SE512329C2

SE512329C2 - Water jet pump with cleaning device

Info

Publication number: SE512329C2
Application number: SE9403968A
Authority: SE
Inventors: Sven Haakanson
Original assignee: Sven Haakanson
Priority date: 1994-11-17
Filing date: 1994-11-17
Publication date: 2000-02-28
Also published as: SE9403968D0; KR960017476A; SE9403968L; TW270896B; JPH08157060A

Abstract

PURPOSE: To prevent the plugging of the nozzle of a water jet pump transporting a granular material via a pressure liquid or easily remove the plugging when it occurs. CONSTITUTION: The driving water flowing into a casing 16 via a driving water inflow pipe is spouted from a horizontal nozzle 7 to transport a granular material. A cleaning rod 18 insertable into the injection port of the nozzle 7 is arranged on the back side of the nozzle 7, and means 20, 21 moving the cleaning rod 18 back and forth are provided on the rear end side of the cleaning rod 18 in this water jet pump 15.

Description

|'1l'¿| i* 512 329 ~ 2 Sandflödets storlek styrs genom att reglera vattenflödet till munstycket. | '1l'¿ | i * 512 329 ~ 2 The size of the sand flow is controlled by regulating the water flow to the nozzle.

Om vattenstrålen hastigt stängs av så kommer sanden i pumprörets övre del och det vatten som finns i röret ovanför ﬁltrets vattennivå att hastigt falla nedåt i röret och orsakar en tryckökrring i ﬁltrets nedersta del som kan trycka sand in i munstycket och sätta igen detta så att det inte blir möjligt att återstarta sandflödet utan rengöring av munstycket.If the water jet is quickly turned off, the sand in the upper part of the pump pipe and the water in the pipe above the water level of the filter will quickly fall down into the pipe and cause a pressure ring in the lower part of the filter which can push sand into the nozzle and clog it so that it will not be possible to restart the sand flow without cleaning the nozzle.

Igensättning av munstycket kan förhindras om vattenﬂödet minskas så långsamt att sanden hinner sjunka ned i rörets nedre del och lägga sig medan vatten fortfarande strömmar ut ur rnunstycket efter det att sandrörelsen upphört. Vattenströmningen hindrar sand att tränga in i munstycket.Clogging of the nozzle can be prevented if the water flow is reduced so slowly that the sand has time to sink into the lower part of the pipe and settle while water is still flowing out of the nozzle after the sand movement has stopped. The water flow prevents sand from penetrating the nozzle.

Vid strömavbrott, pumphaveri eller felmanöver kan vattenflödet hastigt avstängas, det behövs därför en anordning som kan rengöra munstycket och/eller hindra igensättning.In the event of a power failure, pump failure or incorrect operation, the water flow can be switched off quickly, therefore a device is needed that can clean the nozzle and / or prevent clogging.

Anordningeni ﬁgur 2 består av hus 14, munstycke 15 , inloppsrör 16, rörlig rensnål 17, tätningsring 18, handtag 19 och spärrhake 20. lnloppröret 16 är anslutet till vattenstrålpumpens trycksida. När sandtransporten är avstängd så skall rensnâlen vara inskjuten och låst med spärrhaken.The device in Fig. 2 consists of housing 14, nozzle 15, inlet pipe 16, movable cleaning needle 17, sealing ring 18, handle 19 and catch hook 20. The inlet pipe 16 is connected to the pressure side of the water jet pump. When the sand transport is switched off, the cleaning pin must be inserted and locked with the catch.

När sandﬂödet skall startas så startas först vattenpumpen så att trycket i inloppsröret blir högre än i filtret, därefter drages rensnålen ut ur munstycket och sandﬂödet startar.When the sand gap is to be started, the water pump is first started so that the pressure in the inlet pipe is higher than in the filter, then the cleaning needle is pulled out of the nozzle and the sand gap starts.

Sandflödet stoppas genom att först skjuta in rensnålen och låsa den med spärrhaken och sedan stoppa vattenpumpen.The sand flow is stopped by first pushing in the cleaning needle and locking it with the catch and then stopping the water pump.

Om vattenpumpen oavsiktligt har stoppat och det därmed finns risk att munstycket är igen- satt så skall rensnålen skjutas in innan vattenpumpen startas. Sand som kan ha trängt in i munstycket trycks då ut. Vattenpumpen startas, rensnålen dras ut och sandﬂödet startar.If the water pump has stopped unintentionally and there is a risk that the nozzle is clogged, the cleaning needle must be pushed in before the water pump is started. Sand that may have penetrated the nozzle is then pushed out. The water pump is started, the cleaning needle is pulled out and the sand fate starts.

Anordningen i figur 3 är försedd med en kolv 21 och en fjäder 22 i stället för handtaget i ñgur 2. När vattenpumpen är avstängd så trycks rensnålen in i muristycket av kolven och fjädern.The device in figure 3 is provided with a piston 21 and a spring 22 instead of the handle in ñgur 2. When the water pump is switched off, the cleaning needle is pushed into the wall piece of the piston and the spring.

När vattenpumpen startas så kommer vattentrycket i huset att påverka kolven så att fjädern trycks ihop och rensnálen drages ut ur munsrycket och lämnar fritt för en vattenstrâle.When the water pump is started, the water pressure in the housing will affect the piston so that the spring is compressed and the cleaning needle is pulled out of the mouth pressure and leaves free of a jet of water.

Om vattentrycket sjunker under ett värde som bestäms av kolvarean och fjäderspänningen så kommer fjädern, med hjälp av kolven, att trycka in rertsnålen i muttstycket och därmed förhindras igensättrring. När vattentrycket åter blir tillräckligt högt så trjfcker kolven ihop fjädern och drar dämied ut rensnålen ur rnunstycket och en vattenstråle bildas igen. s* 512 529 3 Munstycket är alltid stängt av rensnålen när trycket i huset inte är avsevärt högre än trycket i ñltret. Därmed förhindras igensättning av munstycket.If the water pressure drops below a value determined by the piston area and the spring tension, the spring will, with the aid of the piston, push the rert needle into the nut piece and thus prevent clogging. When the water pressure becomes high enough again, the piston pulls the spring together and thus pulls the cleaning needle out of the pipe piece and a water jet is formed again. s * 512 529 3 The nozzle is always closed by the cleaning needle when the pressure in the housing is not significantly higher than the pressure in the filter. This prevents clogging of the nozzle.

Röret 23 kan anslutas till ñltertanken, då avlastas fjädern från trycket i tanken och kan då göras mjukare. Om röret 23 anslutes till vattenpumpen 11, ﬁg 1, genom en ventil som leder vattentrycket alternativt till inloppsröret 16 eller röret 23 så kan den rörligt lagrade nålen flyttas med hjälp av detta tryck.The pipe 23 can be connected to the lower tank, then the spring is relieved from the pressure in the tank and can then be made softer. If the pipe 23 is connected to the water pump 11, ﬁ g 1, through a valve which conducts the water pressure alternatively to the inlet pipe 16 or the pipe 23, the movably stored needle can be moved by means of this pressure.

I ﬁgur 4 har kolven ersatts med ett membran 24, någon kolvtätning behövs då inte.In Figure 4, the piston has been replaced with a diaphragm 24, then no piston seal is needed.

Ett membran har begränsad slaglängd, därför har munstycket en något annorlunda utformning.A diaphragm has a limited stroke, therefore the nozzle has a slightly different design.

Funktionen är helt lika anordningen i figur 3.The function is exactly the same as the device in figure 3.

De ovan beskrivna anordningama kan användas i vattenstrålpumpar som transporterar andra korniga material än sand, till exempel keramik, glas, plast, aktivt kol.The devices described above can be used in water jet pumps that transport granular materials other than sand, for example ceramics, glass, plastic, activated carbon.

De kan också användas i andra anläggningar än filter, där det föreligger ett behov av att transportera kornigt material.They can also be used in plants other than filters, where there is a need to transport granular material.

Claims

10 15 20 25 30 35 (f 512 329 5 "" 4 1 PATENT REQUIREMENTS

1. Device for preventing and removing - clogging of a nozzle (15) in a liquid jet pump known as - (17), (15) removal and / or prevention of clogging. for pumping granular material, of a needle movably stored in a nozzle housing (14) which in the event of an interruption of operation can be inserted into the nozzle for

Device according to claim 1, in which the movably mounted needle (17) is manually operable.

Device according to one of the preceding claims, in which the movably mounted needle (17) is movable by means of spring force, electricity, hydraulics, pneumatics or a combination of some of these.

A method of operating the device according to any one of claims 1-3, wherein the movably mounted needle (17) is connected to an operating member (21; 24), characterized (17) being moved by means of a pressure difference on the operating member (21). ; 24) by the needle both sides.

A method according to claim 4, in which the movably mounted needle (17) is moved by switching the pressure from a water pump (11) between an inlet pipe (16) of the housing (14) and a pipe (23) connected to the actuator - back of verorganets (2l; 24). (3), a sand pump pipe connected to the lower part (3)

Sand filter comprising a sand bed of a sand bed for transporting a mixture of sand and water up to a container (7), and a nozzle (6, as with the sand pump tube (5) (8), which is located above a sand wash 15), inlet forming a water jet pump and which, via a (16) characterized (II), is connected by a device for preventing a pipeline to a water pump and removed by clogging of the nozzle (15), the device comprising said nozzle (15), a nozzle 10 l5 'lvfwkf F? 512 329 5 piece housing (14), and a needle (17) movably mounted in the housing (14), which in the event of an interruption of operation can be slid into the nozzle (15) for removal and / or prevention of clogging of the nozzle (15).

Sand filter according to claim 6, (15) is always closed when the pressure in is not considerably higher than the pressure in the sand filter characterized by the nozzle housing (14) (3).

Method for preventing and removing (15) characterized (17) clogging of the nozzle at the sand filter according to the starting (15), (17) when the pressure in the inlet pipe any of claims 6-7, the measures that the needle is pushed into the nozzle is then started, and that the needle (15) is greater than the pressure in the sand filter (3). that the pump (II) is pulled out of the nozzle (16)