DK169165B1

DK169165B1 - Nozzle head for use in hydraulic cleaning of pipelines, especially underground sewers

Info

Publication number: DK169165B1
Application number: DK20492A
Authority: DK
Inventors: Bjarne Toftdahl Kvejborg
Original assignee: Bjarne Toftdahl Kvejborg
Priority date: 1992-02-18
Filing date: 1992-02-18
Publication date: 1994-09-05
Also published as: DK20492D0; DK20492A

Description

DK 169165 B1DK 169165 B1

Opfindelsen angår et dysehoved til brug ved hydraulisk rensning af rørledninger, især undeijordiske afløbskanaler, hvor en bøjelig slange beregnet til tilførsel af spulevand under tryk (eller anden form for trykmedie) indføres i kanalen med dysehovedet anbragt i 5 slangens forreste ende for fremføring af denne under virkning af reaktionskraften fra et antal bagudrettede stråledyser udformet i dysehovedet, dvs under udnyttelse af spulevandets trykenergi, og hvor trykmediet samtidig udnyttes til at sætte dysehovedet i vibrerende eller oscillerende bevægelse.The invention relates to a nozzle head for use in hydraulic cleaning of pipelines, in particular underwater drainage channels, where a flexible hose intended for supply of pressurized flushing water (or some other type of pressure medium) is introduced into the channel with the nozzle head disposed at the front end of the hose for feeding it below. effect of the reaction force from a number of rearwardly directed jet nozzles formed in the nozzle head, i.e., utilizing the pressure energy of the flushing water, and wherein the pressure medium is simultaneously utilized to set the nozzle head in vibrating or oscillating motion.

10 Det er kendt at foretage indvendig rensning af rørledninger, især nedgravede afløbskanaler, drænledninger etc, ved indføring af en bøjelig slange, som i den forreste ende er forsynet med et dysehoved af den omhandlede art, dvs et dysehoved, som ved egen kraft er i stand til at bevæge sig fremad i rørledningen under virkning af reaktionskraften fra de bagudrettede stråledyser. Foruden de bagudrettede stråledyser kan 15 dysehovedet være forsynet med en eller flere fremadrettede stråledyser, hvis formål det er at spule kanalen fri foran dysehovedet, således at dette kan passere.10 It is known to carry out internal cleaning of pipelines, especially buried drainage channels, drainage pipes, etc., by introducing a flexible hose provided at the front end with a nozzle head of the kind in question, ie a nozzle head which is in its own power. capable of moving forward in the pipeline under the action of the reaction force of the rearward jet nozzles. In addition to the rearward jet nozzles, the nozzle head may be provided with one or more forward jet nozzles, the purpose of which is to flush the duct freely in front of the nozzle head so that this can pass.

Det har i praksis vist sig, at spulesystemets evne til at gennemtrænge og rense afløbskanaler i visse tilfælde er utilstrækkelig. Hvis eksempelvis afløbskanalen er kraftigt 20 tilstoppet med mudder, slam eller okkeraflejringer vil spuleeffekten i sig selv ofte være utilstrækkelig til at løsne og bortskylle de uønskede bestanddele. Årsagen er til dels, at hovedparten af spulevandet ledes bagud for frembringelse af den for fremdriften nødvendige reaktionskraft, medens kun en mindre del af spulevandet rettes direkte fremad mod tilstopningerne. I forsøg på at afhjælpe denne mangel er der udviklet dysehoveder, 25 hvor trykenergien i spulevandet foruden til fremdriften også udnyttes til at sætte dysehovedet i vibrerende bevægelse, for derigennem at øge rensevirkningen ved en mekanisk "hammereffekt".In practice, it has been found that in some cases the flushing system's ability to penetrate and purify drainage channels is inadequate. For example, if the drainage channel is heavily clogged with mud, sludge or ocher deposits, the flushing effect itself will often be insufficient to loosen and flush the unwanted components. In part, the reason is that most of the flushing water is directed backwards to produce the reaction force needed for the propulsion, while only a small part of the flushing water is directed directly towards the blockages. In an attempt to remedy this defect nozzle heads have been developed, in which the pressure energy in the flushing water, in addition to the propulsion, is also utilized to set the nozzle head in vibrating motion, thereby increasing the cleaning effect by a mechanical "hammer effect".

