CN208407998U - A kind of graphite electrode production dipping process asphalt smoke purifying device - Google Patents

A kind of graphite electrode production dipping process asphalt smoke purifying device Download PDF

Info

Publication number
CN208407998U
CN208407998U CN201820318066.9U CN201820318066U CN208407998U CN 208407998 U CN208407998 U CN 208407998U CN 201820318066 U CN201820318066 U CN 201820318066U CN 208407998 U CN208407998 U CN 208407998U
Authority
CN
China
Prior art keywords
groove
fixed block
welded
spring
wall
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.)
Expired - Fee Related
Application number
CN201820318066.9U
Other languages
Chinese (zh)
Inventor
王勇
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.)
Datong Xincheng New Material Co Ltd
Original Assignee
Datong Xincheng New Material Co Ltd
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 Datong Xincheng New Material Co Ltd filed Critical Datong Xincheng New Material Co Ltd
Priority to CN201820318066.9U priority Critical patent/CN208407998U/en
Application granted granted Critical
Publication of CN208407998U publication Critical patent/CN208407998U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Treating Waste Gases (AREA)

Abstract

The utility model discloses a kind of graphite electrodes to produce dipping process asphalt smoke purifying device, including impregnating autoclave and electrical tar precipitator, electrical tar precipitator is located at the side of impregnating autoclave, the first fixed block is welded on the impregnating autoclave, first fixed block offers multiple first grooves far from the side of impregnating autoclave, electrical tar precipitator side is fixedly installed with smoke exhaust pipe, electrical tar precipitator is fixedly installed with one end of smoke-intake pipe far from the side of smoke exhaust pipe, the other end of smoke-intake pipe is fixedly installed with one end of exhaust hood, one end of exhaust hood is welded with the second fixed block, and second fixed block be adapted with the first fixed block, second fixed block is welded with multiple first support bars close to the side of the first fixed block, and first support bar is slidably mounted in the first groove, the first card slot is offered at the top of first support bar.The utility model can release first support bar and fix, consequently facilitating clearing up exhaust hood inside, structure is simple, easy to operate.

