CN216208395U - Low-concentration particulate matter detection device in fixed pollution source waste gas - Google Patents
Low-concentration particulate matter detection device in fixed pollution source waste gas Download PDFInfo
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- CN216208395U CN216208395U CN202122103364.0U CN202122103364U CN216208395U CN 216208395 U CN216208395 U CN 216208395U CN 202122103364 U CN202122103364 U CN 202122103364U CN 216208395 U CN216208395 U CN 216208395U
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Abstract
The utility model relates to the technical field of environmental monitoring, in particular to a detection device for low-concentration particulate matters in waste gas of a fixed pollution source, which comprises a detection shell, wherein a membrane replacing mechanism, a membrane belt, a beta ray detection assembly and a power mechanism are arranged in the detection shell, the beta ray detection assembly comprises an air inlet pipeline and an air outlet pipeline, the membrane belt is arranged between the air inlet pipeline and the air outlet pipeline, two sides of the membrane belt are connected with the detection shell in a sliding manner, a plurality of circular filter sheets are uniformly arranged on the membrane belt at intervals, the periphery of each circular filter sheet is provided with a flexible deformation part, the flexible deformation parts are annular, and the air inlet pipeline and the air outlet pipeline can be tightly pressed on the flexible deformation parts under the action of the power mechanism. The low-concentration particulate matter detection device in the fixed pollution source waste gas detects particulate matters through beta rays, can replace the filtering membrane, has a simple structure, and can effectively avoid the damage of the filtering membrane.
Description
Technical Field
The utility model relates to the technical field of environmental monitoring, in particular to a detection device for low-concentration particulate matters in waste gas of a fixed pollution source
Background
Most of pollution sources causing serious air pollution are fixed in position or can not flow, such as flues, workshops and the like, the pollution sources are called fixed pollution sources, the emission of waste gas generated by the fixed pollution sources has strict standard indexes, the waste gas reaches related indexes after being monitored before being emitted, and only qualified and purified gas can be emitted into the air.
At present, in equipment for detecting low-concentration particulate matters, the Beta ray detection principle utilizes the principle of Beta ray attenuation, ambient air is sucked into a sampling pipe by a sampling pump and is discharged after passing through a filter membrane, particulate matters are precipitated on the filter membrane, when Beta rays pass through the filter membrane deposited with the particulate matters, the energy of the Beta rays is attenuated, and the concentration of the particulate matters can be calculated by measuring the attenuation. When using this kind of Beta ray detection method to detect atmospheric particulates, need change the filter membrane after detecting at every turn, and current this kind of equipment is comparatively loaded down with trivial details when changing the filter membrane, and it is complicated to change membrane mechanism, and is changing the damage that the membrane in-process easily caused the filter membrane.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problems, an object of the present invention is to provide a device for detecting low concentration particulate matter in stationary source exhaust gas, which detects particulate matter by beta rays and can replace a filter membrane, and which has a simple structure and can effectively prevent the filter membrane from being damaged.
In order to achieve the technical effect, the utility model adopts the following technical scheme:
the detection device for the low-concentration particulate matters in the waste gas of the fixed pollution source comprises a detection shell, wherein a membrane replacing mechanism, a membrane band, a beta ray detection assembly and a power mechanism are arranged in the detection shell, the beta ray detection assembly comprises an air inlet pipeline and an air outlet pipeline, the air inlet pipeline and the air outlet pipeline are coaxially arranged, the membrane band is arranged between the air inlet pipeline and the air outlet pipeline, the two sides of the membrane band are in sliding connection with the detection shell, a plurality of circular filter sheets are uniformly arranged on the membrane band at intervals, a flexible deformation part is arranged on the periphery of each circular filter sheet and is in a circular ring shape, the power mechanism is used for driving the air inlet pipeline and the air outlet pipeline to be close to or far away from each other, and the air inlet pipeline and the air outlet pipeline can be tightly pressed on the flexible deformation part under the action of the power mechanism; the detection shell is internally provided with a controller, and the film changing mechanism, the beta-ray detection assembly and the power mechanism are electrically connected with the controller.
Further, still include negative pressure suction pump, negative pressure suction pump through negative pressure connecting pipe with the pipeline intercommunication of giving vent to anger.
Further, trade membrane mechanism including drive roller, driven voller and servo motor, the both ends in membrane area respectively with drive roller and driven voller fixed connection, servo motor's output with the drive roller transmission is connected, just servo motor electricity is connected to the controller.
