CN212658514U - Sampling device for exhaust-gas detection - Google Patents
Sampling device for exhaust-gas detection Download PDFInfo
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- CN212658514U CN212658514U CN202020873056.9U CN202020873056U CN212658514U CN 212658514 U CN212658514 U CN 212658514U CN 202020873056 U CN202020873056 U CN 202020873056U CN 212658514 U CN212658514 U CN 212658514U
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Abstract
The utility model relates to a sampling device for waste gas detection, which comprises an instrument host, a shell, a controller arranged in the shell and a motor connected with a control signal output end of the controller; the power output end of the motor is connected with an air pump; one end of the absorption tube is connected with the air pump and is used for placing absorption liquid to absorb harmful gas in the waste gas to form solution to be detected; a flow meter, one signal output end of which is connected with one input end of the controller, and is used for detecting the gas flow discharged from the absorption tube; and the cutter is connected with the exhaust end of the absorption pipe and used for filtering particulate matters in the exhaust gas. The utility model belongs to the technical field of exhaust-gas detection, can solve current waste gas sampling device when taking a sample to waste gas, the granule in the waste gas damages sampling device to and the problem of directly gathering waste gas because of the easy error that produces of temperature deviation after taking a sample, have not fragile and waste gas sample and be difficult for causing the advantage of deviation as a result.
Description
Technical Field
The utility model belongs to the technical field of exhaust-gas detection's technique and specifically relates to a sampling device for exhaust-gas detection is related to.
Background
At present, the waste gas refers to toxic and harmful gas discharged by human beings in the production and living processes, especially the gas discharged by coking plants such as chemical plants, steel plants, pharmaceutical plants and the like in the production activities, the waste gas comprises carbon monoxide, sulfur dioxide, dust, solid particles and the like, the smell of the gas is large, and the air quality and the human health are seriously affected. Therefore, the tester is a quality-poor quality to sample and detect the waste gas often, judges whether the waste gas of emission is qualified according to the testing result.
The utility model discloses a current utility model patent that publication number is CN207081592U discloses a novel exhaust gas sampling ware, and it includes remote controller, support frame A, support frame B, baffle, shell, sample connection, handle and inner core, the sample connection is hollow circular cylinder, the shell with the inner core is the cavity cuboid. When receiving remote control information, the baffle can descend automatically to press the waste gas in the shell into the inner core through powerful suction, preserve the waste gas of sampling, accomplish the sample. Compared with the prior art, the simple and easy air pump is manually used to insert the exhaust pipe to extract a certain amount of gas, and then the gas in the air pump is discharged into the analyzer in a better mode, but the waste gas contains a large amount of particles, along with the increase of the service time, the particles can damage the inner core and other parts, the collected gas is leaked, the collection amount is small, the analysis is not convenient to be accurate, in addition, the volume of the collected gas after cooling can be changed, partial components are adhered to the inner wall of the inner core, and the result deviation is caused.
Therefore, a sampling device for exhaust gas detection is required to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a sampling device for exhaust-gas detection exists, can solve current exhaust-gas sampling device when taking a sample to waste gas, the granule in the waste gas damages sampling device to and the problem of directly gathering waste gas because of the easy error that produces of temperature deviation after taking a sample, have not fragile and the waste gas sample is difficult for causing the advantage of result deviation.
The above object of the present invention can be achieved by the following technical solutions:
a sampling device for exhaust gas detection, comprising:
the instrument host comprises a shell, a controller arranged in the shell and a motor connected with a control signal output end of the controller;
the air pump is connected with the power output end of the motor;
the absorption tube is used for placing absorption liquid to absorb harmful gas in the waste gas to form solution to be detected, and one end of the absorption tube is connected with the air pump;
the flowmeter is used for detecting the flow of the gas discharged from the absorption tube, and a signal output end of the flowmeter is connected with an input end of the controller; and
and the cutter is used for filtering particulate matters in the exhaust gas, and the exhaust end of the cutter is connected with the other end of the absorption pipe.
Through adopting above-mentioned technical scheme, the controller can the starter motor drive the air pump for the air pump operation, under the effect of air pump, waste gas is inhaled the cutterbar, then through the dust removal effect of cutterbar, gets into the absorption tube with the particulate matter in the waste gas after detach waste gas, and the gas that awaits measuring in the waste gas is absorbed by the absorption liquid and is formed and wait to detect solution and at the absorption tube enrichment, waits to collect the back that finishes, closes the sampling process that the exhaust-gas detection used with the instrument host computer. In addition, the flowmeter can obtain the flow of waste gas, and the measurement personnel can calculate the accurate volume of the waste gas sample of getting according to sample time and flowmeter.
The present invention may be further configured in a preferred embodiment as: the motor is a speed regulating motor.
By adopting the technical scheme, the rotating speed of the speed regulating motor can be changed, and the air pumping speed of the air pump can be further changed, so that the time for the waste gas to pass through the absorption tube is in a proper range. Therefore, the gas to be detected in the waste gas is fully absorbed, and the inaccurate detection result is avoided.
The present invention may be further configured in a preferred embodiment as: the air pump is a diaphragm pump.
Through adopting above-mentioned technical scheme, the gas tightness of diaphragm pump is high, and low noise and low vibrations, therefore take out the effect of waste gas better.
The present invention may be further configured in a preferred embodiment as: the cutter is a cyclone cutter.
Through adopting above-mentioned technical scheme, the air current of whirlwind formula cutterbar gets into from its air inlet tangential, and the spiral is downward, and the particulate matter of great particle diameter can be collected because of centrifugal force effect, and less particulate matter follows the air current and moves, changes the air current direction at the bottom, flows by the gas outlet, and dust removal effect is good.
The present invention may be further configured in a preferred embodiment as: the alarm is arranged on the outer surface of the shell and is connected with a signal output end of the controller.
Through adopting above-mentioned technical scheme, when the intake pipe was blockked up or when damaging, numerical value waste gas flow numerical value that detects when the flowmeter was zero, passed the signal to the controller, controller output control signal made the alarm send alarm signal, and measurement personnel can stop the sample immediately, avoids the utility model discloses take place to damage.
The present invention may be further configured in a preferred embodiment as: the alarm is a warning light and/or a honey device.
Through adopting above-mentioned technical scheme, the warning light can provide visual alarm signal for the measurement personnel, and the measurement personnel of being convenient for in time discover the utility model discloses a trouble, and the honey ware can send alarm sound, lets measurement personnel and can in time discover the problem to take corresponding measure.
The present invention may be further configured in a preferred embodiment as: the flowmeter is a rotor flowmeter.
Through adopting above-mentioned technical scheme, rotameter has simple structure, advantage such as directly perceived, loss of pressure is little and easy maintenance, very is applicable to the measurement and passes through the small flow that pipeline diameter D <150 mm.
The present invention may be further configured in a preferred embodiment as: the cutter is characterized by further comprising an air inlet pipe connected with one end of the cutter, and the sizes of two end faces of the air inlet pipe are larger than that of the middle of the air inlet pipe.
By adopting the technical scheme, the air inlet pipe is arranged in front of the cutter, the sizes of the two ends of the air inlet pipe are larger than the size of the middle of the air inlet pipe, the phenomenon that the flow speed of fluid is increased when the fluid flows in a limited mode through the reduced flow cross section is achieved according to the Venturi effect, and the flow speed of the fluid is inversely proportional to the flow cross section. Therefore, when the waste gas enters the cutter during sampling, the flow rate can be reduced, so that the dust removal effect of the cutter is better.
The present invention may be further configured in a preferred embodiment as: and a filter screen is arranged at the air inlet end of the air inlet pipe.
Through adopting above-mentioned technical scheme, the setting of filter screen can prevent that leaf or large granule thing from getting into from the intake pipe in the sample process, destroying the cutterbar.
