CN110286208A - One kind being used for the tendentious detection device of spontaneous combustion of coal seam - Google Patents

One kind being used for the tendentious detection device of spontaneous combustion of coal seam Download PDF

Info

Publication number
CN110286208A
CN110286208A CN201910584476.7A CN201910584476A CN110286208A CN 110286208 A CN110286208 A CN 110286208A CN 201910584476 A CN201910584476 A CN 201910584476A CN 110286208 A CN110286208 A CN 110286208A
Authority
CN
China
Prior art keywords
shell
coal seam
spontaneous combustion
detection
tendentious
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
Application number
CN201910584476.7A
Other languages
Chinese (zh)
Inventor
韦善阳
苗青
孙威
曲日红
杨欢
阴昊阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou University
Original Assignee
Guizhou University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guizhou University filed Critical Guizhou University
Priority to CN201910584476.7A priority Critical patent/CN110286208A/en
Publication of CN110286208A publication Critical patent/CN110286208A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/22Fuels, explosives
    • G01N33/222Solid fuels, e.g. coal

Abstract

The present invention relates to seam mining technical fields, it discloses a kind of for the tendentious detection device of spontaneous combustion of coal seam, including detecting shell, the two sides of the detection shell are located at medium position insertion and are provided with termination, and flash lamp is provided with above detection shell, the inside of the detection shell, which is located at medium position, is provided with the short circuit detector being connected with termination.The present invention is provided with flash lamp and loudspeaker, pass through flash lamp and loudspeaker, it can remind mine internal work personnel that may cause the region of spontaneous combustion of coal seam at the first time, staff is facilitated to check mine inside coal seam, be provided with termination, the connection of termination and mine internal wire, by short circuit detector, when mine short circuit occurred inside, staff can be warned at the first time, and then staff is facilitated to check coal seam inside mine, prevent spontaneous combustion of coal seam on source.

Description

One kind being used for the tendentious detection device of spontaneous combustion of coal seam
Technical field
It is specifically a kind of to be used for the tendentious detection device of spontaneous combustion of coal seam the present invention relates to seam mining technical field.
Background technique
There are two the reason of subterranean coal spontaneous combustion, and one is internal cause, i.e., caused by coal itself.Because the main component of coal is Charcoal and air aoxidize when contacting, and oxidation distributes heat, if air circulation at this time, heat will scatter and disappear quickly, once it does not circulate, Heat is assembled to a certain extent, coal seam will spontaneous combustion, the reason of another causes spontaneous combustion of coal seam is typically due to electricity inside mine Caused by line short circuit, then spark ignition gas makes entire spontaneous combustion of coal seam.
Existing market is usually thermal imaging inspection for the equipment of spontaneous combustion of coal seam, cannot detect spontaneous combustion of coal seam from basic source The reason of, it is not provided with air circulation detector, cannot not be had in the spontaneous combustion for finding and solving coal seam at the first time and may cause Be arranged short circuit detector, cannot at the first time it is watchful may caused by spontaneous combustion of coal seam, be not provided with flash lamp and loudspeaker, Staff cannot be warned to may cause the region of spontaneous combustion of coal seam at the first time, lead to that spontaneous combustion of coal seam cannot be solved in basic source The case where, therefore, those skilled in the art provide one kind for the tendentious detection device of spontaneous combustion of coal seam, to solve above-mentioned back The problem of being proposed in scape technology.
Summary of the invention
The purpose of the present invention is to provide one kind to be used for the tendentious detection device of spontaneous combustion of coal seam, to solve above-mentioned background skill The problem of being proposed in art.
To achieve the above object, the invention provides the following technical scheme: it is a kind of for the tendentious detection dress of spontaneous combustion of coal seam It sets, including detection shell, the two sides of the detection shell are located at medium position insertion and are provided with termination, and detect shell The two sides of body, which are located above termination, is provided with air stream port, and the two sides of the detection shell are located at termination Lower section is provided with loudspeaking mouth, and detects and be provided with flash lamp above shell, and the front surface of the detection shell is provided with aobvious Show panel, and detect and be provided with battery on rear side of shell, the rear surface of the detection shell is located at the lower section setting of battery There is heat sink, the side that the inside of the detection shell is located at air stream port is provided with filter screen, and detects the inside of shell The side of filter screen is provided with air circulation detector, the inside of the detection shell be located at medium position be provided with and The connected short circuit detector of termination, and the inside for detecting shell is located at below short circuit detector and is provided with loudspeaker.
As further scheme of the invention: the termination includes wiring shell, the inside of the wiring shell It is provided with foam pad, logical spool is provided on the inside of the foam pad, the outside of the logical spool, which is located at port, is embedded in setting There is card slot, the connection tube is by card slot and wiring cage connection, and one end of connection tube is provided with hollow screw rod, the hollow Lantern ring is cased on the outside of screw rod.
As further scheme of the invention: the foam pad and wiring shell pass through fixed glue gluing, and foam Pad with a thickness of 5mm.
As further scheme of the invention: the inner surface of the lantern ring is provided with screw thread.
As further scheme of the invention: the two sides of the air stream port are provided through through-hole, through-hole Pore size is not less than 10mm, and the filter screen is connected together by buckling with air stream port.
As further scheme of the invention: the outside of the flash lamp is cased with lampshade, and lampshade is a kind of macromolecule rubber The component of glue material matter, and the quantity of flash lamp is no less than 3.
As further scheme of the invention: the short circuit detector and air circulation detector are fixed by snap In detection case inside.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is provided with flash lamp and loudspeaker can remind mine by flash lamp and loudspeaker at the first time Internal work personnel may cause the region of spontaneous combustion of coal seam, and staff is facilitated to check mine inside coal seam, reduce The working strength of staff.
2, the present invention is provided with termination, the connection of termination and mine internal wire, by short circuit detector, when When mine short circuit occurred inside, staff can be warned at the first time, and then staff is facilitated to check coal seam inside mine, Prevent spontaneous combustion of coal seam on source.
3, the present invention is provided with air circulation detector, when air circulation detector detects long-time air inside mine When not circulating, by trigger flashing lamp and loudspeaker, and then staff is reminded to check mine inside coal seam temperature, from And avoid coal seam temperature excessively high on source, cause spontaneous combustion.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for the tendentious detection device of spontaneous combustion of coal seam;
Fig. 2 is a kind of rearview for the tendentious detection device of spontaneous combustion of coal seam;
Fig. 3 is a kind of for detecting the schematic diagram of internal structure of shell in the tendentious detection device of spontaneous combustion of coal seam;
Fig. 4 is a kind of structural schematic diagram for termination in the tendentious detection device of spontaneous combustion of coal seam.
In figure: 1, detecting shell;2, display panel;3, loudspeaking mouth;4, termination;5, air stream port;6, flash lamp; 7, battery;8, heat sink;9, short circuit detector;10, air circulation detector;11, filter screen;12, loudspeaker;41, wiring Shell;42, foam pad;43, lead to spool;44, card slot;45, connection tube;46, hollow screw rod;47, lantern ring.
Specific embodiment
Please refer to Fig. 1~4, in the embodiment of the present invention, one kind being used for the tendentious detection device of spontaneous combustion of coal seam, including detection Shell 1, the two sides of detection shell 1 are located at medium position insertion and are provided with termination 4, and termination 4 includes outside wiring Shell 41, the inside of wiring shell 41 are provided with foam pad 42, and the inside of foam pad 42 is provided with logical spool 43, lead to the outer of spool 43 Side is located at insertion at port and is provided with card slot 44, and connection tube 45 is connect by card slot 44 with wiring shell 41, and connection tube 45 One end is provided with hollow screw rod 46, and the outside of hollow screw rod 46 is cased with lantern ring 47, passes through termination 4 and short circuit detector 9 Connection can detect the short-circuit condition of underground mine internal wire at the first time, and then be mentioned by flash lamp 6 with loudspeaker 12 The staff that wakes up checks coal seam temperature, avoids that spontaneous combustion of coal seam occurs on source, and foam pad 42 and wiring shell 41 pass through fixation Glue gluing, and foam pad 42 with a thickness of 5mm, by foam pad 42, the detection device connected with electric wire can be prevented unexpected The excessive situation for causing internal electric part impaired of vibration amplitude, and then the normal of detection device working performance is protected, while energy Enough avoiding termination 4, stress causes electric wire to be broken suddenly, mitigates the impact of stress by foam pad 42, so that circuit be protected to lead Logical integrality, the inner surface of lantern ring 47 are provided with screw thread, and termination 4 is socketed by lantern ring 47 and electric wire one end, pass through set Termination 4 can simply and easily be fixedly attached on electric wire, save the working strength of staff, simultaneously by ring 47 Staff can be facilitated to carry out installation and removal to detection device.
And the two sides for detecting shell 1 are located at the top of termination 4 and are provided with air stream port 5, air stream port 5 Two sides are provided through through-hole, and the pore size of through-hole is not less than 10mm, and filter screen 11 is blocked by buckle and air stream port 5 Connection is closed, the through-hole of air stream port 5 passes through air by the way that the air inside mine is transferred to air circulation detector 10 Flow-through detector 10 detects the velocity of liquid assets of mine inner air, when air stream passband reaches air circulation inspection within a certain period of time When surveying the minimum that device 10 detects, air circulation detector 10 starts to alarm, and issues alarm signal by flash lamp 6 and loudspeaker 12 Number, it, can by filter screen 11 a possibility that reminding staff to detect periphery coal seam temperature, and then avoid coal seam that spontaneous combustion occurs It prevents mine internal dust from entering to inside detection device, and then influences the working performance of detection device.
The lower section that the two sides of detection shell 1 are located at termination 4 is provided with loudspeaking mouth 3, and the top for detecting shell 1 is set It is equipped with flash lamp 6, the outside of flash lamp 6 is cased with lampshade, and lampshade is a kind of component of polymer rubber material, and flash lamp 6 Quantity is no less than 3, can remind coal seam inside staff's mine that spontaneous combustion of coal seam may occur at the first time by flash lamp 6 Trend, avoided on source coal seam occur spontaneous combustion a possibility that, the lampshade of polymer rubber material can completely cut off extraneous shock Lead to the breakage of flash lamp 6, and then flash lamp 6 is protected to work normally.
The front surface of detection shell 1 is provided with display panel 2, and the rear side for detecting shell 1 is provided with battery 7, detects The lower section that the rear surface of shell 1 is located at battery 7 is provided with heat sink 8, and the inside of detection shell 1 is located at air stream port 5 Side is provided with filter screen 11, and the inside for detecting shell 1 is located at the side of filter screen 11 and is provided with air circulation detector 10, The inside of detection shell 1 is located at the short circuit detector 9 for being provided at medium position and being connected with termination 4, and detects shell 1 The lower section that inside is located at short circuit detector 9 is provided with loudspeaker 12, and short circuit detector 9 and air circulation detector 10 pass through card Button is fixed on 1 inside of detection shell, and short circuit detector 9 is in flash lamp 6 and loudspeaker 12 with air circulation detector 10 It is electrically connected, by short circuit detector 9 and air circulation detector 10, can be avoided the possibility that spontaneous combustion occurs for coal seam inside mine Property, it reminds staff to check at the first time, the phenomenon that preventing spontaneous combustion of coal seam on source, protects mine internal work The safety of personnel, improves the safety of mine internal work personnel, while can be avoided staff to mine inside coal seam Circular test, reduce the working strength of staff.
The working principle of the invention is: one end of termination 4 is connected on mine internal wire, and the other end is connected to short On circuit detector 9, foam pad 42 inside termination 4 is able to detect that device accident vibration amplitude is excessive to lead to internal electric The impaired situation of part, and then protect the normal of detection device working performance, while can be avoided termination 4 stress is led suddenly Thread breakage is sent a telegraph, so that the integrality for protecting circuit to be connected, the lantern ring 47 connected with electric wire can simply and easily fill wiring Set 4 to be fixedly attached on electric wire, save the working strength of staff, at the same can facilitate staff to detection device into Row installation and removal are capable of the short of first time detection circuit by short circuit detector 9 when short circuit occurs for mine internal wire Road phenomenon, and then passed out alarm signal by loudspeaker 12 and flash lamp 6, remind staff to mine inside coal seam into Row checks, avoids the tendency of generation spontaneous combustion in coal seam inside mine, and the flash lamp 6 of 1 top of detection shell can be reminded at the first time The trend of spontaneous combustion of coal seam may occur for coal seam inside staff's mine, a possibility that avoiding coal seam that spontaneous combustion occurs on source, The lampshade of flash lamp 6 can completely cut off the extraneous breakage hit and lead to flash lamp 6, Jin Erbao by polymer rubber material structure It protects flash lamp 6 to work normally, the through-hole of air stream port 5 is by being transferred to air circulation detector for the air inside mine 10, the velocity of liquid assets of mine inner air is detected by air circulation detector 10, when air stream passband reaches within a certain period of time To air circulation detector 10 detect minimum when, air circulation detector 10 start to work, pass through flash lamp 6 and loudspeaker A possibility that 12 issue alarm signal, remind staff's detection periphery coal seam temperature, and then avoid coal seam that spontaneous combustion occurs, filtering Net 11 is connected together by buckle with air stream port 5, can prevent mine internal dust from entering to detection by filter screen 11 Inside device, and then the working performance of detection device is influenced, the display panel 2 of detection 1 front surface of shell can facilitate work people Member checks the data of operation detection device, carries out inspection debugging to mine internal alarm data convenient for staff, detects shell 1 The heat sink 8 of rear surface can will test the machinery heat discharge generated inside device, the performance for maintaining detection device to work normally.
It is above-described, it is merely preferred embodiments of the present invention, but protection scope of the present invention is not limited to This, anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention And its inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (7)

1. one kind is used for the tendentious detection device of spontaneous combustion of coal seam, including detection shell (1), which is characterized in that the detection shell The two sides of body (1) are located at medium position insertion and are provided with termination (4), and the two sides for detecting shell (1) are located at wiring It is provided with above device (4) air stream port (5), the two sides of detection shell (1) are located at the lower section of termination (4) It is provided with loudspeaking mouth (3), and detects and be provided with flash lamp (6) above shell (1), the front surface of detection shell (1) It is provided with display panel (2), and detects and be provided with battery (7) on rear side of shell (1), the rear surface of detection shell (1) It is provided with below battery (7) heat sink (8), the inside of detection shell (1) is located at the one of air stream port (5) Side is provided with filter screen (11), and detect shell (1) inside be located at filter screen (11) side be provided with air circulation detect The inside of device (10), detection shell (1) is located at the short circuit detector for being provided at medium position and being connected with termination (4) (9), it and detects the inside of shell (1) and is located at below short circuit detector (9) and is provided with loudspeaker (12).
2. according to claim 1 a kind of for the tendentious detection device of spontaneous combustion of coal seam, which is characterized in that the wiring Device (4) includes wiring shell (41), is provided with foam pad (42) on the inside of the wiring shell (41), the foam pad (42) Inside be provided with logical spool (43), the outside of the logical spool (43) is located at port insertion and is provided with card slot (44), described Connection tube (45) is connect by card slot (44) with wiring shell (41), and one end of connection tube (45) is provided with hollow screw rod (46), lantern ring (47) are cased on the outside of the hollow screw rod (46).
3. according to claim 2 a kind of for the tendentious detection device of spontaneous combustion of coal seam, which is characterized in that the foam Pad (42) and wiring shell (41) and pass through fixed glue gluing, and foam pad (42) with a thickness of 5mm.
4. according to claim 2 a kind of for the tendentious detection device of spontaneous combustion of coal seam, which is characterized in that the lantern ring (47) inner surface is provided with screw thread.
5. according to claim 1 a kind of for the tendentious detection device of spontaneous combustion of coal seam, which is characterized in that the air The two sides of communication port (5) are provided through through-hole, and the pore size of through-hole is not less than 10mm, and the filter screen (11) passes through card Button is connected together with air stream port (5).
6. according to claim 1 a kind of for the tendentious detection device of spontaneous combustion of coal seam, which is characterized in that the flash of light The outside of lamp (6) is cased with lampshade, and lampshade is a kind of component of polymer rubber material, and the quantity of flash lamp (6) is no less than 3 It is a.
7. according to claim 1 a kind of for the tendentious detection device of spontaneous combustion of coal seam, which is characterized in that the short circuit Detector (9) and air circulation detector (10) are fixed by snap on the inside of detection shell (1).
CN201910584476.7A 2019-07-01 2019-07-01 One kind being used for the tendentious detection device of spontaneous combustion of coal seam Pending CN110286208A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910584476.7A CN110286208A (en) 2019-07-01 2019-07-01 One kind being used for the tendentious detection device of spontaneous combustion of coal seam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910584476.7A CN110286208A (en) 2019-07-01 2019-07-01 One kind being used for the tendentious detection device of spontaneous combustion of coal seam

Publications (1)

Publication Number Publication Date
CN110286208A true CN110286208A (en) 2019-09-27

Family

ID=68021405

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910584476.7A Pending CN110286208A (en) 2019-07-01 2019-07-01 One kind being used for the tendentious detection device of spontaneous combustion of coal seam

Country Status (1)

Country Link
CN (1) CN110286208A (en)

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86206576U (en) * 1986-12-13 1987-12-12 煤炭工业部煤炭科学研究院上海研究所 Gas detector
CN2089981U (en) * 1990-07-13 1991-12-04 童敏明 Multifunction flue-gas alarm device of mine's lamp
EP0562538B1 (en) * 1992-03-26 1998-08-26 Matsushita Electric Industrial Co., Ltd. Gas burning apparatus
CN1248682A (en) * 1999-10-14 2000-03-29 郭俊彦 Indication type gas leakage alarm and automatic cutting off device
CN201198766Y (en) * 2008-05-27 2009-02-25 曹营聚 Mine lamp over current gas alarm
CN102650214A (en) * 2012-05-31 2012-08-29 中煤科工集团重庆研究院 Early warning method and system for on-line monitoring and analysis of mine ventilation system
CN202926392U (en) * 2012-10-18 2013-05-08 淄博矿业集团有限责任公司埠村煤矿 Test and failure warning device of coal mine air quantity sensor
CN204140133U (en) * 2014-09-30 2015-02-04 银川华盛新科技术有限公司 A kind of novel intelligent gas monitor warning system
CN204759671U (en) * 2015-07-31 2015-11-11 上海广合电气有限公司 Electrical fire monitoring device
CN204855687U (en) * 2015-08-19 2015-12-09 安徽理工大学 Cable fault detection device in pit based on STM32
CN107508165A (en) * 2017-09-14 2017-12-22 中科电力装备集团有限公司 A kind of high high-tension switch cabinet of security performance
CN207651679U (en) * 2017-12-05 2018-07-24 刘伟成 A kind of cable connector water-tight device
CN108952812A (en) * 2018-07-10 2018-12-07 贵州大学 A kind of coal mine remote monitoring system
CN208606408U (en) * 2018-07-04 2019-03-15 广东万家乐燃气具有限公司 A kind of burner for gas water-heater and strong pumping type gas heater
CN209043896U (en) * 2018-11-08 2019-06-28 屈美霞 One kind being based on computer system mining digitized gas parameter measuring prior-warning device

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86206576U (en) * 1986-12-13 1987-12-12 煤炭工业部煤炭科学研究院上海研究所 Gas detector
CN2089981U (en) * 1990-07-13 1991-12-04 童敏明 Multifunction flue-gas alarm device of mine's lamp
EP0562538B1 (en) * 1992-03-26 1998-08-26 Matsushita Electric Industrial Co., Ltd. Gas burning apparatus
CN1248682A (en) * 1999-10-14 2000-03-29 郭俊彦 Indication type gas leakage alarm and automatic cutting off device
CN201198766Y (en) * 2008-05-27 2009-02-25 曹营聚 Mine lamp over current gas alarm
CN102650214A (en) * 2012-05-31 2012-08-29 中煤科工集团重庆研究院 Early warning method and system for on-line monitoring and analysis of mine ventilation system
CN202926392U (en) * 2012-10-18 2013-05-08 淄博矿业集团有限责任公司埠村煤矿 Test and failure warning device of coal mine air quantity sensor
CN204140133U (en) * 2014-09-30 2015-02-04 银川华盛新科技术有限公司 A kind of novel intelligent gas monitor warning system
CN204759671U (en) * 2015-07-31 2015-11-11 上海广合电气有限公司 Electrical fire monitoring device
CN204855687U (en) * 2015-08-19 2015-12-09 安徽理工大学 Cable fault detection device in pit based on STM32
CN107508165A (en) * 2017-09-14 2017-12-22 中科电力装备集团有限公司 A kind of high high-tension switch cabinet of security performance
CN207651679U (en) * 2017-12-05 2018-07-24 刘伟成 A kind of cable connector water-tight device
CN208606408U (en) * 2018-07-04 2019-03-15 广东万家乐燃气具有限公司 A kind of burner for gas water-heater and strong pumping type gas heater
CN108952812A (en) * 2018-07-10 2018-12-07 贵州大学 A kind of coal mine remote monitoring system
CN209043896U (en) * 2018-11-08 2019-06-28 屈美霞 One kind being based on computer system mining digitized gas parameter measuring prior-warning device

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
LITTON, CHARLES D.ET AL.: "Laboratory evaluation of smoke detectors for use in underground mines", 《FIRE SAFETY JOURNAL》 *
丁文华 等: "《机电工程》", 31 May 2019, 武汉理工大学出版社 *
孙威: "掘进工作面瓦斯爆炸安全评价系统研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 *
张强: "西川矿含原生CO煤层自燃预测方法研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 *
苏颜丽 等: "《产品形态设计教程》", 31 July 2014, 上海科学技术出版社 *
韦善阳 等: "煤层钻孔瓦斯抽采与注水降尘一体化应用", 《中国矿业》 *

Similar Documents

Publication Publication Date Title
US9874342B1 (en) Gas warning head lamp
CN110286208A (en) One kind being used for the tendentious detection device of spontaneous combustion of coal seam
CN205337768U (en) Multi -functional miner's safety helmet
CN103381757A (en) Fault latch circuit of electric vehicle controller
CN207354462U (en) A kind of camera device for home security
CN207764937U (en) A kind of improved fire-fighting evacuation designation equipment
CN202102062U (en) Portable antistatic alarm
CN101794494A (en) Smoke-sensing fire detector labyrinth
CN214252418U (en) Intelligent indicating device for residual current in transformer area
CN204759644U (en) Acousto -optic alarms
CN103559766A (en) Fire alarm
CN206957767U (en) A kind of novel smog sensor
CN109118723B (en) Bus inflammable volatile matter monitoring devices
CN208869969U (en) A kind of tunnel optoelectric alarm
CN213123268U (en) Infrared beam detector for fire
CN205624664U (en) Novel multi -functional miner's lamp cap
CN107464398B (en) Line fault positions alarming device
CN213399891U (en) Security alarm device
CN207796712U (en) A kind of Multifunctional LED infrared induction headlamp
CN104899997A (en) Automatic fire alarm
CN216771664U (en) Underground coal gas safety detection device
CN218332803U (en) Photoelectric smoke detector
CN202373105U (en) Intelligent electronic fire early-warning device for high-rising buildings
CN215419632U (en) Automobile emergency starting power supply
CN208937337U (en) A kind of damping of electric vehicles device detection device

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
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190927