CN212845008U - Methyl bromide concentration detection device - Google Patents
Methyl bromide concentration detection device Download PDFInfo
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- CN212845008U CN212845008U CN202021682946.8U CN202021682946U CN212845008U CN 212845008 U CN212845008 U CN 212845008U CN 202021682946 U CN202021682946 U CN 202021682946U CN 212845008 U CN212845008 U CN 212845008U
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Abstract
The embodiment of the utility model discloses methyl bromide concentration detection device, include: the device comprises a shell, a high-concentration detection module, a low-concentration detection module and a control module, wherein the high-concentration detection module, the low-concentration detection module and the control module are all arranged on the shell; the high-concentration detection module is used for detecting high-concentration methyl bromide gas, and the low-concentration detection module is used for detecting low-concentration methyl bromide gas; the control module is used for controlling the high-concentration detection module and the low-concentration detection module to work simultaneously or controlling one of the high-concentration detection module and the low-concentration detection module to work independently. The embodiment of the utility model provides a. The embodiment of the utility model provides a bromomethane concentration detection device, high concentration detection module, low concentration detection module and control module all locate in the same casing for the gaseous detection of high concentration bromomethane and low concentration bromomethane can be realized by a detection device.
Description
Technical Field
The embodiment of the utility model provides a relate to gaseous detection technical field, especially relate to a methyl bromide concentration detection device.
Background
Because the methyl bromide has strong fumigating effect and can kill various pests with high efficiency and broad spectrum, the methyl bromide is still a better choice of the fumigant. However, methyl bromide also has a certain toxic effect on human bodies and natural environment, and therefore, the concentration of methyl bromide used as a fumigant needs to be strictly controlled in the fumigation process.
In order to effectively kill pests, the fumigation is too heavy, and high-concentration methyl bromide gas is needed to be used, but the environment is easily polluted due to too high concentration, so that the high-concentration methyl bromide gas needs to be detected during the fumigation to determine that the gas concentration meets the requirements of the fumigation operation. After the fumigation is finished, the concentration of the high-concentration methyl bromide gas is reduced after the dissipation treatment, but the bearing capacity of a human body to the methyl bromide gas is limited, so that the detection of the low-concentration methyl bromide gas is necessary for ensuring the personal safety of workers.
At present, high-concentration methyl bromide is detected by a methyl bromide high-concentration detector, low-concentration methyl bromide is detected by a methyl bromide low-concentration detector, and the methyl bromide high-concentration detector and the methyl bromide low-concentration detector are different instruments and equipment and are inconvenient to carry simultaneously. In addition, concentration detection has different sampling modes, and the current detection instrument needs a worker to manually switch the sampling mode, so that the operation is troublesome.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a bromomethane concentration detection device to a device that can realize high concentration bromomethane gas detection and low concentration bromomethane gas detection simultaneously is provided, and can conveniently switch sampling mode fast.
The embodiment of the utility model provides a methyl bromide concentration detection device, include: the device comprises a shell, a high-concentration detection module, a low-concentration detection module and a control module, wherein the high-concentration detection module, the low-concentration detection module and the control module are all arranged on the shell;
the high-concentration detection module is used for detecting high-concentration methyl bromide gas, and the low-concentration detection module is used for detecting low-concentration methyl bromide gas;
the control module is used for controlling the high-concentration detection module and the low-concentration detection module to work simultaneously or controlling one of the high-concentration detection module and the low-concentration detection module to work independently.
Furthermore, the high-concentration detection module detects the concentration of the methyl bromide by adopting a non-dispersive infrared technology.
Further, the high concentration detection module includes: first sample connection, first sampling pump, infrared sensor and first exhaust port, first sample connection first sampling pump infrared sensor with first exhaust port connects gradually through first breather pipe.
Furthermore, a first filter is further arranged between the first sampling port and the first sampling pump, and a first pressure transmitter is further connected to a first vent pipeline between the first filter and the first sampling pump.
Further, the low concentration detection module detects the concentration of the methyl bromide by adopting a photoionization detection method.
Further, the low concentration detection module includes: second sample connection, second sampling pump, light ion detection sensor and second gas vent, the second sample connection the second sampling pump with the second gas vent passes through the second air duct and connects, light ion detection sensor locates second gas vent department.
Furthermore, a second filter is further arranged between the second sampling port and the second sampling pump, and a second pressure transmitter is further connected to a second vent pipeline between the second filter and the second sampling pump.
Further, the low concentration detection module further comprises a diffusion cover, the diffusion cover is opposite to the light ion detection sensor, and the second air outlet is located between the light ion detection sensor and the diffusion cover.
Furthermore, the device also comprises a power supply module, wherein the power supply module is used for supplying power to the high-concentration detection module, the low-concentration detection module and the control module.
Further, the control module comprises a touch display screen, and the touch display screen is used for receiving an externally input control signal.
The embodiment of the utility model provides a bromomethane concentration detection device, high concentration detection module, low concentration detection module and control module all locate in the same casing for the gaseous detection of high concentration bromomethane and low concentration bromomethane can be realized by a detection device. The embodiment of the utility model provides a bromomethane concentration detection device small in size, light in weight carries very easily, has greatly improved the convenience that the staff examined time measuring to bromomethane gas concentration.
Drawings
Fig. 1 is a schematic structural diagram of a methyl bromide concentration detection device provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another device for detecting a concentration of methyl bromide according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a high concentration detection module according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of another high concentration detection module according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a low concentration detection module according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of another low concentration detection module according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that the terms "first," "second," and the like may be used herein to describe various orientations, actions, steps, elements, or the like, but these orientations, actions, steps, or elements are not limited by these terms. These terms are only used to distinguish one direction, action, step or element from another direction, action, step or element. For example, a first sampling port may be referred to as a second sampling port, and similarly, a second sampling port may be referred to as a first sampling port, without departing from the scope of the present application. The first sample port and the second sample port are both sample ports, but they are not the same sample port. The terms "first", "second", etc. are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "plurality", "batch" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Example one
Fig. 1 is the embodiment of the present invention provides a structural schematic diagram of a methyl bromide concentration detection device, and this embodiment is applicable to the detection of methyl bromide concentration. As shown in fig. 1, a device for detecting the concentration of methyl bromide provided by the embodiment of the present invention includes: the high concentration detection module 200, the low concentration detection module 300 and the control module 400 are all arranged in the casing 100.
The high concentration detection module 200 is used for detecting high concentration bromomethane gas. The low concentration detection module 300 is used for detecting low concentration methyl bromide gas. The control module 400 is used to control the high concentration detection module 200 and the low concentration detection module 300 to operate simultaneously, or to control one of the high concentration detection module 200 and the low concentration detection module 300 to operate alone.
In this embodiment, the high-concentration detection module 200 detects the concentration of the methyl bromide by using a Non-Dispersive InfraRed (NDIR) technology. The infrared light source emits infrared light to the high-concentration bromomethane gas to be detected, the high-concentration bromomethane gas to be detected has certain absorption effect on the infrared light with specific wavelength, after the infrared light is absorbed, the spectrum intensity in direct proportion to the gas concentration can be changed, the concentration of the high-concentration bromomethane gas to be detected can be reversely deduced by calculating the variation of the spectrum light intensity, and the NDIR technology is provided. The high-concentration detection module 200 adopting the NDIR technology has the characteristics of high precision, quick response, good stability, portability and the like.
In this embodiment, the low concentration detection module 300 detects the concentration of the methyl bromide by using a Photo Ionization Detector (PID) method. The detection principle of PID is as follows: ultraviolet rays are emitted by the ultraviolet lamp, so that the low-concentration bromomethane gas is ionized under the excitation of the ultraviolet rays, and the ionized bromomethane gas has positive and negative charges, so that current is generated between the two electrodes, and the concentration of the low-concentration bromomethane gas can be reversely deduced through the current. The low concentration detection module 300 adopting the PID method has the characteristics of high sensitivity, high stability, small volume and the like.
