CN206267231U - A kind of dewatering in siphon type filter for urban road - Google Patents
A kind of dewatering in siphon type filter for urban road Download PDFInfo
- Publication number
- CN206267231U CN206267231U CN201621309150.1U CN201621309150U CN206267231U CN 206267231 U CN206267231 U CN 206267231U CN 201621309150 U CN201621309150 U CN 201621309150U CN 206267231 U CN206267231 U CN 206267231U
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- China
- Prior art keywords
- metallic plate
- fixedly connected
- rose box
- manhole
- pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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- Sewage (AREA)
- Filtration Of Liquid (AREA)
Abstract
The utility model discloses a kind of dewatering in siphon type filter for urban road, including gully, the well head of the gully is provided with drainage manhole cover, the first metallic plate is provided with below drainage manhole cover, first metallic plate is provided with some second manholes, vertically disposed metal tube has been welded to connect at second manhole, metal tube is welded to connect with the top surface of the second metallic plate, draining bottom is connected with connecting tube, connecting tube is connected with siphon pipe, siphon pipe is connected with standpipe, standpipe is connected with Rose Box top, Rose Box inside top surface is fixedly connected with the deflector of spiral setting, deflector is fixedly connected with horizontally disposed 3rd metallic plate, the 4th metallic plate is provided with below 3rd metallic plate, 4th metallic plate lower section is provided with some deflection plates being staggered, Rose Box is connected by water pipe with cistern.The utility model can improve the deficiencies in the prior art, with faster drainage speed, while enhancing the filter effect to rainwater.
Description
Technical field
The utility model is related to road engineering drainage arrangement, especially a kind of dewatering in siphon type filtering for urban road
Device.
Background technology
In recent years, with the fast development of economic society, substantial amounts of road has been built in each city in succession.But road basis
Facility relatively lags behind, and pumping equipment is particularly problematic.Situations such as China enters into period in rainy season, various regions heavy rain, precipitation is universal,
Easily there is excess surface water situation.Reasonable collection treatment to rainwater is not only able to largely alleviate city use with application
Water anxiety problem, and for preventing road ponding, reduce flood control load, it is ensured that urban stability all has critically important in order
Meaning.The U of Chinese utility model patent CN 204401755 disclose a kind of dewatering in siphon type for urban road and filter system
System.The dewatering in siphon type filtration system of this design, rainwater-collecting and filter apparatus configuration are single, rainwater-collecting and drainage speed
It is relatively slow, while sufficiently can not be filtered to rainwater.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of dewatering in siphon type filter for urban road,
The deficiencies in the prior art are can solve the problem that, the structure of dewatering in siphon type filter is optimized, with faster drainage speed, while
Enhance the filter effect to rainwater.
In order to solve the above technical problems, technical solution adopted in the utility model is as follows.
A kind of dewatering in siphon type filter for urban road, including gully, the well head of the gully are provided with
Drainage manhole cover, drainage manhole cover is provided with some first manholes, and the side wall of gully is fixedly connected with locating ring, drainage manhole cover
Lower section is provided with the first metallic plate, and the bottom surface of the first metallic plate contacts with the top surface of locating ring, and the first metallic plate is provided with some second
Manhole, has been welded to connect vertically disposed metal tube, the top surface weldering of metal tube and the second metallic plate at the second manhole
Connect in succession, the tube wall of metal tube is provided with some first rectangular through-holes, and the second metallic plate is provided with some 3rd manholes, gully
Bottom be connected with connecting tube, connecting tube is connected with siphon pipe, and siphon pipe is connected with standpipe, the top of standpipe and Rose Box
Portion is connected, and standpipe is connected with horizontally disposed drainpipe, and drainpipe is connected with city planting ductwork, and drainpipe is provided with non-return
Valve, the inside top surface of Rose Box is fixedly connected with the deflector of spiral setting, and deflector is solid with horizontally disposed 3rd metallic plate
Fixed connection, the 3rd metallic plate is fixedly connected with the inwall of Rose Box, and the center of the 3rd metallic plate is provided with the 4th manhole, the 3rd
The 4th metallic plate is provided with below metallic plate, the 4th metallic plate is provided with some 5th manholes, and the 5th manhole inside is solid
Surely connection filter cotton layer, is provided with some deflection plates being staggered below the 4th metallic plate, and deflection plate is fixed with filtering chamber interior wall
Connection, is fixedly connected with some filters being disposed vertically between two adjacent deflection plates, filter is provided with the second rectangle and leads to
Hole, is provided with active carbon layer inside the second rectangular through-hole, Rose Box is connected by water pipe with cistern, and water pipe is provided with floating
Ball valve, retaining bottom of the tube is connected with outlet pipe, and outlet pipe is provided with stop valve and water pump.
Preferably, the bottom surface of first metallic plate is fixedly connected with sealing ring.
Preferably, being fixedly connected with woven wire inside first rectangular through-hole.
The beneficial effect brought using above-mentioned technical proposal is：The well head of gully is provided with draining in the utility model
Well lid, drainage manhole cover is provided with some first manholes, and partial volume is larger during the first manhole can filter out rainwater
Debris, while the lower water of drainage manhole cover can be made more uniform.The first metallic plate, the first metal are provided with below drainage manhole cover
Plate is provided with some second manholes, and vertically disposed metal tube, metal tube and second have been welded to connect at the second manhole
The top surface of metallic plate is welded to connect, and the tube wall of metal tube is provided with some first rectangular through-holes, and the second metallic plate is provided with some three
Manhole.Rainwater can flow into metal tube by the second manhole.Further, it is fixedly connected inside the first rectangular through-hole
There is woven wire.Woven wire can carry out effective filtering to the debris of small volume in rainwater.Now, the debris for filtering out
The bottom of metal tube can be stayed in, the accumulation due to debris is effectively avoided and influence is produced on filter effect.Gully
Side wall is fixedly connected with locating ring, and the bottom surface of the first metallic plate contacts with the top surface of locating ring.Debris in metal tube are piled up
To a certain extent, in that context it may be convenient to take out the first metallic plate, cleaning work is carried out to metal tube.Further, the first metallic plate
Bottom surface be fixedly connected with sealing ring.Sealing ring can effectively prevent contact surface current of the rainwater from the first metallic plate with locating ring
Walk.Can be flowed out by the 3rd manhole by the rainwater after filtering.The bottom of gully is connected with connecting tube, connecting tube
It is connected with siphon pipe, siphon pipe is connected with standpipe.Connecting tube, siphon pipe and standpipe form dewatering in siphon type structure, this
Structure can accelerate the drainage speed of rainwater.Standpipe is connected with the top of Rose Box.Rainwater by preliminary filtering can lead to
Cross standpipe and quickly flow into Rose Box, carry out the filtering of profound level.The inside top surface of Rose Box is fixedly connected with spiral setting
Deflector, deflector is fixedly connected with horizontally disposed 3rd metallic plate, and the 3rd metallic plate is fixedly connected with the inwall of Rose Box,
The center of the 3rd metallic plate is provided with the 4th manhole.The deflector that spiral is set can significantly accelerate the flowing speed of rainwater
Degree, forms bigger pressure difference, can effectively improve the siphonage of drainage system.By the rainwater for accelerating, can be by the
Four manholes flow out.The 4th metallic plate is provided with below 3rd metallic plate, the 4th metallic plate is provided with some 5th manholes,
Filter cotton layer is fixedly connected inside 5th manhole.Filter cotton layer can carry out effective mistake to silt tiny in rainwater
Filter.4th metallic plate lower section is provided with some deflection plates being staggered, and deflection plate is fixedly connected with filtering chamber interior wall, and deflection plate can
Effectively to increase the flow of rainwater, the filter effect of rainwater is significantly improved.It is fixedly connected between two adjacent deflection plates
Some filters being disposed vertically, filter is provided with the second rectangular through-hole, and active carbon layer is provided with inside the second rectangular through-hole, activity
Layer of charcoal can carry out depth adsorption cleaning treatment to rainwater.Rose Box is connected by water pipe with cistern, by depth mistake
The rainwater of filter is stored in can flowing to cistern by water pipe.Further, water pipe is provided with ball-cock assembly, when reaching
During the water level of regulation, ball-cock assembly is closed, and stops retaining.Now, because standpipe is connected with horizontally disposed drainpipe, drainpipe
It is connected with city planting ductwork, unnecessary rainwater can flow into city planting ductwork by drainpipe.Further, drainpipe is provided with only
Valve is returned, check-valves can effectively prevent the water in city planting ductwork from flowing into Rose Box.Retaining bottom of the tube is connected with outlet pipe, water outlet
Pipe is provided with stop valve and water pump.When the water in needing to use cistern, can open stop valve and water pump carries out rainwater
Recycle.
Brief description of the drawings
Fig. 1 is one structure chart of specific embodiment of the utility model.
Fig. 2 is the structure chart of deflector in one specific embodiment of the utility model.
Fig. 3 is the structure chart of the 3rd metallic plate in one specific embodiment of the utility model.
Fig. 4 is the structure chart of filter in one specific embodiment of the utility model.
Fig. 5 is the structure chart of metal tube in one specific embodiment of the utility model.
Fig. 6 is the connection figure of sealing ring in one specific embodiment of the utility model.
In figure：1st, gully；2nd, drainage manhole cover；3rd, the first manhole；4th, locating ring；5th, the first metallic plate；6th, second
Manhole；7th, metal tube；8th, the second metallic plate；9th, the first rectangular through-hole；10th, the 3rd manhole；11st, connecting tube；12nd, rainbow
Suction pipe；13rd, standpipe；14th, Rose Box；15th, drainpipe；16th, city planting ductwork；17th, check-valves；18th, deflector；19th, the 3rd metal
Plate；20th, the 4th manhole；21st, the 5th manhole；22nd, filter cotton layer；23rd, deflection plate；24th, filter；25th, the second square
Shape through hole；26th, active carbon layer；27th, cistern；28th, water pipe；29th, ball-cock assembly；30th, outlet pipe；31st, stop valve；32nd, water pump；
33rd, sealing ring；34th, woven wire；35th, the 4th metallic plate；36th, rectangular recess；37th, helical groove.
Specific embodiment
The standardized element used in the utility model can commercially, and shaped piece is according to specification and attached
The record of figure can carry out it is customized, the specific connected mode of each part using bolt ripe in the prior art, rivet,
The conventional meanses such as welding, stickup, will not be described in detail herein.
Reference picture 1-6, one specific embodiment of the utility model includes gully 1, and the well head of the gully 1 is provided with
Drainage manhole cover 2, drainage manhole cover 2 is provided with some first manholes 3, and the side wall of gully 1 is fixedly connected with locating ring 4, draining
The lower section of well lid 2 is provided with the first metallic plate 5, and the bottom surface of the first metallic plate 5 is contacted with the top surface of locating ring 4, and the first metallic plate 5 is opened
There are some second manholes 6, vertically disposed metal tube 7, metal tube 7 and second have been welded to connect at the second manhole 6
The top surface of metallic plate 8 is welded to connect, and the tube wall of metal tube 7 is provided with some first rectangular through-holes 9, and the second metallic plate 8 is provided with some
3rd manhole 10, the bottom of gully 1 is connected with connecting tube 11, and connecting tube 11 is connected with siphon pipe 12, siphon pipe
12 are connected with standpipe 13, and standpipe 13 is connected with the top of Rose Box 14, and standpipe 13 is connected with horizontally disposed drainpipe 15
Logical, drainpipe 15 is connected with city planting ductwork 16, and drainpipe 15 is provided with check-valves 17, and the inside top surface of Rose Box 14 is fixed and connected
The deflector 18 of spiral setting is connected to, deflector 18 is fixedly connected with horizontally disposed 3rd metallic plate 19, the 3rd metallic plate 19
Inwall with Rose Box 14 is fixedly connected, and the center of the 3rd metallic plate 19 is provided with the 4th manhole 20, the 3rd metallic plate 19
Lower section is provided with the 4th metallic plate 35, and the 4th metallic plate 35 is provided with some 5th manholes 21, and the inside of the 5th manhole 21 is solid
Surely connection filter cotton layer 22, some deflection plates 23 being staggered, deflection plate 23 and Rose Box are provided with below the 4th metallic plate 35
14 inwalls are fixedly connected, and some filters 24 being disposed vertically, filter are fixedly connected between two adjacent deflection plates 23
24 are provided with the second rectangular through-hole 25, are provided with active carbon layer 26 inside the second rectangular through-hole 25, Rose Box 14 by water pipe 28 with
Cistern 27 is connected, and water pipe 28 is provided with ball-cock assembly 29, and the bottom of water pipe 28 is connected with outlet pipe 30, is set on outlet pipe 30
There are stop valve 31 and water pump 32.The well head of gully 1 is provided with drainage manhole cover 2 in the present embodiment, and drainage manhole cover 2 is provided with some first
Manhole 3, the first manhole 3 can filter out the larger debris of partial volume in rainwater, while drainage manhole cover 2 can be made
Lower water it is more uniform.The lower section of drainage manhole cover 2 is provided with the first metallic plate 5, and it is circular logical that the first metallic plate 5 is provided with some second
Hole 6, has been welded to connect vertically disposed metal tube 7, the top surface welding of the metallic plate 8 of metal tube 7 and second at the second manhole 6
Connection, the tube wall of metal tube 7 is provided with some first rectangular through-holes 9, and the second metallic plate 8 is provided with some 3rd manholes 10.Rain
Water can flow into metal tube 7 by the second manhole 6.Further, it is fixedly connected with wire inside the first rectangular through-hole 9
Net 34.Woven wire 34 can carry out effective filtering to the debris of small volume in rainwater.Now, the debris for filtering out can be with
The bottom of metal tube 7 is stayed in, the accumulation due to debris is effectively avoided and influence is produced on filter effect.The side of gully 1
Wall is fixedly connected with locating ring 4, and the bottom surface of the first metallic plate 5 contacts with the top surface of locating ring 4.Debris heap in metal tube 7
Product is to a certain extent, in that context it may be convenient to take out the first metallic plate 5, cleaning work is carried out to metal tube 7.Further, the first gold medal
The bottom surface for belonging to plate 5 is fixedly connected with sealing ring 33.Sealing ring 33 can effectively prevent rainwater from the first metallic plate 5 and locating ring
4 contact surface flows away.Can be flowed out by the 3rd manhole 10 by the rainwater after filtering.The bottom of gully 1 be connected
Pipe 11 is connected, and connecting tube 11 is connected with siphon pipe 12, and siphon pipe 12 is connected with standpipe 13.Connecting tube 11, siphon pipe 12
Dewatering in siphon type structure is formd with standpipe 13, this structure can accelerate the drainage speed of rainwater.Standpipe 13 and Rose Box 14
Top is connected.Rose Box 14 can quickly be flowed into by standpipe 13 by the rainwater of preliminary filtering, carry out the mistake of profound level
Filter.The inside top surface of Rose Box 14 is fixedly connected with the deflector 18 of spiral setting, deflector 18 and horizontally disposed 3rd gold medal
Category plate 19 is fixedly connected, and the 3rd metallic plate 19 is fixedly connected with the inwall of Rose Box 14, and the center of the 3rd metallic plate 19 is provided with the
Four manholes 20.The deflector 18 that spiral is set can significantly accelerate the flowing velocity of rainwater, form bigger pressure difference, can
To effectively improve the siphonage of drainage system.By the rainwater for accelerating, can be flowed out by the 4th manhole 20.3rd
