NO147201B

NO147201B - DEVICE FOR AUTOMATIC CONTROL OF A WATER CONNECTOR CONNECTED TO A WATER PIPE

Info

Publication number: NO147201B
Application number: NO793390A
Authority: NO
Inventors: Einar Skappel
Original assignee: Einar Skappel
Priority date: 1978-10-23
Filing date: 1979-10-22
Publication date: 1982-11-15
Also published as: JPS56501431A; AU5207879A; SE7811004L; NO147201C; FI61387C; FI61387B; SU1050542A3; AU544595B2; DK150691B; DE2964919D1; WO1980000777A1; IE48971B1; IE792022L; DK150691C; ATE2597T1; EP0020558B1; DK69280A; BE879589A; NO793390L; EP0020558A1

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

Det er fra svensk patent 353 210 kjent å forsyne en til en vannledning koblet vanningsanordning med en automatisk reguleringsanordning ved hjelp av hvilken vanningen kobles inn over perioder med innstillbar lengde avbrutt av vannfrie perioder med en lengde som er avhengig'av den omgivende lufts relative fuktighet• It is known from Swedish patent 353 210 to supply an irrigation device connected to a water line with an automatic regulation device by means of which the irrigation is switched on over periods of adjustable length interrupted by water-free periods with a length that depends on the relative humidity of the surrounding air•

Den kjente anordning omfatter en hovedventil med et som differensialstempel utformet ventillegeme med et lite, sentralt gjennomløp til stemplets store side, en kanal fra denne store side til en styreventil som er slik anordnet at når den stenger og åpner nevnte kanal vil den også stenge og åpne hovedventilen, en vippeanordning med en åpen skål anordnet for å få The known device comprises a main valve with a valve body designed as a differential piston with a small, central passage to the large side of the piston, a channel from this large side to a control valve which is arranged in such a way that when it closes and opens said channel it will also close and open the main valve, a tilting device with an open bowl arranged to get

vann fra en av styreventilen styrt dryppanordning og for så snart den tilførte vannmengde har nådd en grenseverdi, å tippe over og derved med et fremspring påvirke styreventilen slik at denne stenger hovedventilen og vanntilførselen til dryppanordningen og holder dem stengt til så meget vann er dunstet bort fra skålen at vippeanordningen tipper tilbake, hvorved fremspringet frigjør styreventilen slik at denne igjen åpner hovedventilen og vanntilførse-len til dryppanordningen. water from a drip device controlled by the control valve and for as soon as the added amount of water has reached a limit value, to tip over and thereby influence the control valve with a projection so that it closes the main valve and the water supply to the drip device and keeps them closed until as much water has evaporated away from the bowl that the tilting device tips back, whereby the projection releases the control valve so that this again opens the main valve and the water supply to the drip device.

Det har vist seg ønskelig å ordne slik at vanningen foregår hovedsakelig om natten og at de vannløse perioders lengde blir avhengig også av den fallende nedbør. It has proved desirable to arrange so that watering takes place mainly at night and that the length of the waterless periods also depends on the falling rainfall.

Foreliggende oppfinnelse angår en anordning som oppfyller nettopp disse ønsker. The present invention relates to a device which fulfills precisely these wishes.

Oppfinnelsen har fått den utformning og de karakteris-tiske trekk som vil fremgå av de etterfølgende patentkrav. The invention has been given the design and the characteristic features that will appear from the subsequent patent claims.

Oppfinnelsen vil bedre forstås ut fra følgende de-taljerte beskrivelse under henvisning til tegningene, hvor fig. 1 viser et lengdesnitt av en utførelse av en anordning ifølge oppfinnelsen i et vanningsanlegg, fig. 2 viser en detalj av~den på fig. 1 viste utførelse i stengende stilling, fig. 3 viser et snitt etter linjen III-III på fig. 1 og fig. 4 viser et snitt etter linjen IV-IV på fig. 2. The invention will be better understood from the following detailed description with reference to the drawings, where fig. 1 shows a longitudinal section of an embodiment of a device according to the invention in an irrigation system, fig. 2 shows a detail of the one in fig. 1 showed the embodiment in the closed position, fig. 3 shows a section along the line III-III in fig. 1 and fig. 4 shows a section along the line IV-IV in fig. 2.

En kapsling 11 omslutter anordningen og er sammensatt av to i hverandre, innskjøvne deler med en i det vesentlige plan bunn 21 med perforeringer 22 og et tak 3 3 med en regnvannsamlende forsenkning 12, hvis hovedsakelig plane bunn er forsynt med perforeringer 13. An enclosure 11 encloses the device and is composed of two parts pushed into each other with an essentially flat bottom 21 with perforations 22 and a roof 3 3 with a rainwater collecting recess 12, whose essentially flat bottom is provided with perforations 13.

