CN115931776A - Combustible gas detector - Google Patents
Combustible gas detector Download PDFInfo
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- CN115931776A CN115931776A CN202211536146.9A CN202211536146A CN115931776A CN 115931776 A CN115931776 A CN 115931776A CN 202211536146 A CN202211536146 A CN 202211536146A CN 115931776 A CN115931776 A CN 115931776A
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Abstract
The invention discloses a combustible gas detector which comprises a shell, a power supply module and a detection module. The power supply module is arranged in the shell. The detection module is installed in the casing. The detection module comprises an installation shell, a laser transmitter, a receiver, a temperature and pressure sensor and a control panel. The mounting shell is located in the housing. The laser emitter is arranged at one end of the mounting shell and used for emitting laser signals to the other end of the mounting shell. The receiver sets up in the one end that the laser emitter was kept away from to the installation shell for receive laser signal. The temperature and pressure sensor is arranged in the mounting shell and used for calibrating compensation values of methane concentration at different temperatures and atmospheric pressure. The control panel sets up in the installation shell. The invention adopts the correlation laser methane sensor, so that the equipment can work efficiently and stably, and the process flow is simplified. Meanwhile, the diffusion type underground well chamber detection mode reduces the number of key parts of the air suction type product, and greatly prolongs the service life of the product while ensuring the detection reliability of the product.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a combustible gas detector.
Background
Currently, underground pipe networks are already densely populated throughout cities. Because of gas pipeline leakage or methane gathering in the inspection well, explosion accidents are easily caused, and the personal and property safety of the whole city is greatly threatened. At present, the detection technology for combustible gas of urban underground well chambers mainly comprises a pumping type combustible gas detection technology.
Pump suction type combustible gas detection technique can effectual detection combustible gas concentration, but under underground well room environment, the aspirator pump receives the high corrosive gas of high humidity, and very easy failure, in addition under northern low temperature environment, the pump film also receives low temperature easily and loses efficacy. Therefore, the inhalation type combustible gas detection cannot effectively detect the pump failure. Meanwhile, the underground well chamber environment requires that the detection equipment can only adopt a battery for power supply, the starting current of the pump is large and accounts for about 45% of the energy consumption of the whole detection period, and therefore the air suction time of the pump is short, and the whole service life of the product is greatly influenced.
Disclosure of Invention
The invention aims to provide a combustible gas detector.
The technical problem solved by the invention is as follows: at present, the pump-suction combustible gas detection technology is used in underground well environments, a suction pump is subjected to high-humidity and high-corrosivity gas and is easy to malfunction, and in addition, a pump film is also easy to lose efficacy due to low temperature in northern low-temperature environments.
The purpose of the invention can be realized by the following technical scheme:
a combustible gas detector comprises a shell, a power supply module and a detection module.
The power supply module is arranged in the shell.
The detection module is installed in the shell. The detection module comprises an installation shell, a laser transmitter, a receiver, a temperature and pressure sensor and a control panel.
The mounting shell is located in the housing.
The laser emitter is arranged at one end of the mounting shell and used for emitting laser signals to the other end of the mounting shell.
The receiver sets up in the one end that the laser emitter was kept away from to the installation shell for receive laser signal.
The temperature and pressure sensor is arranged in the mounting shell and used for calibrating the compensation value of the methane concentration under different temperatures and atmospheric pressures.
The control panel sets up in the installation shell. The control panel is used for judging whether the laser signal transmitted by the laser transmitter is the same as the laser signal received by the receiver. If yes, determining that no combustible gas exists in the installation shell. Otherwise, the laser losses of the two laser signals are calculated firstly, and then the combustible gas concentration I is calculated according to a preset laser loss-combustible gas concentration table. And finally, combining the compensation value of the temperature and pressure sensor to obtain the final concentration value of the combustible gas.
As a further scheme of the invention: also included are a lifting ring and an antenna assembly.
The rings are mounted on the top of the shell.
An antenna assembly is mounted outside the housing for providing a signal.
Wherein, the antenna module is connected with the control panel through the communication line.
As a further scheme of the invention: the housing includes an upper housing and a lower housing. The upper shell and the lower shell are connected in a sealing way. An opening is arranged at one end of the upper shell close to the lower shell. Two ends of the lower shell are communicated. The detection module is installed in the lower shell.
As a further scheme of the invention: also comprises a fixed plate and a filter plate.
The fixed plate is fixedly arranged at one end of the lower shell close to the upper shell.
The filter plate is fixedly arranged in the lower shell, and an air chamber is formed between the filter plate and the fixing plate.
Wherein, detect the module and be located the air chamber.
As a further scheme of the invention: the detection module further comprises two carbon rods and two connectors.
Two carbon rods are arranged on the fixed plate at intervals. The one end that the fixed plate was kept away from to the carbon-point is located between filter and the lower casing bottom.
The two connectors are respectively arranged on the two carbon rods. The two connectors are electrically connected through a lead.
As a further scheme of the invention: the control board is also used for controlling the power supply module to apply a voltage level signal to one of the carbon rods and reading the voltage level signal of the other carbon rod. And judging whether the applied voltage level signal is the same as the read voltage level signal, if so, indicating that the electrode is conducted, and judging that the equipment is immersed, otherwise, judging that the equipment is not immersed.
The invention has the beneficial effects that:
by adopting the correlation laser methane sensor, the device can work efficiently and stably, the defects of a reflection type module are reduced, and the process flow is simplified. Meanwhile, the diffusion type underground well chamber detection mode reduces the number of key parts of the air suction type product, and greatly prolongs the service life of the product while ensuring the detection reliability of the product. The sealed cavity design can guarantee that equipment soaks and can not influence equipment and survey module bubble water and influence the detection performance. The NB-IoT wireless transmission can realize remote monitoring, discover the condition of environmental combustible gas leakage as soon as possible and avoid danger.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a view showing the appearance of the combustible gas detector of the present invention;
FIG. 2 is a schematic view of the internal structure of the combustible gas detector of the present invention;
FIG. 3 is a schematic structural diagram of a detection module according to the present invention;
fig. 4 is a schematic structural view of a water detecting assembly according to the present invention.
In the figure: 1. a hoisting ring; 2. an antenna assembly; 3. an upper housing; 4. an air chamber; 5. a lower housing; 6. a filter plate; 7. a water detection assembly; 8. a detection module; 9. a master control module; 10. a power supply module; 11. a laser transmitter; 12. mounting a shell; 13. a receiver; 14. a control panel; 15. a temperature and pressure sensor; 16. a waterproof connector; 17. a wire; 18. a joint; 19. a fixing plate; 20. a carbon rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention is a combustible gas detector, which includes a housing, a power supply module 10 and a detection module 8. The power supply module 10 and the detection module 8 are arranged in the housing. The combustible gas detector is mainly used for monitoring combustible gas in an underground well chamber, and particularly monitoring methane gas in the underground well chamber.
Wherein, detect module 8 including installation shell 12, laser emitter 11, receiver 13, warm pressure sensor 15 and control panel 14. Referring to fig. 3, the mounting housing 12 is located within the housing. The laser transmitter 11 is disposed at one end of the mounting case 12, and transmits a laser signal to the other end of the mounting case 12. A receiver 13 is disposed at an end of the mounting housing 12 remote from the laser transmitter 11 for receiving the laser signal. A temperature and pressure sensor 15 is provided in the mounting housing 12 for calibrating the compensation values for methane concentration at different temperatures and atmospheric pressures.
The control board 14 is disposed within the mounting housing 12. The control board 14 is used for determining whether the laser signal emitted by the laser emitter 11 is the same as the laser signal received by the receiver 13. If yes, it is determined that there is no combustible gas in the housing 12. Otherwise, the laser loss of the two laser signals is calculated, and then the combustible gas concentration I is calculated according to a preset laser loss-combustible gas concentration table. And finally, the final concentration value of the combustible gas is obtained by combining the compensation value of the temperature and pressure sensor 15. The preset laser loss-combustible gas concentration table is a conversion table set based on empirical values, and each laser loss value in the conversion table corresponds to a combustible gas concentration value.