The lower section of metallic plate 19 is provided with the 4th metallic plate 35, and the 4th metallic plate 35 is provided with some 5th manholes 21, and the 5th is circular logical
Filter cotton layer 22 is fixedly connected inside hole 21.Filter cotton layer 22 can carry out effective filtering to silt tiny in rainwater.The
The lower section of four metallic plate 35 is provided with some deflection plates 23 being staggered, and deflection plate 23 is fixedly connected with the inwall of Rose Box 14, baffling
Plate 23 can effectively increase the flow of rainwater, significantly improve the filter effect of rainwater.It is solid between two adjacent deflection plates 23
Surely some filters 24 being disposed vertically are connected with, filter 24 is provided with the second rectangular through-hole 25, inside the second rectangular through-hole 25
Active carbon layer 26 is provided with, active carbon layer 26 can carry out depth adsorption cleaning treatment to rainwater.Rose Box 14 passes through water pipe 28
It is connected with cistern 27, is stored in can flowing to cistern 27 by water pipe 28 by the rainwater of depth-type filtration.Enter
One step, water pipe 28 is provided with ball-cock assembly 29, and when the water level of regulation is reached, ball-cock assembly 29 is closed, and stops retaining.Now,
Because standpipe 13 is connected with horizontally disposed drainpipe 15, drainpipe 15 is connected with city planting ductwork 16, and unnecessary rainwater can
City planting ductwork 16 is flowed into by drainpipe 15.Further, drainpipe 15 is provided with check-valves 17, and check-valves 17 can be effective
The water that prevents in city planting ductwork 16 flow into Rose Box 14.The bottom of water pipe 28 is connected with outlet pipe 30, and outlet pipe 30 is provided with
Stop valve 31 and water pump 32.When the water in needing to use cistern 27, can open stop valve 31 and water pump 32 carries out rainwater
Recycling.
In addition, the deflector 18 that spiral is set in the present embodiment is provided with some rectangular recess 36, the top of the 3rd metallic plate 19
Face is provided with helical groove 37, and rectangular recess 36 is connected with helical groove 37.In making rainwater due to the deflector 18 that spiral is set
Silt have received the effect of centrifugal force, and rectangular recess 36 can effectively filter out part silt in rainwater.Helical groove 37 can
Certain storage area is provided with for the silt for filtering out, accumulation due to silt is effectively avoided and the flowing to rainwater is caused
Hinder.
Wherein, the devices such as the filter cotton layer, active carbon layer and the ball-cock assembly that are used in the utility model belong to the existing of maturation
Technology, dewatering in siphon type structure has been carried out sufficiently disclosure in the patent document that background technology is quoted, no longer detailed herein
State its concrete structure.
In description of the present utility model, it is to be understood that term " longitudinal direction ", " transverse direction ", " on ", D score, " preceding ",
" afterwards ", the orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " be based on
Orientation shown in the drawings or position relationship, are for only for ease of description the utility model, rather than the dress for indicating or implying meaning
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.
General principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.The utility model
Claimed scope is by appending claims and its equivalent thereof.