To sum up, the utility model discloses a following at least one useful technological effect:
1. through the dust removal effect of the cutter, the waste gas enters the absorption tube after particulate matters in the waste gas are removed, the gas to be detected in the waste gas is absorbed by the absorption liquid to form a solution to be detected and is enriched in the absorption tube, and after the collection is finished, the instrument host is closed to complete the sampling process for detecting the waste gas;
2. warning light, honey ware can send alarm signal, and the measurement personnel can stop the sample immediately, avoid the utility model discloses take place to damage.
Drawings
Fig. 1 is a block diagram of an exhaust sampling process in an embodiment of the present invention.
Fig. 2 is a schematic diagram of the overall structure of the embodiment of the present invention.
Fig. 3 is a schematic diagram of a controller according to an embodiment of the present invention.
Fig. 4 is a schematic view of the overall structure inside the casing for displaying the embodiment of the present invention.
In the figure, the device comprises a device main unit 1, an instrument main unit 11, a shell 12, a controller 13, a motor 2, an air pump 3, an absorption tube 4, a flowmeter 5, a cutter 6, an alarm 7, an air inlet tube 71 and a filter screen.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, for the embodiment of the present invention discloses a sampling device for exhaust gas detection, which mainly comprises an instrument main unit 1, an air pump 2, an absorption tube 3, a flow meter 4, a cutter 5, and the like.
The instrument main body 1 includes a housing 11, a controller 12, and a motor 13. The housing 11 may be a rectangular box with a cavity therein, the controller 12 is installed in the housing 11, and the motor 13 is disposed in the housing 11 and connected to a control signal output terminal of the controller 12. Wherein the controller 12 is used as a control center of the whole sampling device, and the controller 12 can control the motor to operate, so that the whole sampling device starts to operate.
Referring to fig. 1 and 3, in some possible implementations, the controller 12 may be a CPU, microprocessor, ASIC, or one or more integrated circuits for controlling the execution of the programs described above. The controller 12 is mainly composed of a CPU121, a RAM122, a ROM123, a system bus 124, a power supply 125, and the like. The CPU121, the RAM122, the ROM123, and the power supply 125 are all connected to a system bus 124, and the motor 13 is connected to the system bus 124 through an external output interface 126.
As a possible implementation, the controller 12 may be an integrated circuit of an AT86C51 single chip microcomputer.
Referring to fig. 1 and 4, the motor 13 is used for driving the air pump 2 to rotate, and a power output end of the motor 13 is connected with the air pump 2 through gear transmission. When the controller 12 sends a control signal, the motor 13 is turned on to rotate, and the air pump 12 is driven to open through gear transmission to pump air, so that the whole sampling device starts to sample waste gas.
The air pump 2 can form negative pressure at the pumping port thereof, and is used for pumping the waste gas under the action of atmospheric pressure to sample the waste gas. The air pump 2 can be mounted on the housing 11 by bolts and connected with the motor 13 in a gear transmission manner, and after the motor 13 rotates, the air pump 2 is started.
Absorption liquid or absorbent is placed in the absorption tube 3, and the absorption liquid or absorbent is usually used for collecting and sampling the waste gas passing through the absorption tube 3, such as water, sodium hydroxide solution, organic solvent and the like. The air inlet end of the air-flow meter can be connected with the air outlet end of the cutter 5 through a hose, and the air outlet end of the air-flow meter can be connected with the air inlet end of the flow meter 4 through a hose.
As a possible implementation, the absorber pipe 3 may be a capillary glass pipe.
The flow meter 4 is used for detecting the flow rate of gas discharged from the absorption pipe 3 for a certain period of time, and both ends thereof are connected to the discharge end of the absorption pipe 3 and the gas inlet of the gas pump 2 through hoses, respectively. The flow meter 4 is also connected to the controller 12 via a peripheral input interface 127.
The cutter 5 is used for removing the particles in the waste gas, so that the particles are prevented from damaging the sampling device, and meanwhile, the detection result of the waste gas is influenced. The cutter 5 mainly comprises a cylinder, a collecting box arranged at the bottom of the cylinder, an air inlet branch pipe connected with the side wall of the cylinder and an air outlet branch pipe arranged at the top of the cylinder. When the waste gas flow tangentially enters the cylinder body from the gas inlet branch pipe and spirals downwards, the particles settle under the gravity and the centrifugal force, and the dust removal effect is achieved. The dedusted gas enters the absorber pipe 3 from the exhaust branch of the cutter 5.
After the instrument host 1 starts, controller 12 driving motor 13 rotates, under the drive of motor 13, air pump 2 produces the negative pressure, waste gas is inhaled cutterbar 51, after the dust removal of cutterbar 51, gaseous admission absorption tube 3, the gas that awaits measuring is absorbed by absorption liquid or absorbent in the absorption tube 3, the flow of waste gas can be surveyed to flowmeter 4, the measurement personnel can be according to sample time and flow, can calculate the volume of accurate waste gas sample of getting, the work of waste gas sample has been accomplished promptly.
As a pair of the utility model provides an embodiment of a preferred of sampling device for exhaust-gas detection, motor 13 is the buncher. It will be appreciated that the toxic gas in the exhaust gas with detection will be sufficiently dissolved in the absorption liquid for a different length of time, and therefore the flow rate of the gas stream will need to be adjusted, and the adjustment will be made by changing the rotational speed of the motor 13, which is a simpler process.
As the utility model provides a pair of sampling device for exhaust-gas detection's a preferred embodiment, air pump 2 is the diaphragm pump, and the diaphragm pump is also known as the control pump, relies on the round trip of a diaphragm to be shaken and changes its studio volume to inhale and discharge fluid. The diaphragm pump has good passing performance and explosion resistance, and can be used in inflammable and explosive places, so that the effect of using the diaphragm pump is better.
As the utility model provides a pair of sampling device for exhaust-gas detection's a preferred embodiment, cutterbar 5 is whirlwind formula cutterbar, because of the pressure drag of whirlwind formula cutterbar is smaller, can hold more particulate matter moreover, often is arranged in the sampling device that the industry flies up.
As a pair of the utility model provides an embodiment of a sampling device for exhaust-gas detection's a preferred, refer to fig. 2 and 4, still installed alarm 6 on casing 11's the surface, alarm 6 can send alarm signal, and when big particulate matter or leaf etc. blockked up the air inlet pipeline, whole sampling device was in idle running state, and no fluid passes through, causes the sampling device to damage easily. Therefore, the alarm 6 sends out an alarm signal at the moment, so that the detection personnel can stop the waste gas sampling in time. The alarm 6 is connected to a signal output of the controller 12, which is connected to the system bus 124 in the controller 12 via the peripheral output interface 128.
Further, alarm 6 is warning light and/or bee calling organ, and warning light can produce the alarm signal in the vision, and bee calling organ can produce the alarm signal in the sense of hearing, is perceived by personnel around the easiest, can let the measurement personnel in time discover the trouble to shut down sampling device, can avoid the long-time idle running of machine to damage.
As the utility model provides a pair of sampling device for exhaust-gas detection's an embodiment of preferred, flowmeter 4 is rotameter, and rotameter is applicable to and measures the fluidic flow in being less than 150mm through the pipeline diameter, also can measure the flow of corrosive medium. The rotor flowmeter mainly comprises a conical pipe which is gradually enlarged from bottom to top, a rotor which is arranged in the conical pipe and can freely move up and down along the central line of the pipe, and the like. When the flow velocity of the waste gas flow is increased or decreased, the rotor moves upwards or downwards, the flow cross-sectional area of the corresponding position is changed, and the rotor is stabilized at a new position until the corresponding velocity when the flow velocity becomes balanced.
As the utility model provides a pair of sampling device's for exhaust-gas detection embodiment of a preferred reduces for the velocity of flow when letting the waste gas air current get into cutterbar 5 to reach better dust removal effect. An air inlet pipe 7 is connected to one end of the cutter 5, and the connection mode can be threaded connection or welding. The sizes of the two end faces of the air inlet pipe 7 are larger than the size of the middle part, and according to the Venturi effect, the flow speed of the exhaust gas entering the cutter 5 from the exhaust end of the air inlet pipe 7 can be reduced, so that the time of the exhaust gas passing through the cutter 5 is prolonged, and the dust removal effect is better.
Further, the air inlet end of the air inlet pipe 7 is provided with a filter screen 71, referring to fig. 2, the filter screen 71 can be used for preventing objects such as leaves from entering the air inlet pipe 7 during detection, and then the objects enter the cutter 5 through the air inlet pipe 7 to damage the cutter 5. The connection of the filter screen 71 to the air inlet end of the air inlet pipe 7 may be by welding.
When exhaust-gas detection personnel used the utility model discloses a sampling device for exhaust-gas detection carries out the waste gas sample, at first places sampling device in the region of treating the sample, then with 1 switch on of instrument host computer after, instrument host computer 1 opens, and controller 12 produces control signal, makes motor 13 rotate. The motor 13 drives the air pump 2 and the resulting negative pressure draws air from the air inlet 7 into the cutter 5.
After the particulate matter is removed, the exhaust gas flow flows through the absorption pipe 3, the substance to be detected in the exhaust gas is absorbed by the absorption liquid in the absorption pipe 3, and the rest gas is discharged. By the end of sampling, the main unit 1 can be turned off. In the sampling process, when the exhaust gas sampling is abnormal or the exhaust gas flow data is abnormal, the controller 12 receives the information that the exhaust gas flow data obtained by the flowmeter 4 is abnormal, and then sends a control signal to the alarm 6, so that the alarm 6 sends an alarm signal, a detector can timely find the exhaust gas flow data is abnormal, and the instrument host 1 is closed.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (9)
1. A sampling device for exhaust gas detection, comprising:
the instrument main unit (1) comprises a shell (11), a controller (12) arranged in the shell (11) and a motor (13) connected with a control signal output end of the controller (12);
the air pump (2) is connected with the power output end of the motor (13);
the absorption pipe (3) is used for placing absorption liquid to absorb harmful gas in the waste gas to form a solution to be detected, and one end of the absorption pipe is connected with the air pump (2);
a flow meter (4) for detecting the flow of gas discharged from the absorber pipe (3), a signal output terminal of which is connected to an input terminal of the controller (12); and
and the cutter (5) is used for filtering particulate matters in the exhaust gas, and the exhaust end of the cutter is connected with the other end of the absorption pipe (3).
2. The sampling device for exhaust gas detection according to claim 1, wherein: the motor (13) is a speed-regulating motor.
3. The sampling device for exhaust gas detection according to claim 1, wherein: the air pump (2) is a diaphragm pump.
4. The sampling device for exhaust gas detection according to claim 1, wherein: the cutter (5) is a cyclone cutter.
5. The sampling device for exhaust gas detection according to claim 1, wherein: the alarm device is characterized by further comprising an alarm device (6) arranged on the outer surface of the shell (11), wherein the alarm device (6) is connected with a signal output end of the controller (12).
6. The sampling device for exhaust gas detection according to claim 5, wherein: the alarm (6) is a warning lamp and/or a honey device.
7. The sampling device for exhaust gas detection according to claim 1, wherein: the flowmeter (4) is a rotor flowmeter.
8. The sampling device for exhaust gas detection according to claim 1, wherein: the cutter is characterized by further comprising an air inlet pipe (7) connected with one end of the cutter (5), and the size of two end faces of the air inlet pipe (7) is larger than that of the middle of the air inlet pipe.
9. The sampling device for exhaust gas detection according to claim 8, wherein: and a filter screen (71) is arranged at the air inlet end of the air inlet pipe (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020873056.9U CN212658514U (en) | 2020-05-22 | 2020-05-22 | Sampling device for exhaust-gas detection |
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| CN202020873056.9U CN212658514U (en) | 2020-05-22 | 2020-05-22 | Sampling device for exhaust-gas detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839122A (en) * | 2022-07-04 | 2022-08-02 | 山东省煤田地质局第五勘探队 | Environment particulate matter sampling and measuring device and measuring method thereof |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839122A (en) * | 2022-07-04 | 2022-08-02 | 山东省煤田地质局第五勘探队 | Environment particulate matter sampling and measuring device and measuring method thereof |
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