CN112449521A - Mining multifunctional base station - Google Patents
Mining multifunctional base station Download PDFInfo
- Publication number
- CN112449521A CN112449521A CN201910829412.9A CN201910829412A CN112449521A CN 112449521 A CN112449521 A CN 112449521A CN 201910829412 A CN201910829412 A CN 201910829412A CN 112449521 A CN112449521 A CN 112449521A
- Authority
- CN
- China
- Prior art keywords
- base station
- exchanger
- interfaces
- shell
- kilomega
- 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.)
- Granted
Links
- 238000005065 mining Methods 0.000 title claims abstract description 25
- 239000013307 optical fiber Substances 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 8
- 239000003063 flame retardant Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0017—Casings, cabinets or drawers for electric apparatus with operator interface units
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0247—Electrical details of casings, e.g. terminals, passages for cables or wiring
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Support Of Aerials (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a mining multifunctional base station, which relates to the technical field of mining communication equipment and comprises a flame-proof shell and a base station, wherein the flame-proof shell is simple in structure and can be completely isolated from the outside, the base station comprises an exchanger and a functional module, the exchanger is the core of the base station and is divided into a kilomega exchanger and a kilomega exchanger, the base station containing the kilomega exchanger is connected with various underground terminal equipment through a network cable, a plurality of base stations containing the kilomega exchanger are connected to the base station containing the kilomega exchanger through optical fibers, the base station containing the kilomega exchanger is connected with a ground centralized control center through the optical fibers, the functional module is connected with the exchanger through an expandable interface, the expandable interface comprises a wireless module and an Ethernet control interface module, and the underground wired connection and the underground connection of each terminal equipment on the well are, Wireless communication integration, scheduling and management.
Description
Technical Field
The invention relates to the technical field of mining communication equipment, in particular to a mining multifunctional base station.
Background
China is a big coal country, the third world of coal storage quantity is proved, and the first world of coal mining quantity is found. Meanwhile, China is also a country with high mine accidents, and the coal mine accidents are continuously caused for many years, so that the people are surprised and the number of dead people is high at the head of safety accidents in various industries. Statistical data show that China accounts for 35% of the world's coal mining volume, but accounts for 80% of the world's coal mine accident death population. The severe safety production situation forces coal enterprises to seek the informatization solution and products of coal mine safety production under the strong support of national policies. In the early 2011, the national safety production supervision and administration issues the basic standard for building and perfecting the 'six systems for safety and risk avoidance in coal mine' (No. 2011) 33 in the safety supervision and administration. The national supervision department politically puts forward clear requirements on the construction of the 'six systems' of the coal mine.
The 'six systems' for safety risk avoidance under the coal mine refers to a monitoring system, a personnel positioning system, an emergency risk avoidance system, a forced air self-rescue system, a water supply rescue system and a communication contact system. Wherein, the monitoring and controlling system, the personnel positioning system and the communication system all relate to the construction requirement of the communication network, the base station equipment in the mine wireless communication system network is an important link, which must meet the requirements of underground safety and production as well as the communication requirements of ground production, command, management and various aspects of human life, the safety of the underground communication equipment must be paid high attention, in particular to electronic communication equipment, such as the base station must be arranged in a special explosion-proof box to be thoroughly isolated from the air in a mine, thus even if the base station generates small sparks due to work, the safety of the mine cannot be influenced, the explosion-proof shells of most base stations used at present are complex, and for the base station applying an Ethernet wired control interface module, interruption signals are easily caused, so that the condition in the mine cannot be clearly obtained, it is not easy to schedule and manage.
Disclosure of Invention
In view of the defects in the prior art, the invention provides the mining multifunctional base station which has the advantages of good expandability, convenient use and simple operation.
In order to solve the technical problems, the invention adopts the following technical scheme: a mining multifunctional base station comprises an explosion-proof shell and a base station;
the base stations comprise an exchanger and a functional module, the exchanger is the core of the base station and is divided into a kilomega exchanger and a ten-gigabit exchanger, the base stations containing the kilomega exchanger are connected with various underground terminal devices through network cables, the base stations containing the kilomega exchanger are connected to the base stations containing the ten-gigabit exchanger through optical fibers, the base stations containing the ten-gigabit exchanger are connected with a ground centralized control center through the optical fibers, and the functional module is connected with the exchanger through an expandable interface;
the flameproof shell comprises an upper shell and a lower shell, a rubber sheath I is arranged between the upper shell and the lower shell, a pair of hinges is arranged on the left sides of the upper shell and the lower shell, split pins are arranged on the hinges, the right side of the upper shell is fixed by cross round head screws, a stainless steel nameplate is attached to the front side of the upper shell, a function display lamp panel is arranged at the top of the front side of the upper shell, two layers of compression washers and one layer of explosion-proof transparent glass are arranged between the lamp panel and the upper shell and are finally fixed on the inner side of the upper shell by compression nuts III, two antenna interfaces are respectively arranged on the left side and the right side of the bottom of the lower shell, two antennas are led out by feeders, an N-shaped head waterproof seat I and a waterproof pad I are arranged at the interfaces, an inner spiral structure is arranged in the N-shaped head, a matched antenna is connected and screwed, the joint of the interface and the shell is provided with a waterproof seat II and a waterproof pad II which are fixed by a compression nut II.
As a further improvement of the invention, two fixing lugs are respectively arranged at the left side and the right side of the lower shell and used for fixing the base station.
As a further improvement of the invention, the 4 lead interfaces can lead out network cables, optical fibers and power lines, a circular steel sheet with the same diameter and the thickness of 2mm is arranged in each lead interface, if the lead interfaces need to be led out, the steel sheets need to be taken out before connection, and if the lead interfaces do not need to be connected with the lead wires, the steel sheets block the interfaces and play a role in isolation.
As a further improvement of the invention, the rubber sheath, the waterproof seat, the waterproof pad and the pressure washer are all made of ABS flame-retardant materials, so that the waterproof and flame-retardant rubber sheath has a good flame-proof effect.
As a further improvement of the invention, the expandable interface comprises a wireless module and a network port.
As a further improvement of the present invention, the switch has a plurality of expansion interfaces, and different functional modules can be plugged in the switch to implement different functions.
As a further improvement of the invention, the cross round head screws are 2 in total and are all M6X20 in model.
As a further improvement of the invention, the number of the compression nuts I is 2, and the models are phi 3.
As a further improvement of the invention, the top of the lower shell is provided with a handle.
As a further improvement of the invention, the transparent glass is made of organic glass.
As a further improvement of the invention, a rubber sheath II is also arranged outside the antenna interface.
Compared with the prior art, the invention has the beneficial effects that: 1. the explosion-proof shell of the mining multifunctional base station is simple in structure and can be completely isolated from the outside; 2. the function module of the invention is connected with the switch through the expandable interface, and the expandable interface comprises a wireless module and an Ethernet control interface module, thereby realizing the integration, dispatching and management of wired and wireless communication of each terminal device on the well and under the well.
Drawings
The invention will be further described with reference to the following drawings and detailed description:
fig. 1 is a front view of a schematic diagram of the mining multifunctional base station;
fig. 2 is a side view of a schematic diagram of the mining multifunctional base station;
FIG. 3 is an enlarged view of A in FIG. 1;
fig. 4 is a base station connection diagram.
In the figure: 1. the waterproof structure comprises an upper shell, 2 parts of a lower shell, 3 parts of fixing lugs, 4 parts of a handle, 5 parts of a cross round head screw, 101 parts of a hinge, 102 parts of a cotter pin, 103 parts of a nameplate, 104 parts of transparent glass, 105 parts of a rubber sheath I, 107 parts of a display lamp panel, 108 parts of transparent glass, 109 parts of a compression washer, 110 parts of a compression nut III, 201 parts of a feeder line, 202 parts of a rubber sheath II, 203 parts of a lead interface, 204 parts of an antenna interface, 205 parts of a waterproof pad 1,206 parts of a waterproof seat I, 207 parts of a compression nut I, 208 parts of a waterproof pad II, 209 parts of a steel sheet, 210 parts of a waterproof seat II, 211 parts of a compression.
It is noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Detailed Description
For better understanding of the technical solutions and advantages of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and specific embodiments, it should be understood that the specific embodiments described herein are only for the understanding of the present invention and are not intended to limit the present invention, and all other embodiments obtained by those of ordinary skill in the art without any inventive work are within the scope of the present invention.
As shown in fig. 1-4, a technical solution of a mining multifunctional base station of the present invention is a mining multifunctional base station, which includes a flameproof housing and a base station;
the base stations comprise an exchanger and a functional module, the exchanger is the core of the base station and is divided into a kilomega exchanger and a ten-gigabit exchanger, the base stations containing the kilomega exchanger are connected with various underground terminal devices through network cables, the base stations containing the kilomega exchanger are connected to the base stations containing the ten-gigabit exchanger through optical fibers, the base stations containing the ten-gigabit exchanger are connected with a ground centralized control center through the optical fibers, and the functional module is connected with the exchanger through an expandable interface;
the flameproof shell comprises an upper shell 1 and a lower shell 2, a rubber sheath I105 is arranged between the upper shell 1 and the lower shell 2, a pair of hinges 101 are arranged on the left sides of the upper shell and the lower shell, a cotter 102 is arranged on the hinge 101, the right side of the hinge is fixed by a cross round-head screw 5, a stainless steel nameplate 103 is attached to the front side of the upper shell 1, a function display lamp panel 107 is arranged at the top of the front side of the upper shell, two layers of pressure washers 109 and one layer of explosion-proof transparent glass 108 are arranged between the lamp panel 107 and the upper shell 1, and finally the upper shell 1 is fixed at the inner side of the upper shell by a pressure nut III 110, the left side and the right side of the bottom of the lower shell 2 are respectively provided with an antenna interface 204, two antennas are respectively provided with a feeder 201 led out through the antenna interface, an N-shaped head waterproof seat I206 and a waterproof pad I205 are arranged at, 4 lead interfaces 203 are arranged between the two antenna interfaces 204, and waterproof seats II 210 and waterproof cushions II 208 are arranged at the joints of the interfaces and the shell and are fixed by compression nuts II 211.
Preferably, two fixing lugs 3 are respectively arranged at the left side and the right side of the lower shell 2 for fixing the base station.
Preferably, the 4 lead interfaces 203 can lead out network cables, optical fibers and power lines, a circular steel sheet 209 with the same diameter and the thickness of 2mm is arranged in each lead interface 203, if the lead interfaces 203 need to be led out, the steel sheet 209 needs to be taken out before connection, and if the lead interfaces 203 do not need to be connected with the lead wires, the steel sheet 209 blocks the interfaces and plays a role in isolation.
Preferably, the rubber sheath, the waterproof seat, the waterproof pad and the pressure washer are all made of ABS flame-retardant materials, so that the waterproof and flame-retardant rubber sheath is waterproof and flame-retardant, and can achieve a good flame-proof effect.
Preferably, the expandable interface includes both a wireless module and a network port.
Preferably, the switch is provided with a plurality of expansion interfaces, different functional modules can be plugged, different functions are realized, the switch can be normally used only by simple configuration, the functional modules can be plugged and taken down and can be replaced according to needs, the expansion interfaces are used, and various terminal devices used in the underground can be connected.
Preferably, the cross round head screws 5 are 2 in total, and are all M6X20 in model.
Preferably, the number of the compression nuts I207 is 2, and the models are all phi 3.
Preferably, a handle 4 is provided on the top of the lower case 2.