It should be noted that, in the present invention, the detection module 8 sends a laser signal with a certain wavelength through the laser transmitter 11, the receiver 13 receives the laser signal, and has a certain absorption effect on the laser spectrum passing through the gas chamber 4 according to the absorption characteristic of methane gas to laser, if no methane gas exists in the gas chamber 4, the transmitted signal is equal to the received signal, and if a methane signal exists in the gas chamber 4, the methane concentration value in the gas is converted by calculating laser loss. The methane concentration value compensation under different temperatures and atmosphere can be effectively calibrated by the temperature and pressure sensor 15.
In the invention, the combustible gas detector also comprises a lifting ring 1 and an antenna component 2.
The lifting ring 1 is arranged on the top of the shell. The main application equipment is convenient for transportation, operation such as transport, installation, rings 1 demolishs after the installation is accomplished.
An antenna assembly 2 is mounted outside the housing for providing signals. The antenna provides signals for the device, including a GPS antenna, a bluetooth antenna, and an NB-IoT antenna, among others. The antenna assembly 2 is connected to the control board 14 through a communication line.
In one embodiment of the present invention, the housing may include an upper housing 3 and a lower housing 5. The upper shell 3 and the lower shell 5 are connected in a sealing way. An opening is provided at one end of the upper case 3 near the lower case 5. Both ends of the lower case 5 are penetrated. The detection module 8 is mounted in the lower case 5. The upper case 3 is a structural container for assembling the antenna and the battery module. The lower case 5 is a structural container for assembling the control board 14 and the detection module 8.
It should be noted that, when in use, the lower shell 5 is placed on the ground, so that a seal is formed between the shell and the ground, and it can be ensured that the equipment is not immersed by water due to the action of gas pressure in the cavity, thereby ensuring that the detection module 8 works normally.
In a further embodiment, a fixing plate 19 and a filter plate 6 may also be included. The fixing plate 19 is fixedly installed at one end of the lower case 5 near the upper case 3. The filter plate 6 is fixedly installed in the lower case 5, and forms an air chamber 4 with the fixing plate 19. Wherein the detection module 8 is located in the air chamber 4. Specifically, the mounting case 12 of the detection module 8 can be mounted on the fixing plate 19, and accordingly, the detection module 8 detects the methane concentration in the gas chamber 4.
It should be noted that the filter plate 6 is mainly used for removing dust, and prevents substances such as dust in the air from diffusing into the air chamber 4 to pollute the laser lens of the detection module 8, thereby causing measurement errors.
In a further embodiment, the detection module 8 may further include a water detection assembly 7, and referring to fig. 4, the water detection assembly 7 includes two carbon rods 20 and two joints 18. Two carbon rods 20 are mounted on the fixing plate 19 at intervals. The end of the carbon rod 20 away from the fixing plate 19 is located between the filter plate 6 and the bottom of the lower housing 5. Two connectors 18 are mounted on two carbon rods 20, respectively. The two terminals 18 are electrically connected by a wire 17. During detection, the control board 14 controls the power supply module 10 to apply a voltage level signal to one of the carbon rods 20, and reads a voltage level signal of the other carbon rod 20. And judging whether the applied voltage level signal is the same as the read voltage level signal, if so, indicating that the electrode is conducted, and judging that the equipment is soaked, otherwise, judging that the equipment is not soaked.
It should be noted that, in the present invention, the waterproof connector 16 is used at the connection of the wires 17. The control panel 14 of the invention collects and processes the data of the detection module 8, the equipment immersion state and other information, and sends the information to the server through the wireless NB-IoT network. The power supply module 10 of the invention supplies power to the equipment, and ensures that the long-term operation time of the equipment reaches more than 3 years. The lead 17 and the control board 14 of the present invention constitute a main control module 9.
The working principle of the invention is as follows: methane gas in the test environment diffuses into the gas chamber 4 through the filter screen, the detection module 8 detects gas in the gas chamber 4 and sends the concentration value of the detected combustible gas to the main control board, the control board 14 judges the concentration of the combustible gas, the water detection module 7 judges whether the equipment is immersed in water or not, and the judgment result is sent to the server through the NB-IoT network. The whole system adopts sealing treatment, so that the equipment can be ensured not to be immersed by water in the equipment air chamber 4 under the action of gas pressure in the cavity, and the normal work of the detection module 8 is ensured.
By adopting the correlation laser methane sensor, the invention can ensure that the equipment works efficiently and stably, simultaneously reduces the defects of the reflection type module and simplifies the process flow. Meanwhile, the diffusion type underground well chamber detection mode reduces the number of key parts of the air suction type product, and greatly prolongs the service life of the product while ensuring the detection reliability of the product. The sealed cavity design can guarantee that equipment soaks can not influence equipment and surveys 8 bubble waters of module and influence the detection performance. The NB-IoT wireless transmission can realize remote monitoring, discover the condition of environmental combustible gas leakage as soon as possible and avoid danger.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (6)
1. A combustible gas detector, comprising:
a housing;
a power supply module (10) disposed in the housing; and
a detection module (8) mounted within the housing; the detection module (8) comprises:
a mounting housing (12) located within the housing;
the laser emitter (11) is arranged at one end of the mounting shell (12) and is used for emitting laser signals to the other end of the mounting shell (12);
a receiver (13) arranged at one end of the mounting shell (12) far away from the laser transmitter (11) and used for receiving a laser signal;
a temperature and pressure sensor (15) disposed within the mounting housing (12) for calibrating compensation values for methane concentration at different temperatures and atmospheric pressures; and
a control panel (14) disposed within the mounting housing (12); the control board (14) is used for judging whether the laser signal transmitted by the laser transmitter (11) is the same as the laser signal received by the receiver (13); if yes, determining that no combustible gas exists in the installation shell (12); otherwise, calculating the laser loss of the two laser signals, and calculating the first combustible gas concentration according to a preset laser loss-combustible gas concentration table; and finally, the final combustible gas concentration value is obtained by combining the compensation value of the temperature and pressure sensor (15).
2. The combustible gas detector of claim 1, further comprising:
a hanging ring (1) mounted on the top of the shell; and
an antenna assembly (2) mounted outside the housing for providing a signal;
wherein the antenna assembly (2) is connected with the control board (14) through a communication line.
3. The combustible gas detector of claim 1, wherein the housing comprises an upper housing (3) and a lower housing (5); the upper shell (3) is connected with the lower shell (5) in a sealing way; an opening is formed in one end, close to the lower shell (5), of the upper shell (3); two ends of the lower shell (5) are communicated; the detection module (8) is arranged in the lower shell (5).
4. The combustible gas detector of claim 3, further comprising:
a fixing plate (19) fixedly mounted on one end of the lower housing (5) close to the upper housing (3); and
the filter plate (6) is fixedly arranged in the lower shell (5), and an air chamber (4) is formed between the filter plate and the fixing plate (19);
wherein the detection module (8) is positioned in the air chamber (4).
5. The combustible gas detector of claim 4, wherein the detection module (8) further comprises:
two carbon rods (20) which are arranged on the fixing plate (19) at intervals; one end of the carbon rod (20) far away from the fixing plate (19) is positioned between the filter plate (6) and the bottom of the lower shell (5); and
two joints (18) respectively mounted on two carbon rods (20); the two connectors (18) are electrically connected through a lead (17).
6. The combustible gas detector according to claim 5, wherein the control board (14) is further configured to control the power supply module (10) to apply a voltage level signal to one of the carbon rods (20) and read a voltage level signal of the other carbon rod (20); and judging whether the applied voltage level signal is the same as the read voltage level signal, if so, indicating that the electrode is conducted, and judging that the equipment is soaked, otherwise, judging that the equipment is not soaked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211536146.9A CN115931776A (en) | 2022-12-01 | 2022-12-01 | Combustible gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211536146.9A CN115931776A (en) | 2022-12-01 | 2022-12-01 | Combustible gas detector |
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| Publication Number | Publication Date |
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| CN115931776A true CN115931776A (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211536146.9A Pending CN115931776A (en) | 2022-12-01 | 2022-12-01 | Combustible gas detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117491314A (en) * | 2023-12-27 | 2024-02-02 | 金卡智能集团(杭州)有限公司 | Combustible gas detection device and detection method |
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2022
- 2022-12-01 CN CN202211536146.9A patent/CN115931776A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117491314A (en) * | 2023-12-27 | 2024-02-02 | 金卡智能集团(杭州)有限公司 | Combustible gas detection device and detection method |
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