Claims (3)
1. a kind of dewatering in siphon type filter for urban road, including gully（1）, it is characterised in that：The draining
Well（1）Well head be provided with drainage manhole cover（2）, drainage manhole cover（2）It is provided with some first manholes（3）, gully（1）Side wall
It is fixedly connected with locating ring（4）, drainage manhole cover（2）Lower section be provided with the first metallic plate（5）, the first metallic plate（5）Bottom surface with
Locating ring（4）Top surface contact, the first metallic plate（5）It is provided with some second manholes（6）, the second manhole（6）Place's weldering
Vertically disposed metal tube is connected in succession（7）, metal tube（7）With the second metallic plate（8）Top surface be welded to connect, metal tube（7）
Tube wall be provided with some first rectangular through-holes（9）, the second metallic plate（8）It is provided with some 3rd manholes（10）, gully（1）
Bottom and connecting tube（11）It is connected, connecting tube（11）With siphon pipe（12）It is connected, siphon pipe（12）With standpipe（13）Phase
Connection, standpipe（13）With Rose Box（14）Top be connected, standpipe（13）With horizontally disposed drainpipe（15）It is connected, arranges
Water pipe（15）With city planting ductwork（16）It is connected, drainpipe（15）It is provided with check-valves（17）, Rose Box（14）Inside top surface
It is fixedly connected with the deflector of spiral setting（18）, deflector（18）With horizontally disposed 3rd metallic plate（19）It is fixedly connected,
3rd metallic plate（19）With Rose Box（14）Inwall be fixedly connected, the 3rd metallic plate（19）Center be provided with the 4th manhole
（20）, the 3rd metallic plate（19）Lower section be provided with the 4th metallic plate（35）, the 4th metallic plate（35）It is provided with some five circular logical
Hole（21）, the 5th manhole（21）Inside is fixedly connected filter cotton layer（22）, the 4th metallic plate（35）Lower section is provided with some friendships
The deflection plate that mistake is set（23）, deflection plate（23）With Rose Box（14）Inwall is fixedly connected, two adjacent deflection plates（23）It
Between be fixedly connected with some filters being disposed vertically（24）, filter（24）It is provided with the second rectangular through-hole（25）, the second rectangle
Through hole（25）Inside is provided with active carbon layer（26）, Rose Box（14）By water pipe（28）With cistern（27）It is connected, retaining
Pipe（28）It is provided with ball-cock assembly（29）, water pipe（28）Bottom is connected with outlet pipe（30）, outlet pipe（30）It is provided with stop valve
（31）And water pump（32）.
2. the dewatering in siphon type filter for urban road according to claim 1, it is characterised in that：Described first
Metallic plate（5）Bottom surface be fixedly connected with sealing ring（33）.
3. the dewatering in siphon type filter for urban road according to claim 1, it is characterised in that：Described first
Rectangular through-hole（9）Inside is fixedly connected with woven wire（34）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621309150.1U CN206267231U (en) | 2016-12-01 | 2016-12-01 | A kind of dewatering in siphon type filter for urban road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621309150.1U CN206267231U (en) | 2016-12-01 | 2016-12-01 | A kind of dewatering in siphon type filter for urban road |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206267231U true CN206267231U (en) | 2017-06-20 |
Family
ID=59043215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621309150.1U Expired - Fee Related CN206267231U (en) | 2016-12-01 | 2016-12-01 | A kind of dewatering in siphon type filter for urban road |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206267231U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700763A (en) * | 2017-10-18 | 2018-02-16 | 重庆邮电大学 | A kind of gutter of adaptive-flow |
| CN108589890A (en) * | 2018-05-14 | 2018-09-28 | 慈溪市启承机械科技有限公司 | A kind of dewatering in siphon type equipment |
| CN111155626A (en) * | 2018-11-07 | 2020-05-15 | 宁波大学 | Device capable of automatically dredging drainage inlet at sewer culvert opening |
-
2016
- 2016-12-01 CN CN201621309150.1U patent/CN206267231U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700763A (en) * | 2017-10-18 | 2018-02-16 | 重庆邮电大学 | A kind of gutter of adaptive-flow |
| CN108589890A (en) * | 2018-05-14 | 2018-09-28 | 慈溪市启承机械科技有限公司 | A kind of dewatering in siphon type equipment |
| CN111155626A (en) * | 2018-11-07 | 2020-05-15 | 宁波大学 | Device capable of automatically dredging drainage inlet at sewer culvert opening |
| CN111155626B (en) * | 2018-11-07 | 2021-07-20 | 宁波大学 | Device capable of automatically dredging drainage inlet at sewer culvert opening |
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| 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: 20170620 Termination date: 20171201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |