CN114755070A - Online detection device and method for intelligent natural gas odorizing agent - Google Patents
Online detection device and method for intelligent natural gas odorizing agent Download PDFInfo
- Publication number
- CN114755070A CN114755070A CN202210534062.5A CN202210534062A CN114755070A CN 114755070 A CN114755070 A CN 114755070A CN 202210534062 A CN202210534062 A CN 202210534062A CN 114755070 A CN114755070 A CN 114755070A
- Authority
- CN
- China
- Prior art keywords
- detection
- box
- air
- natural gas
- odorizing agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses on-line detection equipment and a detection method for intelligent natural gas odorizing agent, which comprises a protection box, wherein an observation window is arranged on the front surface of the protection box, a display panel is arranged in the protection box at a position close to the observation window, a control module is arranged on one side of the display panel, a detection box for detecting gas is arranged on one side of the control module, a storage battery is arranged on the upper surface of the detection box, an exhaust mechanism for exhausting the detection gas and an air exhaust mechanism for extracting the detection gas are arranged at the bottom of the detection box, a sealing cover is arranged at the bottom of the protection box, and a solar panel for charging the storage battery is arranged at the top of the protection box; the detection equipment of the intelligent natural gas odorizing agent online detection equipment and the detection method is high in automation degree, high in efficiency and timely in detection gas, capable of setting sampling detection time according to requirements, capable of carrying out detection regularly and continuously, capable of carrying out early warning, free of the need of special detection of workers, capable of saving manpower and material resources and convenient to use.
Description
Technical Field
The invention relates to the technical field of natural gas detection, in particular to intelligent natural gas odorizing agent online detection equipment and a detection method.
Background
The use of odorant has played crucial effect in the aspect of natural gas safety, the detection means that the natural gas leaked has also been increased simultaneously, however whether discern to the natural gas composition or through odorant, all need on-the-spot sampling or go to discernment etc. by people's sense of smell, but on-the-spot sampling is wasted time and energy, also influence staff's health and safety simultaneously, and odorant because of its inherent nature, also there is obvious individual difference through sense of smell judgement, can't carry out long-time continuation detection and timely early warning, bring very big hidden danger for enterprise and family property safety.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides the on-line detection equipment and the detection method for the natural gas intelligent odorizing agent.
In order to realize the purpose, the technical scheme of the invention is as follows: the utility model provides a natural gas intelligence odorant on-line measuring equipment, includes the guard box, the observation window has been seted up in the front of guard box, the position that the inside of guard box is close to the observation window is provided with display panel, one side of display panel is provided with the control module group, one side of control module group is provided with the detection case of testing gas, the upper surface of detection case is provided with the battery, the bottom of detection case is provided with the exhaust mechanism of discharge testing gas and the mechanism of bleeding of extraction testing gas, the bottom of guard box is provided with sealed lid, the top of guard box is provided with the solar panel that charges to the battery.
Preferably, T shape recess has been seted up at the back of guard box, the guard box is provided with the mounting bracket through T shape recess, the threaded hole has all been seted up in four corners department of mounting bracket, the front of mounting bracket be provided with the locating piece of T shape recess looks adaptation.
Preferably, the display panel is electrically connected with the control module, the control module is electrically connected with the storage battery, and the control module is electrically connected with the exhaust mechanism and the air exhaust mechanism respectively.
Preferably, one side of battery is provided with the wireless communication module that can long-range wireless connection, the antenna of wireless communication module passes the guard box and extends to the outside, the antenna setting of wireless communication module is in solar panel's below, wireless communication module and control module electric connection.
Preferably, the lower surface of guard box is provided with the control button, the control button passes the guard box and with control module electric connection, the control button sets up the one side at sealed lid.
Preferably, the detection case includes the box, the inner wall of box is provided with odorizing agent detector, odorizing agent detector and control module group electric connection, exhaust mechanism and air exhaust mechanism all set up the bottom at the box.
Preferably, the exhaust mechanism comprises an exhaust pipe and an air suction pipe which are symmetrically arranged, one end of the exhaust pipe and one end of the air suction pipe penetrate through the box body and extend to the outside of the protection box, insect-proof nets are arranged at two ends of the exhaust pipe and two ends of the air suction pipe, first electromagnetic valves are arranged on the exhaust pipe and the air suction pipe, and a first air pump is further arranged on the air suction pipe.
Preferably, the air exhaust mechanism comprises an air exhaust pipe, one end of the air exhaust pipe penetrates through the box body and extends to the outside of the protection box, and a second air pump and a second electromagnetic valve are sequentially arranged on the air exhaust pipe.
A detection method of intelligent natural gas odorizing agent online detection equipment comprises the following steps:
the method comprises the following steps: installing an installation frame outdoors close to the detection pipeline, then installing a protection box, communicating an exhaust pipe with the detection pipeline, and performing sealing inspection and treatment at the connection part;
step two: through cell-phone or panel computer wireless connection equipment to check whether equipment has the anomaly:
step three: starting a second air pump and a second electromagnetic valve through a wireless control or control key, simultaneously opening the first electromagnetic valve to enable the extracted air to discharge the air in the detection box, closing the first electromagnetic valve after 5-10min to enable the second air pump to continuously extract the air, and after the duration of min, firstly closing the second air pump and then closing the second electromagnetic valve;
step four: the odorizing agent detector in the detection box is fully contacted with the extracted gas, and can display detection data on the display panel after multiple measurements and send the data to the connecting equipment through the wireless communication module;
step five: after the detection is finished, the first electromagnetic valve and the first air pump are opened, meanwhile, the second electromagnetic valve is in a closed state, the first air pump sucks external air, and the air in the detection box is discharged outwards from the exhaust pipe.
Compared with the prior art, the invention has the following beneficial effects:
1. the protection box is installed outdoors, has good waterproof performance, is powered by the solar panel, is energy-saving and environment-friendly, can extract detection gas into the detection box for detection by connecting the gas extraction mechanism with a gas pipeline, then can remotely send information by processing through the control module and the wireless communication module, and can directly feed data back to a natural gas company for quick inspection or maintenance;
2. the detection equipment provided by the invention has the advantages that the automation degree is high, the gas detection is efficient and timely, the sampling detection time can be set according to the requirement, the detection can be carried out periodically and continuously, the early warning can be carried out, the special detection of workers is not needed, the manpower and material resources are saved, and the use is convenient.
Drawings
Fig. 1 is a schematic diagram of an intelligent natural gas odorizing agent online detection device according to the present invention.
Fig. 2 is a sectional view of an intelligent natural gas odorizing agent on-line detection device according to the present invention.
Fig. 3 is a top view of the protective case of the present invention.
Fig. 4 is a schematic view of the inventive mount.
FIG. 5 is a cross-sectional view of the detection box of the present invention.
In the figure: 1. a protection box; 11. an observation window; 12. a T-shaped groove; 13. a mounting frame; 14. positioning blocks; 2. a display panel; 3. a control module; 31. a wireless communication module; 32. a control key; 4. a detection box; 41. a box body; 42. an odorizing agent detector; 5. a storage battery; 6. an exhaust mechanism; 61. an exhaust pipe; 62. an air intake duct; 63. an insect-proof net; 64. a first solenoid valve; 65. a first air pump; 7. an air extraction mechanism; 71. an air exhaust pipe; 72. a second air pump; 73. a second solenoid valve; 8. a sealing cover; 9. a solar panel.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Please refer to fig. 1-5, a natural gas intelligence odorant on-line measuring equipment, including guard box 1, observation window 11 has been seted up in guard box 1's front, the position that the inside of guard box 1 is close to observation window 11 is provided with display panel 2, one side of display panel 2 is provided with control module 3, one side of control module 3 is provided with the detection case 4 of testing gas, the upper surface of detection case 4 is provided with battery 5, the bottom of detection case 4 is provided with exhaust mechanism 6 and the air exhaust mechanism 7 of extraction testing gas of exhaust testing gas, the bottom of guard box 1 is provided with sealed lid 8, the top of guard box 1 is provided with the solar panel 9 that charges to battery 5. Equipment integral erection is outdoor, and it has sun one side to aim at solar panel 9, because air exhaust mechanism 7 need extract the natural gas and detect in detection case 4, has great potential safety hazard to need the exhaust, need be with equipment fixing in the open air, if the house inner space is great and ventilate better, can pull down solar panel 9, equipment connecting circuit supplies power, can be with equipment fixing in the house. Two pipelines of the exhaust mechanism 6 and a pipeline of the air exhaust mechanism 7 are arranged at the bottom of the protection box 1, water can be prevented from entering the protection box, the outdoor rain is prevented from damaging equipment, the sealing cover 8 is also arranged at the bottom, and the side face of the protection box 1 is sealed. According to actual requirements, a solar controller can be arranged on the storage battery 5, so that charging damage is avoided.
One side of battery 5 is provided with wireless communication module 31 that can long-range wireless connection, wireless communication module 31's antenna passes guard box 1 and extends to the outside, wireless communication module 31's antenna setting is in solar panel 9's below, wireless communication module 31 and control module 3 electric connection. The wireless communication module 31 can use a 4G communication module, can be remotely controlled and connected through a network, can send information and alarm to a connected terminal, and can also control the on-off of equipment through the connected terminal. Guard box 1 is the metal material, and the antenna need avoid sheltering from the signal in guard box 1's outside, and the antenna setting can keep off the rain through solar panel 9 in solar panel 9's below, if install indoor or do not have wireless network to cover, can use through net twine port connection net twine.
The lower surface of guard box 1 is provided with control button 32, control button 32 passes guard box 1 and with control module 3 electric connection, control button 32 sets up the one side at sealed lid 8. The control key 32 and the sealing cover 8 are arranged on the lower surface of the protective box 1, so that good waterproof protection can be achieved, the control key 32 can directly control equipment, and the equipment can be used for field detection or used when remote detection cannot be achieved.
The detection box 4 includes a box 41, the inner wall of the box 41 is provided with an odorizing agent detector 42, the odorizing agent detector 42 is electrically connected with the control module 3, and the exhaust mechanism 6 and the air exhaust mechanism 7 are both arranged at the bottom of the box 41. The box 41 is preferably made of glass or anticorrosive material to prevent corrosion, the odorizing agent detector 42 is installed inside the box 41, the detection end of the odorizing agent detector 42 needs to be located at the middle position of the box 41, the exhaust mechanism 6 and the air exhaust mechanism 7 are both installed at the bottom of the box 41, and the pipelines are both vertically downward. The exhaust mechanism 6 and the air exhaust mechanism 7 can be downward to better avoid rain and prevent water from entering.
The exhaust mechanism 6 comprises an exhaust pipe 61 and an air suction pipe 62 which are symmetrically arranged, one end of the exhaust pipe 61 and one end of the air suction pipe 62 both penetrate through the box body 41 and extend to the outside of the protection box 1, insect-proof nets 63 are arranged at both ends of the exhaust pipe 61 and the air suction pipe 62, first electromagnetic valves 64 are arranged on the exhaust pipe 61 and the air suction pipe 62, and a first air pump 65 is further arranged on the air suction pipe 62. The exhaust pipe 61 and the suction pipe 62 are communicated with the outside of the protection box 1 from the box body 41 and are downward, insect-proof nets 63 are arranged at two ends of the exhaust pipe 61 and the suction pipe 62 to prevent insects or other objects from entering, a first air pump 65 is arranged on the suction pipe 62, when a first electromagnetic valve 64 on the exhaust pipe 61 and the suction pipe 62 is opened, the suction pipe 62 sucks air into the inside through the first air pump 65, the air can be discharged from the exhaust pipe 61, and the detection gas in the box body 41 is replaced to discharge the detection gas. When the exhaust mechanism 6 is operated, the suction mechanism 7 is stopped.
The air pumping mechanism 7 comprises an air pumping pipe 71, one end of the air pumping pipe 71 penetrates through the box body 41 and extends to the outside of the protection box 1, and a second air pump 72 and a second electromagnetic valve 73 are sequentially arranged on the air pumping pipe 71. The air pumping pipe 71 can be connected with a natural gas pipeline, the second air pump 72 can directly pump the gas in the natural gas pipeline into the box body 41, when the gas is not detected, the second electromagnetic valve 73 is not closed, and when the air exhaust mechanism 6 works, the air pumping mechanism 7 stops working, and the second electromagnetic valve 73 is also closed.
A detection method of intelligent natural gas odorizing agent online detection equipment comprises the following steps:
the method comprises the following steps: install mounting bracket 13 in the open air that is nearer apart from the detection pipeline, then install guard box 1, with exhaust tube 71 and detection pipeline intercommunication, and the junction does sealed inspection and handles.
Step two: and wirelessly connecting the equipment through a mobile phone or a tablet computer, and checking whether the equipment is abnormal or not.
Step three: the second air pump 72 and the second electromagnetic valve 73 are started through the wireless control or control key 32, the first electromagnetic valve 64 is opened at the same time, the air in the detection box 4 is exhausted by the pumped air, after 5-10min, the first electromagnetic valve 64 is closed, the second air pump 72 continues to pump the air, and after 2min, the second air pump 72 is closed first and then the second electromagnetic valve 73 is closed.
Step four: the odorizing agent detector 42 inside the detection box 4 is sufficiently in contact with the extracted gas, and through a plurality of measurements, will display detection data on the display panel 2, and send the data to the connection device through the wireless communication module 31.
Step five: after the detection is completed, the first electromagnetic valve 64 and the first air pump 65 are opened, and at the same time, the second electromagnetic valve 73 is closed, and the first air pump 65 sucks the outside air to discharge the gas inside the detection box 4 from the exhaust pipe 61 to the outside.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. The utility model provides a natural gas intelligence odorant on-line measuring equipment, includes guard box (1), its characterized in that: observation window (11) have been seted up in the front of guard box (1), the position that the inside of guard box (1) is close to observation window (11) is provided with display panel (2), one side of display panel (2) is provided with control module (3), one side of control module (3) is provided with detection case (4) of detecting gas, the upper surface of detection case (4) is provided with battery (5), the bottom of detection case (4) is provided with exhaust mechanism (6) and extraction mechanism (7) of detecting gas of discharging, the bottom of guard box (1) is provided with sealed lid (8), the top of guard box (1) is provided with solar panel (9) that charge to battery (5).
2. The on-line natural gas intelligent odorizing agent detection device according to claim 1, characterized in that: t shape recess (12) have been seted up at the back of guard box (1), guard box (1) is provided with mounting bracket (13) through T shape recess (12), threaded hole has all been seted up in the four corners department of mounting bracket (13), the front of mounting bracket (13) is provided with locating piece (14) with T shape recess (12) looks adaptation.
3. The on-line natural gas intelligent odorizing agent detection device according to claim 1, characterized in that: display panel (2) and control module group (3) electric connection, control module group (3) and battery (5) electric connection, control module group (3) respectively with exhaust mechanism (6) and air exhaust mechanism (7) electric connection.
4. The on-line natural gas intelligent odorizing agent detecting device according to claim 3, wherein: one side of battery (5) is provided with wireless communication module (31) that can long-range wireless connection, the antenna of wireless communication module (31) passes guard box (1) and extends to the outside, the antenna setting of wireless communication module (31) is in the below of solar panel (9), wireless communication module (31) and control module (3) electric connection.
5. The on-line natural gas intelligent odorizing agent detecting device according to claim 3, wherein: the lower surface of guard box (1) is provided with control button (32), control button (32) pass guard box (1) and with control module group (3) electric connection, control button (32) set up the one side at sealed lid (8).
6. The on-line natural gas odorizing agent detecting device according to claim 1, characterized in that: the detection case (4) includes box (41), the inner wall of box (41) is provided with odorizing agent detector (42), odorizing agent detector (42) and control module (3) electric connection, exhaust mechanism (6) and air exhaust mechanism (7) all set up the bottom at box (41).
7. The on-line natural gas intelligent odorizing agent detection device according to claim 6, wherein: exhaust mechanism (6) are including symmetrical blast pipe (61) and breathing pipe (62) that set up, the one end of blast pipe (61) and breathing pipe (62) all passes box (41) and extends to the outside of guard box (1), the both ends of blast pipe (61) and breathing pipe (62) all are provided with insect-proof net (63), all be provided with first solenoid valve (64) on blast pipe (61) and breathing pipe (62), still be provided with first air pump (65) on breathing pipe (62).
8. The on-line natural gas intelligent odorizing agent detecting device according to claim 6, wherein: the air exhaust mechanism (7) comprises an air exhaust pipe (71), one end of the air exhaust pipe (71) penetrates through the box body (41) and extends to the outside of the protection box (1), and a second air pump (72) and a second electromagnetic valve (73) are sequentially arranged on the air exhaust pipe (71).
9. The detection method of the on-line natural gas intelligent odorizing agent detection device according to any one of claims 1 to 8, wherein: the method comprises the following steps:
the method comprises the following steps: the mounting frame (13) is mounted outdoors close to the detection pipeline, then the protection box (1) is mounted, the exhaust pipe (71) is communicated with the detection pipeline, and the connection part is subjected to sealing inspection and treatment;
step two: through cell-phone or panel computer wireless connection equipment to check whether equipment has the anomaly:
step three: starting a second air pump (72) and a second electromagnetic valve (73) through a wireless control or control key (32), simultaneously opening a first electromagnetic valve (64) to enable the extracted air to discharge the air in the detection box (4), closing the first electromagnetic valve (64) after 5-10min to enable the second air pump (72) to continue to extract the air, and closing the second air pump (72) and then closing the second electromagnetic valve (73) after 2 min;
step four: an odorizing agent detector (42) in the detection box (4) is fully contacted with the extracted gas, and can display detection data on the display panel (2) after multiple measurements and send the data to the connecting equipment through a wireless communication module (31);
step five: after the detection is finished, the first electromagnetic valve (64) and the first air pump (65) are opened, meanwhile, the second electromagnetic valve (73) is in a closed state, the first air pump (65) sucks external air, and gas in the detection box (4) is discharged outwards from the exhaust pipe (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210534062.5A CN114755070A (en) | 2022-05-17 | 2022-05-17 | Online detection device and method for intelligent natural gas odorizing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210534062.5A CN114755070A (en) | 2022-05-17 | 2022-05-17 | Online detection device and method for intelligent natural gas odorizing agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114755070A true CN114755070A (en) | 2022-07-15 |
Family
ID=82336007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210534062.5A Pending CN114755070A (en) | 2022-05-17 | 2022-05-17 | Online detection device and method for intelligent natural gas odorizing agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114755070A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117288916A (en) * | 2023-11-24 | 2023-12-26 | 四川兆雪科技有限公司 | High-precision detection device and method for online detection of natural gas odorizing agent concentration |
-
2022
- 2022-05-17 CN CN202210534062.5A patent/CN114755070A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117288916A (en) * | 2023-11-24 | 2023-12-26 | 四川兆雪科技有限公司 | High-precision detection device and method for online detection of natural gas odorizing agent concentration |
| CN117288916B (en) * | 2023-11-24 | 2024-01-26 | 四川兆雪科技有限公司 | High-precision detection device and method for online detection of natural gas odorizing agent concentration |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114755070A (en) | Online detection device and method for intelligent natural gas odorizing agent | |
| CN207763744U (en) | A kind of novel agricultural environmental protection tests device | |
| CN217505350U (en) | Natural gas intelligence odorant on-line measuring equipment | |
| CN211238938U (en) | Ring main unit with monitoring function | |
| CN113719216A (en) | Kitchen casement window with emergency ventilation function and method | |
| CN205944824U (en) | Waterproof box | |
| CN108525178A (en) | A kind of multipurpose extinguishing device and its working method | |
| CN208018002U (en) | A kind of fire box of rain-proof dust-proof | |
| CN207216821U (en) | A kind of fire-fighting early warning monitoring intelligent management system based on internet | |
| CN114336370A (en) | Park energy-saving management equipment based on digital platform | |
| CN212460755U (en) | Campus fire detection and alarm device based on wireless network | |
| CN210225989U (en) | Regional gas pressure regulating cabinet | |
| CN214786322U (en) | Intelligent integrated water supply equipment | |
| CN210273192U (en) | Secondary full-automatic outdoor moisture removing device with moisture removing box for GIS (gas insulated switchgear) equipment of transformer substation | |
| CN210246047U (en) | Intelligent outdoor moisture dispeller for secondary cabinet of transformer substation | |
| CN210273190U (en) | Transformer substation GIS current transformer secondary moisture-removing box with moisture-removing box | |
| CN210744522U (en) | Secondary moisture removing box for current transformer of transformer substation | |
| CN207753328U (en) | A kind of power equipment case | |
| CN202850536U (en) | Intelligent unattended machine room | |
| CN206471711U (en) | A kind of distribution box | |
| CN204879461U (en) | A wireless sensing device and system for $monitoring oil depot fuel leaks | |
| CN218771243U (en) | Cable branch box with automatic temperature control function | |
| CN212256530U (en) | Energy-saving intelligent fire detector | |
| CN212936359U (en) | Embedded fire early warning device for coal mine | |
| CN217062254U (en) | Automatic protection system of lithium battery energy storage cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |