CN107254910A - It is applicable the integrated lifting means of scattering sewage treatment facility sewage discharge and method - Google Patents
It is applicable the integrated lifting means of scattering sewage treatment facility sewage discharge and method Download PDFInfo
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- CN107254910A CN107254910A CN201710642616.2A CN201710642616A CN107254910A CN 107254910 A CN107254910 A CN 107254910A CN 201710642616 A CN201710642616 A CN 201710642616A CN 107254910 A CN107254910 A CN 107254910A
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- Prior art keywords
- sewage
- pit shaft
- lifting means
- treatment facility
- sewage treatment
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- 239000010865 sewage Substances 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000005484 gravity Effects 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000007667 floating Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 73
- 239000002689 soil Substances 0.000 claims description 13
- 230000002262 irrigation Effects 0.000 claims description 6
- 238000003973 irrigation Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000010354 integration Effects 0.000 abstract description 3
- 238000011835 investigation Methods 0.000 abstract description 3
- 238000012876 topography Methods 0.000 abstract description 3
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- 239000010840 domestic wastewater Substances 0.000 abstract description 2
- 239000003657 drainage water Substances 0.000 abstract description 2
- 238000012279 drainage procedure Methods 0.000 description 5
- 208000034699 Vitreous floaters Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 235000020681 well water Nutrition 0.000 description 3
- 239000002349 well water Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/22—Adaptations of pumping plants for lifting sewage
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sewage (AREA)
Abstract
The present invention is for villages and small towns dispersant type domestic wastewater processing technology field, the Upgrade Problem rationally discharged after sewage disposal.The present invention proposes a kind of integrated lifting means of applicable scattering sewage treatment facility sewage discharge and method, on the basis of fully investigation sewage disposal drainage character, root is according to rural area topography and geomorphology and sewage treatment facility present situation of drainage, propose the concept of " integration lifting ", a kind of lifting means discharged as sewage disposal, the processing equipment mainly includes housing, check valve, submersible sewage pump, Floating Ball Liquid Level.Method and system are the lifting means constituted using submersible sewage pump and housing, the discharge of sewage when completing that gravity drainage or the rise of drainage water level can not be realized.Equipment proposed by the present invention, method and pattern are a kind of professional lifting means, method and patterns for being handled for villages and small towns decentralized type sewage in discharge process; rural sewage treatment equipment is adapted to; the normal operation of sewage disposal device is ensure that, environment is protected.
Description
Technical field
The invention belongs to small-sized resident living technical field of sewage, and in particular to the processing discharge of rural area decentralized type sewage
System.
Background technology
With villages and small towns expanding economy, sewage has had a strong impact on the water body environment in rural area.In recent years, it is adaptation rural area
Relative distribution living environment, small-sized distributing buried sewage treatment equipment is used widely.After being handled through equipment
Sewage is directly discharged to river course or irrigation canals and ditches.But there is also two problems in discharge process：One is that drainage point physical features is higher,
It can not realize that gravity is discharged；Two are realized after gravity discharge, and in the season that rainfall is plentiful, the rise of water level easily causes equipment
Pour in down a chimney.This 2 factors can cause sewage disposal device can not realize normal processing function, have a strong impact on equipment operation and
The life of resident.Similar specialized hoisting device is there is no in the market, it is simple to install valve additional and also influence whole draining
Flow.
The content of the invention
The present invention is on the basis of fully investigation sewage disposal drainage character, according to rural area treatment facility present situation, it is proposed that
The concept of " integrated lifting means ", the lifting means discharged as a kind of sewage disposal, the processing equipment includes housing, unidirectional
Valve, submersible sewage pump, Floating Ball Liquid Level.
The technical solution adopted by the present invention is as follows：
A kind of integrated lifting means of applicable scattering sewage treatment facility sewage discharge, including pit shaft, in described well
Water inlet pipe is installed in the side of cylinder, and in described wellbore bottom provided with a water pump, described water pump connection lifting water pipe is described
Lifting water pipe is extended to outside pit shaft from bottom to top；And it is provided with high water level ball float and low in the setting direction of described lifting water pipe
Water level float；When gravity drainage can not be realized, treated sewage, then will by submersible sewage pump directly by being drained into pit shaft
Sewage after processing is directly discharged to accepting regions.
Further, a described pit shaft part is embedded in the soil body, and another part exposes in atmosphere, and its top is provided with one
Individual well lid.
Further, described riser is extended to after upper wellbore from top to bottom, horizontal through the side of pit shaft and well lid
Wall, is then extend downwardly in the soil body, then horizontal-extending, and sewage is discharged.
Further, described wellbore bottom is provided with bed course, and pit shaft is fixed on bed course.
A kind of integrated lifting means of applicable scattering sewage treatment facility sewage discharge, including pit shaft, in described well
Water inlet pipe is installed in the side of cylinder, and relative opposite side is provided with drainpipe, and the setting height of drainpipe is lower than water inlet pipe；Institute
The wellbore bottom stated is extended to from bottom to top provided with a water pump, described water pump connection lifting water pipe, described lifting water pipe
Outside pit shaft；And it is provided with high water level ball float and low water level ball float in the setting direction of described lifting water pipe.
Further, check valve is provided with described drainpipe.
Further, a described pit shaft part is embedded in the soil body, and another part exposes in atmosphere, and its top is provided with one
Individual well lid.
Further, described riser is extended to after upper wellbore from top to bottom, horizontal through the side of pit shaft and well lid
Wall, is then extend downwardly in the soil body, then horizontal-extending, and sewage is discharged.
Further, described wellbore bottom is provided with bed course, and pit shaft is fixed on bed course.
Further, the height of described water inlet pipe and outlet pipe is above the position where high water level liquid-level floater.
Specifically operating procedure is：
When gravity drainage can be realized, treated sewage is directly discharged to river by water inlet pipe and outlet pipe and check valve
Road or irrigation canals and ditches；Once draining " received region " water level goes up, when pouring in down a chimney, closed check valve, the implementation of outside sewage is dammed；
And the sewage after processing is then drained into pit shaft by pipeline, and the startup of submersible sewage pump is controlled according to Floating Ball Liquid Level, proper drainage is realized；
After extraneous water level decreasing, check valve is opened, and realizes proper drainage.
The advantage of the invention is that：
(1) present invention is by setting submersible sewage pump, pit shaft and riser etc. to solve one or more decentralized processing equipment
The problem of gravity drainage is not smooth；
(2) the problem of present invention solves in actual drainage procedure river or other backings up of sewage；
(3) when usually there is water level rise and impeded drainage outside dead status, sewage " accepting regions " in submersible sewage pump
Unlatching is used, and water level voluntarily carries out gravity drainage after recovering.
(4) whole drainage procedure is simple and easy to do without on duty, fully automated control.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described.
Fig. 1 is present invention lifting schematic diagram completely；
Fig. 2 is that reverse-filling of the present invention lifts schematic diagram；
In figure：1 well lid, 2 pit shafts, 3 submersible sewage pumps, 4 lifting water pipes, 5 liquid-level floaters, 6 water inlet pipes, 7 bed courses, 8 bed courses, 9 go out
Water pipe, 10 check valves.
Embodiment
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, there are problems that there is also two in discharge process in the prior art：One is row
Water spot physical features is higher, it is impossible to realize that gravity is discharged；Two are realized after gravity discharge, in the season that rainfall is plentiful, water level it is upper
Rising easily causes equipment to be poured in down a chimney.This 2 factors can cause sewage disposal device can not realize normal processing function, serious shadow
Ring the operation of equipment and the life of resident.Similar specialized hoisting device is there is no in the market, and simple installs valve additional
The flow of whole draining can be influenceed, in order to solve technical problem as above, the present invention is for the processing of villages and small towns dispersant type domestic wastewater
Technical field, the Upgrade Problem rationally discharged after sewage disposal.The present invention proposes the equipment and mould of a kind of " integration lifting "
Formula, on the basis of fully investigation sewage disposal drainage character, root is existing according to rural area topography and geomorphology and sewage treatment facility draining
Shape, it is proposed that a kind of concept of " integration lifting ", the lifting means discharged as sewage disposal, processing equipment mainly includes
Housing, check valve, submersible sewage pump, Floating Ball Liquid Level.Method and system are the lifting means constituted using submersible sewage pump and housing, complete nothing
The discharge of sewage when method realizes gravity drainage or the rise of drainage water level.Equipment proposed by the present invention, method and pattern are
A kind of professional lifting means, method and the pattern that are handled for villages and small towns decentralized type sewage in discharge process, have adapted to rural area dirty
Water processing establishment present situation, it is ensured that the normal operation of sewage disposal device, protects environment.