Et eksempel på et sådant vibrerende dysehoved kendes fra PTC-ansøgning nr 30 WO 89/12512. Dette kendte dysehoved er af den omhandlede type, der bevæger sig fremad i rørledningen under virkning af reaktionskraften fra et antal bagudrettede dyser, hvorigennem spulevandet presses ud. Dysehovedet er endvidere specielt ved, at det indvendigt er forsynet med et indlejret, frit roterbart legeme, som befinder sig i et cylindrisk kammer. Formålet med dette frit roterbare legeme er at frembringe en 35 vibrerende effekt, når legemet bringes i rotation af det passerende spulevand.An example of such a vibrating nozzle head is known from PTC Application No. 30 WO 89/12512. This known nozzle head is of the type in question moving forward in the pipeline under the action of the reaction force from a number of rearwardly directed nozzles through which the flushing water is extruded. Furthermore, the nozzle head is special in that it is provided internally with an embedded, freely rotatable body which is in a cylindrical chamber. The purpose of this freely rotatable body is to produce a vibrating effect when the body is rotated by the passing flushing water.

Det roterbare legeme er udformet som et turbinehjul, og er beregnet til at rotere med stor hastighed under virkning af vandgennemstrømningen i dysen. Under rotationen vil turbinehjulet vekselvis åbne og blokere for et antal sideporte i dysehovedet, således at der 40 fremkommer et vekslende flow ud gennem disse sideporte, og dermed en sidevis vekslende reaktionskraft. Det er denne vekslende reaktionskraft, som skaber den tilsigtede "ubalance" eller vibration i dysehovedet, som igen udnyttes til at give dysen den omtalte forbedrede renseeffekt og gennemtrængningsevne i tilstoppede rør.The rotatable body is designed as a turbine wheel, and is intended to rotate at high speed under the action of water flow in the nozzle. During rotation, the turbine wheel will alternately open and block a plurality of side ports in the nozzle head, so that an alternating flow emerges through these side ports, and thus a laterally alternating reaction force. It is this alternating reaction force which creates the intended "imbalance" or vibration in the nozzle head, which in turn is utilized to give the nozzle the aforementioned improved cleaning power and permeability in clogged pipes.

45 2 DK 169165 B145 2 DK 169165 B1

Princippet med sideportene, der skal åbne og lukke for at skabe en vekslende sidereaktionskraft, stiller relativt store krav til dysens mekaniske udformning, idet det roterende turbinelegeme dels skal kunne rotere frit, dels være i stand til at fungere som ventillegeme, dvs lukke og åbne for portene. Dysen bliver alt andet lige mere omstændelig 5 og dermed dyrere at fremstille, ligesom man må forvente et vist slid, som kræver udskiftning af turbinelegemet efter en vis driftstid, hvis "ventil"-virkningen skal opretholdes. Turbinelegemet er endvidere sårbar overfor urenheder i spulevandet.The principle of the side ports, which must open and close to create an alternating side reaction force, places relatively high demands on the mechanical design of the nozzle, in that the rotating turbine body must be able to rotate freely and partly be able to act as a valve body, ie close and open to ports. All else, the nozzle becomes even more cumbersome and thus more expensive to manufacture, just as one would expect some wear, which requires replacement of the turbine body after a certain operating time, if the "valve" effect is to be maintained. Furthermore, the turbine body is vulnerable to impurities in the flushing water.

En anden ulempe ved den kendte dyse består i, at den vekslende reaktionskraft, som 10 fremkalder dysens vibration, frembringes af væskestråler, der er rettet ud til siderne. Dvs at den del af trykvæsken, som medgår til frembringelse af vibrationen / oscillationen på denne måde ikke kommer dysens fremdrift til gode. Resultatet er, at der alt andet lige skal tilføres mere trykvæske til dysen for opnåelse af samme fremdrift og renseeffekt, sammenlignet med en dyse uden turbinelegeme og sidedyser.Another disadvantage of the known nozzle is that the alternating reaction force which causes the vibration of the nozzle is produced by liquid jets directed to the sides. That is, the part of the pressure fluid used to produce the vibration / oscillation in this way does not benefit the nozzle propulsion. The result is that everything else must be added more pressure fluid to the nozzle to achieve the same propulsion and cleaning effect, compared to a nozzle without turbine body and side nozzles.

1515

Formålet med den foreliggende opfindelse er at anvise et forbedret dysehoved af den omhandlede art, som ikke er behæftet med de mangler og ulemper, der er nævnt ovenfor.The object of the present invention is to provide an improved nozzle head of the kind in question which is not beset with the shortcomings and disadvantages mentioned above.

Dette er ifølge opfindelsen opnået ved, at der indvendig i dysehovedet er indlagt en frit bevægelig kugle, som befinder sig indesluttet i et fortrinsvis ringformet eller cylindrisk 20 kammer, der gennemstrømmes af spulevæsken under dennes passage gennem dysehovedet på vej frem mod de bagudrettede dyseåbninger, og at væsken herunder ledes gennem kammeret via et system af interne dyser eller ledekanaler, som er rettet til dels tangentielt i forhold til det ringformede kammer for bibringelse af en rotation af væsken i kammeret og dermed også af kuglen.This is achieved by the invention by inserting inside the nozzle head a freely movable ball which is enclosed in a preferably annular or cylindrical chamber which flows through the flushing liquid during its passage through the nozzle head on the way towards the rearward nozzle openings, and that the liquid is subsequently passed through the chamber via a system of internal nozzles or guide channels, which is directed, in part, tangentially to the annular chamber for imparting a rotation of the liquid in the chamber and thus also of the ball.

2525

Den roterende væskestrøm i det ringformede kammer driver kuglen med mndt i en hurtigt roterende bevægelse bestemt af kammerets geometriske form og væskestrømmens hastighed. Under rotationen skabes en ekscentrisk ubalance, idet kuglen består af et materiale med (væsentlig) større massefylde end vandet. Ubalancen resulterer i den 30 tilstræbte vibrerende effekt i dysehovedet.The rotating fluid flow in the annular chamber drives the sphere by mouth in a fast rotating motion determined by the geometric shape of the chamber and the velocity of the fluid flow. During the rotation, an eccentric imbalance is created, the sphere consisting of a material with (substantially) greater density than the water. The imbalance results in the 30 desired vibrating effect in the nozzle head.

Modsat det omtalte kendte princip udnyttes trykmediet langt mere effektivt ved dyseprincippet ifølge opfindelsen, hvor væsken først tjener til at bringe kuglen i rotation og dernæst til -ved reaktionsvirkning- at bidrage til dysens fremdrift, alternativt til 35 spuling af området foran dysen. Med andre ord er dysen ifølge opfindelsen alt andet lige mere effektiv og mere økonomisk end den omtalte kendte dyse.Contrary to the known principle, the pressure medium is utilized far more effectively by the nozzle principle of the invention, where the liquid first serves to rotate the ball and then, by reaction action, to contribute to the propulsion of the nozzle, alternatively to flushing the area in front of the nozzle. In other words, the nozzle according to the invention is anything but more efficient and economical than the known nozzle mentioned.

Dysen ifølge opfindelsen udmærker sig endvidere ved at være extrem enkel, og dermed billig at fremstille. Dysen er ikke følsom overfor mindre urenheder i spulevandet, ligesom 40 det mekaniske slid under brugen er begrænset. Følgelig kan der påregnes pålidelig drift og lang levetid. Dysen er specielt velegnet til "gør det selv" folk og håndværkere, men er naturligvis også tænkelig i en industriel udførelse, fx af rustfrit stål, beregnet til maskinstationsbrug og industriel brug. Til hjemmebrug og håndværksbrug forestiller opfinderen sig dysen fremstillet af sprøjtestøbt plast, hvorved fremstillingsomkostningerne 45 kan holdes på et yderst lavt niveau. Kuglen er en i forvejen massefabrikeret maskinkomponent, som kan erhverves til lav pris.Furthermore, the nozzle according to the invention is distinguished by being extremely simple and thus inexpensive to manufacture. The nozzle is not sensitive to minor impurities in the flushing water, just as the mechanical wear during use is limited. Consequently, reliable operation and long service life can be expected. The nozzle is especially suitable for "do-it-yourself" people and craftsmen, but is of course also conceivable in an industrial design, such as stainless steel, intended for machine station use and industrial use. For home and craft use, the inventor imagines the nozzle made of injection molded plastic, whereby manufacturing cost 45 can be kept at an extremely low level. The ball is an already mass-produced machine component that can be purchased at a low price.