Further, the membrane area is in the inboard of flexible deformation portion still is equipped with the solid fixed ring of stereoplasm, the solid fixed ring of stereoplasm with the coaxial setting of flexible deformation portion just circular cassette is located the inboard of the solid fixed ring of stereoplasm.
Further, the detection shell is in the both sides in membrane area all are equipped with the spout, the both sides correspondence in membrane area is equipped with the location strip, the location strip inlay locate in the spout and with detection shell sliding connection.
Furthermore, the bottom of the positioning strip is provided with a positioning groove, the top of the positioning strip is provided with a positioning bulge, and the positioning bulge can be correspondingly embedded in the positioning groove.
Further, trade membrane mechanism still includes first guide roll and second guide roll, first guide roll and second guide roll are located respectively the both ends of spout and all with it is connected to detect the casing rotation.
Furthermore, the power mechanism comprises a bidirectional screw shaft which is rotatably connected with the detection shell, a first slider and a second slider are respectively arranged at two ends of the bidirectional screw shaft, the air inlet pipeline and the air outlet pipeline are respectively slidably connected with the first slider and the second slider, and the power mechanism further comprises a driving motor which is used for driving the bidirectional screw shaft to rotate.
Compared with the prior art, the utility model has the beneficial effects that: according to the device for detecting the low-concentration particulate matters in the waste gas of the fixed pollution source, the power mechanism is arranged in the detection shell and used for driving the air inlet pipeline and the air outlet pipeline to move relatively, the membrane belt is arranged between the air inlet pipeline and the air outlet pipeline, the flexible deformation part on the membrane belt is simultaneously pressed and sealed through the air inlet pipeline and the air outlet pipeline, the circular filter sheet on the inner side of the flexible deformation part is located between the air inlet pipeline and the air outlet pipeline, the low-concentration particulate matters in the waste gas of the fixed pollution source are captured, and finally the low-concentration particulate matters in the waste gas of the fixed pollution source are detected by calculating the energy attenuation of beta rays passing through the circular filter sheet. The membrane replacing mechanism in the device has simple structure, is convenient to replace the filtering membrane, has lower membrane replacing cost and can effectively avoid the damage of the filtering membrane.
Drawings
Fig. 1 is a schematic overall structure diagram of a device for detecting low-concentration particulate matter in exhaust gas of a stationary pollution source according to an embodiment of the present invention;
FIG. 2 is a schematic view of a part of an enlarged structure at A of a device for detecting low concentration particulate matter in exhaust gas of a stationary pollution source according to an embodiment of the present invention;
the reference signs are: 10, a detection shell, 11, a sliding chute, 20, a film belt, 21, a positioning strip, 211, a positioning groove, 212, a positioning protrusion, 23, a circular filter sheet, 24, a flexible deformation part, 25, a hard fixing ring, 31, an air inlet pipeline, 32, an air outlet pipeline, 33, a beta ray detector, 41, a driving roller, 42, a driven roller, 45, a servo motor, 43, a first guide roller, 44, a second guide roller, 51, a bidirectional screw shaft, 52, a first slide block, 53, a second slide block, 54 and a driving motor.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-2, the detection device for detecting low-concentration particulate matter in exhaust gas of a fixed pollution source provided in this embodiment includes a detection housing 10, a film replacing mechanism, a film strip 20, a β -ray detection assembly and a power mechanism are disposed in the detection housing 10, the β -ray detection assembly includes an air inlet pipe 31, an air outlet pipe 32 and a β -ray detector 33, the air inlet pipe 31 and the air outlet pipe 32 are coaxially disposed, the film strip 20 is disposed between the air inlet pipe 31 and the air outlet pipe 32, the β -ray detector 33 is disposed inside the housing, and the β -ray emitted by the β -ray detection assembly can pass through the film strip 20. A negative pressure suction pump is further arranged in the detection shell 10 and is communicated with the air outlet pipeline 32 through a negative pressure connecting pipe. A controller is further arranged in the detection shell 10, and the film changing mechanism, the beta-ray detection assembly and the power mechanism are electrically connected with the controller. In specific implementation, the fixed pollution source waste gas with particles is sucked by the negative pressure suction pump, so that the fixed pollution source waste gas sequentially passes through the air inlet pipeline 31, the membrane band 20 and the air outlet pipeline 32 and is deposited on the membrane band 20, the controller controls the beta ray detector 33 to emit beta rays and enable the beta rays to pass through the membrane band 20 with the particles deposited, and finally the energy attenuation of the beta rays is calculated to detect and calculate the concentration of the particles.
In this embodiment, the detection housing 10 is provided with sliding grooves 11 on both sides of the film strip 20, two sides of the film strip 20 are correspondingly provided with positioning strips 21, and the positioning strips 21 are embedded in the sliding grooves 11 and slidably connected with the detection housing 10, so that the film strip 20 can slide relative to the detection housing 10. A plurality of circular filter sheets 23 are uniformly arranged on the membrane belt 20 at intervals, and the area of the circular filter sheets is smaller than that of the air outlet end of the air inlet pipeline 31. The periphery of circular cassette 23 is equipped with flexible deformation portion 24, flexible deformation portion 24 is the ring form, power unit is used for the drive inlet tube 31 and outlet tube 32 are close to each other or keep away from, thereby are convenient for outlet tube 32 compresses tightly inlet tube 31. The air inlet pipeline 31 and the air outlet pipeline 32 can be tightly pressed on the flexible deformation part 24 under the action of a power mechanism; so that the circular filter sheet can be positioned between the air inlet pipe 31 and the air outlet pipe 32 to trap particulate matters in the sucked exhaust gas of the fixed pollution source. In specific implementation, the air inlet pipe 31 and the air outlet pipe 32 are close to each other under the action of the power mechanism, and the air outlet end of the air inlet pipe 31 and the air inlet end of the air outlet pipe 32 are in close contact with the flexible deformation portion 24, and the flexible deformation portion 24 can deform to seal the connection between the air inlet pipe 31 and the flexible deformation portion 24, and between the air outlet pipe 32 and the flexible deformation portion 24, so that the sucked waste gas of the fixed pollution source can permeate through the circular filter 23, and the particulate matters are deposited on the circular filter 23. Meanwhile, in order to avoid the flexible deformation part 24 from influencing the shape and filtering effect of the circular filter 23 when the flexible deformation part is deformed. The membrane area 20 is in the inboard of flexible deformation portion 24 still is equipped with the solid fixed ring 25 of stereoplasm, the solid fixed ring 25 of stereoplasm is made by rigid plastic, the solid fixed ring 25 of stereoplasm with the coaxial setting of flexible deformation portion 24 just circular cassette 23 is located the inboard of the solid fixed ring 25 of stereoplasm, in order to prevent circular cassette 23 produces deformation.
In this embodiment, the film changing mechanism includes a driving roller 41, a driven roller 42, a first guide roller 43, a second guide roller 44 and a servo motor 45, two ends of the film belt 20 are respectively fixedly connected with the driving roller 41 and the driven roller 42, an output end of the servo motor 45 is in transmission connection with the driving roller 41, and the servo motor 45 is electrically connected to the controller. The bottom of location strip 21 is equipped with positioning groove 211, the top of location strip 21 is equipped with location arch 212, location arch 212 can correspond to inlay and locate in positioning groove 211, first guide roll 43 and second guide roll 44 are located respectively the both ends of spout 11 and all with it is connected to detect the rotation of casing 10. Meanwhile, in order to avoid the deviation of the film strip 20 in the moving process, the bottom of the positioning strip 21 is provided with a positioning groove 211, the top of the positioning strip 21 is provided with a positioning protrusion 212, the positioning protrusion 212 can be correspondingly embedded in the positioning groove 211, and preferably, the cross sections of the positioning groove 211 and the positioning protrusion 212 are in a V shape.
In this embodiment, the power mechanism is configured to drive the air inlet pipe 31 and the air outlet pipe 32 to approach or separate from each other so as to replace the circular filter 23, and specifically, the power mechanism includes a bidirectional screw shaft 51 rotatably connected to the detection housing 10, a first slider 52 and a second slider 53 are respectively disposed at two ends of the bidirectional screw shaft 51, the air inlet pipe 31 and the air outlet pipe 32 are respectively slidably connected to the first slider 52 and the second slider 53, the power mechanism further includes a driving motor 54 configured to drive the bidirectional screw shaft 51 to rotate, and the driving motor 54 is electrically connected to the controller. In specific implementation, the driving motor 54 drives the bidirectional screw shaft 51 to rotate, so that the first slider 52 and the second slider 53 approach or separate from each other, and the first slider 52 and the second slider 53 respectively drive the air inlet pipe 31 and the air outlet pipe 32 to move.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the utility model as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (8)
1. The utility model provides a low concentration particulate matter detection device in fixed pollution sources waste gas which characterized in that: including detecting casing (10), be equipped with in detection casing (10) and trade membrane mechanism, membrane area (20), beta ray detection subassembly and power unit, beta ray detection subassembly includes admission line (31) and outlet pipe way (32), admission line (31) and outlet pipe way (32) coaxial arrangement, membrane area (20) are located between admission line (31) and outlet pipe way (32) just the both sides of membrane area (20) all with detect casing (10) sliding connection, the interval is equipped with a plurality of circular cassette filters (23) uniformly on membrane area (20), the periphery of circular cassette filter (23) is equipped with flexible deformation portion (24), flexible deformation portion (24) are the ring form, power unit is used for the drive admission line (31) and outlet pipe way (32) are close to each other or keep away from, admission line (31) and outlet pipe way (32) can compress tightly under the effect of giving vent to anger flexible deformation portion (power unit) 24) The above step (1); the film changing mechanism, the beta-ray detection assembly and the power mechanism are electrically connected with the controller.
2. The apparatus for detecting a low concentration of particulate matter in an exhaust gas from a stationary pollution source according to claim 1, wherein: the negative pressure suction pump is communicated with the air outlet pipeline (32) through a negative pressure connecting pipe.
3. The apparatus for detecting a low concentration of particulate matter in an exhaust gas from a stationary pollution source according to claim 1, wherein: trade membrane mechanism including drive roller (41), driven roller (42) and servo motor (45), the both ends of film tape (20) respectively with drive roller (41) and driven roller (42) fixed connection, the output of servo motor (45) with drive roller (41) transmission is connected, just servo motor (45) electricity is connected to the controller.
4. The apparatus for detecting a low concentration of particulate matter in an exhaust gas from a stationary pollution source according to claim 1, wherein: the membrane band (20) is in the inboard of flexible deformation portion (24) still is equipped with the solid fixed ring of stereoplasm (25), solid fixed ring of stereoplasm (25) with flexible deformation portion (24) coaxial setting just circular cassette (23) are located the inboard of solid fixed ring of stereoplasm (25).
5. The apparatus for detecting a low concentration of particulate matter in an exhaust gas from a stationary pollution source according to claim 1, wherein: detect casing (10) and be in the both sides of membrane area (20) all are equipped with spout (11), the both sides correspondence of membrane area (20) is equipped with location strip (21), location strip (21) inlay and locate in spout (11) and with detect casing (10) sliding connection.
6. The apparatus for detecting a low concentration of particulate matter in an exhaust gas from a stationary pollution source according to claim 5, wherein: the bottom of location strip (21) is equipped with positioning groove (211), the top of location strip (21) is equipped with location arch (212), location arch (212) can correspond to inlay and locate in positioning groove (211).
7. The apparatus for detecting a low concentration of particulate matter in an exhaust gas from a stationary pollution source according to claim 6, wherein: trade membrane mechanism still includes first guide roll (43) and second guide roll (44), first guide roll (43) and second guide roll (44) are located respectively the both ends of spout (11) and all with detect casing (10) and rotate and be connected.
8. The apparatus for detecting a low concentration of particulate matter in an exhaust gas from a stationary pollution source according to claim 1, wherein: the power mechanism comprises a bidirectional screw shaft (51) rotationally connected with the detection shell (10), a first slider (52) and a second slider (53) are respectively arranged at two ends of the bidirectional screw shaft (51), the air inlet pipeline (31) and the air outlet pipeline (32) are respectively in sliding connection with the first slider (52) and the second slider (53), and the power mechanism further comprises a driving motor (54) used for driving the bidirectional screw shaft (51) to rotate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122103364.0U CN216208395U (en) | 2021-09-02 | 2021-09-02 | Low-concentration particulate matter detection device in fixed pollution source waste gas |
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| CN202122103364.0U CN216208395U (en) | 2021-09-02 | 2021-09-02 | Low-concentration particulate matter detection device in fixed pollution source waste gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116223402A (en) * | 2023-04-24 | 2023-06-06 | 雅安市汉源生态环境监测站 | Detection device for phosphorus pentoxide in air |
| CN117309508A (en) * | 2023-09-06 | 2023-12-29 | 中国地质科学院矿产资源研究所 | Rare earth-containing mineral particle sampling device and method for rare earth ore thick soil coverage area |
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2021
- 2021-09-02 CN CN202122103364.0U patent/CN216208395U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116223402A (en) * | 2023-04-24 | 2023-06-06 | 雅安市汉源生态环境监测站 | Detection device for phosphorus pentoxide in air |
| CN117309508A (en) * | 2023-09-06 | 2023-12-29 | 中国地质科学院矿产资源研究所 | Rare earth-containing mineral particle sampling device and method for rare earth ore thick soil coverage area |
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