel ball fastening screw, and the outer diameter of the cylindrical lengthened nut is slightly smaller than that of the measuring rod and is welded at the end part of the measuring rod;
the positioning points are welding points, 1-2 welding points are spot-welded on the inner wire of the cylindrical lengthened nut at the welding position of the cylindrical lengthened nut and the measuring rod by electric welding, and the welding points are used for preventing the steel ball fastening screw from being screwed in or automatically screwed in the measuring rod when stressed;
the ventilation grooves are open grooves cut at the end part of the measuring rod along the length direction, the number of the ventilation grooves is 2-4, and the ventilation grooves are used for enabling gas at measuring points in the coal pile to enter the measuring rod, so that the temperature sensor can rapidly measure the temperature at the corresponding measuring points on one hand, and the gas is used for leading out measured gas components from the measuring rod on the other hand; the length of the vent groove is 3cm-10cm, and the width of the vent groove is 2mm-4mm, so that the vent groove is prevented from being completely blocked by coal particles, and the coal particles entering the measuring rod are convenient to clean.
4. The apparatus according to claim 1, wherein the temperature sensor is used for measuring the temperature at a measuring point inside the coal pile, and is a thermocouple or a thermal resistor; the temperature sensing point of the temperature sensor is not reached but close to the tail end of the measuring rod along the length direction of the measuring rod; in order to avoid temperature deviation caused by heat conduction of the steel pipe, a temperature sensing point of the temperature sensor is suspended in the measuring rod and cannot be in contact with the wall of the steel pipe, a simple method is to tie a lead close to the temperature sensing point, and the temperature sensing point is suspended in the middle of the lead tie;
the gas temperature and humidity detection unit comprises a temperature and humidity sensor, a temperature and humidity wiring, a temperature and humidity cylinder and a temperature and humidity screw cover;
the temperature and humidity sensor is used for measuring the temperature and humidity of gas escaping from the coal pile through the vent groove;
the temperature and humidity wiring is a power supply and signal connection line of the temperature and humidity sensor;
the temperature and humidity cylinder is a section of stainless steel pipe, the inner diameter of the temperature and humidity cylinder is suitable for being filled with a temperature and humidity sensor and a gas circulation space, and a standard part is adopted;
the temperature and humidity screw cover adopts a standard component matched with the temperature and humidity cylinder body; one end of the temperature and humidity screw cap is provided with a hole and is coaxially welded with the measuring rod, and the aperture is matched with the inner diameter of the measuring rod; when the temperature and humidity screw cover is connected with the temperature and humidity cylinder body, a gasket or a raw material belt is adopted for sealing.
5. The apparatus according to claim 1, wherein the gas component detecting unit includes a gas component sensor, a gas component wire, a gas component cylinder, a gas component screw cap, a terminal block, a terminal box, a thin nut, and a gas escape hole;
the gas component sensor adopts an electrochemical gas sensor, and the type and the number of the sensors are determined according to the components of gas to be detected;
the gas component wiring is a power supply and signal connection wire of the gas component sensor;
the gas component cylinder is a section of stainless steel pipe, the inner diameter of the cylinder is suitable for being filled with a gas component sensor and having a gas circulation space, and a standard part can be selected;
the gas component screw cap adopts a standard component matched with the gas component cylinder; when the gas component screw cap is connected with the gas component cylinder, a gasket or a raw material belt is needed for sealing;
the connecting terminal is used for collecting the connecting wires of the temperature sensor, the temperature and humidity sensor and the gas composition sensor, and is convenient to be in butt joint with a power line and a signal line of an external measuring instrument;
the junction box is used for mounting a wiring terminal;
the thin nut is a standard component, is used for clamping and installing the junction box on the gas component cylinder, and can be matched with the gas component cylinder in type;
the gas escape hole is formed by forming one or more round holes on the junction box and is used for natural flowing escape of gas in the coal pile.
6. The device for measuring the internal temperature and atmosphere of the coal pile according to claim 1, wherein the external connecting rod is used for connecting the gas temperature and humidity detection unit and the gas component detection unit, and aims to separate temperature and humidity detection from gas component detection; the length of the external connecting rod can enable the escaping gas to be cooled to the temperature endured by the gas sensor; two ends of the outer connecting rod are respectively coaxially welded with the temperature and humidity screw caps and the gas component screw caps, the two screw caps are respectively provided with holes, and the hole diameter is matched with the inner diameter of the outer connecting rod.
7. The apparatus according to claim 2, wherein the measuring rod is a stainless steel pipe having a length of 2m, an outer diameter of 16mm, and a wall thickness of 2 mm.
8. The apparatus according to claim 4, wherein the temperature and humidity measuring cylinder is a stainless steel tube having a length of 5cm and 1 inch outer wires, and the temperature and humidity screw cap is a stainless steel tube cap having a length of 1 inch.
9. The apparatus for measuring the temperature and atmosphere inside a coal pile according to claim 5, wherein the gas composition sensor uses O2And the gas component cylinder body adopts a 1-inch external-thread stainless steel tube with the length of 10cm, and the gas component screw cap adopts a 1-inch stainless steel tube cap.
10. The apparatus according to claim 6, wherein the outer connecting rod is a stainless steel pipe having a length of 30cm, an outer diameter of 16mm, and a wall thickness of 2 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911400752.6A CN111044104A (en) | 2019-12-30 | 2019-12-30 | Device for measuring internal temperature and atmosphere of coal pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911400752.6A CN111044104A (en) | 2019-12-30 | 2019-12-30 | Device for measuring internal temperature and atmosphere of coal pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780813A (en) * | 2020-08-12 | 2020-10-16 | 杭州鸿程科技有限公司 | Prediction type condensation monitoring method and device |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780813A (en) * | 2020-08-12 | 2020-10-16 | 杭州鸿程科技有限公司 | Prediction type condensation monitoring method and device |
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