Preferably, the transparent glass 108 is made of organic glass, and can achieve an explosion-proof effect.
Preferably, a rubber sheath II 202 is further arranged outside the antenna interface 204.
The upper shell and the lower shell are separated by the rubber sheath, and after the bolts are fixed, the upper shell and the lower shell are tightly sealed without gaps, are waterproof and flame-retardant, and can achieve a good explosion-proof effect.
Claims (10)
1. A mining multifunctional base station is characterized in that: the system comprises an explosion-proof shell and a base station;
the base stations comprise an exchanger and a functional module, the exchanger is the core of the base station and is divided into a kilomega exchanger and a ten-gigabit exchanger, the base stations containing the kilomega exchanger are connected with various underground terminal devices through network cables, the base stations containing the kilomega exchanger are connected to the base stations containing the ten-gigabit exchanger through optical fibers, the base stations containing the ten-gigabit exchanger are connected with a ground centralized control center through the optical fibers, and the functional module is connected with the exchanger through an expandable interface;
the flameproof shell comprises an upper shell and a lower shell, a rubber sheath I is arranged between the upper shell and the lower shell, a pair of hinges is arranged on the left sides of the upper shell and the lower shell, split pins are arranged on the hinges, the right side of the upper shell is fixed by cross round head screws, a stainless steel nameplate is attached to the front side of the upper shell, a function display lamp panel is arranged at the top of the front side of the upper shell, two layers of compression washers and one layer of explosion-proof transparent glass are arranged between the lamp panel and the upper shell and are finally fixed on the inner side of the upper shell by compression nuts III, two antenna interfaces are respectively arranged on the left side and the right side of the bottom of the lower shell, two antennas are led out by feeders, an N-shaped head waterproof seat I and a waterproof pad I are arranged at the interfaces, an inner spiral structure is arranged in the N-shaped head, a matched antenna is connected and screwed, the joint of the interface and the shell is provided with a waterproof seat II and a waterproof pad II which are fixed by a compression nut II.
2. The mining multifunctional base station of claim 1, characterized in that: the left side and the right side of the lower shell are respectively provided with two fixing lugs for fixing the base station.
3. The mining multifunctional base station of claim 1, characterized in that: the 4 lead interfaces can lead out network cables, optical fibers and power lines, an equal-diameter circular steel sheet with the thickness of 2mm is arranged in each lead interface, if the lead interfaces need to be led out, the steel sheets need to be taken out before connection, and if the lead interfaces do not need to be connected with the lead out wires, the steel sheets block the interfaces and play a role in isolation.
4. The mining multifunctional base station of claim 1, characterized in that: the rubber sheath, the waterproof seat, the waterproof pad and the pressure washer are all made of ABS flame-retardant materials, are waterproof and flame-retardant, and can achieve a good flame-proof effect.
5. The mining multifunctional base station of claim 1, characterized in that: the extensible interface comprises a wireless module and a network port, the switch is provided with a plurality of extensible interfaces, different functional modules can be plugged, different functions are realized, normal use can be realized only by simple configuration, the functional modules can be plugged and taken down, the functional modules can be replaced according to needs, the extensible interfaces are used, and various terminal devices used in a well can be connected.
6. The mining multifunctional base station of claim 1, characterized in that: the total number of the cross round head screws is 2, and the models are all M6X 20.
7. The mining multifunctional base station of claim 1, characterized in that: the I quantity of gland nut is 2, and the model is phi 3.
8. The mining multifunctional base station of claim 1, characterized in that: the top of the lower shell is provided with a handle.
9. The mining multifunctional base station of claim 1, characterized in that: the transparent glass is made of organic glass.
10. The mining multifunctional base station of claim 1, characterized in that: and a rubber sheath II is also arranged outside the antenna interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910829412.9A CN112449521B (en) | 2019-09-03 | 2019-09-03 | Mining multifunctional base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910829412.9A CN112449521B (en) | 2019-09-03 | 2019-09-03 | Mining multifunctional base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112449521A true CN112449521A (en) | 2021-03-05 |
| CN112449521B CN112449521B (en) | 2024-05-07 |
Family
ID=74734079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910829412.9A Active CN112449521B (en) | 2019-09-03 | 2019-09-03 | Mining multifunctional base station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112449521B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000004533A (en) * | 1998-06-15 | 2000-01-07 | Mitsubishi Electric Corp | Explosion-proof base station device |
| CN103595659A (en) * | 2013-11-29 | 2014-02-19 | 陕西汇华数字科技有限公司 | Mining explosive-proof and intrinsic safety type 10-gigabit looped network switch |
| CN203457242U (en) * | 2013-05-03 | 2014-02-26 | 唐山市占友安防工程有限公司 | Visual wireless monitoring system for coal mine inclined shaft lifting |
| CN105281997A (en) * | 2015-11-10 | 2016-01-27 | 深圳市翌日科技有限公司 | Underground multifunctional integrated base station system |
| CN210491421U (en) * | 2019-09-03 | 2020-05-08 | 山东新云鹏电气有限公司 | Mining multifunctional base station |
-
2019
- 2019-09-03 CN CN201910829412.9A patent/CN112449521B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000004533A (en) * | 1998-06-15 | 2000-01-07 | Mitsubishi Electric Corp | Explosion-proof base station device |
| CN203457242U (en) * | 2013-05-03 | 2014-02-26 | 唐山市占友安防工程有限公司 | Visual wireless monitoring system for coal mine inclined shaft lifting |
| CN103595659A (en) * | 2013-11-29 | 2014-02-19 | 陕西汇华数字科技有限公司 | Mining explosive-proof and intrinsic safety type 10-gigabit looped network switch |
| CN105281997A (en) * | 2015-11-10 | 2016-01-27 | 深圳市翌日科技有限公司 | Underground multifunctional integrated base station system |
| CN210491421U (en) * | 2019-09-03 | 2020-05-08 | 山东新云鹏电气有限公司 | Mining multifunctional base station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112449521B (en) | 2024-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210491421U (en) | Mining multifunctional base station | |
| CN105281997A (en) | Underground multifunctional integrated base station system | |
| CN112449521A (en) | Mining multifunctional base station | |
| CN112907904A (en) | Intelligent alarm control system and control method | |
| CN109301530A (en) | A kind of New Low Voltage cable plant distribution plate | |
| CN206699250U (en) | A kind of intelligent mouse blocking plate for underground power house equipment room | |
| CN206099303U (en) | Vehicular methane circuit breaker | |
| CN102251655A (en) | Multifunctional high-voltage insulated overhauling platform | |
| CN211906813U (en) | Surface coating LED booth is apart from display screen | |
| CN218513609U (en) | Power module for Beidou communication and Beidou emergency communication box with power module | |
| CN205061267U (en) | Integrated elevator car intercom | |
| CN209881978U (en) | Mining flame proof and intrinsic safety type kilomega Ethernet ring network switch | |
| CN220820519U (en) | Dynamic self-networking power environment monitoring system | |
| CN217279778U (en) | Public regional wisdom emergency management device | |
| CN110738336A (en) | office computer timely maintenance management system | |
| CN203466333U (en) | Instrument for mosaic and cable plug thereof | |
| CN215351742U (en) | Building fire hose with emergency lighting function | |
| CN211062154U (en) | Cable anti-theft monitoring equipment | |
| CN214587212U (en) | Intelligent alarm control system | |
| CN217467812U (en) | Power grid fault maintenance prompting device | |
| CN216748978U (en) | Intelligent traffic signal device for bus | |
| CN217116478U (en) | Explosion-proof regional lamp control device | |
| CN214996388U (en) | Novel wisdom bus stop | |
| CN218849004U (en) | Fire emergency lighting and evacuation indicating system | |
| CN217278945U (en) | Universal GNSS receiver |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |