SE414364B

SE414364B - DEVICE FOR AUTOMATIC CONTROL OF A WATER PIPE CONNECTED WATER DEVICE

Info

Publication number: SE414364B
Application number: SE7811004A
Authority: SE
Inventors: Einar Skappel
Original assignee: Einar Skappel
Priority date: 1978-10-23
Filing date: 1978-10-23
Publication date: 1980-07-28
Also published as: NO793390L; JPS56501431A; NO147201B; FI61387B; EP0020558A1; WO1980000777A1; FI793271A; IE792022L; AU544595B2; DK150691B; IE48971B1; DK150691C; ATE2597T1; JPS6261293B2; DK69280A; DE2964919D1; SU1050542A3; BE879589A; AU5207879A; EP0020558B1

Abstract

A main valve (1) is connected into a pressurized water pipe for an irrigation installation and has a valve body (4) formed as a differential piston and with a through bore (5), said body being operated in both directions by means of the water pressure, the piston (4) in one end position closing the water pipe and in its other end position keeping it open. The piston (4) is guided to said end positions by means of a control valve (7) arranged to open or close a duct (6) starting from the major cylinder bore, thereby to cause the water present to actuate the piston (4). The control valve (7) is in turn controlled by rainfall onto, and evaporation from an upwardly open bowl (8), and a drop means (9) active during irrigation. The bowl (8) is part of a tipping means with two tipped end positions, controlled by the quantity of water in the bowl (8). To achieve operation of the main valve (1) such that irrigation substantially takes place at night, and that the length of time between irrigation can be varied, the tipping means is supplemented by a closed air chamber (15) on the other side of the pivoting shaft (35), said chamber and bowl (8) having a common flat bottom (16) and mutual communication via a slit (17) at the bottom. By the volume change in the air enclosed in the air chamber (15), caused by the temperature difference between night and day, the quantity of water contained in the open bowl (8) and in the chamber (15) is displaced at night such that the tipping means tips over into a position opening the main valve (1).

Description

7811004-6 2 Ett anordningen inneslutande hölje 11 är sammansatt av två i var- aandra hopskjutna delar med en i huvudsak plan botten 21 med perfore- ringar 22 och ett tak 33 med en regnvattensamlande försänkning 12, vars i huvudsak plana botten är försedd med perforeringar 13. 7811004-6 2 A device enclosing housing 11 is composed of two interlocking parts with a substantially flat bottom 21 with perforations 22 and a roof 33 with a rainwater collecting recess 12, the substantially flat bottom of which is provided with perforations 13.

Bottnen 21 uppbär en huvudventil 1 med ur höljet ll utskjutande inlopp 2. anordnad att anslutas till en vattenledning, och ett utlopp 3, anordnat att anslutas till en bevattningsanordning (ej visad). Huvud- ventilen 1 innefattar en som en differentialkolv utformad ventilkropp 4 med ett klent, centralt genomlopp 5 till dess storsida, från vilken en kanal 6 går i huvudsak vertikalt till en styrventil 7 med ett vertikalt skaft 25. som uppbär en därpå fäst flottör 26. Denna omslutes av en uppåt öppen. cirkulär skål 27 med ett bräddavlopp 28 och en sidoöppning 29.The bottom 21 carries a main valve 1 with inlet 2 projecting from the housing 11 arranged to be connected to a water pipe, and an outlet 3, arranged to be connected to an irrigation device (not shown). The main valve 1 comprises a valve body 4 designed as a differential piston with a small, central passage 5 to its large side, from which a channel 6 goes substantially vertically to a control valve 7 with a vertical shaft 25. which carries a float 26 attached thereto. This is enclosed by an upward open. circular bowl 27 with a overflow drain 28 and a side opening 29.

Skålens 27 vägg Bh vidgar sig uppåt. Ett lock 30 med en central öppning för skaftet 25 är försett med en i skålen 27 vridbart passande,nedåt- riktad sarg 32 med en klen ränna 31 mittför skålens 27 sidoöppning 29.The bowl's 27 wall bra expands upwards. A lid 30 with a central opening for the shaft 25 is provided with a downwardly directed, downwardly directed rim 32 in the bowl 27 with a small groove 31 opposite the side opening 29 of the bowl 27.

Rännans 31 bredd svarar i huvudsak mot sidoöppningen 29. Tillsammans ut- göra de ett genomlopp till en som en näsa utformad droppanordning 9, vilket genomlopps area kan regleras genom att locket 30 vridas i skålen 27.The width of the gutter 31 substantially corresponds to the side opening 29. Together they form a passage for a drip device 9 designed as a nose, which passage area can be regulated by turning the lid 30 in the bowl 27.

I höljet finnes en vippanordning, bestående av två på ömse sidor om en vippaxel 35 anbragta skålar 8. lt med gemensam, plan botten 16.In the housing there is a tilting device, consisting of two bowls 8 lt arranged on opposite sides of a tilting shaft 35 with a common, flat bottom 16.

Den ena 8 av dessa skålar är öppen uppåt och är belägen under höljets takförsänkning 12 och under droppanordningen 9. Den andra skålen 14 uppbär en sluten luftkammare 15. från vars tak ett som en arm utformat utskott 10 sträcker sig in över skaftet 25. Luftkammaren 15 är förbunden med den öppna skålen 8 medelst en smal. tvärgâende slits 17 invid den gemensamma bottnen 16, och medelst minst en till den öppna skålens 8 motsatta ände gående kanal 18 med en sma1,1ängsgående slits 20 invid bottnen 16. Kanalens 18 tvärsnitt kan vara utformat hur som helst, det enda viktiga är att dess takhöjd stiger kontinuerligt från att vid den öppna skålens 8 bortersta ände vara obetydligt större än slitsens 20 bredd till ett maximum vid dess mynning i luftkammaren 15, varvid myn- ningshöjden bestämmas av den vattenmängd man önskar ha i luftkammaren 15 och av dennas luftvolym. Mynningshöjden måste vara något större än summan av slítsarnas 17, 20 bredd och den maximala skillnaden mellan vattnets i luftkammaren 15 dag- och nattnívåer.One 8 of these bowls is open upwards and is located below the roof recess 12 of the housing and below the drip device 9. The other bowl 14 carries a closed air chamber 15. from the roof of which an arm-shaped projection 10 extends over the shaft 25. The air chamber 15 is connected to the open bowl 8 by means of a narrow one. transverse slot 17 adjacent the common bottom 16, and by means of at least one channel 18 going to the opposite end of the open bowl 8 with a small longitudinal slot 20 adjacent the bottom 16. The cross section of the channel 18 can be designed in any way, the only important thing is that its ceiling height rises continuously from being at the far end of the open bowl 8 insignificantly greater than the width of the slot 20 to a maximum at its mouth in the air chamber 15, the mouth height being determined by the amount of water desired in the air chamber 15 and by its air volume. The mouth height must be slightly greater than the sum of the widths of the slots 17, 20 and the maximum difference between the day and night levels of the water in the air chamber 15.

På höljets 11 botten 21 är under luftkammaränden en trappstegsfor- mad klots 23 så anbrapt. att den kan förskjutas i riktning mot vippaxeln 35.! Anordningen fungerar på följande sätt: 7811004-6 Vi utgår från det läget. att den öppna skålen 8 är full med vatten och har bringat vippanordningen att tippa åt detta håll. Utskottet (ar- men) 10 ligger an mot skaftet 25 så att detta pressar styrventílen 7 tätande mot dess säte. Härigenom kommer trycket mot differentidlkolvens 4 storsida 36 att bli lika med vattenledningstrycket och bringa huvud- ventilen 1 att stänga av tillflödet till bevattningsanläggningen. Flot- törskâlens 27 vatten har från droppanordningen 9 droppat ner i den öpp- na skålen 8. så att flottörskålen 27 är tom och flottörens 26 vikt samverkar med armen 10 i att hålla styrventilen 7 i stängande läge.At the bottom 21 of the housing 11, below the air chamber end, a stepped block 23 is so attached. that it can be displaced in the direction of the rocker shaft 35.! The device works as follows: 7811004-6 We start from that position. that the open bowl 8 is full of water and has caused the tilting device to tip in this direction. The projection (arm) 10 abuts the shaft 25 so that it presses the control valve 7 sealingly against its seat. As a result, the pressure against the large side 36 of the differential piston 4 will be equal to the water line pressure and cause the main valve 1 to shut off the supply to the irrigation system. The water of the float bowl 27 has dripped from the drip device 9 into the open bowl 8. so that the float bowl 27 is empty and the weight of the float 26 cooperates with the arm 10 in holding the control valve 7 in the closed position.

Om nu en uppehållsperiod sätter in, så kommer vattnet i den öppna skålen 8 att avdunsta och avgå genom perforeringarna 13. Härigenom minskar armens 10 tryck mot skaftet 25, medan den i luftkammaren 15 inneslutna vattenmängden förblir i huvudsak oförändrad. Vid ett visst vattenstånd i den öppna skålen 8 kommer det genom differentialkolvens L genomlopp 5 och kanalen 6 till styrventilen 7 fortplantade vatten- trycket att pressa mot styrventilen 7. så att denna öppnar sig något, och släppa in vatten i flottörskålen 27. Flottören 26 pressar skaftet 25 uppåt mot armen 10. så att denna bringar vippanordningen att tippa över mot luftkammarsidan. Genom att flottörskålen 27 nu är fylld till bräddavloppet 28. kommer vatten att passera ut genom rännan 31 och sido- öppningen 29 till droppanordningen 9. från vilken det droppar ned i den öppna skålen 8 med en hastighet. som kan inställas genom vridning av locket 30. När vattenvikten i den öppna skålen 8 stigit till ett visst värde. bringar den vippanordningen att tippa tillbaka till utgångsläget och via armen lO pressa styrventílen 7 och huvudventilen l till stängan- de läge. Det i flottörskâlen 27 befintliga vattnet droppar ned i den öppna skålen. så att flottören 26 kommer att samverka med armen lO i att hålla ventilerna l och 7 i stängande läge, varefter det härovan beskriv- na förloppet åter startar.If a period of residence now sets in, the water in the open bowl 8 will evaporate and escape through the perforations 13. This reduces the pressure of the arm 10 against the shaft 25, while the amount of water enclosed in the air chamber 15 remains substantially unchanged. At a certain water level in the open bowl 8, the water pressure propagated through the passage 5 of the differential piston L and the channel 6 to the control valve 7 will press against the control valve 7. so that it opens slightly, and let water into the float bowl 27. The float 26 presses the shaft 25 upwards towards the arm 10. so that this causes the rocker device to tip over towards the air chamber side. Because the float bowl 27 is now filled to the overflow drain 28. water will pass out through the gutter 31 and the side opening 29 to the drip device 9. from which it drips into the open bowl 8 at a speed. which can be adjusted by turning the lid 30. When the water weight in the open bowl 8 has risen to a certain value. causes the rocker device to tip back to the initial position and via the arm 10 push the control valve 7 and the main valve 1 to the closed position. The water present in the float bowl 27 drips into the open bowl. so that the float 26 will cooperate with the arm 10 in keeping the valves 1 and 7 in the closed position, after which the process described above starts again.

Den i luftkammaren 15 befintliga luften ändrar givetvis sin tempee ratur i enlighet med omgivningen och därmed även sin volym. Detta leder till att en del av det i luftkammarens 15 bottenskål befintliga vattnet kommer att pressas ut i den öppna skålen 8 via den tvärställda slitsen 17 under dagen och sugas tillbaka under natten. Detta leder i sin tur lf till att vippanordningen under bevattningstider kommer att befinna sig i stängande läge under dagen. Bevattning sker alltså alltid nattetid, vilket just är vad som är bäst för växtligheten och avsikten med luft- kammaren 15.The air present in the air chamber 15 of course changes its temperature in accordance with the environment and thus also its volume. This leads to a part of the water present in the bottom bowl of the air chamber 15 will be forced out into the open bowl 8 via the transverse slot 17 during the day and sucked back during the night. This in turn leads to the tilting device being in the closed position during the day during irrigation times. Irrigation therefore always takes place at night, which is exactly what is best for the vegetation and the purpose of the air chamber 15.

Skulle slitsen 17 vara den enda förbindelsen mellan luftkammaren 15 och den öppna skålen 8. skulle det möta svårigheter att få in så myket 78110014-6 vatten i luftkammaren 15. som erfordras för att få klara och distinkta omslag från stängande (dagtid) till öppnande (nattetid) läge. Dessa svårigheter övervinnas medelst kanalen 18, som gör det möjligt att ta in så mycket vatten i luftkammaren 15, att dess yta, när vippanord- ningen tippas maximalt över mot luftkammarsidan, sammanfaller med kanalmynníngens topp. _ För att kunna ställa in vippanordningens maximala tippning mot luftkammarsidan. vilken bestämmer bevattningsperiodernas längd, är klotsen 23 så förskjutbar, att dess trappsteg 2A bilda tippningsvin- keln begränsande anslag.If the slot 17 were the only connection between the air chamber 15 and the open bowl 8. it would be difficult to get as much water into the air chamber 15 as is required to obtain clear and distinct covers from closing (daytime) to opening (daytime). night time) location. These difficulties are overcome by means of the duct 18, which makes it possible to take in so much water in the air chamber 15 that its surface, when the tilting device is tilted maximally over towards the air chamber side, coincides with the top of the duct mouth. _ To be able to set the maximum tilt of the tilting device towards the air chamber side. which determines the length of the irrigation periods, the block 23 is so displaceable that its steps 2A form the tipping angle limiting abutment.

Claims

7811004-6 Patent claim Device for automatic control of an irrigation device connected to a water main. comprising a main valve (1) with inlet (2), drain (3) and a valve body (4) designed as a differential piston with a clamp. central passage (5) to its large side, a channel (6) therefrom to a control valve (7) o which is arranged to, when closing and opening channel 1 (6), close and open the main valve (1), a tilting device with an open bowl (8), arranged to be supplied with water from a drip device (9) controlled by the control valve (7) and to, as soon as the supplied water quantity has reached a limit value, tip over and thereby with a projection (10) actuate the control valve (7). that it closes the main valve (1) and the water supply to the drip device (9), and keeps them closed. until so much water has evaporated from the bowl (8) that the tilting device tilts back. wherein the projection (10) releases the control valve (7), so that it reopens the main valve (1) and the water supply to the drip device (9). k ä n n e t e c k n a d thereof, that the tilting device. the control valve (7) and the main valve (1) are enclosed in a housing (II) with a perforated bottom (21). which housing (II) above the open bowl (8) is provided with a recess (12) with perforations (13). that the tilting device together with the bowl (8) has a space (14). forming a closed air chamber (15). which extends upwards over the upper edge of the open bowl (8) and has one in common with this bowl (8). flat bottom 7a11oou-6 (16) and is connected to the open bowl (8) by means of a narrow slot (17) accommodated at the bottom (10) over most of the width of the bowl (8). Device according to claim 1, characterized in that the air chamber (15) is also connected to the open bowl (8) via at least one channel (18), which extends from an opening in the air chamber (15) towards the open wall (19) facing the bowl (8) and to the opposite end of this bowl (8) and is provided with a narrow slot (20) running along its entire length next to the bottom of the bowl (8). Device according to claim 1 or

2. ' k ä n n e t e c k n a d thereof. that a step-shaped block (23) is arranged so as to be displaceable perpendicular to the distal end of the air chamber (15), that its steps (24) serve as deflection-limiting and selecting stops for the tilting device. I Q; Device according to claim 1, characterized in that the control valve (7) has a straight upwardly directed shaft (25), around which a float (26) is fastened and against which the upper end of the shaft (25) is the projection (10) arranged to abut and keep the control valve (7) closed. as long as the open bowl (8) is filled with water. 2; Device according to claim L, characterized in that the float (26) is surrounded by an upwardly open, circular and upwardly widening bowl (27) with a overflow drain (28) and a side opening (29) opposite the drip device (9), which bowl (27) is covered with a lid (30) with a central opening for the shaft (25) teh a downwardly directed sara (32) fitting in the bowl (27) with a small groove (31) opposite the side opening (29). which chute (31) is substantially as wide as the side opening (29). and that the float (26) is dimensioned that, when the bowl (27) is filled with water to the overflow drain (28). impart a considerable, upward force to the shaft (25).