CN114894558A - High-temperature explosion-proof sampling probe - Google Patents
High-temperature explosion-proof sampling probe Download PDFInfo
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- CN114894558A CN114894558A CN202210807596.0A CN202210807596A CN114894558A CN 114894558 A CN114894558 A CN 114894558A CN 202210807596 A CN202210807596 A CN 202210807596A CN 114894558 A CN114894558 A CN 114894558A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
- G01N2001/2261—Sampling from a flowing stream of gas in a stack or chimney preventing condensation (heating lines)
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a high-temperature explosion-proof sampling probe, and belongs to the technical field of flue gas sampling instruments. The probe comprises a heat-insulating shell, a filter core shaft, a heat-conducting aluminum cylinder, a heating module, an explosion-proof electric box, a mounting bracket, a fixing flange and the like, wherein the heating module is tightly attached to the heat-conducting aluminum cylinder, so that the heat-conducting area of the device is effectively increased, meanwhile, the heating temperature of the probe is accurately monitored by adopting a threaded platinum resistor, and the heating module is convenient to mount and maintain; the high-temperature protection circuit in the flameproof electric box adopts a mechanical relay to replace a high-temperature fuse, the defect that a traditional probe can only be used once in an over-temperature state is overcome, the high-temperature protection circuit conducts high-temperature protection before the probe exceeds the limited temperature of an explosion-proof area to cut off power supply of a heating module, and the reliability of the device is improved. The high-temperature explosion-proof sampling probe has the advantages of low cost, high reliability and convenience in installation and maintenance in practical application, and has good application prospect.
Description
Technical Field
The invention relates to a high-temperature explosion-proof sampling probe, belongs to the technical field of instruments and meters, and particularly relates to the field of flue gas sampling instruments and meters.
Background
The fixed pollution source gas sampling is widely applied to industries such as electric power, chemical engineering, steel and the like, and has important application requirements in scenes such as air pollution research, environment monitoring, gas purity analysis, process monitoring, exhaust gas analysis, petroleum exploration geological logging process monitoring and the like.
When the probe is adopted to sample the flue gas in real time in an explosion-proof place, the temperature of the probe needs to be ensured not to be too low so as to prevent the flue gas from being distorted due to condensation; meanwhile, the temperature also needs to be controlled not to be too high, and the temperature can not exceed the temperature limit value of the explosion-proof area under any condition. The heating part of the traditional high-temperature explosion-proof sampling probe mostly adopts a constant-power heating band, a self-temperature-limiting heat tracing band and other modes, and an electric heating band needs to be wound on the probe, so that the installation and the maintenance are inconvenient; when the self-temperature-limiting heat tracing band is used, the probe is easily influenced by the ambient temperature and a heat preservation mode, and the phenomenon of large temperature fluctuation exists; and the temperature upper limit of the constant-power heat tracing band and the self-limiting temperature heat tracing band is lower, so that the heating temperature range of the probe is narrower. In addition, the traditional high-temperature explosion-proof sampling probe almost has no high-temperature protection function, and the explosion-proof probe with the high-temperature protection function is protected by a temperature fuse, so that the high-temperature explosion-proof sampling probe has the problem of one-time use and cannot intervene in protection in advance for high-temperature conditions.
Among the prior art, utility model CN 208443613U discloses an explosion-proof type sampling probe, including welded flange, sampling tube, valve, flame proof terminal box, heater, filter flange pipe, flame proof casing, filter core and end cover flange, the heating interval of its heater is 100 + 150 ℃, and the heating interval is narrower, and explosion-proof probe does not have the high temperature heat preservation function in addition, and explosion-proof sampling probe has the inconvenient, the narrower, the incomplete shortcoming of high temperature protection function of heating temperature interval of installation maintenance. The utility model CN 208860648U discloses a gas sampling probe, which comprises a sampling pipe and a sample gas processing pipeline, wherein a heater is arranged inside the probe in the design, so that the problem of inconvenient installation and maintenance exists; utility model patent CN 212483062U discloses an explosion-proof sampling device of light and handy type of internal heating, and this application includes the flue and installs the sampling device main part in the outside one side of flue, and the device adopts the heating methods of internal heating, and inside the heater was in the probe, the installation was maintained inconveniently.
Disclosure of Invention
Technical problem to be solved by the invention
The invention provides a high-temperature explosion-proof sampling probe, aiming at the problems of inconvenient installation and maintenance, narrow probe heating temperature interval, imperfect high-temperature protection function and the like of the existing sampling probe.
Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the utility model provides an explosion-proof sampling probe of high temperature, including heat preservation shell, the filter core axle, a heat conduction aluminium section of thick bamboo, heating module, the flame proof electric box, a mounting bracket, mounting flange, the filter core axle is installed inside a heat conduction aluminium section of thick bamboo, heating module laminates in a heat conduction aluminium section of thick bamboo surface, mounting bracket and mounting flange are connected, the flame proof electric box is installed on mounting bracket and is connected with heating module, be equipped with the high temperature protection circuit in the flame proof electric box, the temperature of locating at the probe carries out high temperature protection to the probe before surpassing the explosion-proof regional limited temperature, heat preservation shell covers in a heat conduction aluminium section of thick bamboo and heating module outside.
Further, the heating module comprises a heating rod, a heating aluminum block and a threaded platinum resistor, the heating aluminum block is attached to the surface of the heat-conducting aluminum cylinder, one end of the heating rod is embedded into the heating aluminum block, the other end of the heating rod is connected with the explosion-proof electric box, and the threaded platinum resistor is tightly attached to the heating rod to monitor the temperature of the heating rod.
Furthermore, the high-temperature protection circuit comprises a temperature controller, a mechanical relay and a solid-state relay, wherein the temperature controller is respectively connected with the solid-state relay and the mechanical relay, the mechanical relay is connected with the heating rod, and the temperature controller controls the mechanical relay and the solid-state relay to supply power to the heating rod.
Furthermore, the mounting bracket is of a plate type structure and is connected with the fixed flange through a U-shaped groove bolt with an adjustable interval.
Further, the heating rod is "L" shape.
Advantageous effects
According to the probe, the heating rod is attached to the heating aluminum block to form the heating module, the heating module is only attached to the heat-conducting aluminum cylinder during installation, the heating module is directly replaced during maintenance, and the probe is more convenient to install and maintain compared with the existing probe;
the heating module adopts the high-power heating rod as a probe heating element, and has the advantages of adjustable temperature and wide heating range;
the mechanical relay is adopted to replace the traditional high-temperature fuse, the problem that the traditional probe is used at one time in an over-temperature state is solved, the mechanical relay and the temperature controller are used in a matched mode, the probe is protected at high temperature in advance before the temperature of the probe exceeds the limited temperature of an explosion-proof area, and the reliability of the probe is improved.
Drawings
FIG. 1 is a schematic view of the whole structure of the high-temperature explosion-proof sampling probe of the present invention;
FIG. 2 is a top view of the probe of the present invention;
FIG. 3 is a schematic view of a heating module according to the present invention;
FIG. 4 is a bottom view of the tank mounting bracket structure of the present invention;
FIG. 5 is a schematic diagram of the connection relationship of the high temperature protection circuit of the present invention;
the reference numerals in the figures illustrate: 1-a heat preservation shell, 2-a filter core shaft, 3-a heating aluminum block, 4-a heat conduction aluminum cylinder, 5-a heating rod, 6-an explosion-proof electric box, 7-a threaded platinum resistor, 8-a fixed flange, 9-a mounting bracket, 10-a mechanical relay, 11-a solid-state relay and 12-a temperature controller.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
Fig. 1 and fig. 2 are a schematic structural diagram and a top view of the high-temperature explosion-proof sampling probe of the invention, the probe mainly comprises a heat-insulating shell 1, a filter core shaft 2, a heat-conducting aluminum cylinder 4, a heating module, an explosion-proof electric box 6, a fixed flange 8 and a mounting bracket 9, the heat-conducting aluminum cylinder 4 is mounted outside the filter core shaft 2, and a thicker aluminum cylinder is adopted to wrap a sampling part of the probe, so as to ensure the heating uniformity of the sampling part of the probe; the heating module is attached to the surface of the heat-conducting aluminum cylinder 4, and an aluminum block with a large area is used as a heat-conducting element to fully conduct heat generated by the heating module to the heat-conducting aluminum cylinder 4; the protection casing 1 covers a heat conduction aluminum cylinder and protects the device with the heating module, and keeps warm when the probe is heated, the heat preservation casing adopts rock wool and aluminum foil as heat preservation material, guarantees the heat preservation effect of probe, and adopts the fixed mounting means of buckle, easy to assemble and dismantlement. Filter core axle 2 is installed and is used for fixed filter core in 4 inside heat conduction aluminium section of thick bamboo, and the high accuracy pottery filter core is adopted to this embodiment, and the filter core fully filters sampling gas to adopt the rotatory sealed mode of screw thread, easy to assemble and maintenance.
The flameproof electric box 6 is installed on the mounting bracket 9 and is connected with the heating module, this embodiment adopts Ex d II C T6 Gb type flameproof box, has higher explosion-proof grade, can use in wider occasion, the flameproof electric box is inside to be equipped with the high temperature protection circuit, adopt mechanical relay to replace original high temperature fuse, the shortcoming that traditional probe can only be used once only under the excess temperature state has been improved, cooperation through mechanical relay and temperature controller is used, before the probe surpasses the regional limited temperature of explosion-proof, carry out high temperature protection in advance to the probe, increase the reliability of device.
Fig. 3 is a schematic structural diagram of the heating module of the present invention, the heating module is composed of a heating rod 5, a heating aluminum block 3, and a threaded platinum resistor 7, the heating rod 5 is embedded in the heating aluminum block in an L shape, and the high-power heating rod is used as a probe heating element, which has the advantages of adjustable temperature and wide heating range, when the device works, the flameproof electric box 6 supplies power to the heating rod 5, the heating rod 5 heats the heating aluminum block 3, the heat conduction area of the heating rod is increased, and the threaded platinum resistor 7 adopts a temperature measurement mode clinging to the heating rod, so as to accurately monitor the temperature of the heating rod. When the equipment is installed, the integrated heating module is directly attached to the heat-conducting aluminum cylinder, and the fixing screw is screwed down; in the aspect of maintenance and replacement, the original heating module is detached and then replaced by the integrated heating module, and the installation and maintenance are very convenient.
The probe during operation is detected the probe environment by flame proof electric box 6, and when the test probe temperature was low excessively, control flame proof electric box 6 supplied power for heating rod 5, and heating rod 5 heats through heating aluminium pig 3 with heat conduction to heating aluminium section of thick bamboo 4, heats the probe, and heat preservation casing 1 guarantees that the temperature of probe maintains at the high temperature state. When the temperature of the probe is too high, the high-temperature protection circuit in the flameproof electric box 6 controls the device to be powered off, and the probe is stopped from being heated.
FIG. 4 is a structural bottom view of the mounting bracket 9 of the flameproof electrical box of the present invention, the mounting bracket 9 is of a plate type structure, and the flameproof electrical box 6 is fixed on the mounting bracket through bolt connection; the mounting bracket 9 is connected with the fixed flange 8 through a bolt, and a bolt mounting hole adopts a U-shaped groove design, so that the distance between the mounting bracket and the fixed flange can be adjusted; when the probe is used, the fixing flange 8 is fixedly connected with a sampling field flange to realize the fixation of the probe, and the round hole in the middle of the fixing flange is used for passing through a probe.
Fig. 5 is a schematic diagram of a high-temperature protection circuit of the invention, the high-temperature protection circuit is installed in an explosion-proof electrical box 6, when the high-temperature protection circuit works normally, a temperature controller 12 controls a mechanical relay 10 and a solid-state relay 11 to supply power to a heating rod 5, the solid-state relay 11 can be switched on and off under high frequency, and PID control of the temperature of the heating rod 5 is realized through the cooperation of the temperature controller and the solid-state relay 11.
When the temperature of the heating rod 5 exceeds a set limit value, the high-temperature protection circuit starts to work, the mechanical relay 10 and the temperature controller 12 are used in a matched mode, high-temperature protection is conducted before the probe exceeds the limited temperature of an explosion-proof area by means of high safety of the mechanical relay 10, and power supply of the heating rod 5 is cut off; when the solid-state relay 11 is damaged by short circuit, the mechanical relay 10 can also perform high-temperature protection, cut off the power supply of the heating rod 5 and increase the reliability of the probe.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (5)
1. The utility model provides an explosion-proof sampling probe of high temperature, its characterized in that comprises heat preservation casing, filter element axle, heat conduction aluminium section of thick bamboo, heating module, flame proof electric box, installing support, mounting flange, the filter element axle install in inside the heat conduction aluminium section of thick bamboo, heating module laminate in heat conduction aluminium section of thick bamboo surface, the installing support with mounting flange connects, flame proof electric box install in on the installing support and with heating module connects, is equipped with the high temperature protection circuit in the flame proof electric box, carries out high temperature protection to the probe before the temperature that the probe was located surpasss the explosion-proof regional limited temperature, heat preservation casing cover in heat conduction aluminium section of thick bamboo and heating module are outside.
2. The high-temperature explosion-proof sampling probe according to claim 1, wherein the heating module comprises a heating rod, a heating aluminum block and a threaded platinum resistor, the heating aluminum block is attached to the surface of the heat-conducting aluminum cylinder, one end of the heating rod is embedded into the heating aluminum block, the other end of the heating rod is connected with the explosion-proof electrical box, and the threaded platinum resistor is attached to the heating rod.
3. The high-temperature explosion-proof sampling probe according to claim 1, wherein the high-temperature protection circuit comprises a temperature controller, a mechanical relay and a solid-state relay, the temperature controller is respectively connected with the solid-state relay and the mechanical relay, the mechanical relay is connected with the heating rod, and the temperature controller controls the mechanical relay and the solid-state relay to supply power to the heating rod.
4. A high temperature explosion-proof sampling probe according to claim 1, wherein the mounting bracket is a plate structure, and the mounting bracket is connected with the fixed flange through a U-shaped groove bolt with adjustable spacing.
5. A high temperature explosion-proof sampling probe according to claim 2, wherein said heater rod is "L" shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210807596.0A CN114894558A (en) | 2022-07-11 | 2022-07-11 | High-temperature explosion-proof sampling probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210807596.0A CN114894558A (en) | 2022-07-11 | 2022-07-11 | High-temperature explosion-proof sampling probe |
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| Publication Number | Publication Date |
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| CN114894558A true CN114894558A (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210807596.0A Pending CN114894558A (en) | 2022-07-11 | 2022-07-11 | High-temperature explosion-proof sampling probe |
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Citations (14)
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Application publication date: 20220812 |
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