Further, referring to fig. 2, the device for detecting a concentration of methyl bromide provided by the embodiment of the present invention further includes a power module 500. The power module 500 is connected to the high concentration detection module 200, the low concentration detection module 300, and the control module 400, respectively, to supply power to these modules. In this embodiment, the power module 500 is a 8000mAh lithium battery.
Further, referring to fig. 2, the control module 400 further includes a touch display screen 410, and a plurality of control buttons are disposed on the touch display screen 410, and can receive control signals input from the outside through the control buttons. For example, when the operator selects the high concentration methyl bromide detection by touching the display screen 410, the control module 400 controls the high concentration detection module 200 to start operating. For another example, if the operator selects the high concentration methyl bromide detection and the low concentration methyl bromide detection at the same time by touching the display screen 410, the control module 400 controls the high concentration detection module 200 and the low concentration detection module 300 to start to operate at the same time. In this embodiment, the touch display screen 410 is preferably a capacitive touch display screen with a small volume.
Further, a temperature and humidity detection module can be further arranged in the shell 100 and used for detecting the temperature and humidity of the methyl bromide gas in real time and automatically compensating the detection result of the concentration of the methyl bromide gas through the temperature and humidity detection result. The housing 100 size is preferably 235 x 115 mm.
The embodiment of the utility model provides a bromomethane concentration detection device, high concentration detection module, low concentration detection module and control module all locate in the same casing for the gaseous detection of high concentration bromomethane and low concentration bromomethane can be realized by a detection device. The embodiment of the utility model provides a bromomethane concentration detection device small in size, light in weight carries very easily, has greatly improved the convenience that the staff examined time measuring to bromomethane gas concentration.
Example two
Fig. 3 is a schematic structural diagram of a high concentration detection module according to an embodiment of the present invention, which is further detailed in the above embodiment. As shown in fig. 3, the utility model provides a high concentration detection module includes: the first sampling port 210, the first sampling pump 220, the infrared sensor 230 and the first exhaust port 240 are connected in sequence, and the first sampling port 210, the first sampling pump 220, the infrared sensor 230 and the first exhaust port 240 are connected in sequence through a first ventilation pipe 250.
When the high concentration detection module works, the first sampling pump 220 samples the high concentration bromomethane gas to be detected through the first sampling port 210, the sampled high concentration bromomethane gas to be detected is transmitted to the infrared sensor 230 through the first ventilation pipeline 250, and the infrared sensor 230 detects the concentration of the high concentration bromomethane gas to be detected by adopting an NDIR technology. The detected high concentration bromomethane gas exits the high concentration detection module through the first exhaust port 240.
Further, referring to fig. 4, the present invention provides a high concentration detection module further comprising a first filter 260 and a first pressure transmitter 270, wherein the first filter 260 is disposed between the first sampling port 210 and the first sampling pump 220, and the first pressure transmitter 270 is connected to the first ventilation pipe 250 between the first filter 260 and the first sampling pump 220.
When detecting the high-concentration bromomethane gas, the first sampling pump 220 operates to sample the high-concentration bromomethane gas to be detected through the first sampling port 210. The sampled high-concentration bromomethane gas to be detected is transmitted to the first filter 260 through the first ventilation pipeline 250, and the first filter 260 filters the high-concentration bromomethane gas to be detected and filters impurity particles such as dust in the high-concentration bromomethane gas to be detected. The filtered high-concentration bromomethane gas to be detected enters the first sampling pump 220 through the first ventilation pipeline 250, and then is transmitted to the infrared sensor 230 by the first sampling pump 220. The infrared sensor 230 detects the concentration of the high-concentration bromomethane gas to be detected by the NDIR technique. The detected high concentration bromomethane gas exits the high concentration detection module through the first exhaust port 240. During the high concentration bromomethane gas detection process, the first pressure transmitter 270 is used to detect the gas circuit pressure in the first vent conduit 250 to determine whether the first vent conduit 250 is blocked, and at the same time, the pressure measured by the first pressure transmitter 270 is also used for the calculation of the gas concentration.
In this embodiment, the first sampling port 210 can adopt a quick coupling that conveniently connects with an external air pipe, and a specially designed sampling rod is connected through the quick coupling, so that the gas sampling detection can be conveniently carried out on the environment to be detected. The first exhaust port 240 may also be a quick connector to facilitate an external air pipe to allow the air to be discharged to a safe place.
The embodiment of the utility model provides a high concentration detection module carries out high concentration bromomethane gas concentration and detects time measuring, and it is high to detect the precision, and the response is fast and stability is good.
EXAMPLE III
Fig. 5 is a schematic structural diagram of a low concentration detection module provided in the third embodiment of the present invention, and this embodiment is a further refinement of the low concentration detection module in the above-mentioned embodiment. As shown in fig. 5, the utility model provides a low concentration detection module includes: the second sampling port 310, the second sampling pump 320, the photo-ion detection sensor 330(PID sensor) and the second exhaust port 340, the second sampling port 310, the second sampling pump 320 and the second exhaust port 340 are connected by a second vent pipe 350, and the photo-ion detection sensor 330 is disposed at the second exhaust port 340.
When the low concentration detection module works, the second sampling pump 320 samples the low concentration bromomethane gas to be detected through the second sampling port 310, the sampled low concentration bromomethane gas to be detected is transmitted to the second sampling pump 320 through the second vent pipe 350, and is transmitted to the second exhaust port 340 through the second vent pipe 350, and finally, the low concentration bromomethane gas to be detected is discharged into the detection area of the photo-ion detection sensor 330 through the second exhaust port 340. The photo-ion detection sensor 330 detects the low-concentration bromomethane gas to be detected by adopting a PID method, and the detected low-concentration bromomethane gas freely diffuses to the outside of the low-concentration detection module.
Further, referring to fig. 6, the present invention provides a low concentration detection module further comprising a second filter 360, a second pressure transmitter 370 and a diffusion cover 380. The second filter 360 is disposed between the second sampling port 310 and the second sampling pump 320. A second pressure transducer 370 is connected to the second vent line 350 between the second filter 360 and the second sample pump 320. The diffusion cover 380 is disposed opposite to the photo-ion detection sensor 330, and the second air outlet 340 is located between the photo-ion detection sensor 330 and the diffusion cover 380.
Since the low concentration detection module is provided with both the second sampling pump 320 and the diffusion cover 380, the low concentration detection module includes two gas sampling modes: pump-suction sampling and diffusion sampling. The pumping type sampling refers to sampling of the low-concentration bromomethane gas by the second sampling pump 320. Diffusion sampling refers to sampling of low-concentration methyl bromide gas through a diffusion hood 380.
When the low-concentration bromomethane gas is detected by using pumping type sampling, the second sampling pump 320 works to sample the low-concentration bromomethane gas to be detected by the second sampling port 310. The sampled low-concentration bromomethane gas to be detected is transmitted to the second filter 360 through the second vent pipe 350, and the second filter 360 filters the low-concentration bromomethane gas to be detected and filters out impurity particles such as dust in the low-concentration bromomethane gas to be detected. The filtered low-concentration bromomethane gas to be detected enters the second sampling pump 320 through the second vent pipe 350, is transmitted to the second exhaust port 340 through the second vent pipe 350, and is discharged into the detection area of the photo-ion detection sensor 330 through the second exhaust port 340. The photo-ion detection sensor 330 detects the low-concentration bromomethane gas to be detected by adopting a PID method, and the detected low-concentration bromomethane gas is freely diffused to the outside of the low-concentration detection module through the diffusion cover 380. During the detection of the low-concentration bromomethane gas, the second pressure transmitter 370 is used to detect the gas circuit pressure in the second gas channel 350 to determine whether the second gas channel 350 is blocked, and meanwhile, the pressure measured by the second pressure transmitter 370 is also used for calculating the gas concentration.
When diffusion sampling is used to detect low-concentration bromomethane gas, the second sampling pump 320 does not operate, and the low-concentration bromomethane gas to be detected enters the low-concentration detection module through the diffusion cover 380 and is diffused into the detection area of the photo-ion detection sensor 330. The photo-ion detection sensor 330 detects the low-concentration bromomethane gas to be detected by adopting a PID method, and the detected low-concentration bromomethane gas is freely diffused to the outside of the low-concentration detection module through the diffusion cover 380 again. The diffusion cover 380 also has a filtering function, and can filter out foreign particles such as dust and the like in the low-concentration bromomethane gas to be detected, which enters from the outside.
In this embodiment, whether the pump-suction sampling or the diffusive sampling is selected may be input with a corresponding control instruction through the touch display screen 410 of the control module 400.
The embodiment of the utility model provides a low concentration detection module has two kinds of sampling mode of pump suction type sampling and diffusion formula sampling concurrently, and touch display screen through control module can realize that the pump suction type sampling switches with a key of diffusion formula sampling, easy operation, convenient and fast.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A methyl bromide concentration detection device, comprising: the device comprises a shell, a high-concentration detection module, a low-concentration detection module and a control module, wherein the high-concentration detection module, the low-concentration detection module and the control module are all arranged on the shell;
the high-concentration detection module is used for detecting high-concentration methyl bromide gas, and the low-concentration detection module is used for detecting low-concentration methyl bromide gas;
the control module is used for controlling the high-concentration detection module and the low-concentration detection module to work simultaneously or controlling one of the high-concentration detection module and the low-concentration detection module to work independently.
2. The apparatus for detecting the concentration of methyl bromide according to claim 1, wherein the high concentration detection module detects the concentration of methyl bromide by using a non-dispersive infrared technology.
3. The methyl bromide concentration detection apparatus according to claim 2, wherein the high concentration detection module comprises: first sample connection, first sampling pump, infrared sensor and first exhaust port, first sample connection first sampling pump infrared sensor with first exhaust port connects gradually through first breather pipe.
4. The device for detecting the concentration of bromomethane of claim 3, wherein a first filter is further arranged between the first sampling port and the first sampling pump, and a first pressure transmitter is further connected to a first ventilation pipeline between the first filter and the first sampling pump.
5. The apparatus for detecting a concentration of methyl bromide according to claim 1, wherein the low concentration detection mode detects the concentration of methyl bromide by a photoionization detection method.
6. The apparatus for detecting a concentration of methyl bromide according to claim 5, wherein the low concentration detection module comprises: second sample connection, second sampling pump, light ion detection sensor and second gas vent, the second sample connection the second sampling pump with the second gas vent passes through the second air duct and connects, light ion detection sensor locates second gas vent department.
7. The apparatus for detecting the concentration of bromomethane of claim 6, wherein a second filter is further disposed between the second sampling port and the second sampling pump, and a second pressure transmitter is further connected to a second vent pipe between the second filter and the second sampling pump.
8. The apparatus for detecting a concentration of bromomethane of claim 7, wherein the low concentration detection module further comprises a diffusion cover, the diffusion cover being disposed opposite the photo-ion detection sensor, the second exhaust port being located between the photo-ion detection sensor and the diffusion cover.
9. The methyl bromide concentration detection apparatus according to any one of claims 1-8, further comprising a power module for supplying power to the high concentration detection module, the low concentration detection module and the control module.
10. The methyl bromide concentration detection device according to any one of claims 1-8, wherein the control module comprises a touch display screen for receiving an externally input control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021682946.8U CN212845008U (en) | 2020-08-13 | 2020-08-13 | Methyl bromide concentration detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021682946.8U CN212845008U (en) | 2020-08-13 | 2020-08-13 | Methyl bromide concentration detection device |
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| CN212845008U true CN212845008U (en) | 2021-03-30 |
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| CN202021682946.8U Active CN212845008U (en) | 2020-08-13 | 2020-08-13 | Methyl bromide concentration detection device |
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| CN (1) | CN212845008U (en) |
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