CA1050136A - Signalling elapsed time indicator - Google Patents
Signalling elapsed time indicatorInfo
- Publication number
- CA1050136A CA1050136A CA228,997A CA228997A CA1050136A CA 1050136 A CA1050136 A CA 1050136A CA 228997 A CA228997 A CA 228997A CA 1050136 A CA1050136 A CA 1050136A
- Authority
- CA
- Canada
- Prior art keywords
- switch
- water
- reservoir
- responsive
- predetermined
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/02—Feed or outlet devices; Feed or outlet control devices for feeding measured, i.e. prescribed quantities of reagents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/685—Devices for dosing the additives
- C02F1/686—Devices for dosing liquid additives
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
- G05D11/132—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components by controlling the flow of the individual components
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The disclosed control apparatus for water treatment systems embodies a float switch actuably responsive to a predetermined drop in stored water level causing the pumping of treatment solution to a predetermined rate of flow controlled by a flow orifice for a predetermined period of time when called for by a thus energized clock totalizer embodying cam mechanism therein and a sensitive switch responsive thereto for controlling the flow of treatment solution to the water reservoir proportional to the delivery of make up water controlled by the float switch.
The disclosed control apparatus for water treatment systems embodies a float switch actuably responsive to a predetermined drop in stored water level causing the pumping of treatment solution to a predetermined rate of flow controlled by a flow orifice for a predetermined period of time when called for by a thus energized clock totalizer embodying cam mechanism therein and a sensitive switch responsive thereto for controlling the flow of treatment solution to the water reservoir proportional to the delivery of make up water controlled by the float switch.
Description
1050~36 Background of the ~vention The invention concerns a control apparatus for liquid water treatment svvstems.
Field of the Invention Liquid or solution feeders for water treatment are commonly provided by a device such as a float valve adapted to mechanical valve action to control the head on a flow determined orifice.
Variations of treatment feed or flow can be obtained by changing the head, i.e~ adjusting the operating level of the float feed valves or changing the orifice to a different slze by a selectable flow path through different orifices controlled by a manual valve. In water treatment it is usual to mix the treating chemi~cals in the solution and then to meter the solution to the water to be treated. Present requirements of the control of commercial treatment of waters to render them potable requires controlled additions of treatment chemicals to be accurate within ranges of less than one part per milhon of water treated. Generally, prior art devices relying upon mechanical valving controlled by a float device or the electrical control of the duration of injection of feed treatment water responsive to water level alone does not permit the order of accuracy requlred in present-day water treatment problems on a satisfactory basis of reliable consistancy.
The art in recent years is replete with references dealing with the accurate metering of a treatment solution such as by utillzing a timer relative to a standard orifice and a predetermined pressure to cause a predetermined amount of treatment solution to be delivered to a water reservoir. All that is accomplished by such accurate metering of a treatment solution is the accurate measurement of the ' 11)51V13~i treatment solution and not the accurate measurement OI the treatment of the water in the reservoir by the solution. It i9 at this precise point that the invention diverges markedly from the prior art and causes the amount of treatment solution to be controlled directly by the amount of make up water as the make up water is added thereby eliminating the prior art step of determining from the reservoir the amount of treatment required and then adding an accurate corrective amount of treatment solution .
It is accordingly an object of the invention to provide a system for injecting treating solutions into a water reservoir in which the system is first activated responsive to the water level at some point such as in a water reservoir but thereafter a totalizer having actuating cams driven thereby and activated by a float detected drop in water level activates a valve releasing treating solution through a measured orifice for a predetermined period of time determined by said totalizer thus to provide a measured ~uantity of treating solution responsive only to a predetermined dellvered c~uantity of make up water totalized by said totalizer, the totalizer being de-energized when the float switch cuts off delivery of make up water. Thus it achieves exact injection of treatment solution re9ponsive to the delivery of make up water determined by said float switch.
Summary of the Invention The invention comprises a control apparatus for liquid water treatment systems having in combination a float sen6itive switch responsive to the drop of water level in a water reservoir to a predetermined level; a small tank and housing therefor carrying said float and switch and means for connecting said small tank to a water reservoir whereby the ~L05~)136 water in said small tank drops responsive to a drop in water level in said reservoir, the depth of said small tank defining a water level drop control distance or drop in head. An electric motor actuated totalizer having a digital read out thereon embodies cam devices therein at least one of said cam devices being adapted to determine a predetermined time period during which a sensitive switch actuated thereby is held closed.
Accordingly once said totalizer is actuated the same is adapted to continue in the energized condition for a predetermined period determined by the float switch and to totalize during such time period. Such totalizer switch controls a solenoid actuated water valve which is normally closed but which when energized is open to permit flow of treatment solution pumped by a pump again electrically controlled by said totalizer switch through a flow control orifice at a constant pumping speed determined by said pump thus to cause treatment solution to be communicated through suitable piping connections dlrectly to the water reservoir or to a make up water intermediate reservoir utilized as an intermediate stage if desired according to the requirements of the particular water plant, The invention however permits the direct injection with a high degree of accuracy of those chemical solutions adapted to be added to a water reservoir in relatively high concentration in water solution in such manner that such treatment solution injection is proportional only to totalized make up water delivered to the reservoir.
Brief Description of the Drawings The invention is illustrated in its preferred mode in the accompanying drawings wherein Figure 1 is a general perspective view of an out-of-doors type of water treatment system;
Figure 2 is an exploded view of a totalizer control device according to the invention;
/
1~5a)136 Figure 3 is an enlarged partial section on the line 3-3 of Figure 2;
Figure 4 is a section on the line 4-4 of Figure 3 and revealing an additional section line reference 3-3 for Figure 3;
Figure 5 is a simplified diagrammatic electrically controlled water solution flow diagram.
Detailed Description of the Drawings In Figure 1 is shown a water reservoir 10 having associated therewith a pump house 11 containing a feed unit 12. The feed unit 12 according to the invention embodies control apparatus for liquid water treatment by utilizing a solution feeder by means of which a treatment solution such as a solution containing chlorene at a particular concentration is delivered from the unit 12 to the reservoir 10.
The unit 12 is illustrated irl more detail in Figures
Field of the Invention Liquid or solution feeders for water treatment are commonly provided by a device such as a float valve adapted to mechanical valve action to control the head on a flow determined orifice.
Variations of treatment feed or flow can be obtained by changing the head, i.e~ adjusting the operating level of the float feed valves or changing the orifice to a different slze by a selectable flow path through different orifices controlled by a manual valve. In water treatment it is usual to mix the treating chemi~cals in the solution and then to meter the solution to the water to be treated. Present requirements of the control of commercial treatment of waters to render them potable requires controlled additions of treatment chemicals to be accurate within ranges of less than one part per milhon of water treated. Generally, prior art devices relying upon mechanical valving controlled by a float device or the electrical control of the duration of injection of feed treatment water responsive to water level alone does not permit the order of accuracy requlred in present-day water treatment problems on a satisfactory basis of reliable consistancy.
The art in recent years is replete with references dealing with the accurate metering of a treatment solution such as by utillzing a timer relative to a standard orifice and a predetermined pressure to cause a predetermined amount of treatment solution to be delivered to a water reservoir. All that is accomplished by such accurate metering of a treatment solution is the accurate measurement of the ' 11)51V13~i treatment solution and not the accurate measurement OI the treatment of the water in the reservoir by the solution. It i9 at this precise point that the invention diverges markedly from the prior art and causes the amount of treatment solution to be controlled directly by the amount of make up water as the make up water is added thereby eliminating the prior art step of determining from the reservoir the amount of treatment required and then adding an accurate corrective amount of treatment solution .
It is accordingly an object of the invention to provide a system for injecting treating solutions into a water reservoir in which the system is first activated responsive to the water level at some point such as in a water reservoir but thereafter a totalizer having actuating cams driven thereby and activated by a float detected drop in water level activates a valve releasing treating solution through a measured orifice for a predetermined period of time determined by said totalizer thus to provide a measured ~uantity of treating solution responsive only to a predetermined dellvered c~uantity of make up water totalized by said totalizer, the totalizer being de-energized when the float switch cuts off delivery of make up water. Thus it achieves exact injection of treatment solution re9ponsive to the delivery of make up water determined by said float switch.
Summary of the Invention The invention comprises a control apparatus for liquid water treatment systems having in combination a float sen6itive switch responsive to the drop of water level in a water reservoir to a predetermined level; a small tank and housing therefor carrying said float and switch and means for connecting said small tank to a water reservoir whereby the ~L05~)136 water in said small tank drops responsive to a drop in water level in said reservoir, the depth of said small tank defining a water level drop control distance or drop in head. An electric motor actuated totalizer having a digital read out thereon embodies cam devices therein at least one of said cam devices being adapted to determine a predetermined time period during which a sensitive switch actuated thereby is held closed.
Accordingly once said totalizer is actuated the same is adapted to continue in the energized condition for a predetermined period determined by the float switch and to totalize during such time period. Such totalizer switch controls a solenoid actuated water valve which is normally closed but which when energized is open to permit flow of treatment solution pumped by a pump again electrically controlled by said totalizer switch through a flow control orifice at a constant pumping speed determined by said pump thus to cause treatment solution to be communicated through suitable piping connections dlrectly to the water reservoir or to a make up water intermediate reservoir utilized as an intermediate stage if desired according to the requirements of the particular water plant, The invention however permits the direct injection with a high degree of accuracy of those chemical solutions adapted to be added to a water reservoir in relatively high concentration in water solution in such manner that such treatment solution injection is proportional only to totalized make up water delivered to the reservoir.
Brief Description of the Drawings The invention is illustrated in its preferred mode in the accompanying drawings wherein Figure 1 is a general perspective view of an out-of-doors type of water treatment system;
Figure 2 is an exploded view of a totalizer control device according to the invention;
/
1~5a)136 Figure 3 is an enlarged partial section on the line 3-3 of Figure 2;
Figure 4 is a section on the line 4-4 of Figure 3 and revealing an additional section line reference 3-3 for Figure 3;
Figure 5 is a simplified diagrammatic electrically controlled water solution flow diagram.
Detailed Description of the Drawings In Figure 1 is shown a water reservoir 10 having associated therewith a pump house 11 containing a feed unit 12. The feed unit 12 according to the invention embodies control apparatus for liquid water treatment by utilizing a solution feeder by means of which a treatment solution such as a solution containing chlorene at a particular concentration is delivered from the unit 12 to the reservoir 10.
The unit 12 is illustrated irl more detail in Figures
2 through 5 and depends for its operation upon a totalizer switch device preferably of the form shown in Figures 2 to 4.
The totali~er switch device of the invention camprises a conventional electric clock motor drive unit 13 driving the digital display wheels 14 indicating elapsed units of time i. e. seconds totalled to minutes and hours and convertible to gallons of make u~
water delivered. Such devices are well known and are generally available.
According to the invention however, the digital m echanism drive shaft 15 having gear 16 driven by drive gear 17 extending from time shaft 18 of clock mechanism 13 carries one or more cams 19 therealong between the supports 20 and 21, the latter being fastened in a suitable frame 22 carrying viewing window 23 and timer case 24. Frame 22 supports normally open sensitive switch 25 actuable by the depressible plunger ~136 26 having cam engaging wheel 27 thereon, plunger 26 being supported in mounting sleeve 28 by a compression spring not shown. Base 29 supports time mechanism housing 30 adapted to enclose clock motor mechanism 13, clock housing 24 and frame 22 with the switch 25, Electrical leads (not shown) connect from switch 25 to base socket terrninals 30 and from the motor (not shown~ of clock mechanism 13 to terminal 31 thence through base 29 exteriorly of the latter for connection in the manner to be described.
In Figure 5, 32 is a mercury switch mounted at the hinge point 33 of arm 34 supported by float 35 in water 36 of small control reservoir 37 connected by line 38 to a main or intermediate reservoir 39 whereby a drop in level of water 40 in reservoir 39 from the maximum level 41 to a predetermined lower level 42 causes switch 32 to close which by line 43 connects through switch 32 to voltage supply line 4D~ to energize totalizer clock motor 13. Line 45 connects line 44 to terminal 46 of clock cam switch 25. However, as previously described, clock drive mot or 13 turns shaft 15 causing cam 19 to depress switch actuator plunger 26 to close switch 25. The switch dwell is determined according to the shape of the cam 19 and speed of shaM 18 to cause switch 25 to close for a portion of each revolution of shaM 19, Depending on clock speed of shaft 18 i. e. the particular clock motor selected such interval may be a predetermined portionaE cne hoJr cr of one minute where such time represents a predetermined gallonage of water delivered to the reservoir. Line 47 from switch 25 energizes the constant speed drive motor 48 for pump mechanism 49 and actuates normally closed solenoid valve 50 through line 5i energizing solenoid 52 to permit treating solution to be raised from drum or other reservoir 53 through pump tube 54 to pump head 55 to proceed through a control orifice device 56 of readily available well ~050~36 known construction, thuæ to proceed by delivery line 57 to reservoir water supply line 58. Main water supply line 58 assure6 water delivery thereto by electrically controlled pump 59 controlled by elect~ic line 60 from mercury switch 32 energizjng norm ally closed solenoid valve 61 to permit main water supply water to proceed as make up water through line 58 for delivery through control orifice to reservoir 39.
- In pumping column 54 of pump head 55 a back flow valve device 63 of suitable arrangement is provided such as ball 63 biased in the downward direction by suitable springs 64 normally to maintain the ball valve chamber opening 65 closed whereby pump 55 is maintained primed.
Having regard to the foregoing, it will be appreciated that the invention concerns a system Eor introducing an accurate quantity of treating solution into a water reservoir to which make-up water is added responsive to a predetermined drop in head, said water being added through a control orifice at a predetermined pressure at a constant rate of flowJ and comprising in combination: a tank in liquid communica-tion with said reservoir, the liquid level in said tank corresponding to the liquid level in said reservoir; a normally open liquid level responsive first electrical switch closable upon a drop in liquid level in said tank corresponding to a predetermined drop in head in said reservoir; means for pumping make-up water at a predetermined rate of flow to said reservoir responsive to closure of said switch; a totalizer device including a clock type motor electrically actuated responsive to closure of said switch; totalizer mechanism associated with said motor and driven thereby, said mechanism defining totalizing cycles responsive to a predetermined time base determined by sald motor and responsive to the volume of make-up water delivered to said reservoir through said control orifice; a second normally open electrical switch associated with said totalizing mechanism actuably closable thereby over a predeter-mined portion only of a cycle thereof; a treating solution container and a second electrically actuated pump of constant pressure characteristic for delivering treating solution from said container to said reservoir;
a second control orifice for sald treating solution between said second pump and said reservoir; means for actuating said second pump responsive to closure of said second switch; and means for maintaining such float switch closed until the water level in said reservoir rises to a predetermined lev el .
The totali~er switch device of the invention camprises a conventional electric clock motor drive unit 13 driving the digital display wheels 14 indicating elapsed units of time i. e. seconds totalled to minutes and hours and convertible to gallons of make u~
water delivered. Such devices are well known and are generally available.
According to the invention however, the digital m echanism drive shaft 15 having gear 16 driven by drive gear 17 extending from time shaft 18 of clock mechanism 13 carries one or more cams 19 therealong between the supports 20 and 21, the latter being fastened in a suitable frame 22 carrying viewing window 23 and timer case 24. Frame 22 supports normally open sensitive switch 25 actuable by the depressible plunger ~136 26 having cam engaging wheel 27 thereon, plunger 26 being supported in mounting sleeve 28 by a compression spring not shown. Base 29 supports time mechanism housing 30 adapted to enclose clock motor mechanism 13, clock housing 24 and frame 22 with the switch 25, Electrical leads (not shown) connect from switch 25 to base socket terrninals 30 and from the motor (not shown~ of clock mechanism 13 to terminal 31 thence through base 29 exteriorly of the latter for connection in the manner to be described.
In Figure 5, 32 is a mercury switch mounted at the hinge point 33 of arm 34 supported by float 35 in water 36 of small control reservoir 37 connected by line 38 to a main or intermediate reservoir 39 whereby a drop in level of water 40 in reservoir 39 from the maximum level 41 to a predetermined lower level 42 causes switch 32 to close which by line 43 connects through switch 32 to voltage supply line 4D~ to energize totalizer clock motor 13. Line 45 connects line 44 to terminal 46 of clock cam switch 25. However, as previously described, clock drive mot or 13 turns shaft 15 causing cam 19 to depress switch actuator plunger 26 to close switch 25. The switch dwell is determined according to the shape of the cam 19 and speed of shaM 18 to cause switch 25 to close for a portion of each revolution of shaM 19, Depending on clock speed of shaft 18 i. e. the particular clock motor selected such interval may be a predetermined portionaE cne hoJr cr of one minute where such time represents a predetermined gallonage of water delivered to the reservoir. Line 47 from switch 25 energizes the constant speed drive motor 48 for pump mechanism 49 and actuates normally closed solenoid valve 50 through line 5i energizing solenoid 52 to permit treating solution to be raised from drum or other reservoir 53 through pump tube 54 to pump head 55 to proceed through a control orifice device 56 of readily available well ~050~36 known construction, thuæ to proceed by delivery line 57 to reservoir water supply line 58. Main water supply line 58 assure6 water delivery thereto by electrically controlled pump 59 controlled by elect~ic line 60 from mercury switch 32 energizjng norm ally closed solenoid valve 61 to permit main water supply water to proceed as make up water through line 58 for delivery through control orifice to reservoir 39.
- In pumping column 54 of pump head 55 a back flow valve device 63 of suitable arrangement is provided such as ball 63 biased in the downward direction by suitable springs 64 normally to maintain the ball valve chamber opening 65 closed whereby pump 55 is maintained primed.
Having regard to the foregoing, it will be appreciated that the invention concerns a system Eor introducing an accurate quantity of treating solution into a water reservoir to which make-up water is added responsive to a predetermined drop in head, said water being added through a control orifice at a predetermined pressure at a constant rate of flowJ and comprising in combination: a tank in liquid communica-tion with said reservoir, the liquid level in said tank corresponding to the liquid level in said reservoir; a normally open liquid level responsive first electrical switch closable upon a drop in liquid level in said tank corresponding to a predetermined drop in head in said reservoir; means for pumping make-up water at a predetermined rate of flow to said reservoir responsive to closure of said switch; a totalizer device including a clock type motor electrically actuated responsive to closure of said switch; totalizer mechanism associated with said motor and driven thereby, said mechanism defining totalizing cycles responsive to a predetermined time base determined by sald motor and responsive to the volume of make-up water delivered to said reservoir through said control orifice; a second normally open electrical switch associated with said totalizing mechanism actuably closable thereby over a predeter-mined portion only of a cycle thereof; a treating solution container and a second electrically actuated pump of constant pressure characteristic for delivering treating solution from said container to said reservoir;
a second control orifice for sald treating solution between said second pump and said reservoir; means for actuating said second pump responsive to closure of said second switch; and means for maintaining such float switch closed until the water level in said reservoir rises to a predetermined lev el .
Claims (4)
1. A system for introducing an accurate quantity of treating solution into a water reservoir to which make up water is added responsive to a predetermined drop in head, said water being added through a control orifice at a predetermined pressure at a constant rate of flow, and comprising in combination: a tank in liquid communication with said reservoir the liquid level in said tank corresponding to the liquid level in said reservoir; a normally open liquid level responsive first electrical switch closable upon a drop in liquid level in said tank corresponding to a predetermined drop in head in said reservoir; means for pumping make-up water at a predetermined rate of flow to said reservoir responsive to closure of said switch; a totalizer device including a clock type motor electrically actuated responsive to closure of said switch; totalizer mechanism associated with said motor and driven thereby, said mechanism defining totalizing cycles responsive to a predetermined time base determined by said motor and responsive to the volume of make-up water delivered to said reservoir through said control orifice; a second normally open electrical switch associated with said totalizing mechanism actuably closable thereby over a predetermined portion only of a cycle thereof; a treating solution container and a second electrically actuated pump of constant pressure characteristic for delivering treating solution from said container to said reservoir; a second control orifice for said treating solution between said second pump and said reservoir; means for actuating said second pump responsive to closure of said second switch; and means for maintaining such float switch closed until the water level in said reservoir rises to a predetermined level.
2. The system of Claim 1 and a check valve device associated with said second pump for maintaining the priming thereof.
3. The system of Claim 1 in which said first switch is of the mercury switch type.
4. The system of Claim 1 in which the liquid level responsive first electrical switch comprises a mercury switch, a float arm for tilting said switch and a lost motion mechanism between said float device and said switch for maintaining closure of said switch once actuated by a predetermined drop in liquid level until the water level rises to a predetermined head in said tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA228,997A CA1050136A (en) | 1975-06-10 | 1975-06-10 | Signalling elapsed time indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA228,997A CA1050136A (en) | 1975-06-10 | 1975-06-10 | Signalling elapsed time indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050136A true CA1050136A (en) | 1979-03-06 |
Family
ID=4103298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA228,997A Expired CA1050136A (en) | 1975-06-10 | 1975-06-10 | Signalling elapsed time indicator |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1050136A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4384523A (en) * | 1980-10-23 | 1983-05-24 | Mirachem Corporation | Fountain control system |
-
1975
- 1975-06-10 CA CA228,997A patent/CA1050136A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4384523A (en) * | 1980-10-23 | 1983-05-24 | Mirachem Corporation | Fountain control system |
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