Bunnen 21 bærer en hovedventil 1 med et innløp 1 som rager ut av kapslingen og er anordnet, for tilkobling til en vannledning og et avløp 3 som er anordnet for tilkobling til en vanningsanordning (ikke vist). Hovedventilen 1 omfatter et som differensialstempel utformet ventillegeme 4 med et lite sentralt gjennomløp 5 til stemplets store side, hvorfra en kanal 6 går i det vesentlige vertikalt til en styreventil 7 med et vertikalt skaft 25 som bærer en på dette festet flottør 26. Denne omslut-tes av en utad åpen, sirkulær skål 27 med et overløp 28 og en sideåpning 29. Skålens 27 vegg 34 utvider seg oppover. Et lokk 30 med en sentral åpning for skaftet 25 er forsynt med en i skålen The bottom 21 carries a main valve 1 with an inlet 1 which protrudes from the enclosure and is arranged for connection to a water line and a drain 3 which is arranged for connection 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 the large side of the piston, from which a channel 6 runs essentially vertically to a control valve 7 with a vertical shaft 25 which carries a float 26 attached to it. is made of an outwardly open, circular bowl 27 with an overflow 28 and a side opening 29. The wall 34 of the bowl 27 expands upwards. A lid 30 with a central opening for the shaft 25 is provided in the bowl

27 dreibart tilpasset, nedover rettet sarg 32 med en liten renne 27 rotatably adapted, downwardly directed rim 32 with a small chute

31 rett overfor skålens 27 sideåpning 29. Rennens 21 bredde svarer hovedsakelig til sideåpningen 29. Tilsammen danner de et gjennomløp til en som nese utformet dryppanordning 9, hvilket gjennomløpsareal kan reguleres ved at lokket 30 dreies i skålen 27. 31 directly opposite the side opening 29 of the bowl 27. The width of the gutter 21 mainly corresponds to the side opening 29. Together they form a passage to a drip device 9 designed as a nose, which passage area can be regulated by turning the lid 30 in the bowl 27.

I kapsl ingen foreligger en vippeanordning bestående In the case there is no existing tilting device

av to på hver side av en vippeaksel 35 anbragte skåler 8, 14 med felles plan bunn 16. Den ene 8 av disse skåler er åpen oppover og befinner seg under kapslingens takforsenkning 12 og under dryppeanordningen 9. Den annen skål 14 bærer et lukket luftkammer 15, • fra hvis tak et som en arm utformet fremspring 10 strekker seg inn over skaftet 25. Luftkammeret 15 er forbundet med den åpne skål 8 ved hjelp av en smal tverrgående sliss 17 langs den felles bunn 16 og ved hjelp av minst en til den åpne skåls 8 motsatte ende for-løpende kanal 18 med en smal, langsgående sliss 20 langs bunnen 16. Kanalens 18 tverrsnitt kan være utformet vilkårlig, det eneste viktige er at dens takhøyde stiger kontinuerlig fra å være ubetydelig større enn slissens 20 bredde ved den åpne skålens 8 borterste ende, til et maksimum ved dens munning i luftkammeret 15, hvorved munningshøyden bestemmes av den vannmengde man ønsker å ha i luftkammeret 15 og av dettes luftvolum. Munningshøyden må være noe større enn summen av slissenes 17, 20 bredde og den maksimale forskjell mellom vannets i luftkammeret 15 dag- og nattnivåer. of two bowls 8, 14 placed on either side of a rocker shaft 35 with a common flat bottom 16. One 8 of these bowls is open upwards and is located under the enclosure's roof recess 12 and under the drip device 9. The other bowl 14 carries a closed air chamber 15 , • from whose roof a projection 10 shaped like an arm extends over the shaft 25. The air chamber 15 is connected to the open bowl 8 by means of a narrow transverse slot 17 along the common bottom 16 and by means of at least one to the open bowl 8 opposite end running channel 18 with a narrow, longitudinal slit 20 along the bottom 16. The cross-section of the channel 18 can be designed arbitrarily, the only important thing is that its ceiling height rises continuously from being insignificantly greater than the width of the slot 20 at the open bowl 8 far end, to a maximum at its mouth in the air chamber 15, whereby the height of the mouth is determined by the amount of water one wishes to have in the air chamber 15 and by its air volume. The mouth height must be somewhat greater than the sum of the width of the slits 17, 20 and the maximum difference between the day and night levels of the water in the air chamber 15.

På kapslingens 11 bunn 21 er under luftkammerets ende anbragt en trappetrinnformet kloss 23 på en slik måte at den kan forskyves i retning mot vippeakselen 35. On the bottom 21 of the enclosure 11, a step-shaped block 23 is placed under the end of the air chamber in such a way that it can be moved in the direction of the rocker shaft 35.

Anordningen funksjonerer som følger: The device functions as follows:

Vi går ut fra den stilling hvor den åpne skål 8 er full av vann og har bragt vippeanordningen til å vippe i denne retning. Fremspringet (armen) 10 ligger an mot skaftet 25.slik at dette presser styreventilen 7 tettende mot dens sete. Derved vil trykket mot differensialstemplets 4 store side 36 bli lik vannledningstrykket og bringe hovedventilen 1 til å stenge til-førselen til vanningsanlegget. Flottørskålens 27 vann har fra dryppeanordningen 9 dryppet ned i den åpne skål 8 slik at flottør-skålen 27 er tom og flottørens 26 vekt samvirker med armen 10 i å holde styreventilen 7 i stengende stilling. We proceed from the position where the open bowl 8 is full of water and have caused the tilting device to tilt in this direction. The projection (arm) 10 rests against the shaft 25 so that this presses the control valve 7 tightly against its seat. Thereby, the pressure against the large side 36 of the differential piston 4 will become equal to the water line pressure and cause the main valve 1 to close 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 keeping the control valve 7 in the closed position.

Hvis det nå setter inn en oppholdsperiode kommer van-net i den åpne skål 8 til å fordampe og gå ut gjennom perforering-ene 13. Derved minsker armens 10 trykk mot skaftet 25, mens det i luftkammeret 15 innelukkede vann forblir i det vesentlige ufor-andret. Ved en viss vannstand i den åpne skål 8 vil det gjennom differensialstemplets 4 gjennomløp 5 og kanalen 6 til styreventil-ens 7 forplantede vanntrykk presse mot styreventilen 7, slik at denne åpner seg noe og slipper inn vann i flottørskålen 27. Flot-tøren 26 presser skaftet 25 oppover mot armen 10, slik at denne bringer vippeanordningen til å vippe over mot luftkammersiden. Ved at flottørskålen 27 nå er fylt til overløpet 28, vil vann passere ut gjennom rennen 31 og sideåpningen 29 til dryppanordningen 9, hvorfra det drypper ned i den åpne skål 8 med en hastighet som kan innstilles ved dreining av lokket 30. Når vannvekten i den åpne skål 8 har steget til en viss verdi, bringer den vippeanord ningen til å vippe tilbake til utgangsstillingen og over armen^10 presse styreventilen 7 og hovedventilen 1 til stengende stilling. Det i flottørskålen 27 foreliggende vann drypper ned i den åpne skål slik at flottøren 26. kommer til å samvirke med armen 10 i å holde ventilene . 1 og 7 i stengende stilling, hvoretter det ovenfor beskrevne forløp starter pånytt. If there is now a residence period, the water in the open bowl 8 will evaporate and exit through the perforations 13. Thereby, the pressure of the arm 10 against the shaft 25 decreases, while the water enclosed in the air chamber 15 remains essentially unchanged. the second. At a certain water level in the open bowl 8, the water pressure propagated through the passage 5 of the differential piston 4 and the channel 6 to the control valve's 7 will press against the control valve 7, so that it opens slightly and lets water into the float bowl 27. The float 26 presses the shaft 25 upwards towards the arm 10, so that this causes the tilting device to tilt over towards the air chamber side. As the float bowl 27 is now filled to the overflow 28, water will pass out through the chute 31 and the side opening 29 to the drip device 9, from where it drips into the open bowl 8 at a speed that can be set by turning the lid 30. When the water weight in the open bowl 8 has risen to a certain value, brings the tilting device to tilt back to the initial position and over the arm^10 push the control valve 7 and the main valve 1 to the closing 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 holding the valves. 1 and 7 in the closing position, after which the process described above starts again.

Den luft som foreligger i luftkammeret 15, forandrer selvsagt, sin temperatur i likhet med omgivelsene og dermed også . sitt volum.' Dette fører til at endel av det i luftkammerets 15 ... ■ .bunnskål':' .foreliggende vann vil bli presset ut i.den åpne skål 8 gjennom den tyerrgående sliss 17 om dagen og<*>bli suget tilbake om natten. Dette fører igjen til at vippeanordningen under vannings-tider vil befinne seg .i åpnende stilling, dvs. vippet mot luftkammersiden om natten og i stengende stilling om dagen. Vanning foregår altså alltid om natten, hvilket nettopp er hva som er best for vekstene og-hensikten med luftkammeret 15. The air present in the air chamber 15 naturally changes its temperature in the same way as the surroundings and thus also . its volume.' This leads to part of the water present in the air chamber 15 ... ■ .bottom bowl':' being pushed out into the open bowl 8 through the tyer-going slot 17 during the day and<*>be sucked back at night. This in turn causes the tilting device during watering times to be in the opening position, i.e. tilted towards the air chamber side at night and in the closing position during the day. Watering therefore always takes place at night, which is precisely what is best for the plants and the purpose of the air chamber 15.

Hvis slissen 17 skulle være den eneste forbindelse mellom luftkammeret 15 og den åpne skål 8, ville det oppstå vanskeligheter med å få inn så meget vann i luftkammeret 15 som er nødvendig for å få klare og distinkte omslag fra stengende (dag-tid) til åpnende (natt-tid) stilling. Disse vanskeligheter over-vinnes ved hjelp av kanalen 18 som gjør det mulig å ta inn så meget vann i luftkammeret 15 at dets overflate når vippeanordningen vippes maksimalt over mot luftkammersiden, faller sammen med kanalmunningens topp. If the slit 17 were to be the only connection between the air chamber 15 and the open bowl 8, difficulties would arise in getting as much water into the air chamber 15 as is necessary to obtain clear and distinct covers from closing (day-time) to opening (night-time) position. These difficulties are overcome by means of the channel 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 to the maximum towards the air chamber side, coincides with the top of the channel mouth.

For å kunne stille inn vippeanordningens maksimale vipping mot luftkammersiden, hvilket bestemmer vanningsperiodenes lengde, er klossen 23 slik forskyvbar at dens trappetrinn 24 danner begrensende anslag for vippevinkelen. In order to be able to set the tilting device's maximum tilting towards the air chamber side, which determines the length of the irrigation periods, the block 23 is so displaceable that its step 24 forms a limiting stop for the tilting angle.

Claims

1. Device for automatic regulation of an irrigation system connected to a water line, comprising a main valve (1) with inlet (2), outlet (3) and a valve body (4) designed as a differential piston with a small central passage (5) to its large -side, a channel (6) from there to a control valve (7) which is arranged for when it closes and opens the channel (6) to close and open the main valve (1), a tilting device with an open cup (8) which is arranged for the supply of water from a drip device (9) controlled by the control valve (7) and as soon as the supplied amount of water has reached a limit value to tip over and thereby influence the control valve (7) with a projection (10) so 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, whereby the protrusion (10) releases the control valve (7) so that this again opens the main valve (1) and the water supply to the drip device (9), characterized by the tilting device, the control valve (7) and the main valve (1) are enclosed in an enclosure (11) with a perforated bottom (21), which enclosure (11) above the open bowl (8) is provided with a recess (12) with perforations (13), that the tilting device has another space (14) which is provided with a closed air chamber (15) which extends upwards above the other space (14) and has a common flat bottom (16) with the open bowl (8) and is connected to the open bowl (8) with a narrow slot (17) down at the bottom (16) across the largest part of the width of the bowl (9).

2. 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 bottom of the air chamber (15) facing the open bowl (8) wall (19) and to the opposite end of this bowl (8) and is provided with a narrow slot (20) running along its entire length along the bottom of the bowl (8).

3. Device' according to claim 1 or 2, characterized in that a stepped block (23) is arranged to be able to be moved so perpendicularly to the air chamber^ 1 5 ) far end that its stepping (24) serves as a travel-limiting and selecting stop for the tilting device.

4. Device according to claim 2, characterized in that the control valve (7) has a pin (25) directed straight up, around which a float (26) is attached and against which pin's (25) upper end the projection (10) is arranged to rest and keep the control valve (7) closed so that the open bowl (8) is filled with water.

5. Device according to claim 5, characterized in that the float (26) is surrounded by an upwardly open circular and upwardly extended bowl (27) with an overflow (28) and a side opening (29) directly opposite the drip device (9), which bowl (27 ) is covered with a lid (30) with a central opening for the pin (25) and a in the bowl (27) adapted, downwardly directed rim (32) with a small channel (31) directly opposite the side opening (29), which channel ( 31) is essentially as wide as the side opening (29), and that the float (26) is dimensioned in such a way that when the bowl (27) is filled with water to the overflow (28), the pin (25) gives a significant upward Power.