Embodiment 1
As shown in figure 1, the schematic diagram of present invention lifting device completely；Including pit shaft 2, pacify in the side of described pit shaft 2
Water pipe 6 is put into, in described wellbore bottom provided with a submersible sewage pump 3, the described connection of submersible sewage pump 3 lifts water pipe 4, and described carries
Riser pipe 4 is extended to outside pit shaft 2 from bottom to top；And it is provided with the He of high water level ball float 5 in the setting direction of described lifting water pipe
Low water level ball float 5；When gravity drainage can not be realized, then treated sewage pass through latent dirt directly by being drained into pit shaft
Sewage after processing is directly discharged to accepting regions by pump.
Further, the described part of pit shaft 2 is embedded in the soil body, and another part exposes in atmosphere, and its top is provided with
One well lid 1；The aerial part of exposure only accounts for the sub-fraction of whole pit shaft, and its major part is embedded in the soil body.
Further, described riser 4 is extended to after upper wellbore from top to bottom, horizontal through the side of pit shaft and well lid
Wall, is then extend downwardly in the soil body, then horizontal-extending, and sewage is discharged.
Further, the described bottom of pit shaft 2 is provided with bed course, and pit shaft is fixed on bed course.
The present apparatus is mainly applied to that the region of normal gravity draining can not be being realized, independently can make as lifting facility
With.
Pit shaft is embedded in underground, and for accumulating sewage, including fiberglass tank body, PE tank bodies etc., other can store sewage
Tank body, tank body volume can be determined according to water；Submersible sewage pump is installed in housing, for drawing the sewage in housing；Check valve is pacified
At drainpipe, discharged for gravity and prevent sewage backflow from pouring in down a chimney.
Embodiment 2
A kind of integrated lifting means of applicable scattering sewage treatment facility sewage discharge, including pit shaft 2, in described well
Water inlet pipe 6 is installed in the side of cylinder 2, and relative opposite side is provided with drainpipe 9, and the setting height of drainpipe is lower than water inlet pipe；
In described wellbore bottom provided with a water pump, described water pump connection lifting water pipe, described lifting water pipe prolongs from bottom to top
Reach outside pit shaft；And it is provided with high water level ball float and low water level ball float in the setting direction of described lifting water pipe.
Further, check valve 10 is provided with described drainpipe 9.
Further, the described part of pit shaft 2 is embedded in the soil body, and another part exposes in atmosphere, and its top is provided with
One well lid 1.
Further, described riser 4 is extended to after upper wellbore from top to bottom, horizontal through the side of pit shaft and well lid
Wall, is then extend downwardly in the soil body, then horizontal-extending, and sewage is discharged.
Further, the described bottom of pit shaft 2 is provided with bed course 8,9, and pit shaft is fixed on bed course.
Further, the height of described water inlet pipe 6 and outlet pipe 9 is above the position where high water level liquid-level floater.
Proper drainage：Country sewage is discharged into " integrated lifting means " after processing, after certain liquid level is reached,
River or irrigation canals and ditches are drained into through check valve gravity；
Lift draining：
When river (or irrigation canals and ditches) interior water level goes up, can produce pour in down a chimney can not proper drainage, now closed check valve, is discharged into
The sewage of " lifting means " drains into outside after high level is reached by submersible sewage pump, completes whole drainage procedure；When raw sewage discharge
After locating (river or irrigation canals and ditches) water level decreasing and recovering, continue proper drainage process.
Pit shaft is embedded in underground, and for accumulating sewage, including fiberglass tank body, PE tank bodies etc., other can store sewage
Tank body, tank body volume can be determined according to water；Submersible sewage pump is installed in housing, for drawing the sewage in housing；Check valve is pacified
At drainpipe, discharged for gravity and prevent sewage backflow from pouring in down a chimney.
In the Equipment Foundations for the relative distribution that the present invention is used in current villages and small towns sewage disposal, according to rural area topography and geomorphology and
Sewage treatment facility present situation of drainage, the integrated lifting device of proposition, specially a kind of lifting device of villages and small towns decentralized type sewage,
Method, the device includes housing equipment, drainage equipment, valve body equipment；Method and system are to be constituted using submersible sewage pump and housing
Lifting means, completes the discharge of sewage when seasonal water level goes up.
As can be seen from the above description, the application the above embodiments realize following technique effect：
(3) present invention is by setting submersible sewage pump, pit shaft and riser etc. to solve one or more decentralized processing equipment
The problem of gravity drainage is not smooth；
(4) the problem of present invention solves in actual drainage procedure river or other backings up of sewage；
(3) when usually there is water level rise and impeded drainage outside dead status, sewage " accepting regions " in submersible sewage pump
Unlatching is used, and water level voluntarily carries out gravity drainage after recovering.
(4) whole drainage procedure is simple and easy to do without on duty, fully automated control；Equipment proposed by the present invention, method are
A kind of professional lifting means, method and the pattern that are handled for villages and small towns decentralized type sewage in discharge process, have adapted to rural area dirty
Water processing establishment present situation, it is ensured that the normal operation of sewage disposal device, protects environment.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deform still within protection scope of the present invention that creative work can make.
Claims (10)
1. a kind of integrated lifting means of applicable scattering sewage treatment facility sewage discharge, it is characterised in that including pit shaft,
Water inlet pipe is installed in the side of described pit shaft, in described wellbore bottom provided with a water pump, described water pump connection lifting water
Pipe, described lifting water pipe is extended to outside pit shaft from bottom to top；And it is provided with Gao Shui in the setting direction of described lifting water pipe
Position ball float and low water level ball float；When gravity drainage can not be realized, treated sewage is directly by being drained into pit shaft, Ran Houtong
Cross submersible sewage pump and the sewage after processing is directly discharged to accepting regions.
2. the integrated lifting means of a kind of applicable scattering sewage treatment facility sewage discharge as claimed in claim 1, it is special
Levy and be, a described pit shaft part is embedded in the soil body, another part exposes in atmosphere, its top is provided with a well lid.
3. the integrated lifting means of a kind of applicable scattering sewage treatment facility sewage discharge as claimed in claim 1, it is special
Levy and be, described riser is extended to after upper wellbore from top to bottom, horizontal through pit shaft and the side wall of well lid, then downwards
Extend in the soil body, then it is horizontal-extending, sewage is discharged.
4. the integrated lifting means of a kind of applicable scattering sewage treatment facility sewage discharge as claimed in claim 1, it is special
Levy and be, described wellbore bottom is provided with bed course, and pit shaft is fixed on bed course.
5. a kind of integrated lifting means of applicable scattering sewage treatment facility sewage discharge, it is characterised in that including pit shaft,
Water inlet pipe is installed in the side of described pit shaft, and relative opposite side is provided with drainpipe, and water inlet pipe is highly compared in the setting of drainpipe
It is low；In described wellbore bottom provided with water pump, described water pump connection lifting water pipe, described lifting water pipe from it is lower to
On extend to outside pit shaft；And it is provided with high water level ball float and low water level ball float in the setting direction of described lifting water pipe.
6. the integrated lifting means of a kind of applicable scattering sewage treatment facility sewage discharge as claimed in claim 5, it is special
Levy and be, check valve is provided with described drainpipe.
7. the integrated lifting means of a kind of applicable scattering sewage treatment facility sewage discharge as claimed in claim 5, it is special
Levy and be, a described pit shaft part is embedded in the soil body, another part exposes in atmosphere, its top is provided with a well lid.
8. the integrated lifting means of a kind of applicable scattering sewage treatment facility sewage discharge as claimed in claim 5, it is special
Levy and be, described riser is extended to after upper wellbore from top to bottom, horizontal through pit shaft and the side wall of well lid, then downwards
Extend in the soil body, then it is horizontal-extending, sewage is discharged.
9. the integrated lifting means of a kind of applicable scattering sewage treatment facility sewage discharge as claimed in claim 5, it is special
Levy and be, described water inlet pipe and the height of outlet pipe are above the position where high water level liquid-level floater.
10. a kind of work for being applicable the integrated lifting means of scattering sewage treatment facility sewage discharge as claimed in claim 5
Make method, it is characterised in that
When gravity drainage can be realized, treated sewage is directly discharged to river course or irrigation canals and ditches by outlet pipe and check valve；One
Denier draining " received region " water level goes up, when pouring in down a chimney, closed check valve, and the implementation of outside sewage is dammed；And after processing
Sewage is then drained into pit shaft by pipeline, and the startup of submersible sewage pump is controlled according to Floating Ball Liquid Level, proper drainage is realized；Under extraneous water level
After drop, check valve is opened, and realizes proper drainage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642616.2A CN107254910A (en) | 2017-07-31 | 2017-07-31 | It is applicable the integrated lifting means of scattering sewage treatment facility sewage discharge and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642616.2A CN107254910A (en) | 2017-07-31 | 2017-07-31 | It is applicable the integrated lifting means of scattering sewage treatment facility sewage discharge and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107254910A true CN107254910A (en) | 2017-10-17 |
Family
ID=60025270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710642616.2A Pending CN107254910A (en) | 2017-07-31 | 2017-07-31 | It is applicable the integrated lifting means of scattering sewage treatment facility sewage discharge and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107254910A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111287298A (en) * | 2020-03-23 | 2020-06-16 | 张志朋 | Buried rural domestic water supply and drainage full-automatic air pressure emptying and sewage pushing dry toilet reconstruction complete equipment |
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|---|---|---|---|---|
| WO1996019621A1 (en) * | 1994-12-22 | 1996-06-27 | Tarby, Inc. | Improved sewage handling system |
| KR100931674B1 (en) * | 2009-08-25 | 2009-12-14 | 왕건종합건설(주) | A system for sewage disposal |
| CN102797371A (en) * | 2012-08-17 | 2012-11-28 | 上海市城市建设设计研究总院 | Multifunctional water outlet pump room with high level well |
| JP2013199839A (en) * | 2012-03-23 | 2013-10-03 | Kubota Corp | Manhole pump device |
| CN204059567U (en) * | 2014-08-17 | 2014-12-31 | 杭州埃梯梯泵业有限公司 | A kind of energy-conservation prefabricated pumping plant |
| JP2015014088A (en) * | 2013-07-03 | 2015-01-22 | 株式会社荏原製作所 | Underground drainage pump facility |
| CN204570913U (en) * | 2015-03-20 | 2015-08-19 | 中国海诚工程科技股份有限公司 | A kind of energy-conservation lifting appliance for Xia Wa region rain-water drainage |
| CN105275082A (en) * | 2015-10-27 | 2016-01-27 | 泰州晟禾水处理设备制造有限公司 | Liquid conveying device |
| CN205502211U (en) * | 2016-02-29 | 2016-08-24 | 杭州杭开新能源科技股份有限公司 | Integration sewage promotes pump station with biliquid position control system |
-
2017
- 2017-07-31 CN CN201710642616.2A patent/CN107254910A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996019621A1 (en) * | 1994-12-22 | 1996-06-27 | Tarby, Inc. | Improved sewage handling system |
| KR100931674B1 (en) * | 2009-08-25 | 2009-12-14 | 왕건종합건설(주) | A system for sewage disposal |
| JP2013199839A (en) * | 2012-03-23 | 2013-10-03 | Kubota Corp | Manhole pump device |
| CN102797371A (en) * | 2012-08-17 | 2012-11-28 | 上海市城市建设设计研究总院 | Multifunctional water outlet pump room with high level well |
| JP2015014088A (en) * | 2013-07-03 | 2015-01-22 | 株式会社荏原製作所 | Underground drainage pump facility |
| CN204059567U (en) * | 2014-08-17 | 2014-12-31 | 杭州埃梯梯泵业有限公司 | A kind of energy-conservation prefabricated pumping plant |
| CN204570913U (en) * | 2015-03-20 | 2015-08-19 | 中国海诚工程科技股份有限公司 | A kind of energy-conservation lifting appliance for Xia Wa region rain-water drainage |
| CN105275082A (en) * | 2015-10-27 | 2016-01-27 | 泰州晟禾水处理设备制造有限公司 | Liquid conveying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111287298A (en) * | 2020-03-23 | 2020-06-16 | 张志朋 | Buried rural domestic water supply and drainage full-automatic air pressure emptying and sewage pushing dry toilet reconstruction complete equipment |
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Address after: 100089 No. 16 West Fourth Ring Road, Haidian District, Beijing Applicant after: CRRC Corp.,Ltd. Applicant after: CRRC SHANDONG Co.,Ltd. Applicant after: Jiangsu CRRC Huateng Environmental Protection Technology Co.,Ltd. Address before: 100089 No. 16 West Fourth Ring Road, Haidian District, Beijing Applicant before: CRRC Corp.,Ltd. Applicant before: CRRC SHANDONG Co.,Ltd. Applicant before: JIANGSU ZHONGCHE ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. |
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Application publication date: 20171017 |
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