Description

A kind of graphite electrode production dipping process asphalt smoke purifying device
Technical field
The utility model relates to purification device technical fields more particularly to a kind of graphite electrode to produce dipping process glance coal Air purifying apparatus.
Background technique
Graphite electrode produces in dipping process, and impregnating autoclave glance coal in product out cannot be collected and can only be arranged into air It puts, not environmentally and the health of operating personnel cannot be guaranteed, and through retrieving, Authorization Notice No. is the special of CN201728033U Sharp file discloses asphalt smoke purifying device, including washing oil removing tower, and the bottom surface of washing oil removing tower is equipped with drainpipe, washing Oil removing tower is equipped with air inlet and air outlet, and air inlet is connected with main flue gas pipeline, and the other end of main flue gas pipeline is connected with branch Flue, it is characterised in that: spray equipment is equipped in the washing oil removing tower, the utility model is by using above-mentioned technical side Flue gas degreasing unit is arranged on flue, is washed to tar, flue dust and the pernicious gas etc. in flue gas, mist for case Change and absorb, has purified flue gas, purification efficiency is high, to make flue gas reach discharge standard, and structure is simple, manufacture and make With at low cost.
Purification device is applied for a long time, will form mud on exhaust hood, influences clean-up effect, graphite electrode production dipping work The problem of sequence asphalt smoke purifying device clears up exhaust hood there is inconvenience, therefore it is proposed that a kind of graphite electrode is raw Dipping process asphalt smoke purifying device is produced, for solving the above problems.
Utility model content
Purpose of the utility model is to solve disadvantages existing in the prior art, and a kind of graphite electrode proposed is raw Produce dipping process asphalt smoke purifying device.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of graphite electrode production dipping process asphalt smoke purifying device, including impregnating autoclave and electrical tar precipitator, electric fishing Tar device is located at the side of impregnating autoclave, is welded with the first fixed block on the impregnating autoclave, the first fixed block far from impregnating autoclave one Side offers multiple first grooves, and electrical tar precipitator side is fixedly installed with smoke exhaust pipe, electrical tar precipitator far from smoke exhaust pipe one Side is fixedly installed with one end of smoke-intake pipe, and the other end of smoke-intake pipe is fixedly installed with one end of exhaust hood, one end weldering of exhaust hood It is connected to the second fixed block, and the second fixed block is adapted with the first fixed block, the second fixed block is close to the side of the first fixed block Multiple first support bars are welded with, and first support bar is slidably mounted in the first groove, is offered at the top of first support bar First card slot offers the second groove in the top inner wall of the first groove, is slidably fitted with the first bayonet lock in the second groove, and first Bayonet lock is adapted with the first card slot, and the first intercommunicating pore is offered in the top inner wall of the second groove, sliding peace in the first intercommunicating pore Equipped with pull rod, the top of pull rod extends to the top of the first fixed block, and the bottom end of pull rod is welded on the first bayonet lock, the first connection The first spring groove is offered on the two sides inner wall in hole, and second support bar, second support bar are slidably fitted in the first spring groove One end be welded on pull rod, be welded with one end of the first spring on the side inner wall of the first spring groove, the first spring it is another End is welded in second support bar, and the side of the first bayonet lock is opened up there are two the second card slot, is offered on first fixed block Cavity, cavity are located at the side of the second groove, are fixedly installed with the same cross bar, movable sleeve on cross bar on the two sides inner wall of cavity Equipped with first connecting rod, the bottom end hinge of first connecting rod is connected with the second bayonet lock, and the second bayonet lock extends in the second groove simultaneously It is adapted with the second card slot, the top hinge of first connecting rod is connected with the second connecting rod, and second connecting rod one end extends to The outside of one fixed block offers second spring slot on the side inner wall of cavity, and the other end of the second connecting rod is slidably mounted on In second spring slot, one end of second spring, the other end welding of second spring are welded on the side inner wall of second spring slot In the second connecting rod.
Preferably, first sliding groove is offered on the two sides inner wall of first groove, the two sides of first support bar are welded It is connected to the first sliding block, and the first sliding block and the side walls of first sliding groove connect.
Preferably, one end of the second support bar offers slot rolling, rolls in slot rolling and is equipped with ball, and ball and the The inner wall of one spring groove contacts.
Preferably, second sliding slot is offered on the two sides inner wall of second groove, the two sides of the first bayonet lock are welded There are the second sliding block, the side walls connection of the second sliding block and second sliding slot.
Preferably, the second intercommunicating pore is offered on the side inner wall of the cavity, the second intercommunicating pore is connected with the second groove It is logical, and the second bayonet lock is slidably mounted in the second intercommunicating pore.
Preferably, the cavity is far from offering third connecting hole, the second connecting rod on the side inner wall of second spring slot It is slidably mounted in third connecting hole.
Compared with prior art, the utility model has the beneficial effects that passing through the first bayonet lock, pull rod, the second connecting rod, first The cooperation of spring and the first card slot realizes and releases fixed purpose to first support bar, moves up pull rod, and pull rod is to moving up It moves and first support bar is driven to move up, first support bar moves up and compress the first spring, and pull rod moves up drive First bayonet lock moves up, and the first bayonet lock moves down the first bayonet lock made and is detached from the first card slot, supports to realize to first The purpose of the fixation of bar is realized by the second connecting rod, the cooperation of first connecting rod, the second bayonet lock and second spring to One bayonet lock releases fixed purpose, pushes the second connecting rod, the second connecting rod is mobile and compresses second spring, and the second connecting rod is moved Dynamic to drive first connecting rod mobile, under the action of lever principle, first connecting rod drives the second bayonet lock mobile, the second bayonet lock Mobile the second bayonet lock made is detached from the second card slot, and fixed purpose is released to the first bayonet lock to realize, thus mobile impregnating autoclave, Convenient for clearing up exhaust hood.
The utility model can release first support bar and fix, consequently facilitating clearing up exhaust hood inside, structure Simply, easy to operate.
Detailed description of the invention
Fig. 1 be the utility model proposes a kind of graphite electrode produce dipping process asphalt smoke purifying device structure show It is intended to;
Fig. 2 be the utility model proposes a kind of graphite electrode produce dipping process asphalt smoke purifying device part A Structural schematic diagram.
In figure: 1 impregnating autoclave, 2 first fixed blocks, 3 second fixed blocks, 4 exhaust hoods, 5 smoke-intake pipes, 6 electrical tar precipitators, 7 rows Smoke pipe, 8 first grooves, 9 first support bars, 10 first card slots, 11 second grooves, 12 first bayonet locks, 13 pull rods, 14 first connections Hole, 15 first spring grooves, 16 second support bars, 17 first springs, 18 second card slots, 19 cavitys, 20 cross bars, 21 first connections Bar, 22 second bayonet locks, 23 second connecting rods, 24 second spring slots, 25 second springs, 26 second sliding slots, 27 second sliding blocks, 28 One sliding slot, 29 first sliding blocks, 30 second intercommunicating pores, 31 third connecting holes, 32 slot rollings, 33 balls.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.
Referring to Fig.1-2, a kind of graphite electrode produces dipping process asphalt smoke purifying device, including impregnating autoclave 1 and electric fishing Tar device 6, electrical tar precipitator 6 are located at the side of impregnating autoclave 1, and the first fixed block 2 is welded on impregnating autoclave 1, and the first fixed block 2 is remote Side from impregnating autoclave 1 offers multiple first grooves 8, and 6 side of electrical tar precipitator is fixedly installed with smoke exhaust pipe 7, electrically trapped tar oil Device 6 is fixedly installed with one end of smoke-intake pipe 5 far from the side of smoke exhaust pipe 7, and the other end of smoke-intake pipe 5 is fixedly installed with exhaust hood 4 One end, one end of exhaust hood 4 is welded with the second fixed block 3, and the second fixed block 3 is adapted with the first fixed block 2, and second is solid Determine block 3 and be welded with multiple first support bars 9 close to the side of the first fixed block 2, and to be slidably mounted on first recessed for first support bar 9 In slot 8, the top of first support bar 9 offers the first card slot 10, offers the second groove in the top inner wall of the first groove 8 11, the first bayonet lock 12 is slidably fitted in the second groove 11, and the first bayonet lock 12 is adapted with the first card slot 10, the second groove 11 The first intercommunicating pore 14 is offered in top inner wall, pull rod 13 is slidably fitted in the first intercommunicating pore 14, and the top of pull rod 13 extends To the top of the first fixed block 2, the bottom end of pull rod 13 is welded on the first bayonet lock 12, on the two sides inner wall of the first intercommunicating pore 14 The first spring groove 15 is offered, second support bar 16, one end weldering of second support bar 16 are slidably fitted in the first spring groove 15 Connect on pull rod 13, be welded with one end of the first spring 17 on the side inner wall of the first spring groove 15, the first spring 17 it is another End is welded in second support bar 16, and the side of the first bayonet lock 12 is opened up there are two the second card slot 18, is opened up on the first fixed block 2 There is cavity 19, cavity 19 is located at the side of the second groove 11, is fixedly installed with the same cross bar 20 on the two sides inner wall of cavity 19, Movable sleeve is equipped with first connecting rod 21 on cross bar 20, and the bottom end hinge of first connecting rod 21 is connected with the second bayonet lock 22, the second card Pin 22 is extended in the second groove 11 and is adapted with the second card slot 18, and the top hinge of first connecting rod 21 is connected with the second company Extension bar 23,23 one end of the second connecting rod extend to the outside of the first fixed block 2, offer the second bullet on the side inner wall of cavity 19 The other end of spring slot 24, the second connecting rod 23 is slidably mounted in second spring slot 24, on the side inner wall of second spring slot 24 Be welded with one end of second spring 25, the other end of second spring 25 is welded in the second connecting rod 23, by the first bayonet lock 12, The cooperation of pull rod 13, second support bar 16, the first spring 17 and the first card slot 10 is realized to release first support bar 9 and be fixed Purpose, move up pull rod 13, pull rod 13 moves up and second support bar 16 is driven to move up, second support bar 16 to The first spring 17 is simultaneously compressed in upper movement, and pull rod 13, which moves up, drives the first bayonet lock 12 to move up, and the first bayonet lock 12 is to moving down Dynamic the first bayonet lock 12 made is detached from the first card slot 10, to realize the purpose of the fixation to first support bar 9, passes through the second connection The cooperation of bar 23, first connecting rod 21, the second bayonet lock 22 and second spring 24 realizes and releases fixed mesh to the first bayonet lock 12 , the second connecting rod 23 is pushed, the second connecting rod 23 is mobile and compresses second spring 24, and the second connecting rod 23 is mobile to drive first Connecting rod 21 is mobile, and under the action of lever principle, first connecting rod 21 drives the second bayonet lock 22 mobile, the shifting of the second bayonet lock 22 Dynamic the second bayonet lock 22 made is detached from the second card slot 18, and fixed purpose is released to the first bayonet lock 12 to realize, thus mobile leaching Stain tank 1, convenient for clearing up exhaust hood 4, the utility model can release first support bar 9 and fix, consequently facilitating to row It is cleared up inside fan housing 4, structure is simple, easy to operate.
In the utility model, first sliding groove 28 is offered on the two sides inner wall of the first groove 8, the two of first support bar 9 Side is welded with the first sliding block 29, and the first sliding block 29 is connect with the side walls of first sliding groove 28, and the one of second support bar 16 End offers slot rolling 32, rolls in slot rolling 32 and is equipped with ball 33, and ball 33 is contacted with the inner wall of the first spring groove 15, and second Offering second sliding slot 26 on the two sides inner wall of groove 11, the two sides of the first bayonet lock 12 are welded with the second sliding block 27, and second Sliding block 27 is connect with the side walls of second sliding slot 26, and the second intercommunicating pore 30 is offered on the side inner wall of cavity 19, and second connects Through-hole 30 is connected with the second groove 11, and the second bayonet lock 22 is slidably mounted in the second intercommunicating pore 30, and cavity 19 is far from second Third connecting hole 31 is offered on the side inner wall of spring groove 24, the second connecting rod 23 is slidably mounted in third connecting hole 31, By the cooperation of the first bayonet lock 12, pull rod 13, second support bar 16, the first spring 17 and the first card slot 10, realize to first Support rod 9 releases fixed purpose, moves up pull rod 13, and pull rod 13 moves up and drives second support bar 16 to moving up Dynamic, second support bar 16 moves up and compresses the first spring 17, and pull rod 13, which moves up, drives the first bayonet lock 12 to move up, First bayonet lock 12 moves down the first bayonet lock 12 made and is detached from the first card slot 10, to realize the fixation to first support bar 9 Purpose is realized by the second connecting rod 23, the cooperation of first connecting rod 21, the second bayonet lock 22 and second spring 24 to first Bayonet lock 12 releases fixed purpose, pushes the second connecting rod 23, and the second connecting rod 23 is mobile and compresses second spring 24, and second connects Extension bar 23 is mobile to drive first connecting rod 21 mobile, and under the action of lever principle, first connecting rod 21 drives the second bayonet lock 22 Mobile, the second bayonet lock 22 that the movement of the second bayonet lock 22 makes is detached from the second card slot 18, releases admittedly to realize to the first bayonet lock 12 Fixed purpose, thus mobile impregnating autoclave 1, convenient for clearing up exhaust hood 4, the utility model can solve first support bar 9 Except fixation, consequently facilitating structure is simple, easy to operate to clearing up inside exhaust hood 4.
Working principle: when disassembly, the second connecting rod 23 is pushed first, the second connecting rod 23 is mobile and compresses second spring 25, the second connecting rod 23 is mobile to drive first connecting rod 21 mobile, and under the action of lever principle, first connecting rod 21 drives the Two bayonet locks 22 are mobile, and the second bayonet lock 22 that the movement of the second bayonet lock 22 makes is detached from the second card slot 18, to realize to the first bayonet lock 12 release fixed purpose, keep the position of the second connecting rod 23 constant, move pull rod 13 then up, pull rod 13 moves up And second support bar 16 is driven to move up, second support bar 16 moves up and compresses the first spring 17, and pull rod 13 is to moving up Dynamic that the first bayonet lock 12 is driven to move up, the first bayonet lock 12 moves down the first bayonet lock 12 made and is detached from the first card slot 10, when the When two bayonet locks 22 are corresponding with 18 position of the second card slot, the second connecting rod 23 is unclamped, under the elastic force effect of second spring 25, is made It obtains the second bayonet lock 22 to be caught in the second card slot 18, so that the fixed purpose of the releasing to first support bar 9 is realized, so that mobile soak Stain tank 1, it is simple in construction, easy to disassemble and assemble convenient for clearing up exhaust hood 4.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims (6)

1. a kind of graphite electrode produces dipping process asphalt smoke purifying device, including impregnating autoclave (1) and electrical tar precipitator (6), Electrical tar precipitator (6) is located at the side of impregnating autoclave (1), which is characterized in that is welded with the first fixed block on the impregnating autoclave (1) (2), the first fixed block (2) offers multiple first grooves (8) far from the side of impregnating autoclave (1), and electrical tar precipitator (6) side is solid Dingan County is equipped with smoke exhaust pipe (7), and electrical tar precipitator (6) is fixedly installed with one end of smoke-intake pipe (5) far from the side of smoke exhaust pipe (7), The other end of smoke-intake pipe (5) is fixedly installed with one end of exhaust hood (4), and one end of exhaust hood (4) is welded with the second fixed block (3), and the second fixed block (3) is adapted with the first fixed block (2), side of the second fixed block (3) close to the first fixed block (2) It is welded with multiple first support bars (9), and first support bar (9) is slidably mounted in the first groove (8), first support bar (9) Top offer the first card slot (10), the second groove (11), the second groove are offered in the top inner wall of the first groove (8) (11) it is slidably fitted with the first bayonet lock (12) in, the first bayonet lock (12) is adapted with the first card slot (10), the second groove (11) It offers in top inner wall the first intercommunicating pore (14), is slidably fitted with pull rod (13) in the first intercommunicating pore (14), pull rod (13) Top extends to the top of the first fixed block (2), and the bottom end of pull rod (13) is welded on the first bayonet lock (12), the first intercommunicating pore (14) it is offered on two sides inner wall the first spring groove (15), is slidably fitted with second support bar in the first spring groove (15) (16), one end of second support bar (16) is welded on pull rod (13), and is welded on the side inner wall of the first spring groove (15) One end of one spring (17), the other end of the first spring (17) are welded on second support bar (16), and the one of the first bayonet lock (12) Side is opened up there are two the second card slot (18), is offered cavity (19) on first fixed block (2), and it is recessed that cavity (19) is located at second The side of slot (11) is fixedly installed with the same cross bar (20) on the two sides inner wall of cavity (19), and cross bar is slidingly connected on (20) Have first connecting rod (21), the bottom end hinge of first connecting rod (21) is connected with the second bayonet lock (22), and the second bayonet lock (22) extends It is adapted in the second groove (11) and with the second card slot (18), the top hinge of first connecting rod (21) is connected with the second connection Bar (23), the second connecting rod (23) one end extend to the outside of the first fixed block (2), offer on the side inner wall of cavity (19) Second spring slot (24), the other end of the second connecting rod (23) are slidably mounted in second spring slot (24), second spring slot (24) one end of second spring (25) is welded on side inner wall, the other end of second spring (25) is welded on the second connecting rod (23) on.
2. a kind of graphite electrode according to claim 1 produces dipping process asphalt smoke purifying device, which is characterized in that It is offered first sliding groove (28) on the two sides inner wall of first groove (8), the two sides of first support bar (9) are welded with One sliding block (29), and the first sliding block (29) is connect with the side walls of first sliding groove (28).
3. a kind of graphite electrode according to claim 1 produces dipping process asphalt smoke purifying device, which is characterized in that One end of the second support bar (16) offers slot rolling (32), rolls and is equipped with ball (33) in slot rolling (32), and ball (33) it is contacted with the inner wall of the first spring groove (15).
4. a kind of graphite electrode according to claim 1 produces dipping process asphalt smoke purifying device, which is characterized in that It is offered second sliding slot (26) on the two sides inner wall of second groove (11), the two sides of the first bayonet lock (12) are welded with Two sliding blocks (27), the second sliding block (27) are connect with the side walls of second sliding slot (26).
5. a kind of graphite electrode according to claim 1 produces dipping process asphalt smoke purifying device, which is characterized in that It is offered the second intercommunicating pore (30) on the side inner wall of the cavity (19), the second intercommunicating pore (30) is connected with the second groove (11) It is logical, and the second bayonet lock (22) is slidably mounted in the second intercommunicating pore (30).
6. a kind of graphite electrode according to claim 1 produces dipping process asphalt smoke purifying device, which is characterized in that It is offered third connecting hole (31) on the side inner wall of the cavity (19) separate second spring slot (24), the second connecting rod (23) It is slidably mounted in third connecting hole (31).
CN201820318066.9U 2018-03-08 2018-03-08 A kind of graphite electrode production dipping process asphalt smoke purifying device Expired - Fee Related CN208407998U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820318066.9U CN208407998U (en) 2018-03-08 2018-03-08 A kind of graphite electrode production dipping process asphalt smoke purifying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820318066.9U CN208407998U (en) 2018-03-08 2018-03-08 A kind of graphite electrode production dipping process asphalt smoke purifying device

Publications (1)

Publication Number Publication Date
CN208407998U true CN208407998U (en) 2019-01-22

Family

ID=65121645

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820318066.9U Expired - Fee Related CN208407998U (en) 2018-03-08 2018-03-08 A kind of graphite electrode production dipping process asphalt smoke purifying device

Country Status (1)

Country Link
CN (1) CN208407998U (en)

Similar Documents

Publication Publication Date Title
CN208407998U (en) A kind of graphite electrode production dipping process asphalt smoke purifying device
CN206881927U (en) A kind of cleaning device of wet electrical dust precipitator
CN106964215A (en) A kind of environmentally friendly manufacture of cement workshop air-borne dust collecting device
CN210145802U (en) Hypergravity formula cooling dust collecting equipment
CN208742140U (en) A kind of dust depositing net of air purifier of easy cleaning
CN216963962U (en) Vertical blowing type dust removal filtering device
CN211502926U (en) Combined range hood for fresh air and clean oil smoke in kitchen
CN209237669U (en) A kind of efficient desulfurizing and dust collecting demisting combination unit
CN208694556U (en) A kind of cleaner being conveniently replaceable filter core
CN209392967U (en) A kind of high-pressure ion removes the purification device of glance coal
CN203483991U (en) Pulse jetting ash-removing bag type dust remover using ultraviolet lighting device
CN208195008U (en) A kind of cleaning device for New energy automobile motor
CN209010681U (en) A kind of elasticizer air cleaning unit
CN108514778A (en) A kind of smoke eliminator of the environmental protection of machinery field
CN209687576U (en) One kind being used for diesel engine exhaust gas purification device
CN208340333U (en) A kind of painting workshop pulse bag-type dust-removing equipment
CN211328514U (en) Dust filter of civil air defense filter absorber
CN220716914U (en) Electric tar precipitator for semi-coke gas treatment
CN206404501U (en) A kind of flushing type dust arrester of the reciprocal ash discharge of pressurizing filter
CN207413004U (en) A kind of manufacture of cement smoke purifying equipment of building engineering field
CN204981745U (en) Automobile -used firehole cleaning device of stamping charging coke oven U type piping cigarette
CN208212767U (en) A kind of filter board type deduster
CN208212774U (en) A kind of easy-to-mount filter drum type precipitator
CN206965369U (en) A kind of environmentally friendly manufacture of cement workshop air-borne dust collecting device
CN104384155A (en) Special dust removal device for solar warning street lamp

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190122

Termination date: 20210308

CF01 Termination of patent right due to non-payment of annual fee