CN110307165A - A kind of cutter device for mixed-flow pump - Google Patents
A kind of cutter device for mixed-flow pump Download PDFInfo
- Publication number
- CN110307165A CN110307165A CN201910547936.9A CN201910547936A CN110307165A CN 110307165 A CN110307165 A CN 110307165A CN 201910547936 A CN201910547936 A CN 201910547936A CN 110307165 A CN110307165 A CN 110307165A
- Authority
- CN
- China
- Prior art keywords
- driving shaft
- fixedly connected
- flow pump
- mixed
- gear
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to mixed flow pump technical fields, more particularly to a kind of cutter device for mixed-flow pump, for can inevitably have some solids in existing fluid, such as plastics, paper, the rubbish such as clod, these are fixed rubbish and timely handle and can be entangled on impeller, it will cause import blockage when serious, motor is caused to burn, the problem of causing unnecessary economic loss, now propose following scheme, it includes shell, wheel hub is equipped in the shell, impeller blade is fixedly connected on the wheel hub, the side of the shell is fixedly connected with output shaft, embedded groove is equipped in the output shaft, driving shaft is equipped in the embedded groove, fixed block is symmetrically fixedly connected on the driving shaft, the present invention carries out ceaselessly rotation by cut-off blade, driving shaft also will drive mounting plate rotation when rotating, so that cut-off blade carries out not Solids is constantly cut in the revolution stopped, is shredded and is more conducive to be discharged, will not block inlet tube.
Description
Technical field
The present invention relates to mixed flow pump technical field more particularly to a kind of cutter devices for mixed-flow pump.
Background technique
Mixed-flow pump is a kind of pump between centrifugal pump and axial-flow pump.The specific speed of mixed-flow pump is higher than centrifugal pump, is lower than
Axial-flow pump, generally between 300-500.Its lift is higher than axial-flow pump, but flow-rate ratio axial-flow pump is small, bigger than centrifugal pump, works as original
After the rotation of motivation impeller, there is axial thrust again to the existing centrifugal force of the effect of liquid, is the synthesis of centrifugal pump and axial-flow pump,
The oblique outflow impeller of liquid, for conveying the medium of cleaning and pollution, chemically neutral or rodent medium are strong in chemical-process
Make circulation, sea-farming, town gas engineering, water treatment system.
Traditional mixed-flow pump can inevitably have some solids in fluid when carrying out pumped (conveying) medium by impeller, such as mould
The rubbish such as material, paper, clod, these are fixed rubbish and timely handle and can be entangled on impeller, will cause import when serious
Blockage causes motor to burn, and causes unnecessary economic loss.
In order to solve the deficiencies in the prior art, we have proposed a kind of cutter devices for mixed-flow pump.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, solve traditional mixed-flow pump and are passing through leaf
When wheel carries out pumped (conveying) medium, can inevitably there are some solids, such as plastics, paper, clod rubbish in fluid, these fix rubbish
Rubbish timely handle and can be entangled on impeller, will cause import blockage when serious, motor is caused to burn, it is unnecessary to cause
Economic loss the problem of.
To achieve the goals above, present invention employs following technical solutions:
A kind of cutter device for mixed-flow pump, including shell, the shell is interior to be equipped with wheel hub, fixed company on the wheel hub
It is connected to impeller blade, the side of the shell is fixedly connected with output shaft, is equipped with embedded groove, the embedded groove in the output shaft
It is interior to be equipped with driving shaft, it is symmetrically fixedly connected with fixed block on the driving shaft, annular groove, the ring are offered on the output shaft
Shape slot is matched with fixed block, on the driving shaft fixation be interspersed with mounting plate, be symmetrically rotatably connected on the mounting plate from
Moving axis, is equipped with transmission mechanism between the driving shaft and driven shaft, the driven shaft is equipped with cutting mechanism
Preferably, the transmission mechanism includes first gear and second gear, and the second gear fixation is interspersed in driven
On axis, the first gear fixation is interspersed on driving shaft, and the first gear engages connection with second gear.
Preferably, the cutting mechanism includes fixing sleeve, and the fixing sleeve is fixedly attached on driven shaft, the fixing sleeve
On be fixedly connected with multiple cut-off blades, multiple cut-off blades are annular uniform array distribution.
Preferably, gap is symmetrically offered on the output shaft, the gap and fixed block match setting.
Preferably, the fixed block is fixedly connected in a ring groove by fixing bolt, and the side of the output shaft is symmetrical
Offer the through-hole matched with fixing bolt.
Preferably, the driving shaft is rectangle setting, and rectangular channel is offered in the output shaft, and the driving shaft sliding connects
It connects in rectangular channel, one end of the driving shaft is fixedly connected with brute spring, the one end of the brute spring far from driving shaft
It is fixedly connected on the bottom wall of rectangular channel.
Compared with prior art, the beneficial effects of the present invention are:
1, it in the present invention, when wheel hub impeller blade is rotated, so that output shaft be driven to be rotated, then leads
Moving axis starts turning, so that first gear rotates, is further driven to two sides second gear and is rotated, so that driven
Axis follows rotation, drives cut-off blade to carry out ceaselessly rotation under the connection function of fixing sleeve, while when driving shaft rotation also
It will drive mounting plate rotation, so that cut-off blade is ceaselessly revolved, to constantly be cut to solids, by it
Chopping is more conducive to be discharged, and will not block inlet tube.
2, fixed block is placed in annular groove by the present invention by gap, while driving shaft is embedded in embedded groove, is then revolved
Turning driving shaft slides fixed block in a ring groove, until when through-hole is corresponding with the threaded hole on fixed block, to will consolidate
Determine bolt to screw in threaded hole across through-hole, completion is fixedly connected with driving shaft, passes through the side wall and fixing bolt of annular groove
It is common limit under, guarantee driving shaft stable connection, without departing from, convenient for driving shaft disassembly install.
3, the present invention is cooperated by the rectangle of driving shaft and rectangular channel, is guaranteed the torque transmitting of output shaft, is worked as impeller blade
When rotation carries out medium transmission, driving shaft is slided by external object impact Shi Huixiang rectangular channel, to squeeze strength
Spring compresses brute spring, is buffered by the elastic force that the compression of brute spring generates, prevents impact forces excessive
Device is integrally impacted.
Detailed description of the invention
Fig. 1 is a kind of positive structure schematic of the cutter device embodiment one for mixed-flow pump proposed by the present invention；
Fig. 2 is the enlarged diagram in Fig. 1 at A；
Fig. 3 is the side structure schematic diagram of output shaft in Fig. 1；
Fig. 4 is the side structure schematic diagram of fixing sleeve in Fig. 1；
Fig. 5 is a kind of positive structure schematic of the cutter device embodiment two for mixed-flow pump proposed by the present invention.
In figure: 1- shell, 2- wheel hub, 3- impeller blade, 4- output shaft, 5- mounting plate, 6- driving shaft, 7- driven shaft, 8-
Second gear, 9- fixing sleeve, 10- cut-off blade, 11- embedded groove, 12- annular groove, 13- fixed block, 14- fixing bolt, 15- are logical
Hole, 16- gap, 17- rectangular channel, 18- brute spring, 19- first gear.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
Embodiment one
Referring to Fig.1-4, a kind of cutter device for mixed-flow pump, including shell 1, are equipped with wheel hub 2 in shell 1, on wheel hub 2
It is fixedly connected with impeller blade 3, the side of shell 1 is fixedly connected with output shaft 4, is equipped with embedded groove 11, embedded groove in output shaft 4
It is equipped with driving shaft 6 in 11, is symmetrically fixedly connected with fixed block 13 on driving shaft 6, annular groove 12 is offered on output shaft 4, annular
Slot 12 is matched with fixed block 13, symmetrically offers gap 16 on output shaft 4, and gap 16 and fixed block 13 match setting, Gu
Determine block 13 to be fixedly connected in annular groove 12 by fixing bolt 14, the side of output shaft 4 symmetrically offers and fixing bolt 14
Fixed block 13 is placed in annular groove 12 by the through-hole 15 matched by gap 16, while driving shaft 6 is embedded in embedded groove 11
Interior, then rotating drive shaft 6 slides fixed block 13 in annular groove 12, until the threaded hole on through-hole 15 and fixed block 13
When corresponding, screwed in threaded hole so that fixing bolt 14 is passed through through-hole 15, complete being fixedly connected to driving shaft 6, pass through
Under the common limit of the side wall and fixing bolt 14 of annular groove 12, guarantee 6 stable connection of driving shaft, without departing from convenient for actively
The disassembly of axis 6 is installed.
Fixation is interspersed with mounting plate 5 on driving shaft 6, is symmetrically rotatably connected to driven shaft 7 on mounting plate 5, driving shaft 6 with from
Transmission mechanism is equipped between moving axis 7, transmission mechanism includes first gear 19 and second gear 8, second gear 8 is fixed be interspersed in from
On moving axis 7, the fixation of first gear 19 is interspersed on driving shaft 6, and first gear 19 engages connection with second gear 8, when 2 band of wheel hub
When movable vane impeller blade 3 is rotated, so that output shaft 4 be driven to be rotated, then driving shaft 6 is started turning, so that the
The rotation of one gear 19, is further driven to two sides second gear 8 and is rotated, so that driven shaft 7 follows rotation, in fixing sleeve
It driving cut-off blade 10 to carry out ceaselessly rotation under 9 connection function, completes power transmission, driven shaft 7 is equipped with cutting mechanism,
Cutting mechanism includes fixing sleeve 9, and fixing sleeve 9 is fixedly attached on driven shaft 7, and multiple cutting leaves are fixedly connected on fixing sleeve 9
Piece 10, multiple cut-off blades 10 are annular uniform array distribution, and multiple cut-off blades 10 ensure that the cutting efficiency to rubbish, more
When a cut-off blade 10 is rotated, surrounding solid object can constantly be cut, be shredded and be more conducive to be discharged, will not blocked
Inlet tube.
In the present invention, its working principle is that: when 2 impeller blade 3 of wheel hub is rotated, to drive output shaft 4
Rotated, then driving shaft 6 starts turning so that first gear 19 rotate, be further driven to two sides second gear 8 into
Row rotation drives cut-off blade 10 to carry out ceaselessly so that driven shaft 7 follows rotation under the connection function of fixing sleeve 9
Rotation, while also will drive the rotation of mounting plate 5 when the rotation of driving shaft 6, so that cut-off blade 10 is ceaselessly revolved, from
And solids is constantly cut, it is shredded and is more conducive to be discharged, inlet tube will not be blocked, the present invention passes through fixed block 13
Gap 16 is placed in annular groove 12, while driving shaft 6 is embedded in embedded groove 11, and then rotating drive shaft 6 makes fixed block 13
It is slided in annular groove 12, until when through-hole 15 is corresponding with the threaded hole on fixed block 13, so that fixing bolt 14 be passed through
Through-hole 15 screws in threaded hole, completes being fixedly connected to driving shaft 6, passes through the side wall of annular groove 12 and being total to for fixing bolt 14
With under limit, guarantee 6 stable connection of driving shaft, without departing from convenient for the disassembly installation of driving shaft 6.
Embodiment two
Referring to Fig. 5, a kind of cutter device for mixed-flow pump, including shell 1, shell 1 is interior to be equipped with wheel hub 2, consolidates on wheel hub 2
Surely it is connected with impeller blade 3, the side of shell 1 is fixedly connected with output shaft 4, is symmetrically fixedly connected with fixed block on driving shaft 6
13, embodiment two and embodiment one the difference is that, driving shaft 6 is that rectangle is arranged, and offers rectangular channel in output shaft 4
17, driving shaft 6 is slidably connected in rectangular channel 17, and one end of driving shaft 6 is fixedly connected with brute spring 18, and brute spring 18 is remote
One end from driving shaft 6 is fixedly connected on the bottom wall of rectangular channel 17, is cooperated by the rectangle of driving shaft 6 and rectangular channel 17, is protected
The torque transmitting for demonstrate,proving output shaft 4, when impeller blade 3, which rotates, carries out medium transmission, meeting when driving shaft 6 is impacted by external object
It is slided into rectangular channel 17, to squeeze brute spring 18 brute spring 18 is compressed, by the pressure of brute spring 18
The elastic force that contracting generates is buffered, and is prevented impact forces excessive and is integrally impacted to device.
Fixation is interspersed with mounting plate 5 on driving shaft 6, is symmetrically rotatably connected to driven shaft 7 on mounting plate 5, driving shaft 6 with from
Transmission mechanism is equipped between moving axis 7, transmission mechanism includes first gear 19 and second gear 8, second gear 8 is fixed be interspersed in from
On moving axis 7, the fixation of first gear 19 is interspersed on driving shaft 6, and first gear 19 engages connection with second gear 8, when 2 band of wheel hub
When movable vane impeller blade 3 is rotated, so that output shaft 4 be driven to be rotated, then driving shaft 6 is started turning, so that the
The rotation of one gear 19, is further driven to two sides second gear 8 and is rotated, so that driven shaft 7 follows rotation, in fixing sleeve
It driving cut-off blade 10 to carry out ceaselessly rotation under 9 connection function, completes power transmission, driven shaft 7 is equipped with cutting mechanism,
Cutting mechanism includes fixing sleeve 9, and fixing sleeve 9 is fixedly attached on driven shaft 7, and multiple cutting leaves are fixedly connected on fixing sleeve 9
Piece 10, multiple cut-off blades 10 are annular uniform array distribution, and multiple cut-off blades 10 ensure that the cutting efficiency to rubbish, more
When a cut-off blade 10 is rotated, surrounding solid object can constantly be cut, be shredded and be more conducive to be discharged, will not blocked
Inlet tube.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
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 (6)
1. a kind of cutter device for mixed-flow pump, including shell (1), which is characterized in that be equipped with wheel hub in the shell (1)
(2), it being fixedly connected with impeller blade (3) on the wheel hub (2), the side of the shell (1) is fixedly connected with output shaft (4),
Embedded groove (11) are equipped in the output shaft (4), are equipped with driving shaft (6) in the embedded groove (11), the driving shaft (6) on pair
Title is fixedly connected with fixed block (13), is offered annular groove (12) on the output shaft (4), the annular groove (12) and fixed block
(13) match, on the driving shaft (6) fixation be interspersed with mounting plate (5), be symmetrically rotatably connected on the mounting plate (5) from
Moving axis (7), is equipped with transmission mechanism between the driving shaft (6) and driven shaft (7), the driven shaft (7) is equipped with cutting mechanism.
2. a kind of cutter device for mixed-flow pump according to claim 1, which is characterized in that the transmission mechanism includes
First gear (19) and second gear (8), second gear (8) fixation are interspersed on driven shaft (7), the first gear
(19) fixation is interspersed on driving shaft (6), and the first gear (19) engages connection with second gear (8).
3. a kind of cutter device for mixed-flow pump according to claim 1, which is characterized in that the cutting mechanism includes
Fixing sleeve (9), the fixing sleeve (9) are fixedly attached on driven shaft (7), are fixedly connected with multiple cut on the fixing sleeve (9)
It cuts blade (10), multiple cut-off blades (10) are annular uniform array distribution.
4. a kind of cutter device for mixed-flow pump according to claim 1, which is characterized in that on the output shaft (4)
It symmetrically offers gap (16), the gap (16) and fixed block (13) match setting.
5. a kind of cutter device for mixed-flow pump according to claim 1, which is characterized in that the fixed block (13) is logical
It crosses fixing bolt (14) to be fixedly connected in annular groove (12), the side of the output shaft (4) symmetrically offers and fixing bolt
(14) through-hole (15) matched.
6. a kind of cutter device for mixed-flow pump according to claim 1, which is characterized in that the driving shaft (6) is
Rectangle setting, the output shaft (4) is interior to be offered rectangular channel (17), and the driving shaft (6) is slidably connected in rectangular channel (17),
One end of the driving shaft (6) is fixedly connected with brute spring (18), the one end of the brute spring (18) far from driving shaft (6)
It is fixedly connected on the bottom wall of rectangular channel (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910547936.9A CN110307165A (en) | 2019-06-24 | 2019-06-24 | A kind of cutter device for mixed-flow pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910547936.9A CN110307165A (en) | 2019-06-24 | 2019-06-24 | A kind of cutter device for mixed-flow pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110307165A true CN110307165A (en) | 2019-10-08 |
Family
ID=68076233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910547936.9A Pending CN110307165A (en) | 2019-06-24 | 2019-06-24 | A kind of cutter device for mixed-flow pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110307165A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677690A (en) * | 2020-06-16 | 2020-09-18 | 安徽埃斯克制泵有限公司 | Dredge pump with high self-priming performance |
| CN111779687A (en) * | 2020-07-10 | 2020-10-16 | 唐伟军 | Centrifugal fire control exhaust fan of discharging fume |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2232196A (en) * | 1989-04-26 | 1990-12-05 | Otis Eng Co | Connector assembly for wireline tool string |
| US5407293A (en) * | 1993-04-29 | 1995-04-18 | Crainich; Lawrence | Coupling apparatus for medical instrument |
| CN208236664U (en) * | 2018-04-11 | 2018-12-14 | 石家庄瑞特泵业有限公司 | A kind of Pulp pump stirring cutting and crushing device |
| CN208442035U (en) * | 2018-06-27 | 2019-01-29 | 福建省蓝光节能科技有限公司 | A kind of sewage pump |
-
2019
- 2019-06-24 CN CN201910547936.9A patent/CN110307165A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2232196A (en) * | 1989-04-26 | 1990-12-05 | Otis Eng Co | Connector assembly for wireline tool string |
| US5407293A (en) * | 1993-04-29 | 1995-04-18 | Crainich; Lawrence | Coupling apparatus for medical instrument |
| CN208236664U (en) * | 2018-04-11 | 2018-12-14 | 石家庄瑞特泵业有限公司 | A kind of Pulp pump stirring cutting and crushing device |
| CN208442035U (en) * | 2018-06-27 | 2019-01-29 | 福建省蓝光节能科技有限公司 | A kind of sewage pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677690A (en) * | 2020-06-16 | 2020-09-18 | 安徽埃斯克制泵有限公司 | Dredge pump with high self-priming performance |
| CN111779687A (en) * | 2020-07-10 | 2020-10-16 | 唐伟军 | Centrifugal fire control exhaust fan of discharging fume |
| CN111779687B (en) * | 2020-07-10 | 2021-08-06 | 山东绿佳空调设备有限公司 | Centrifugal fire control exhaust fan of discharging fume |
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| 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 | ||
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Application publication date: 20191008 |