CN107238548B - Sampling and weighing integrated beta-ray smoke mass weighing instrument - Google Patents
Sampling and weighing integrated beta-ray smoke mass weighing instrument Download PDFInfo
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- CN107238548B CN107238548B CN201710706572.5A CN201710706572A CN107238548B CN 107238548 B CN107238548 B CN 107238548B CN 201710706572 A CN201710706572 A CN 201710706572A CN 107238548 B CN107238548 B CN 107238548B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The sampling and weighing integrated beta-ray smoke mass weighing instrument comprises a sampling head and a main machine box, wherein the sampling head is connected with the main machine box through a heat tracing hose; the main case is internally fixed with a beta-ray detection module and a rotatable turntable, and a filter membrane clamp mounting hole is formed in the turntable; a sampling gas circuit formed by pressing the filter membrane clamp mounting holes by the upper sealing cover and the lower sealing cover is arranged in the main case; an air inlet three-way valve is arranged on the air inlet pipe, a third joint of the air inlet three-way valve is connected with the high-efficiency filter, and external air can be filtered and heated and then passes through the filter membrane, so that the filter membrane is dried. The weighing instrument realizes the connection of the sampling head and the mainframe box through the quick connecting mechanism, integrates sampling and weighing, and is suitable for sampling of various flues. The filter membrane clamping and placing device, the sample collecting device, the drying device and the weighing device are integrated through the rotary disc, so that the structure is compact, and the portability is good. The self-contained back-blowing device cleans the sampling pipeline, reduces the influence of deposited particles on subsequent sampling, and improves the sampling precision.
Description
Technical Field
The invention belongs to the field of smoke concentration monitoring, and particularly relates to a sampling and weighing integrated beta-ray smoke mass weighing instrument.
Background
The environmental pollution problem caused by pollution sources such as industrial boilers, power plant boilers, industrial kilns and the like is very serious, and the pollution sources are intensively studied and controlled in various countries in the world, so that the concentration of the granular smoke discharged by the pollution sources needs to be monitored.
The current common monitoring methods include a light transmission method, a laser back scattering method, a charge method, a beta-ray absorption method, a filtering weighing method and the like. The basic principle of the filtering and weighing method is that a certain volume of dust-containing flue gas passes through a filter cylinder with known weight, dust particles in the flue gas are retained, and the dust concentration is calculated according to the weight difference and the sampling volume of the filter cylinder before and after sampling. Because the filtering and weighing method has high accuracy and good precision, many foreign countries adopt the method as a standard method, and China also adopts the method as a standard for identifying other analysis methods. However, the filtering and weighing method needs to sample smoke dust through a filter membrane, then dry the smoke dust filter material, and finally weigh and calculate the detection results of smoke dust concentration and smoke emission. The weighing devices required for the load bearing are usually large in size and are required to be placed in a clean analysis chamber for operation. The distance between the sampling ground and the analysis room is usually long, and errors are easily caused by long transportation process; the period from sampling to sampling is long, and the timely evaluation of environmental protection monitoring stations at all levels cannot be met.
The principle of the beta ray absorption method is as follows: when beta rays emitted by a beta source with constant intensity pass through the medium, the beta particles collide with electrons in the medium to lose energy and are absorbed. Under low energy conditions, the degree of absorption depends on the quality of the medium, irrespective of the particle size, composition, color, dispersion state, etc. of the dust particles. The beta rays pass through the clean filter paper (the dust collection sample is not collected) and the dust collection filter paper (the same filter paper) sequentially, and the dust concentration in the environment is obtained according to the difference of the absorbed quantity of the beta rays. The beta-ray absorption method is not affected by the factors of dust type, granularity, dispersity, shape, color, luster and the like; the method can reduce the processing time of the sample and the probability of pollution, does not bring personal errors and error accumulation, does not need to be calibrated and zeroed frequently, and is a more accurate method for indirectly measuring the dust concentration.
At present, a weighing instrument adopting a beta-ray absorption method is usually separated from a sampling instrument, a sampled filter membrane is required to be transferred into the weighing instrument for weighing, the process is complex, and impurities are easy to bring. And the weighing unit and the drying unit are relatively independent, the structure is not compact, and the portability is poor. In addition, the drying process adopts a heating radiation drying mode, and the drying speed is low. After long-term use, the inner wall of the pipeline of the sampling head can be stuck with more or less particulate matters, so that the detection result is affected.
Disclosure of Invention
Aiming at the technical problems of the existing weighing instrument adopting the beta-ray absorption method, the invention provides the beta-ray smoke mass weighing instrument which has a compact structure, integrates a sampling tube, drying and weighing, and has accurate detection result.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the integrated beta-ray smoke mass weighing instrument comprises a sampling head and a main machine box, wherein the sampling head is connected with the main machine box through a heat tracing hose; the main case is internally fixed with a beta-ray detection module and a rotatable turntable, and a filter membrane clamp mounting hole is formed in the turntable; an upper sealing cover and a lower sealing cover are also arranged in the main case, the upper sealing cover is connected to a smoke tube in the sampling head through an air inlet tube, the lower sealing cover is connected to the outside of the case through an air outlet tube, and a sampling air passage is formed when the upper sealing cover and the lower sealing cover compress the mounting hole of the filter membrane clamp; an air inlet three-way valve is arranged on the air inlet pipe, a third joint of the air inlet three-way valve is connected with the efficient filter, and a filter membrane in the rotary table rotary mounting hole can be positioned between the upper sealing cover and the lower sealing cover and at the beta-ray detection module.
Preferably, the air outlet pipe is provided with an air outlet three-way valve, and a third joint of the air outlet three-way valve is connected with the back blower.
Preferably, the air inlet pipe, the upper sealing cover and the lower sealing cover are all coated with electric heating belts.
Preferably, the lower sealing cover is connected with an eccentric wheel, a compression spring is arranged between the lower sealing cover and the main case, and the eccentric wheel is driven by an eccentric wheel motor to rotate so as to drive the lower sealing cover to lift.
Preferably, the side wall of the main cabinet is provided with a taking and placing opening, one of the filter membrane clamp mounting holes stretches out of the taking and placing opening when the turntable rotates, and the taking and placing opening is provided with a baffle door capable of opening and closing.
Preferably, the main case is provided with a sliding rail and a door opening and closing motor, the baffle door is arranged on the sliding rail through a sliding block, a motor shaft is connected with a crank, the other end of the crank is hinged with a connecting rod, and the connecting rod is hinged with the sliding block, so that the electric switch of the baffle door is realized.
Preferably, the turntable is provided with three filter membrane clamp mounting holes.
Preferably, the main case is provided with an upper flip cover, the bottom surface of the upper flip cover is provided with a display screen, and the main case is also provided with control buttons and an input keyboard.
Preferably, a singlechip is arranged in the main case, and the input end of the singlechip is connected with a beta-ray detection module, a sampling head and an input keyboard; the output end is connected with a back blower, a door opening and closing motor and a display screen.
Compared with the prior art, the invention has the advantages and positive effects that:
1. this integral type beta ray smoke and dust quality weighing instrument realizes through quick-operation coupling mechanism that the heat tracing hose of sampling head and mainframe box is connected, will sample with weigh integration, makes equipment be applicable to the sampling of multiple flue.
2. The filter membrane is clamped and placed through the rotary table, the sample collection device, the drying device and the weighing device are integrated, the structure is compact, and the portability is good.
3. The filter membrane is dried and is heated and air-dried simultaneously, and drying efficiency is high.
4. The self-provided back-blowing device cleans the sampling pipeline and improves the sampling precision.
Drawings
FIG. 1 is a schematic view of the overall structure of the weighing cell of the present invention;
FIG. 2 is a schematic diagram of the control relationship of the weighing cell of the present invention;
FIG. 3 is a schematic view of a quick connect mechanism of the weighing apparatus of the present invention;
FIG. 4 is a schematic view of a turntable and a station of the weighing apparatus of the present invention;
FIG. 5 is a schematic view of a turntable and a station of the weighing apparatus of the present invention;
FIG. 6 is a schematic diagram of an electrically operated shutter door opening and closing structure of the weighing apparatus of the present invention;
FIG. 7 is a schematic diagram of the turntable structure of the weighing apparatus of the present invention;
in the above figures: 1. a sampling head; 11. a smoke tube; 111. a tetrafluoro tube; 12. a pitot tube; 13. smoke Wen Xianguan; 14. a protective tube; 15. a heat tracing hose; 151. a heat tracing hose joint; 2. a main chassis; 21. a flip cover is arranged; 22. a display screen; 23. an input keyboard; 24. a taking and placing port; 25. taking and placing a box; 251. a flapper door; 252. a slide rail; 253. a slide block; 254. a crank; 255. a connecting rod; 256. a limit switch; 26. a metal joint; 27. a tetrafluoro pipe joint; 271. a silica gel lining; 272. a thread sleeve; 28. a box body joint; 3. collecting a weighing unit; 31. a bracket; 311. an optoelectronic switch; 32. a turntable motor; 33. a turntable; 331. a mounting hole; 332. a baffle; 34. an upper sealing cover; 35. a lower sealing cover; 36. an air inlet pipe; 361. an air inlet three-way valve; 37. an air outlet pipe; 371. a three-way valve for air outlet; 38. an electric heating belt; 4. a high-efficiency filter; 5. a counter-blowing machine; 6. a beta ray detection module; 61. a beta radiation source; 62. a beta-ray detector; 7. a quick lifting mechanism; 71. a connecting plate; 72. an eccentric wheel; 73. a compression spring; 8. a single chip microcomputer; A. a picking and placing station; B. sampling and drying stations; C. and a weighing station.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the drawings and examples.
Examples: as shown in fig. 1 and 2, the sampling and weighing integrated beta-ray smoke mass weighing instrument comprises a sampling head and a main machine box, wherein a sampling weighing unit for sampling a smoke sample, drying the sample and weighing is arranged in the main machine box. The smoke mass weighing instrument adopts a beta-ray measurement method, integrates a smoke particulate sampling tube, a drying device and a weighing device, has high drying speed and compact equipment structure, and can be matched with the existing smoke sampler for use to rapidly detect smoke concentration.
The sampling head comprises an oil smoke pipe, a standard Pitot tube and a smoke temperature tube, wherein the oil smoke pipe, the standard Pitot tube and the smoke temperature tube are respectively used for collecting oil smoke particles, detecting gas flow and detecting gas temperature, the Pitot tube is connected to a main machine box through two silica gel tubes, the oil smoke tube is connected to an air inlet pipe of a collecting and weighing unit through a tetrafluoro tube (a pipeline with an inner wall coated with polytetrafluoroethylene) with an external heating and heat preservation function, the silica gel tube and the tetrafluoro tube are both arranged in a metal protection tube, and the tail end of the protection tube is connected with the main machine box through a heat tracing hose. The design is effectual has solved the sampling restriction problem that current flue gas particulate matter analyzer sampling head and mainframe rigid connection brought, because the flue height that needs to detect is different, its direction has types such as vertical, level and slope, rigid connection has restricted the length of sampling head, because mainframe's restriction during its sampling, is difficult to accomplish vertical sampling. In addition, when the equipment is transported, the sampling head needs to be detached, otherwise, the occupied space is too large to transport, and the foldable tray can be detached by adopting heat tracing hose connection. As shown in fig. 3, in order to realize the quick connection between the heat tracing hose and the main case, a quick connection mechanism is provided, so that the transportation and the use are convenient. The quick connecting mechanism comprises two metal joints arranged on the outer wall of the box body and used for inserting two silica gel tubes of the pitot tube, the silica gel tubes are soft and can be directly sleeved on the metal joints, and the installation is firm and can be sealed. The tetrafluoro tube is hard and is difficult to be directly sleeved on the metal joint. Therefore, the inner wall of the outer wall of the box body is provided with the tetrafluoro pipe joint with the silica gel lining adhered to the inner wall, the inner wall of the tetrafluoro pipe joint is provided with the internal thread, the threaded sleeve which is tightly propped against the silica gel lining is screwed on the internal thread, the tetrafluoro pipe is inserted into the tetrafluoro pipe joint during installation, and the silica gel lining tightly wraps the tetrafluoro pipe, so that the sealing is realized. The metal joint and the tetrafluoro pipe joint are both arranged in the box joint with threads, and the tail end of the heat tracing hose is provided with the heat tracing hose joint screwed on the box joint.
And an STM32 series singlechip (such as STM32F103VCT 6) for receiving detection elements such as a sensor and a photoelectric switch and controlling the operation of electric devices is arranged in the host case. The upper flip cover is arranged on the main case, a display screen electrically connected with the single chip is arranged on the bottom surface of the upper flip cover, and a control button and an input keyboard are also arranged on the main case and used for inputting instructions.
The collecting and weighing unit comprises a bracket arranged in the main case, a turntable motor is arranged on the bracket, and a sector turntable is arranged on a main shaft of the turntable motor. The turntable motor adopts a servo motor and can drive the turntable to rotate, and the turntable is provided with a mounting hole for placing the filter membrane clamp. The rotary table rotates, and the positions of the filter membranes in the mounting holes correspond to three stations, namely a taking and placing station A, a sampling and drying station B and a weighing station C, and reference is made to FIG. 4.
The side wall of one side of the main machine case is provided with a taking and placing port for taking and placing the filter membrane clamp, namely a taking and placing station. When the turntable rotates to the upper picking and placing station, the filter membrane clamp in the mounting hole extends out of the main case from the picking and placing port. In order to protect the filter membrane clamp from external pollution, a taking and placing box is arranged on the main machine box and covers the taking and placing opening. As shown in fig. 5, in order to facilitate taking and placing, a baffle door for realizing electric opening and closing by adopting a crank connecting rod structure is arranged on the taking and placing box. The support is provided with a sliding rail, and the baffle door is arranged on the sliding rail through a sliding block. The door opening and closing motor is arranged on the bracket, the motor shaft is connected with the crank, the other end of the crank is hinged with the connecting rod, the connecting rod is hinged with the sliding block, the door opening and closing motor is connected with the output port of the singlechip, and the door opening and closing motor and the crank are connected with a 2-structure to realize the left and right sliding of the door opening and closing along the sliding rail, so that the door opening and closing are realized. Limit switches for limiting the opening and closing positions of the baffle door are further arranged on the support and are respectively arranged on two sides of the baffle door. The limit switch is connected with the input port of the singlechip, and when the baffle door is opened to the maximum, the limit switch is triggered, the door opening and closing motor stops rotating, and the same is true when the door is closed. Of course, the motor can drive the gear to rotate, and the gear drives the rack structure arranged on the baffle door to realize the opening and closing of the baffle door.
The sampling and drying station is provided with an upper sealing cover and a lower sealing cover, the upper sealing cover is connected to a smoke dust pipe in the sampling head through an air inlet pipe, the lower sealing cover is connected to an outer interface on the box body through an air outlet pipe, and a sampling air passage is formed when the upper sealing cover and the lower sealing cover compress a filter membrane clamp mounting hole. The external interface can be connected with sampling pumps of other sampling equipment for use to obtain air extraction power. Because the flue gas contains water vapor, in order to prevent the flue gas from entering the main case through the heat tracing hose and then being condensed into liquid drops to influence the detection result, the upper sealing cover and the air inlet pipe connected with the upper sealing cover are both coated with electric heating belts.
The air inlet pipe is also connected with an air inlet three-way valve, the air inlet three-way valve is connected with the air inlet pipe through a drying air pipe except for two connectors, the third connector is connected with the high-efficiency filter, the air inlet three-way valve is an electromagnetic valve connected with the singlechip, and when an air path of the high-efficiency filter is opened, clean air blows through the filter membrane clamp, and the filter membrane on the filter membrane clamp is dried. In order to accelerate the drying speed, the drying air pipe is coated with an electric heating belt. Clean gas filtered by the high-efficiency filter enters the gas path and is heated, hot gas flows through the filter membrane, particles on the filter membrane are quickly dried, and moisture is taken away. Compared with the existing radiation heating, the drying speed is accelerated, and the drying effect is good.
The weighing station is provided with a beta-ray detection module which comprises a beta-ray radiation source and a beta-ray detector, wherein the beta-ray radiation source is arranged on the bracket through a radiation source fixing seat and is positioned above the turntable; the beta-ray detector is arranged on the support and positioned below the turntable, the beta-ray radiation source emits rays to pass through the filter membrane in the mounting hole, the rays are received by the beta-ray detector, the output port of the beta-ray detector is connected with the input port of the singlechip, the detection signals are transmitted to the singlechip, and the singlechip compares the values of the blank filter membrane with the values of the sample filter membrane to calculate out the particulate matter quantity information.
When the rotary table rotates, the lower sealing cover is required to be lowered for a certain distance so that the rotary table rotates, and the lower sealing cover is connected with a quick lifting mechanism. As shown in fig. 6, the quick lifting mechanism comprises a connecting plate connected with the bottom of the lower sealing cover, the upper surface of the connecting plate is abutted against an eccentric wheel, and a compression spring is arranged between the lower sealing cover and the main case to upwards extrude the lower sealing cover so as to be in tight contact with the turntable, so that a sealed gas path is obtained. The eccentric wheel is driven by the eccentric wheel motor to rotate, the surface of the eccentric wheel presses the lower sealing cover, and the lower sealing cover is driven to lift.
For supplementary carousel rotation to corresponding station, the location is accurate, carousel bottom is provided with the separation blade, and every station department is provided with photoelectric switch, and photoelectric switch's output is connected to the input of singlechip, and when photoelectric switch blocked, carousel motor stopped.
As the sampling head and the sampling branch pipeline are longer, more or less particulate matters can be adhered to the inner wall of the pipeline, and the particulate matters can be collected by the filter membrane during re-detection, so that the detection result is affected. In order to avoid the above situation, the air outlet pipe is connected with an air outlet three-way valve, and a third joint of the air outlet three-way valve is connected with a back blower. After the back blower is started, air flow is blown into the air inlet pipe through the air outlet pipe, and then is blown out through the oil fume pipe of the sampling head, so that particulate matters in the pipeline are discharged, and the accurate detection result is ensured.
The use process of the weighing instrument is as follows,
1. and opening the upper flip cover to start the equipment. And the baffle door is slid to clamp the filter membrane into the mounting hole at the taking and placing station.
2. Closing the baffle door, and stopping the rotary table after the rotary table motor drives the rotary table to rotate a certain angle to align with the drying station, wherein the eccentric wheel motor rotates to enable the eccentric wheel to push the drying lower cover to realize the sealing of the drying branch; the air inlet three-way valve closes the sampling air passage, is communicated with the drying air passage, the air outlet three-way valve opens the sampler air passage, closes the back blowing air passage, is externally connected with the sampling pump for exhausting air, and utilizes hot air from the drying air passage to blow the filter membrane.
3. After the filter membrane is dried, the lower sealing cover descends to loosen the filter membrane clamp, the turntable motor drives the turntable to rotate, the filter membrane clamp enters the weighing station, the beta rays are utilized to weigh the blank filter membrane, and the weighing result is transmitted to the singlechip.
4. And after weighing, the turntable motor drives the turntable to rotate, and the filter membrane clamp enters the sampling station. The quick lifting mechanism enables the lower sealing cover to ascend to seal the sampling branch, the air inlet three-way valve is communicated with the sampling air passage, and the sampling pump is used for exhausting air and sampling.
5. After collection is completed, the quick lifting mechanism releases the filter membrane clamp, the turntable motor drives the turntable to rotate, the filter membrane clamp enters an air drying station, and the filter membrane is dried by hot air.
6. And after the filter membrane is air-dried, loosening a filter membrane clamp, driving the turntable to rotate by the turntable motor, enabling the filter membrane clamp to enter a weighing station, and weighing the filter membrane by utilizing beta rays. And 3, comparing the single chip microcomputer with the blank filter membrane quality measured in the step 3, measuring the weight of smoke dust, and displaying on a display screen. The smoke concentration can also be converted by calculating the volume of the sucked gas measured by combining the pitot tube.
7. And after the sampling is finished by clicking, the turntable motor drives the turntable to rotate, the filter membrane clamp is taken out from the door at the position of the position to be placed, and the filter membrane clamp is taken out to finish one-time sampling. The removed filter clamps can be brought back to the analysis chamber for calibration of the comparison test results by a weighing method.
8. After the sampling is finished, back blowing is clicked, the lower sealing cover compresses the filter membrane clamp sealing gas circuit, the air outlet three-way valve is opened to the back blowing machine and the sampling gas circuit, and the fan is started to clean the back blowing pipeline.
The process is that only one filter membrane clamp mounting hole is arranged on the rotary table, and the filter membrane taking, the sampling, the drying and the weighing are needed to be completed one by one. The rotary table can be set to be round, three filter membrane clamp mounting holes are formed, the three mounting holes are uniformly distributed on the circumference of the rotary table (as shown in fig. 7), the three mounting holes are respectively located at the pick-and-place station, the sampling and drying station and the weighing station, and at the moment, the filter membrane clamp pick-and-place, the sampling or the drying and the weighing are simultaneously carried out under the control of the single chip microcomputer, so that the working efficiency is accelerated.
The integrated beta-ray smoke mass weighing instrument of the embodiment realizes the connection of the sampling head and the heat tracing hose of the main case through the quick connecting mechanism, integrates sampling and weighing, and is suitable for sampling of various flues. The filter membrane is clamped and placed through the rotary table, the sample collection device, the drying device and the weighing device are integrated, the structure is compact, and the portability is good. Wherein the filter membrane is dried and is heated and air-dried simultaneously, and drying efficiency is high. The self-provided back-blowing device cleans the sampling pipeline and improves the sampling precision. The weighing instrument can be connected with the existing particle detection host of a monitoring unit for use, and equipment upgrading can be realized without purchasing a sampling pump and a concentration analysis unit again.
The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present invention without departing from the technical content of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a sample and integrated beta ray smoke and dust quality weighing instrument of weighing, includes sampling head and mainframe box, its characterized in that: the sampling head is connected with the main case through a heat tracing hose; the main case is internally fixed with a beta-ray detection module and a rotatable turntable, and a filter membrane clamp mounting hole is formed in the turntable; an upper sealing cover and a lower sealing cover are also arranged in the main case, the upper sealing cover is connected to a smoke tube in the sampling head through an air inlet tube, the lower sealing cover is connected to the outside of the case through an air outlet tube, and a sampling air passage is formed when the upper sealing cover and the lower sealing cover compress the mounting hole of the filter membrane clamp; an air inlet three-way valve is arranged on the air inlet pipe, a third joint of the air inlet three-way valve is connected with the high-efficiency filter, and a filter membrane in the rotary table rotary mounting hole can be positioned between the upper sealing cover and the lower sealing cover and at the beta-ray detection module.
2. The integrated sampling and weighing β -ray smoke mass weighing apparatus of claim 1, wherein: an air outlet three-way valve is arranged on the air outlet pipe, and a third joint of the air outlet three-way valve is connected with the back blower.
3. The integrated sampling and weighing β -ray smoke mass weighing apparatus of claim 1, wherein: the sampling head comprises a smoke tube, a Pitot tube and a smoke temperature tube.
4. The integrated sampling and weighing β -ray smoke mass weighing apparatus of claim 1, wherein: and the air inlet pipe, the upper sealing cover and the lower sealing cover are respectively coated with an electric heating belt.
5. The integrated sampling and weighing β -ray smoke mass weighing apparatus of claim 1, wherein: the lower sealing cover is connected with an eccentric wheel, a compression spring is arranged between the lower sealing cover and the main case, and the eccentric wheel is driven by an eccentric wheel motor to rotate so as to drive the lower sealing cover to lift.
6. The integrated sampling and weighing β -ray smoke mass weighing apparatus of claim 1, wherein: the side wall of the mainframe box is provided with a taking and placing opening, one of the filter membrane clamp mounting holes stretches out of the taking and placing opening when the turntable rotates, and the taking and placing opening is provided with a baffle door capable of opening and closing.
7. The integrated sampling and weighing β -ray smoke mass weighing apparatus of claim 6, wherein: the electric door opening and closing device is characterized in that a sliding rail and a door opening and closing motor are arranged on the main case, the baffle door is arranged on the sliding rail through a sliding block, a motor shaft is connected with a crank, the other end of the crank is hinged with a connecting rod, the connecting rod is hinged with the sliding block, and the electric opening and closing of the baffle door are realized.
8. The integrated sampling and weighing β -ray smoke mass weighing apparatus according to any one of claims 2-7, wherein: and three filter membrane clamp mounting holes are formed in the rotary table.
9. The integrated sampling and weighing β -ray smoke mass weighing apparatus of claim 8, wherein: the main case is provided with an upper flip cover, the bottom surface of the upper flip cover is provided with a display screen, and the main case is also provided with control buttons and an input keyboard.
10. The integrated sampling and weighing β -ray smoke mass weighing apparatus of claim 9, wherein: a singlechip is arranged in the main case, and the input end of the singlechip is connected with a beta-ray detection module, a sampling head and an input keyboard; the output end is connected with a back blower, a door opening and closing motor and a display screen.
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| CN201710706572.5A CN107238548B (en) | 2017-08-17 | 2017-08-17 | Sampling and weighing integrated beta-ray smoke mass weighing instrument |
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| CN201710706572.5A CN107238548B (en) | 2017-08-17 | 2017-08-17 | Sampling and weighing integrated beta-ray smoke mass weighing instrument |
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| CN107238548B true CN107238548B (en) | 2023-06-23 |
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| CN108469361B (en) * | 2018-07-03 | 2024-03-19 | 青岛明华电子仪器有限公司 | Detachable integrated beta ray smoke dust direct-reading test probe |
| CN113252595B (en) * | 2021-05-19 | 2024-01-02 | 广州特种承压设备检测研究院 | Intelligent detector is synthesized in environmental protection of boiler efficiency |
| CN114018658B (en) * | 2021-11-09 | 2022-06-21 | 中国人民解放军总医院第五医学中心 | Air sample collector for regional infectious disease investigation equipment |
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2017
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Address after: 266000 No. 1, Yueyang Road, Chengyang District, Qingdao City, Shandong Applicant after: Qingdao Zhongrui Intelligent Instrument Co.,Ltd. Address before: 266107, Shandong Road, Chengyang District, Shandong, Qingdao Province, Xian Road, No. 3 Applicant before: QINGDAO ZHONGRUI INTELLIGENT INSTRUMENT Co.,Ltd. |
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