DK 169165 B1 3DK 169165 B1 3

Fortrinsvis bevæger kuglen sig rundt i en cirkulær bane, der er vinkelret på dysehovedets langsgående centerakse. Derved bliver de af kuglen frembragte vibrationer rettet vinkelret på ffemføringsretningen, således at kanalen og de deri værende aflejringer/urenheder bearbejdes ved en sideværts hammereffekt. Alternativt kan kuglens bevægelsesbane 5 indrettes som angivet i krav 4, hvorved kuglen fremkalder kraftkomposanter også i forceringsretningen. Disse ekstra kraftkomposanter kan i visse tilfælde bidrage yderligere til dysehovedets renseeffekt og evne til at gennemtrænge især fastsiddende aflejringer, eksempelvis okkeraflejringer.Preferably, the ball moves in a circular path perpendicular to the longitudinal center axis of the nozzle head. Thereby, the vibrations produced by the ball are directed perpendicular to the direction of flow, so that the channel and the deposits / impurities present therein are processed by a lateral hammer effect. Alternatively, the ball path 5 of movement can be arranged as claimed in claim 4, whereby the ball produces force components also in the forcing direction. These additional force components can in some cases further contribute to the cleaning effect of the nozzle head and the ability to penetrate particularly stuck deposits, for example ocher deposits.

10 I krav 6 er angivet en foretrukken udførelsesform, hvor den vibrerende effekt øges ved at lade kuglen bevæge sig langs en kurve, der afviger i geometri fra den rent cirkulære form.In claim 6, a preferred embodiment is given in which the vibrating effect is increased by allowing the ball to move along a curve which differs in geometry from the purely circular shape.

Hvis kurven (løbefladen) eksempelvis har polygon-form vil kuglen tvinges til at bevæge sig tilsvarende, dvs at der sammenlignet med den cirkulære bane vil opstå yderligere reaktionskræfter mellem kuglen og dysehovedet, kræfter, som bidrager positivt til 15 dysehovedets ''hammereffekt".For example, if the curve (run surface) has a polygon shape, the ball will be forced to move accordingly, i.e., compared to the circular path, additional reaction forces will occur between the ball and the nozzle head, forces contributing positively to the "hammer effect" of the nozzle head.

Opfindelsen skal forklares nærmere i forbindelse med tegningen, hvor fig. 1 viser et dysehoved ifølge opfindelsen i snit på langs, 20 fig. 2 samme i tværsnit langs linien A-A i fig. 1, og fig. 3 et forstørret udsnit, der viser dysehovedets reaktionsdyser.The invention will be explained in more detail in connection with the drawing, in which fig. 1 is a longitudinal sectional view of a nozzle head according to the invention; FIG. 2 is the same in cross-section along the line A-A in FIG. 1, and FIG. 3 is an enlarged section showing the nozzle head reaction nozzles.

25 I den på tegningens fig. 1 og 2 viste udførelsesform består dysehovedet i hovedsagen af et forreste, konisk tilspidset hoved 1, en bagerste del 2, som dels danner en udvendig slangestuds 3, dels en intern ledeanordning 4 i hovedet, og en indvendig i hovedet 1 frit lejret kugle 5.25 In the FIG. 1 and 2, the nozzle head consists essentially of a front tapered tapered head 1, a rear portion 2 which forms an outer hose nozzle 3 and an internal guiding device 4 in the head, and an inside of the head 1 freely mounted ball 5.

3030

Hovedet 1 og den bagerste del 2 er samlet v hj af en snaplåsemekanisme 6 bestående af et indvendigt ringformet spor 7 i hovedet 1 og et antal komplementære gribetunger 8 forrest på delen 2. De to parter samles ved at presse gribetungeme ind i sporet 7. Modhager 9 på gribetungeme sikrer en fast forbindelse mellem de to parter 1 og 2. Eventuelt kan 35 samlingen yderligere sikres ved påføring af et egnet klæbemiddel mellem fladerne inden delenes sammenpresning.The head 1 and the rear portion 2 are assembled by a snap-locking mechanism 6 consisting of an inner annular groove 7 in the head 1 and a plurality of complementary gripping tongues 8 at the front of the portion 2. The two parts are joined by pressing the gripping tongues into the groove 7. Barbs 9 of the gripping tongs ensures a firm connection between the two parts 1 and 2. Optionally, the joint can be further secured by the application of a suitable adhesive between the surfaces prior to compression of the parts.

Mellem gribetungeme 8 findes et antal smalle, kanallignende udsparinger 10, som er rettet skråt bagud. Disse udsparinger udgør dysehovedets strålerør eller dyser. Forrest i hovedet 40 1 findes desuden en fremadrettet dyseåbning 11, som skaber en fremadrettet stråle beregnet til bortspuling af urenheder og forhindringer foran dysehovedet.Between the gripping tongues 8 are a number of narrow, channel-like recesses 10 which are directed obliquely rearward. These recesses form the nozzle head or nozzles of the nozzle. In the front of the head 40 1 is also provided a forward nozzle opening 11 which creates a forward beam intended for flushing of impurities and obstructions in front of the nozzle head.

Den bagerste del 2 danner som anført en bagudrettet slangestuds 3, der tjener til dysehovedets forbindelse med en ikke vist trykvandsslange. Trykvandet passerer via 45 slangestudsen ind gennem den centrale, interne ledeanordning 4 forrest på delen 2.The rear part 2, as stated, forms a rearward-facing hose nozzle 3 which serves to connect the nozzle head with a non-pressurized water hose. The pressure water passes through the 45 hose nozzle through the central internal guide device 4 at the front of the part 2.

Ledeanordningen er, som vist på tværsnittet i fig. 2, forsynet med et antal radiære, delvisAs shown in the cross-section of FIG. 2, provided with a number of radii, partially

Claims

20 PATENT REQUIREMENTS

1. Nozzle head for use in hydraulic cleaning of pipelines, in particular underground drainage channels, wherein a flexible hose intended for supply of pressurized flushing water (or some other type of pressure medium) is introduced into the channel with the nozzle head disposed at the forward end of the hose for feeding it under effect. of the reaction force of a plurality of rearward jet nozzles (10) formed in the nozzle head, and wherein the pressure medium is simultaneously utilized to set the nozzle head in vibrating or oscillatory motion, characterized in that a freely movable ball (5) is inserted inside the nozzle head enclosed in a preferably annular or cylindrical chamber (13) which flows through the flushing fluid during its passage through the nozzle head towards the said nozzle openings (10), and that the liquid is thereafter routed through the chamber via a system of internal nozzles or ducts (12). ), which is partly tangential to the annular chamber of the bib ringing a rotation of the liquid in the chamber and thus also of the ball. 35

Nozzle head according to claim 1, characterized in that the ball (5) consists of a material of good corrosion resistance and high density, for example stainless steel or lead bronze.

Nozzle head according to claim 1, characterized in that the annular chamber (13) is concentric with the longitudinal center axis (c) of the nozzle, that the chamber is formed with a preferably circular orbital (14) for the ball (5) which forms a part of the inside of the chamber and that the chamber is otherwise an integral part of the nozzle head. 45 DK 169165 B1 5

Nozzle head according to claims 1 and 3, characterized in that the center axis of the annular chamber (13) forms an inclined angle with said longitudinal center axis (c) in the nozzle head itself, so that the ball achieves a component of motion parallel to the longitudinal axis. axis (c) during rotation. 5

Nozzle head according to claim 3 or 4, characterized in that the liquid is introduced into the annular chamber (13) via a plurality of centrally located tangential jet nozzles or guide channels (12).

Nozzle head according to claims 1-5, characterized in that said track (14) for the ball (5) has a geometric deviation from the circular shape, for example elliptical, polygonic etc, for producing a pulsating or high frequency movement and / or reaction force during the rotation of the ball.