CN211122637U - Poisonous and harmful gas detector - Google Patents
Poisonous and harmful gas detector Download PDFInfo
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- CN211122637U CN211122637U CN201921245848.5U CN201921245848U CN211122637U CN 211122637 U CN211122637 U CN 211122637U CN 201921245848 U CN201921245848 U CN 201921245848U CN 211122637 U CN211122637 U CN 211122637U
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Abstract
The utility model relates to a poisonous and harmful gas detector, including the detector shell, detector shell bottom surface is equipped with the base, and its top surface spiro union has the top cap the base is equipped with double-phase to setting up and the core line mouth that is linked together base one side is equipped with the sensor tubular metal resonator internally mounted has gas sensor install first circuit board and second circuit board in the detector shell, first circuit board and second circuit board set up about being and fix inside the detector shell through the copper post respectively, components and parts are all installed to first and second circuit board, and it is the DC power supply module respectively, conversion power module, gas sensor, MCU, driver chip, charactron, L ED, communication chip, WIFI module, the utility model discloses use WIFI and RS485 communication mode, the agreement is standard modBusRTU, can send corresponding instruction to this detector and accomplish corresponding operation including reading the data, calibration data, also can link with corresponding linkage alarm device, strengthens environmental monitoring's ageing.
Description
The technical field is as follows:
the utility model relates to a gas detector especially relates to a poisonous and harmful gas detector.
Background art:
with the development of society, the use of electric power is indispensable to our lives, and cable tunnels have inseparable connection with electricity. A cable tunnel is a corridor or tunnel-like structure that accommodates a large number of cables laid on cable supports. The cable tunnel can protect the cable better and facilitate the inspection and maintenance of the cable by people. However, in the cable tunnel, some gases which are toxic and harmful to human bodies are generated, and the human bodies are in the environment for a long time and even have life risks. For this reason, it is important to monitor the gas in the cable tunnel. The gas to be monitored in the cable tunnel is as follows: combustible gas, hydrogen sulfide, hydrogen, ammonia, sulfur hexafluoride, oxygen, carbon monoxide, sulfur dioxide, nitrogen oxide and the like, so that a toxic and harmful gas detector is required.
In the toxic and harmful gas detector in the prior art, the information transmission method is complex, a large amount of wiring is needed in the early stage, and the installation is complex. During calibration, certain hardware devices are needed for calibration, and some devices need to disassemble the shell, so that the operation is complex and the stability is poor. And only when the detection personnel are on site, the data can be checked, and the data can not be checked at any time and any place, so that the method has regional limitation.
The utility model has the following contents:
to the not enough of prior art, the utility model provides a poisonous and harmful gas detector.
In order to solve the technical problem, the utility model adopts the technical scheme that the detector for the poisonous and harmful gas comprises a detector shell, wherein the bottom surface of the detector shell is provided with a base, the top surface of the detector shell is screwed with a top cover, the base is provided with two oppositely arranged and communicated core wire ports, one side of the base is provided with a sensor metal tube, a gas sensor is arranged in the sensor metal tube, a first circuit board and a second circuit board are arranged in the detector shell, the first circuit board and the second circuit board are arranged up and down and are respectively fixed in the detector shell through copper columns, and the first circuit board and the second circuit board are both provided with components which are respectively a direct current power supply module, a conversion power supply module, a gas sensor, a MCU, a driving chip, a nixie tube, a L ED, a communication chip and a WIFI module;
the conversion power supply module includes:
the power supply comprises a first conversion power supply module and a second conversion power supply module;
the direct-current power supply module is electrically connected with a first conversion power supply module through a power line and converts a direct-current power supply 24V into a direct-current power supply 5V, the first conversion power supply module is electrically connected with a second conversion power supply module and converts the direct-current power supply 5V into a direct-current power supply 3.3V, the first power supply conversion module provides electric energy for the gas sensor, and the second power supply conversion module provides electric energy for the driving chip, the MCU and the communication chip;
MCU is connected with gas sensor, communication chip and WIFI module electricity respectively, MCU passes through the I/O interface and is connected with the driver chip electricity, driver chip still connects the charactron and L ED respectively the electricity.
Preferably, a top plate film panel is embedded on the top surface of the detector housing, and a transparent view port for nixie tube display and a plurality of small transparent view ports for L ED display are arranged on the top plate film panel.
Preferably, the core line mouth is used for passing power cord, ground wire and two 485AB lines, be equipped with the wire of being connected with the power cord on the first and the second circuit board, be equipped with on the first circuit board with charactron, L ED and gas sensor signal line wiring mouth, it is connected with charactron, L ED and gas sensor through the signal line respectively, the communication chip who installs on two 485AB lines and the second circuit board is connected.
Preferably, the copper column comprises a first copper column and a second copper column, the first copper column is M4 and 20mm in height, the second copper column is M4 and 18mm in height, and the second copper column is screwed on the first copper column.
Preferably, the nixie tubes are 4-position and 0.39 inch.
Preferably, the bottom surface of the top cap is threadably engaged to the top surface of the detector housing.
Preferably, transparent glass with a display function is embedded in the top cover, and a metal pressing ring with a waterproof sealing function is arranged below the transparent glass.
Preferably, the gas sensor includes a carbon monoxide gas transmitter, a methane gas transmitter, a sulfur hexafluoride transmitter, an oxygen gas transmitter, a hydrogen gas transmitter and a hydrogen sulfide gas transmitter.
Preferably, the MCU model is STM32F103RCT6, and the MCU has a USART function;
the model of the driving chip is 74HC 95;
the communication chip is RS485 in model.
Preferably, the system also comprises a plurality of computers and a router, wherein the computers are in communication connection with the communication chip through an RS485 bus;
the router is connected with the WIFI module through wireless signal communication.
The beneficial effects of the utility model are that this utility model can carry out the detection and analysis to methane, ammonia, nitrogen dioxide, hydrogen chloride, phosphine, sulfur dioxide, ozone, hydrogen fluoride, chlorine, carbon monoxide, oxygen, hydrogen sulfide, hydrogen, humiture concentration through the toxic gas detector, this application has the toxic gas detector of two kinds of models and each kind of detector only detects a gas, the detection mode of this gas detector is the electrochemistry formula, wherein, methane is the infrared formula, the scope that corresponds the detected gas is wider, the linearity is good, the error is less and difficult to produce the drift;
this application uses WIFI communication and RS485 communication mode, and the agreement is standard modBusRTU agreement, can send corresponding instruction to this detector and accomplish corresponding operation, if read data, calibration data etc. also can link with corresponding linkage alarm device, strengthens environmental monitoring's ageing nature.
Drawings
The following description is made in detail by way of example with reference to the accompanying drawings.
Fig. 1-2 are block diagrams of a toxic and harmful gas detector.
Fig. 3 is a schematic view of the top cover structure.
Fig. 4 is a schematic cross-sectional view of the top cover of fig. 3.
Fig. 5 is an electrical connection diagram of a toxic and harmful gas detector.
In the figure, a detector shell 1, a sensor metal tube 10, a base 11, a fixing plate 12, bolt holes 13, a core wire port 14, a top plate membrane panel 15, a transparent view port 16, a transparent small view port 17, a first circuit board 18, a second circuit board 19, a direct current power supply module 20, a first conversion power supply module 21, a second conversion power supply module 22, a gas sensor 24, an MCU25, an I/O interface 26, a driving chip 27, a nixie tube 28, a L ED29, a communication chip 30, a WIFI module 31, an I/O interface 32, a computer 4, a router 41, a linkage alarm device 42, a top cover 5, transparent glass 51, a metal pressing ring 52, a first copper column 61, a second copper column 62 and bolts 63.
Detailed Description
Referring to the attached drawings 1-5, a poisonous and harmful gas detector comprises a detector body and a detector shell 1, wherein a base 11 is arranged on the bottom surface of the detector shell 1, as shown in fig. 1, a fixing plate 12 with bolt holes 13 is arranged on the periphery of the base 11 and can be fixed through bolts, a top plate film panel 15 is embedded on the top surface of the detector shell 1, a transparent view port 16 for nixie tube display and a plurality of small transparent view ports 17 for L ED display are arranged on the top plate film panel 15, the small transparent view ports are distributed on one side and below the transparent view port respectively and are uniformly distributed, characters are printed on the small transparent view ports arranged on one side and below the transparent view port, and display is more visual.
As shown in fig. 3-4, a top cover 5 is screwed on the top surface of the detector housing 1, the bottom surface of the top cover 5 is screwed on the top surface of the detector housing 1, a transparent glass 51 with a display function is embedded in the top cover 5, a metal pressing ring 52 with a waterproof sealing function is arranged below the transparent glass 51, as shown in fig. 1-2, two core wire ports 14 are oppositely arranged on the base 11, the core wire ports 14 are used for passing a power line, a ground line and two 485AB lines, a sensor metal tube 10 is arranged on one side of the base 1, and a gas sensor 24 is arranged in the sensor metal tube 10;
the detector comprises a detector shell 1, a first circuit board 18 and a second circuit board 19 are installed in the detector shell 1, a nixie tube and a driving chip are installed on the first circuit board, a direct-current power supply module, a conversion power supply module, a gas sensor, an MCU (microprogrammed control unit), a communication chip and a WIFI (wireless fidelity) module are installed on the second circuit board, the first circuit board and the second circuit board are respectively fixed inside the detector shell 1 through copper columns, each copper column comprises a first copper column 61 and a second copper column 62, threads (not shown) are arranged on the bottom surface of the first copper column 61, and an internal thread opening (not shown) is formed in the top surface of the second copper column 62, so that when the first circuit board and the second circuit board are fixedly inserted into the first copper column and the second copper column, the first copper column is screwed onto the second copper column, the second copper column is fixed inside the detector shell through bolts 63, the first copper column is M4 in height, the copper column is 20mm, the copper column is M4 in the copper column second copper column is in the M4 in height, the copper column is screwed onto the copper column onto the first circuit board, the first circuit board and the second circuit board are respectively provided with direct-current power supply module 20, the gas conversion power supply module, the gas sensor, the second circuit board, the drive chip is connected with the LED drive chip, the LED drive chip is connected with the LED drive chip, the LED drive chip is connected with the LED drive chip through the ED 2.
The conversion power supply module includes:
a first switching power supply module 21 and a second switching power supply module 22;
the direct current power supply module 20 is electrically connected with a first conversion power supply module 21 through a power line, and converts a direct current power supply 24V into a direct current power supply 5V, the first conversion power supply module 21 is electrically connected with a second power supply conversion module 22, and converts the direct current power supply 5V into a direct current power supply 3.3V, the first power supply conversion module 21 provides electric energy for the gas sensor, and the second power supply conversion module 22 provides electric energy for the driving chip 27, the MCU25 and the communication chip 30;
the MCU25 is respectively and electrically connected with the gas sensor 24, the communication chip 30 and the WIFI module 31, the MCU25 is electrically connected with the driving chip 27 through an I/O interface, the driving chip 27 is also respectively and electrically connected with the nixie tube 28 and the L ED29, the MCU controls and processes signals, and the MCU can also be electrically connected with an alarm linkage device through an I/O interface to alarm for gas signals which cannot be identified, wherein the model of the driving chip in the embodiment is 74HC 95;
the gas sensor 24 in the present embodiment includes:
the device comprises a carbon monoxide gas transmitter, a methane gas transmitter, a sulfur hexafluoride transmitter, an oxygen gas transmitter, a hydrogen gas transmitter and a hydrogen sulfide gas transmitter. The toxic gas detector in the embodiment is provided with two product models, namely an ExdII CT6 explosion-proof detection model infrared detector and an ExdII CT3 explosion-proof detection model electrochemistry detector, so that the models of the adopted gas sensors are different.
The gas sensor in the infrared of ExdII CT6 explosion-proof detection model comprises a carbon monoxide gas transmitter with model number JC-GS100-CO, a methane gas transmitter with model number JC-GS100-CH4, a sulfur hexafluoride transmitter with model number JC-GS100-SF6, an oxygen gas transmitter with model number JC-GS100-O2, a hydrogen gas transmitter with model number JC-GS100-H2 and a hydrogen sulfide gas transmitter with model number JC-GS 100-H2S;
the ExdII CT3 type gas sensor in the explosion-proof detection type electrochemistry comprises a carbon monoxide gas transmitter with the model of JC-GS200-CO, a methane gas transmitter with the model of JC-GS200-HF, a sulfur hexafluoride transmitter with the model of JC-GS200-SF6, an oxygen gas transmitter with the model of JC-GS200-O2, a hydrogen gas transmitter with the model of JC-GS200-H2 and a hydrogen sulfide gas transmitter with the model of JC-GS 200-H2S.
The system also comprises a plurality of computers 4 and a router 41, which are represented by PC1, PC2 and PC3.. in the figure, wherein the computers 4 are in communication connection with the communication chip 30 through RS485 buses; the model of the communication chip 30 is RS 485.
The router 41 is connected with the WIFI module 31 and the plurality of computers 4 through wireless signal communication, so that gas detection signals are transmitted;
the gas detector is used, after the detector is powered on, the MCU drives all parts to operate after operating, and comprises a gas sensor, a UART, an RS485, a WIFI module, an alarm linkage device and a display part to operate in a driving mode.
The WIFI communication mode that this application's advantage lies in that the WIFI communication mode that it provided, this poisonous and harmful gas detector carries out corresponding setting after last electricity, and this equipment will be automatically connected to in the WIFI LAN of pre-connection, also be exactly under the condition that this WIFI signal covers, as the server side in this WIFI LAN, use distributed IP address, open a port that sets up to supply external equipment to establish TCP with this equipment through this LAN to be connected, the data of inquiry detection or carry out online calibration. Therefore, during actual operation, only one device capable of being connected to the WIFI local area network is needed, the device can be accessed under the WIFI local area network, and the device can be accessed after the local area network is accessed through an external network. The data can be checked without the need of detection personnel going to the site, so that the detection difficulty is greatly reduced, and the toxic gas damage to the detection personnel in the tunnel is also avoided. Of course, the intelligent detector also provides an RS485 interface, and data can be viewed through the RS485 port.
Because of the feasibility of wireless WIFI communication, the scheme also provides an online calibration mode, namely, the detection data volume is calibrated online through a WIFI network, namely RS485, in a ModBusRTU protocol, namely, a linear calibration mode. The shell does not need to be disassembled, and a calibration device does not need to be added. Simple, reliable and good in stability.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (10)
1. The poisonous and harmful gas detector is characterized by comprising a detector shell, wherein the bottom surface of the detector shell is provided with a base, the top surface of the detector shell is in threaded connection with a top cover, the base is provided with two oppositely-arranged and communicated core wire ports, one side of the base is provided with a sensor metal tube, a gas sensor is arranged in the sensor metal tube, a first circuit board and a second circuit board are arranged in the detector shell, the first circuit board and the second circuit board are vertically arranged and are respectively fixed in the detector shell through copper columns, the first circuit board and the second circuit board are respectively provided with components which are respectively a direct current power supply module, a conversion power supply module, a gas sensor, an MCU (microprogrammed control unit), a driving chip, a nixie tube, L ED, a communication chip and a WIFI module, the nixie tube, L ED and the driving chip are arranged on the first circuit board, and the direct current power supply module, the conversion power supply module, the gas sensor, the MCU;
the conversion power supply module includes:
the power supply comprises a first conversion power supply module and a second conversion power supply module;
the direct-current power supply module is electrically connected with a first conversion power supply module through a power line, and converts a direct-current power supply 24V into a direct-current power supply 5V, the first conversion power supply module is electrically connected with a second conversion power supply module, and converts the direct-current power supply 5V into a direct-current power supply 3.3V, the first conversion power supply module provides electric energy for the gas sensor, the second conversion power supply module provides electric energy for the driving chip, the MCU and the communication chip;
MCU is connected with gas sensor, communication chip and WIFI module electricity respectively, MCU passes through the I/O interface and is connected with the driver chip electricity, driver chip still connects the charactron and L ED respectively the electricity.
2. The toxic and harmful gas detector of claim 1, wherein a top plate film panel is embedded in the top surface of the detector housing, and a transparent view port for nixie tube display and a plurality of small transparent view ports for L ED display are provided on the top plate film panel.
3. The poisonous and harmful gas detector of claim 1, wherein the core wire port is used for passing a power wire, a ground wire and two 485AB wires, the first and second circuit boards are provided with wires connected with the power wire, the first circuit board is provided with wiring ports connected with the nixie tube, L ED and the gas sensor signal wires, and the wiring ports are respectively connected with the nixie tube, L ED and the gas sensor through signal wires, and the two 485AB wires are connected with the communication chip mounted on the second circuit board.
4. The poisonous and harmful gas detector of claim 1, wherein the copper pillars include a first copper pillar and a second copper pillar, the first copper pillar is M4 and has a height of 20mm, the second copper pillar is M4 and has a height of 18mm, and the second copper pillar is screwed to the first copper pillar.
5. The toxic or harmful gas detector of claim 1, wherein the nixie tube is 4-position 0.39 inch.
6. The toxic gas detector of claim 1, wherein the bottom surface of the top cap is threadably engaged with the top surface of the detector housing.
7. The poisonous and harmful gas detector as claimed in claim 1, wherein a transparent glass with a display function is embedded inside the top cover, and a metal pressing ring with a waterproof sealing function is provided under the transparent glass.
8. The toxic and harmful gas detector of claim 1, wherein the gas sensor includes a carbon monoxide gas transmitter, a methane gas transmitter, a sulfur hexafluoride transmitter, an oxygen gas transmitter, a hydrogen gas transmitter, and a hydrogen sulfide gas transmitter.
9. The toxic and harmful gas detector of claim 1, wherein the MCU is of the model STM32F103RCT6, wherein the MCU has USART function;
the model of the driving chip is 74HC 95;
the communication chip is RS485 in model.
10. The poisonous and harmful gas detector of claim 1, further comprising a plurality of computers and routers, wherein the computers are communicatively connected to the communication chip via an RS485 bus;
the router is connected with the WIFI module through wireless signal communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921245848.5U CN211122637U (en) | 2019-08-03 | 2019-08-03 | Poisonous and harmful gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921245848.5U CN211122637U (en) | 2019-08-03 | 2019-08-03 | Poisonous and harmful gas detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211122637U true CN211122637U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921245848.5U Active CN211122637U (en) | 2019-08-03 | 2019-08-03 | Poisonous and harmful gas detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211122637U (en) |
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2019
- 2019-08-03 CN CN201921245848.5U patent/CN211122637U/en active Active
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