CN109339482A - A kind of boring method of underground flue - Google Patents
A kind of boring method of underground flue Download PDFInfo
- Publication number
- CN109339482A CN109339482A CN201811197125.2A CN201811197125A CN109339482A CN 109339482 A CN109339482 A CN 109339482A CN 201811197125 A CN201811197125 A CN 201811197125A CN 109339482 A CN109339482 A CN 109339482A
- Authority
- CN
- China
- Prior art keywords
- underground flue
- crown area
- refractory brick
- flue
- plate
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B29/00—Other details of coke ovens
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
Abstract
The invention discloses a kind of boring methods of underground flue, comprising: S1 removes the concrete on the crown area of underground flue；S3, in the inside that the first plate of placed inside of underground flue, the first plate are used to prevent refractory brick from falling to underground flue；S4 removes the refractory brick of crown area, to form the hole of underground flue in crown area.This method can prevent refractory brick during removing refractory brick from falling into underground flue.
Description
Technical field
The invention belongs to engineering construction technical field of construction more particularly to a kind of boring methods of underground flue.
Background technique
Currently, flue gas purification device is widely used the improvement in coke oven flue gas as national environmental protection policy is increasingly strict.
During cock-oven gas purifying plant construction, needs to take out coke oven original flue gas, discharge, relate to again after being handled by purification device
And in former coke oven underground flue aperture, coke oven underground flue is mostly buried concrete arch flue, and a coke oven generation " furnace
Age " 30 years, there is no the chance of shutdown maintenance after starting, therefore, coke oven underground flue aperture needs real in coke oven operational process
It applies.Coke oven aperture in the past is mostly to cut flue top concrete, then take out after the refractory brick of vault is abolished, in the mistake for taking brick
Cheng Zhong, most refractory brick can be fallen into flue.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of boring method of underground flue, this method can prevent from removing
Refractory brick is fallen into underground flue during refractory brick.
To solve the above problems, the technical solution of the present invention is as follows:
A kind of boring method of underground flue, comprising:
S1 removes the concrete on the crown area of the underground flue；
S3, in the first plate of placed inside of the underground flue, first plate is for preventing refractory brick from falling to
The inside of the underground flue；
S4 removes the refractory brick of the crown area, to form the hole of the underground flue in the crown area.
An embodiment according to the present invention includes step S2 between the step S1 and the step S3；
S2 builds construction operation platform on the crown area for having removed the concrete.
An embodiment according to the present invention, the step S1 include:
S101 makes label on the crown area of the underground flue；
S102 drills to the concrete of the marked locations；
The concrete that the drilling surrounds region is sling and is transported by S103.
An embodiment according to the present invention, it is described to be made on the crown area of the underground flue labeled as in the underground
The position of aperture is needed to draw solid marks on the crown area of flue；
The concrete to the marked locations carries out drilling and bores drilling to carry out round along the solid marks
Operation.
An embodiment according to the present invention, the step S3 include:
S301 removes the part refractory brick on the crown area, forms a gap on the crown area；
First plate is placed in the inside of the underground flue by S302 by the gap, wherein first plate
On be connected with tractive unit.
An embodiment according to the present invention, the step S301 include:
S3011, along the radial refractory brick for taking out crown area described in the first ring of the underground flue；
S3012, along the radial refractory brick for taking out crown area described in the second ring of the underground flue；
S3013, along the radial refractory brick for taking out crown area described in third ring of the underground flue.
An embodiment according to the present invention, the step S4 include:
S401, the refractory brick of crown area described in the axially away ring along the underground flue；
S402, the tractive unit are moved at the refractory brick position of crown area described in first plate to next ring, are returned
The step S401 is returned, until forming described hole.
An embodiment according to the present invention, the step S402 further include, using the second plate to the dismounting crown area
Refractory brick after notch blocked；
Wherein, second plate is heat-insulating and sealing plate.
An embodiment according to the present invention, every refractory brick for removing crown area described in tricyclic once seal the notch
It is stifled.
The present invention due to using the technology described above, makes it have the following advantages that and actively imitate compared with prior art
Fruit:
1) one embodiment of the invention is by the placed inside in underground flue for preventing refractory brick from falling to underground flue
The first plate need to remove a large amount of refractory brick in Tapping procedures, the first plate can stop the refractory brick fallen,
Falling for refractory brick is avoided to accumulate in underground flue.
2) one embodiment of the invention can be square by building construction operation platform on the crown area for removed concrete
Just staff carries out operation, improves the safety and construction efficiency of entire work progress.
3) one embodiment of the invention is mixed by making label on the crown area of underground flue, and to marked locations
Solidifying soil drills, and by drilling out a large amount of drilling along label, the concrete strength on crown area is lower, it is easier to tear open
It removes.
4) one embodiment of the invention can move the first plate by connecting tractive unit, tractive unit on the first plate, in this way
When removing the refractory brick at different location, tractive unit moves the first plate to corresponding refractory brick lower zone, improves
Construction efficiency.
5) notch after the refractory brick for removing crown area is sealed using the second plate in one embodiment of the invention
Stifled, the second plate is heat-insulating and sealing plate, on the one hand can be avoided cool exterior air by sealing gap and enters in the flue,
Guarantee that chimney has the negative pressure of 300~600Pa, guarantees that chimney also can be produced normally in operation process；On the other hand by setting
Setting heat-insulating and sealing plate can also prevent construction worker from being scalded by high temperature, improve the safety of construction operation.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the boring method of underground flue of the invention；
Fig. 2 is the flow chart of the concrete on a kind of crown area of dismounting underground flue of the invention；
Fig. 3 is a kind of flow chart of the first plate of placed inside in underground flue of the invention；
Fig. 4 is a kind of flow chart that a gap is formed on crown area of the invention；
Fig. 5 is a kind of flow chart of the refractory brick of dismounting crown area of the invention；
Fig. 6 is that a kind of round of the boring method of underground flue of the invention bores the schematic diagram of bore position；
Fig. 7 is a kind of structural schematic diagram of the operation platform of the boring method of underground flue of the invention；
Fig. 8 is a kind of riding position schematic diagram of the operation platform of the boring method of underground flue of the invention；
Fig. 9 is a kind of structural schematic diagram of the first plate of the boring method of underground flue of the invention；
Figure 10 is a kind of riding position schematic diagram of the first plate of the boring method of underground flue of the invention；
Figure 11 is a kind of structural schematic diagram of the second plate of the boring method of underground flue of the invention.
Description of symbols: 1: round drilling；2: arch beam；3: arch；4: traction rope；5: the first plates；6: heat preservation
Nail；7: support plate；8: insulating layer.
Specific embodiment
It is further detailed to a kind of underground flue boring method work proposed by the present invention below in conjunction with the drawings and specific embodiments
It describes in detail bright.According to following explanation and claims, advantages and features of the invention will be become apparent from.
Referring to Fig. 1, a kind of boring method of underground flue, comprising:
S1 removes the concrete on the crown area of underground flue；
Further, include: referring to Fig. 2, step S1
S101 makes label on the crown area of underground flue；Specifically, being needed on the crown area of underground flue
The position of aperture draws solid marks；
S102 drills to the concrete of marked locations；Specifically, carrying out round drilling along solid marks
Operation；
The concrete that drilling surrounds region is sling and is transported by S103.
It is appreciated that by making label on the crown area of underground flue, and to the concrete of marked locations into
Row drilling, by drilling out a large amount of drilling along label, the concrete strength on crown area is lower, it is easier to remove.
So far, the description to the concrete on the crown area shown in Fig. 2 for removing underground flue is completed.
S3, in the first plate of placed inside of underground flue, the first plate is for preventing refractory brick from falling to underground flue
Inside；
Further, referring to Fig. 3, step S3 includes:
S301 removes the part refractory brick on crown area, forms a gap on crown area；
Specifically, include: referring to Fig. 4, step S301
S3011, along the radial refractory brick for taking out the first ring crown area of underground flue；
S3012, along the radial refractory brick for taking out the second ring crown area of underground flue；
S3013, along the radial refractory brick for taking out third ring crown area of underground flue.
It is appreciated that the gap in present embodiment is the notch after the refractory brick for removing tricyclic crown area.
So far, it completes to the description shown in Fig. 4 for forming a gap on crown area.
First plate is placed in the inside of underground flue by S302 by gap, wherein traction is connected on the first plate
Portion.
By connecting tractive unit on the first plate, tractive unit can move the first plate, remove at different location in this way
Refractory brick when, tractive unit move the first plate to corresponding refractory brick lower zone, improve construction efficiency.
So far, the description to placed inside the first plate shown in Fig. 3 in underground flue is completed.
S4 removes the refractory brick of crown area, to form the hole of underground flue in crown area.
Further, include: referring to Fig. 5, step S4
S401, along the refractory brick of the axially away ring crown area of underground flue；
S402, tractive unit move at the first plate to the refractory brick position of next ring crown area, return step S401, directly
To formation hole.
Further, step S402 further includes, using the second plate to the notch after the refractory brick for removing crown area
It is blocked；Wherein, the second plate is heat-insulating and sealing plate.
On the one hand present embodiment passes through sealing gap can be avoided cool exterior air into the flue, guarantee chimney
There is the negative pressure of 300~600Pa, guarantees that chimney also can be produced normally in operation process；On the other hand heat-insulated close by being arranged
Sealing plate material can also prevent construction worker from being scalded by high temperature, improve the safety of construction operation.
Specifically, every refractory brick for removing tricyclic crown area once blocks notch.
So far, the description to the refractory brick shown in fig. 5 for removing crown area is completed.
It further, include step S2 between step S1 and step S3；Step S2 is in the vault area for having removed concrete
Construction operation platform is built on domain.
Staff can be facilitated to carry out operation by building construction operation platform, improve the safety of entire work progress
Property and construction efficiency.
It is envisioned that inevitably will appear the situation that refractory brick is fallen in underground flue during removing refractory brick,
If not avoiding such case as far as possible, accumulation refractory brick or other building wastes in underground flue will cause, and then influence ground
The smoke discharging effect of lower flue.The present embodiment is by the placed inside in underground flue for preventing refractory brick from falling to underground flue
The first plate need to remove a large amount of refractory brick in Tapping procedures, the first plate can stop the refractory brick fallen,
Falling for refractory brick is avoided to accumulate in underground flue.It is to be understood that in Tapping procedures, refractory brick or other buildings
It does not fall out when rubbish is fallen to underground flue, but falls on the first plate, in this way after construction is completed, only need
It clears up on the first plate and falls object.
So far, the description to the boring method of underground flue shown in FIG. 1 is completed.
The boring method of underground flue of the invention is further elaborated with a Specific construction process below.Under
State specific work progress can to method of the invention and its used in power tool be more completely understood.
Referring to Fig. 6 to Figure 11, a kind of underground flue boring method, comprising the following steps:
A: flue top surface concrete is abolished comprising the steps of:
(1) region of aperture will be needed to draw solid line in the flue top surface；
(2) operation of round drilling 1 is carried out along solid line,；
(3) the monolith concrete of one meter of square is sling with loop wheel machine and is transported；
B: operation platform is placed comprising the steps of:
(1) operation platform is put into the flue after having taken out top concrete；
(2) it is laid with plate on operation platform and binds securely, is operated so that operating personnel may stand on operation platform,
And can once stand 3~4 people, greatly improve operating efficiency；
C: key brick anti-fall plate is placed comprising the steps of:
(1) refractory brick at the top of the first annular smoke flue is radially taken out along the flue；
(2) refractory brick at the top of the second annular smoke flue is radially taken out along the flue；
(3) refractory brick at the top of third annular smoke flue is radially taken out along the flue；
(4) key brick anti-fall plate is put into flue, then slowly along one ring refractory brick of the every dismounting of flue axial later
Mobile key brick anti-fall plate, in case refractory brick falls into coke oven underground flue and can not take out；
D: abolishing refractory brick and blocks hole, it is every removed tricyclic refractory brick after, hole is carried out with heat-insulating and sealing backplate
It blocks, avoids cool exterior air from entering in flue, guarantee that chimney has the negative pressure of 300~600Pa, to maintain normal production.
In step a (1), needs the length in the region of aperture and wide be less than or equal to one meter.
A kind of underground flue boring method of the invention, in step a (2), the aperture that the round bores drilling 1 is 100mm,
The drilling of the adjacent round will be close to arrangement, it is therefore an objective to facilitate subsequent loop wheel machine and hang the monolith concrete of 1 meter of square
It rises.
In step b (1), operation platform includes arch 3 and arch beam 2.Wherein, it is flat to be connected to construction for arch beam 3 and arch 2
Platform.The length of arch beam 3 is the ragged edge distance plus 200~500mm of the opening area on edge on flue, so that arch beam 3 is complete
It is erected on flue and there are certain safe clearances.The length dimension of arch 2 is the length of flue radial aperture, to ensure to apply
Work platform can be put into flue completely.The width dimensions of arch 2 are the length of flue axial aperture, to ensure that operation platform can
To be put into flue completely.The height dimension of arch 2 is that arch crown refractory brick to flue top surface distance subtracts 100mm, to ensure to construct
Platform can be put into flue completely, will not be collided with arch crown refractory brick.
In step c (4), key brick anti-fall plate includes traction rope 4 and the first plate 5.Wherein, traction rope 4 and the first plate
Material 5 is connected.The length of traction rope 4 is more than or equal to 1.5 times of arch crown refractory brick top surface to flue top surface distance, so that traction rope 4
The top surface of extended flue, convenient for the first plate 5 of lifting.
The length dimension of first plate 5 is the connection in flue on the vertical refractory brick in two sides along 60 ° of directions and vault intersection
Linear dimension, to prevent the vault when abolishing refractory brick from collapsing.The width dimensions of first plate 5 are more than or equal to the thickness of 3 times of refractory brick
Degree to control the weight of the first plate 5, while ensure that the first plate 5 can be moved flexibly when taking refractory brick.
In step d, sealing heat-insulated backplate includes support plate 7, insulating layer 8 and bar for line 6.Wherein, insulating layer 8 is upper and lower
Face is fitted with support plate 7.Bar for line 6 is for connecting insulating layer 8 and support plate 7.
The length dimension of heat-insulating and sealing backplate adds 200~500mm for the distance along flue radial aperture, it is therefore an objective to which there are remaining
It is tight to measure boder district sealing.The width dimensions of heat-insulating and sealing backplate are more than or equal to 3 times of refractory brick thickness, to ensure that refractory brick takes
It can be blocked rapidly after walking and be not take up additional working space.
The length of bar for line 6 is 100~500mm, to ensure that top can further roll over while fixed insulating layer 8
Curved fastening.
Specifically, arch beam 2 is made using 14# channel steel, and arch 3 is made using the round steel of diameter 32mm.
The use of first plate 5 is made with a thickness of the Q235B carbon steel sheet of 4~8mm thickness, and the use of traction rope 4 diameter 3~
The steel wire of 8mm is made.
Support plate 7 using the galvanized steel plain sheet with a thickness of 1~3mm, it is therefore an objective to convenient for bending；The use of insulating layer 8 100~
The rock wool of 300mm thickness, it is therefore an objective to operating personnel's scald can be effectively prevented simultaneously with the flue after seal and opening.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode.Even if to the present invention, various changes can be made, if these variations belong to the model of the claims in the present invention and its equivalent technologies
Within enclosing, then still fall within the protection scope of the present invention.
Claims (9)
1. a kind of boring method of underground flue characterized by comprising
S1 removes the concrete on the crown area of the underground flue；
S3, in the first plate of placed inside of the underground flue, first plate is described for preventing refractory brick from falling to
The inside of underground flue；
S4 removes the refractory brick of the crown area, to form the hole of the underground flue in the crown area.
2. the boring method of underground flue as described in claim 1, which is characterized in that the step S1 and step S3 it
Between include step S2；
S2 builds construction operation platform on the crown area for having removed the concrete.
3. the boring method of underground flue as described in claim 1, which is characterized in that the step S1 includes:
S101 makes label on the crown area of the underground flue；
S102 drills to the concrete of the marked locations；
The concrete that the drilling surrounds region is sling and is transported by S103.
4. the boring method of underground flue as claimed in claim 3, which is characterized in that the vault in the underground flue
It is made on region and is labeled as that the position of aperture is needed to draw solid marks on the crown area of the underground flue；
The concrete to the marked locations carries out drilling to carry out the work that round bores drilling along the solid marks
Industry.
5. the boring method of underground flue as described in claim 1, which is characterized in that the step S3 includes:
S301 removes the part refractory brick on the crown area, forms a gap on the crown area；
First plate is placed in the inside of the underground flue by S302 by the gap, wherein is connected on first plate
It is connected to tractive unit.
6. the boring method of underground flue as claimed in claim 5, which is characterized in that the step S301 includes:
S3011, along the radial refractory brick for taking out crown area described in the first ring of the underground flue；
S3012, along the radial refractory brick for taking out crown area described in the second ring of the underground flue；
S3013, along the radial refractory brick for taking out crown area described in third ring of the underground flue.
7. the boring method of underground flue as described in claim 1, which is characterized in that the step S4 includes:
S401, the refractory brick of crown area described in the axially away ring along the underground flue；
S402, the tractive unit move at the refractory brick position of crown area described in first plate to next ring, return to institute
Step S401 is stated, until forming described hole.
8. the boring method of underground flue as claimed in claim 7, which is characterized in that the step S402 further includes using
Second plate blocks the notch after the refractory brick for removing the crown area；
Wherein, second plate is heat-insulating and sealing plate.
9. the boring method of underground flue as claimed in claim 8, which is characterized in that crown area described in every dismounting tricyclic
Refractory brick once blocks the notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811197125.2A CN109339482A (en) | 2018-10-15 | 2018-10-15 | A kind of boring method of underground flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811197125.2A CN109339482A (en) | 2018-10-15 | 2018-10-15 | A kind of boring method of underground flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109339482A true CN109339482A (en) | 2019-02-15 |
Family
ID=65310129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811197125.2A Pending CN109339482A (en) | 2018-10-15 | 2018-10-15 | A kind of boring method of underground flue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109339482A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556294A (en) * | 2004-01-12 | 2004-12-22 | 广东宏大爆破工程有限公司 | Reinforced concrete chimney folding blasting disassembling method |
| CN103374356A (en) * | 2012-04-25 | 2013-10-30 | 五冶集团上海有限公司 | Flue arch crown online opening pipe connecting method for smoke waste-heat utilization of coke oven |
| CN103726674A (en) * | 2013-12-27 | 2014-04-16 | 上海建工二建集团有限公司 | Lattice-column dismounting method |
| CN105569376A (en) * | 2015-12-17 | 2016-05-11 | 上海建工一建集团有限公司 | Demolition construction method for building wall |
| CN106522581A (en) * | 2016-12-04 | 2017-03-22 | 河南理工大学 | Method for demolish chimney manually |
| CN107268947A (en) * | 2017-06-13 | 2017-10-20 | 五冶集团上海有限公司 | The construction method of arc flue perforate |
-
2018
- 2018-10-15 CN CN201811197125.2A patent/CN109339482A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556294A (en) * | 2004-01-12 | 2004-12-22 | 广东宏大爆破工程有限公司 | Reinforced concrete chimney folding blasting disassembling method |
| CN103374356A (en) * | 2012-04-25 | 2013-10-30 | 五冶集团上海有限公司 | Flue arch crown online opening pipe connecting method for smoke waste-heat utilization of coke oven |
| CN103726674A (en) * | 2013-12-27 | 2014-04-16 | 上海建工二建集团有限公司 | Lattice-column dismounting method |
| CN105569376A (en) * | 2015-12-17 | 2016-05-11 | 上海建工一建集团有限公司 | Demolition construction method for building wall |
| CN106522581A (en) * | 2016-12-04 | 2017-03-22 | 河南理工大学 | Method for demolish chimney manually |
| CN107268947A (en) * | 2017-06-13 | 2017-10-20 | 五冶集团上海有限公司 | The construction method of arc flue perforate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102692131B (en) | Method for overhauling fire-resistant material for annular air duct and chute in coke dry quenching furnace | |
| CN109000261A (en) | Stoker fired grate formula garbage burning boiler construction method of installation | |
| CN108518083A (en) | The Demolition Construction method of main sintering building | |
| CN105542800B (en) | Coke dry quenching furnace liner overhaul construction method | |
| CN110079338B (en) | Coke oven body dismantling and rebuilding method | |
| CN103374356B (en) | Flue arch crown online opening pipe connecting method for smoke waste-heat utilization of coke oven | |
| WO2011027610A1 (en) | Method of demolishing furnace of multilayered-refractory structure | |
| CN109735675B (en) | Method for quickly overhauling refractory lining of blast furnace hot air main pipe | |
| JP2008266533A (en) | Method for constructing coke oven and temporary shed for constructing the coke oven | |
| CN107268947B (en) | The construction method of arc flue aperture | |
| CN109339482A (en) | A kind of boring method of underground flue | |
| CN107163956A (en) | A kind of quick overhaul construction method of coke dry quenching furnace liner | |
| CN106586912B (en) | Hot-blast stove on-bne repair refractory material transportation system, group and repair method | |
| CN106766929B (en) | Independent hot-blast stove on-bne repair Nai Cai transportation system and repair method | |
| CN108342533B (en) | blast furnace residual iron safe discharging opening control method | |
| CN104061784B (en) | Annular lime kiln maintenance construction method | |
| CN108913832A (en) | The method for dismounting of resistance to material in a kind of super-huge hot-blast stove furnace | |
| CN108049655B (en) | Dismantling construction method for pipeline with heat-insulating wear-resistant lining | |
| CN111121464A (en) | Method for repairing damaged partition wall of internal combustion type hot blast stove | |
| CN102304367A (en) | Coke oven body mending process | |
| CN102134620B (en) | Blast furnace shaft upper part rapid heating for producing lining by wet method | |
| CN112980468A (en) | Construction method of online flue tapping and non-stop baffle valve production system | |
| CN204345661U (en) | Incineration of industry peril waste stove dump chimney | |
| CN101875989A (en) | Hot blast stove for refining iron and improved construction process | |
| CN204355993U (en) | A kind of New-type hot-air furnace vault manhole repairs hanging apparatus online |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201102 Address after: Building 1, No. 1508 Mudanjiang Road, Baoshan District, Shanghai, 201900 Applicant after: Baowu Water Technology Co., Ltd Address before: 201999, Shanghai, Baoshan District, 550 grams Road, No. 7, No. business building, 2 and 3 Applicant before: SHANGHAI BAOSTEEL ENERGY TECH Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190215 |
|
| WD01 | Invention patent application deemed withdrawn after publication |