CA2122950A1 - Method for unclogging pumps in a pumping system, and a valving arrangement therefor - Google Patents
Method for unclogging pumps in a pumping system, and a valving arrangement thereforInfo
- Publication number
- CA2122950A1 CA2122950A1 CA002122950A CA2122950A CA2122950A1 CA 2122950 A1 CA2122950 A1 CA 2122950A1 CA 002122950 A CA002122950 A CA 002122950A CA 2122950 A CA2122950 A CA 2122950A CA 2122950 A1 CA2122950 A1 CA 2122950A1
- Authority
- CA
- Canada
- Prior art keywords
- piping
- fluid flow
- pumps
- conduits
- valving
- 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.)
- Abandoned
Links
- 238000005086 pumping Methods 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 12
- 239000012530 fluid Substances 0.000 claims description 31
- 230000000295 complement effect Effects 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 description 9
- 239000010865 sewage Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/175—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by using materials which fill a space around the pipe before hardening
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/22—Adaptations of pumping plants for lifting sewage
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- Pipeline Systems (AREA)
Abstract
Abstract of the Invention Two or more pumps operating in parallel, and conducting effluent via parallel conduits, have a shunt line interconnecting the conduits, and the shunt line is interposed by pair of valves. Each valve permits flow therethrough in one direction which is opposite the flow-permitting direction of the other, but are oper-ative to permit flow therethrough in both directions. By opening one valve to bi-directional flow, and operating a complementary one of the pumps, shunted effluent conducts through the valves and down through the other pump or pumps to dislodge objects which clog the inlet(s) thereof.
Description
212 2 9 5 0 G. 8jorkander -2-4 A METHOD FOR UNCLOGGING PUMPS
rN A PUMPING SYSTEMi, AND
V~LVING ARRANGEMENT THEREFOR
~ackground of the Invention ~his invention pertains to pumping systems having a plurality of pump~, which pumps are susceptible to getting clogged, and in particular to a method for unclogging such pumps, and also to a valving arrangement useful in the method.
The invention, by way of example, has especial application in municipal sewage systems which employ pumping systems for evacuating waste wa~er from system tanks or reservoirs~ Such sewage systems commonly have sewage or waste water inlets which conduct the ~ewage and/or waste water to the tanks or reservoirs, and the latter have submersible pumps therein which, when the level of sewage or waste water becomes considerable, the pumps operate to evacuate the tank or reservoir contents or simply to lower the level thereof.
Sewage and waste water always contain pollutants such as sludge, and elongated objects, i.e., ragQ and the like, which all too easily clog the pumps and piping.
In order to diminish this problem, prior art arrangements design the hydraulic parts of the pumps with very large inl2ts and outlets and having cutting means for subdividing the troublesome, elongated objects into manageable pieces. An example of this is shown in Swedish Patent No. 820 5774-6.
In order to diminish the likelihood of sludge banks building up in the sewage system pumping stations, it is a known practice to employ special mixers or valves which, during certain periods of time, effect an agitation of the waste water. The Swedish Patent No. 8900597-9 discloses an example of this arrangement.
There is yet another method which is used to remove the troublesome, elongated objects from pump inlets. This is to operate the pump or pumps in reverse, for a short period of time, before commencing the customary, forward-pumping operation.
In thi~ way, rag~ and the like, which are at the pump inlet will be flushed away.
~ - 1 -~.~
~i'' ' ~
~ 2122950 The instant invention discloses a novel method for unclogging pumps in a pumping system, as well as a valving arrang~ment therefor, of simple, e~ficient,and inexpe~sive character.
Summary of the Invention It is an object of this invention, particularly, to set forth, or a pumping system having (a) a plurality of pumps, and (b) an outlet conduit coupled to each pump of said plurality, a valving arrangement operative for unclogging pumps of said plurality, comprising shunt piping for connecting said conduits -together for co~mon ~luid flow therebetween; and valving means, interposed in Raid piping, operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits.
Too, it is an object of this invention to disclose a method for unclogging pumps in a pumping system, the system having a plurality of pumps, and each pump having an outlet conduit, comprising the steps of connecting the outlet conduits together, for common ~luid flow therebetween, with shunt piping; interposing Ln said piping a valving means which is operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits; operating said valving means in said second mode; and operating one of the pumps of the plurality.
Further objects of this invention, as well as the novel features and pro-cedural steps thereof, will become apparent by reference to the following description, taken in conjunction with the accompanying figures.
Brief Description of the Drawings Figure 1 is a schematic diagram of the novel valving arrangement, according to an embodiment thereof; and Figure 2 is a flow or block diagram of the steps in the inventive method, again according to an embodiment thereof.
rN A PUMPING SYSTEMi, AND
V~LVING ARRANGEMENT THEREFOR
~ackground of the Invention ~his invention pertains to pumping systems having a plurality of pump~, which pumps are susceptible to getting clogged, and in particular to a method for unclogging such pumps, and also to a valving arrangement useful in the method.
The invention, by way of example, has especial application in municipal sewage systems which employ pumping systems for evacuating waste wa~er from system tanks or reservoirs~ Such sewage systems commonly have sewage or waste water inlets which conduct the ~ewage and/or waste water to the tanks or reservoirs, and the latter have submersible pumps therein which, when the level of sewage or waste water becomes considerable, the pumps operate to evacuate the tank or reservoir contents or simply to lower the level thereof.
Sewage and waste water always contain pollutants such as sludge, and elongated objects, i.e., ragQ and the like, which all too easily clog the pumps and piping.
In order to diminish this problem, prior art arrangements design the hydraulic parts of the pumps with very large inl2ts and outlets and having cutting means for subdividing the troublesome, elongated objects into manageable pieces. An example of this is shown in Swedish Patent No. 820 5774-6.
In order to diminish the likelihood of sludge banks building up in the sewage system pumping stations, it is a known practice to employ special mixers or valves which, during certain periods of time, effect an agitation of the waste water. The Swedish Patent No. 8900597-9 discloses an example of this arrangement.
There is yet another method which is used to remove the troublesome, elongated objects from pump inlets. This is to operate the pump or pumps in reverse, for a short period of time, before commencing the customary, forward-pumping operation.
In thi~ way, rag~ and the like, which are at the pump inlet will be flushed away.
~ - 1 -~.~
~i'' ' ~
~ 2122950 The instant invention discloses a novel method for unclogging pumps in a pumping system, as well as a valving arrang~ment therefor, of simple, e~ficient,and inexpe~sive character.
Summary of the Invention It is an object of this invention, particularly, to set forth, or a pumping system having (a) a plurality of pumps, and (b) an outlet conduit coupled to each pump of said plurality, a valving arrangement operative for unclogging pumps of said plurality, comprising shunt piping for connecting said conduits -together for co~mon ~luid flow therebetween; and valving means, interposed in Raid piping, operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits.
Too, it is an object of this invention to disclose a method for unclogging pumps in a pumping system, the system having a plurality of pumps, and each pump having an outlet conduit, comprising the steps of connecting the outlet conduits together, for common ~luid flow therebetween, with shunt piping; interposing Ln said piping a valving means which is operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits; operating said valving means in said second mode; and operating one of the pumps of the plurality.
Further objects of this invention, as well as the novel features and pro-cedural steps thereof, will become apparent by reference to the following description, taken in conjunction with the accompanying figures.
Brief Description of the Drawings Figure 1 is a schematic diagram of the novel valving arrangement, according to an embodiment thereof; and Figure 2 is a flow or block diagram of the steps in the inventive method, again according to an embodiment thereof.
^` 21229~0 ~etailed Description of the Preferred Embodiment With reference to Figure 1, the valving arrangement 10, in an embodiment thereof, comprises a shunt piping 12 which, at opposite ends thereof, is in through connection with outlet conduits 14 and 16, the latter proceeding from the outlets of pumps 18 a~d 20, respectively. Interposed in piping 12, in confronting relationship, are two valves 22 and 24. Valve 22 acco~modates fluid flow therethrough to the right (as viewed in Figure 1), i.e., from conduit 14 to valve 24. However, it normally prohibit~ flow therethrough to the left, but can be operated or manipulated (by means not shown) to permit flow therethrough from valve 24 to conduit 14. Similarly, valve 24 accommodates fluid flow therethroughto the left, i.e., from conduit 16 to valve 22. It normally prohibits flow therethrough to the right, but also can ~e operated or manipulated to permit flow therethrough from valve 22 to conduit 16.
The pumps 18 and 20 draw fluid, for instance waste water, by way o~ example, from tanks 26 and 28, resp~?ctively, via inlets 30 and 3?.. Remote ends of the conduits 14 and 16 have check ~alves 34 and 36 interposed therein to prevent a reverse flow of fluid therethrough. Ends of the conduits 14 and 16 commun-icate, commonly, with a discharge line 38. -The tanks 26 and 28 are shown as independent. However, they could just as welL comprise a single tank, as indicated by the dash-dot line extending therebetween. Tanks 14 and 16, for instance, could simply be a single tank in a waste water pumping station. Too, the tanks could represent independent, parallel systems and, instead of conduits 14 and 16 joining the discharge line 38, they could independently discharge their separate effluents. In either arrangement, the invention serves just as well. ~
For illustrative purposes, it is assumed that the invention is employed in ~;
a waste water or sewage pumping station. Upon the liquid level of the effluent, i.e., waste water, sewage, and such, reaching to some height in a tank 26 or 2B, or a common tank, one of the pumps 18 or 20 is turned on to discharge some or all of the tank-confined effluent. If tank 26 is the one involved, and pump 18 is turned on, then valve 24 is also operated (by means ,:\.
21229~0 not shown) to accommodate fluid flow therethrough from ualve 22 to conduit 16.
Consequently, a portion of the effluent which is pumped through conduit 14 is tapped off by the shunt piping 12, conducted through the valves 22 and 24, and down through conduit 16. This shunted effluent enters the pump 20 and courses therethrough in a reverse mode to dislodge from the inlet 30 any troublesome, elongated, pump clogging substances.
After a period of time, w~ich may be regulated by an adjustable control, the shunting of the effluent is halted, and the pumping via pump 18 proceeds with all of the effluent being conveyed to the line 38.
In systems which employ two pumps, such as pumps 18 and 20, or three or more, to evacuate effluent from a tank, it can be arranged that, on start-up, the act~vated pumps are rotated in turn, i.e, pump 18 one time, pump 20 the next time, and 90 on.
A key to the inven~ion, of course is the connecting together, with shunt piping 12 the parallel conduits 14 and 16, and interposing the valves 22 and 24 in the shunt piping. Clearly, then, only one of the valve3 22 and 24 has to be operated to penmit fluid flow between the conduits 14 and 16, and ~he complementary pump 18 or 20 turned on.
., .
While I have described my invention in connection with a speciflc embodiment thereof, and by detailing given steps in the method of its practice, it is to be clearly understood that this is done only by way of e~ample, and not as a limitation to the scope of the invention as set forth in the objects thereof and in the appended claims.
. - 4 -
The pumps 18 and 20 draw fluid, for instance waste water, by way o~ example, from tanks 26 and 28, resp~?ctively, via inlets 30 and 3?.. Remote ends of the conduits 14 and 16 have check ~alves 34 and 36 interposed therein to prevent a reverse flow of fluid therethrough. Ends of the conduits 14 and 16 commun-icate, commonly, with a discharge line 38. -The tanks 26 and 28 are shown as independent. However, they could just as welL comprise a single tank, as indicated by the dash-dot line extending therebetween. Tanks 14 and 16, for instance, could simply be a single tank in a waste water pumping station. Too, the tanks could represent independent, parallel systems and, instead of conduits 14 and 16 joining the discharge line 38, they could independently discharge their separate effluents. In either arrangement, the invention serves just as well. ~
For illustrative purposes, it is assumed that the invention is employed in ~;
a waste water or sewage pumping station. Upon the liquid level of the effluent, i.e., waste water, sewage, and such, reaching to some height in a tank 26 or 2B, or a common tank, one of the pumps 18 or 20 is turned on to discharge some or all of the tank-confined effluent. If tank 26 is the one involved, and pump 18 is turned on, then valve 24 is also operated (by means ,:\.
21229~0 not shown) to accommodate fluid flow therethrough from ualve 22 to conduit 16.
Consequently, a portion of the effluent which is pumped through conduit 14 is tapped off by the shunt piping 12, conducted through the valves 22 and 24, and down through conduit 16. This shunted effluent enters the pump 20 and courses therethrough in a reverse mode to dislodge from the inlet 30 any troublesome, elongated, pump clogging substances.
After a period of time, w~ich may be regulated by an adjustable control, the shunting of the effluent is halted, and the pumping via pump 18 proceeds with all of the effluent being conveyed to the line 38.
In systems which employ two pumps, such as pumps 18 and 20, or three or more, to evacuate effluent from a tank, it can be arranged that, on start-up, the act~vated pumps are rotated in turn, i.e, pump 18 one time, pump 20 the next time, and 90 on.
A key to the inven~ion, of course is the connecting together, with shunt piping 12 the parallel conduits 14 and 16, and interposing the valves 22 and 24 in the shunt piping. Clearly, then, only one of the valve3 22 and 24 has to be operated to penmit fluid flow between the conduits 14 and 16, and ~he complementary pump 18 or 20 turned on.
., .
While I have described my invention in connection with a speciflc embodiment thereof, and by detailing given steps in the method of its practice, it is to be clearly understood that this is done only by way of e~ample, and not as a limitation to the scope of the invention as set forth in the objects thereof and in the appended claims.
. - 4 -
Claims (9)
1. A valving arragement, in a pumping system, operative for unclogging a pump, comprising:
a plurality of pumps; wherein each of said pumps has an outlet conduit coupled thereto; and shunt piping connecting said conduits together for common fluid flow therebetween; and valving means, interposed in said piping, operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits.
a plurality of pumps; wherein each of said pumps has an outlet conduit coupled thereto; and shunt piping connecting said conduits together for common fluid flow therebetween; and valving means, interposed in said piping, operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits.
2. A valving arrangement, according to claim 1, wherein:
said valving means comprises a valve which prohibits fluid flow through said piping in a first direction, and accommodates fluid flow through said piping in a second, opposite direction.
said valving means comprises a valve which prohibits fluid flow through said piping in a first direction, and accommodates fluid flow through said piping in a second, opposite direction.
3. A valving arrangement, according to claim 2, wherein:
said valving means further comprises a second valve which accommodates fluid flow through said piping in said first direction, and prohibits fluid flow through said piping in said second, opposite direction.
said valving means further comprises a second valve which accommodates fluid flow through said piping in said first direction, and prohibits fluid flow through said piping in said second, opposite direction.
4. For a pumping system having (a) a plurality of pumps, and (b) an outlet conduit coupled to each pump of said plurality, a valving arrangement operative for unclogging pumps of said plurality, comprising:
shunt piping for connecting said conduits together for common fluid flow therebetween; and valving means, interposed in said piping, operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits.
shunt piping for connecting said conduits together for common fluid flow therebetween; and valving means, interposed in said piping, operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits.
5. A valving arrangement, according to claim 4, wherein:
said valving means comprises a valve which prohibits fluid flow through said piping in a first direction, and accommodates fluid flow through said piping in a second, opposite direction.
said valving means comprises a valve which prohibits fluid flow through said piping in a first direction, and accommodates fluid flow through said piping in a second, opposite direction.
6. A valving arrangement, according to claim 5, wherein:
said valving means further comprises a second valve which accommodates fluid flow through said piping in said first direction, and prohibits fluid flow through said piping in said second, opposite direction.
said valving means further comprises a second valve which accommodates fluid flow through said piping in said first direction, and prohibits fluid flow through said piping in said second, opposite direction.
7. A method for unclogging pumps in a pumping system, the system having (a) a plurality of pumps, and (b) each pump having an outlet conduit, comprisingthe steps of:
connecting the outlet conduits together, for common fluid flow therebetween, with shunt piping;
interposing in said piping a valving means which is operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits;
operating said valving means in said second mode; and operating one of the pumps of the plurality.
connecting the outlet conduits together, for common fluid flow therebetween, with shunt piping;
interposing in said piping a valving means which is operative in a first mode for prohibiting fluid flow between said conduits, and operative in a second mode for accommodating fluid flow between said conduits;
operating said valving means in said second mode; and operating one of the pumps of the plurality.
8. A method, according to claim 7, wherein:
said interposing step comprises interposing in said piping a valve which prohibits fluid flow through said piping in a first direction, and accommodates fluid flow through said piping in a second, opposite direction.
said interposing step comprises interposing in said piping a valve which prohibits fluid flow through said piping in a first direction, and accommodates fluid flow through said piping in a second, opposite direction.
9. A method, according to claim 8, wherein:
said interposing step further comprises interposing in said piping a valve which accommodates fluid flow through said piping in said first direction, and prohibits fluid flow through said piping in said second, oppositedirection.
said interposing step further comprises interposing in said piping a valve which accommodates fluid flow through said piping in said first direction, and prohibits fluid flow through said piping in said second, oppositedirection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9301503A SE9301503L (en) | 1993-05-03 | 1993-05-03 | Method for preventing leakage to / from non-pressurized pipes, preferably waste and storm water pipes |
| SE9301403-3 | 1993-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2122950A1 true CA2122950A1 (en) | 1994-11-14 |
Family
ID=20389803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002122950A Abandoned CA2122950A1 (en) | 1993-05-03 | 1994-05-05 | Method for unclogging pumps in a pumping system, and a valving arrangement therefor |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2122950A1 (en) |
| SE (1) | SE9301503L (en) |
-
1993
- 1993-05-03 SE SE9301503A patent/SE9301503L/en not_active Application Discontinuation
-
1994
- 1994-05-05 CA CA002122950A patent/CA2122950A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| SE9301503L (en) | 1994-11-04 |
| SE9301503D0 (en) | 1993-05-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |