CA2078430A1 - Portable high-pressure cleaner - Google Patents
Portable high-pressure cleanerInfo
- Publication number
- CA2078430A1 CA2078430A1 CA002078430A CA2078430A CA2078430A1 CA 2078430 A1 CA2078430 A1 CA 2078430A1 CA 002078430 A CA002078430 A CA 002078430A CA 2078430 A CA2078430 A CA 2078430A CA 2078430 A1 CA2078430 A1 CA 2078430A1
- Authority
- CA
- Canada
- Prior art keywords
- pump piston
- pressure
- pump
- intake
- valve
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
- B08B3/028—Spray guns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
- B05B9/0413—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material with reciprocating pumps, e.g. membrane pump, piston pump, bellow pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/01—Spray pistols, discharge devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
- B08B2203/0241—Combustion motor pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
- B08B2203/027—Pump details
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Secondary Cells (AREA)
Abstract
By a portable high-pressure cleaner (66) comprising a pump part (4) with a pumping chamber (24) and belonging valve and displacement means (14, 22, 26) between a low-pressure part (10, 32) where the pumped medium, by way of example water, is supplied, and a high-pressure part (12) with a discharge connection to a utility tool, by way of example a jet pipe, and an engine, preferably an internal combustion engine, the displacement means comprise a hollow, cylindrical pump piston (14) which preferably via a crosshead (16), connecting rods (18) and a crank (6) is drive connected directly with an engine piston (20), and which is permanently connected to the low-pressure part (10, 32) via intake openings (65) to the cavity of the pump piston, and an intake valve (22) positioned at an open front end of the pump piston, said intake valve being adapted to close the open front end of the pump piston (14) by forward movement of said pump piston towards a pressure valve (26) and the pumping chamber (24), and to open the front end of the pump piston (14) by rearward movement of said pump piston (14) towards the low-pressure part (10, 32).
Description
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A PORTABLE IIIG~ PRESSURE C:LEP~ER
The present invention relates to a portable high-pressure cleaner, in particular for hobby purposes, and of the type described in the introductory part of claim 1.
For leisure-time or hobby purposes is known to produce lightweight and compact high-pressure cleaners. However, it is often a question of downward~dimensioned and equipment-wise versions of high-pressure cleaners for professional 10 use, that is to say that known high-pressure cleaners for hobby parposes normally also are encumbered with the same disadvantages as high-pressure cleaners for professional use - including a relatively high price. Furthermore, known high-pressure cleaners of thi~ type are relatively heavy 15 units because they either include a conventional petrol en-gine or an electric motor. In the last-mentioned case in addition to connection to proper electricity supply a spe-cial security system is required because of the connection to a water supply.
, 20 ' From _the,,disclosure of US Patent No. 3 446 156 is known a diffential Pressure_~oppet valve comPrisinq an improved disch,arqP valve by a pumP havinqLa piston moveable in a normal back-and-forth cycle_capable of forcinq a fluid 25 throuah a,cYlindrical passaqew,a~.~The ~iston has a hollow interior chamber and includes an in_et ball v,alve,located at the fron~ end beinq cabable of movin~ between an open the inlet valve from the interior chamber and a closed Po-30 sition durinq the forwardstroke where the ball is_forced_ a~ai~e~ t '¦ The invention has for its purpose to provide an improvedhigh-pressure cleaner of the type mentioned initially, by 35 means of which a significant use-wise flexibility and in-.- -: : ' `'X~ 3 ~ $; ~
creased reliability are achieved - even at reduced manufac-turing costs.
The high-pressure cleaner according to the invention is di-5 stinctive in that the ~ump piston consists of a thin-walled tube of stainless steel_which via a crosshead, connectinq rods and a crank mechanism i5 directlv drive connected with an en~ine Piton of the_drive en~ine and which i:_B~m~=
nently connected to the low pressure ~art via intake ope-lO ninqs to the cavity o~ the pumP piston, that the intakevalve as per see kno~ is positioned at an o~n front_end-of the pumP piston, and that a valve member of the intake valve is connected to the PU~p piston in _uch loosely dis-placeable manner that the valve member by inertia stress is 15 removed from the oPen front end, when the ~ump piston is moved raPidl~ towards the low-pressure part, and displaced towards the open end when the PumP piston is moved rapidly in the o~posite direction. In this manner is obtained a strongly improved high-pressure cleaner which in conse~uen-20 ce of the simple and compact construction in particular issuited as a portable cleaning apparatus which despite the modest siz~ has a very significant cleaning capacity. And furthermore, by means of simple constructional provisions is obtained an intake valve build together with the hollow 25 pump piston which wikhout valve spring means may operate with a relatively high on/of~ frequPncy (50 - 160 opening/
closing movements per second).
In order to obtain a simplified and sturdy construction the 30 high~pressure cleaner according to the invention is such ,~ provided that the PumP ~iston oPpOSite the oPen front_end has a concentric connectinq part with small diameter, said connectin~ part beinq ~Eovided with a central, throu~h-qo-inq bore_~rovided wlth an internal thread, said threaded 35 bore serves the_pur~ose of fixina the vum~ Pi~ton to the ~ crosshead and fixinq a quidin pin t90L stretchinq_centra~
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: . : . . ': , . . ' : ' ' _y throu~h the pump piston, on which quidinq pin the valve memberfor th Q intake valve is lournaled.
Expediently the high-pressure cleaner according to the in-5 vention is such provided that said intake o~enings to the vavitY of the pump piston ,beinq ~rovided as a number of in-take channels in an inclined, c~lindrical reducinq piece to th,e c.;~nnectinq p_rt the axeses of sa.~-intake channels, stretchinqL rearwards in an acute an~le in relatlon to the lO centre-axis of the Pump ~iston. Hereby in a simple manner is achieved an extra easy supply of water from the low-pressure part into the hollow pump p,iston both during the forward pumping movement and during the rearward intake mo-vement of the pump piston.
In order to obtain a larger cleaning capacity and to uti-lize a sort of differential effect in the low-pressure part or on the intake-side of the pump piston the high-pressure cleaner according to the invention is such provided that a 20 rearmost Part of said hollow PumP Piston~ said inclined, _ cyl,indr,ical reducinq piece and the connectin~ Part for the .~ ~ump,piston are stretchinq throuqh the low-pressure part in the form of an intake chamber. By simple provisions the said differential effect is hereby obtain~d on the low-: 25 pressure side such that the supply of water into the hollow pump piston from the intake chamber is optimal during the pump stroke as well as during the in~ake stroke~
In the following the invention is described in more detail 30 with reference to the drawing, in which:-.
Fig. 1 is a view - partly in section - of an em~odiment of a high-pressure cleaner according to the invention - as ',seen from above, Fig. 2 a side view - partly in section - of the high-pres-sure cleaner shown in Fig. l, 4.
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Fig. 3 an enlarged sectional vi.ew of the pump part of the high-pressure cleaner shown in Fig. 1, Fig. 4 an enlarged sectional view of the pump part of the 5 high-pressure cleaner shown in Fig. 2, Fig. 5 a side view - partly in section - of a preferred em-bodiment o~ a high-pressure cleaner according to the inven-tion, Fig~ 6 a view - partly in section - of the high-pressure cleaner shown in Fig. S - as seen fro~ above,.
: Fig. 7 an end view - partly in section - as seen from the 15 section line VII VII in Fig. 5.
Fig. 8 a side view - mainly in section - o~ an embodiment of a pump part of the high-pressure cleaner according to the invention shown in Figs. 5 - 7, while, Fig. 9 is a sectional view o~ a pump piston ~or the pump part shown in Fig. 8 for a high-pressure cleaner according to the invention.
25 The high-pressure cleaner 2 shown in Figs. 1 and 2 com-prises a pump part 4 shown in Fig. 3 and in part in Fig. 4,.
. a crank mechanism 6 and a motor in the form of a petrol en-gine 8. The pump part 4 comprises a low~pressure side or part 10 and a high-press~re side or part 12 and a hollow, 30 tubular pump piston 14 placed in between, which via a , crosshead 16, connecting rods 18 and the crank mechanism 6 is drive connected directly with a drive piston 20 of the petrol engine ~. Furthermore, the pump part comprises an intake valve 22, a pumping chamber 24, a pressure valve 26 35 and a discharge stub 28 for the connection o~ a iet pipe.
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The pump piston 14 is opposite the intake valve 22 con-nected with a cylindrical connecting part 30 being con-nected with the crosshead 16 opposite the pump piston 14. A
rearmost par~ of the pump piston 14 and the connecting part 5 30 stretching on the low-pressure side lo through an intake chamber 32 to which water at waterworks pressure (2 - 8 har) is supplied through a ball valve 34 adapted to open by means of an activation rod 36, via a pivot arm 38 connected with a velocity regulator 40 (speeder~ for the petrol ~n-10 gine 8. When the latter by way of example is running atidle speed (corresponding to about 3.000 rpm) the hall valve 34 is closed such that no water is supplied to the pump part 4 which at least shortly - should stand to ope-- rate without water supply.
: The intake valve 22 comprises a valve member 42 which atthe open front end of the pump piston 14 is loosely, dis-: placeable journaled in a valve holder 44 securad to the ; pump piston 14, that is that the valve holder 44 is dis-20 placed forwards and backwards together with the pump piston 14. The valve member 42 is guided in the valve holder 44 by means of a stem portion 46 facing forward and which in a way together with the valve mamber 42 constitutes the pro-per displacement surface of the pump piston 14. When the 25 pump pis~on 14 including the valve holder 44 during opera-tion is displaced rapidly forwards and backwards the valve member 42 will among other things as a consequence o the inertia stress automatically be pressed towards the open : front end of the pump piston 14 when the latter during the 30 pumping stroke w is forwardly displaced, and be removed ., ~rom the open front end of the pump piston 14 when the lat-ter during the intake stroke - is rearwardly displace~. Du-l ring the pumping strvke the counterpressure in the pumping ¦ chamber of course will also actuate the intake valve 22 to 35 close by pressing the valve member 42 towards the open ~ront end o the pump piston 14. ~.
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The pump piston 14 operates in a pump cylinder 48, which at the low-pressure side 10 of the pump p~rt is closed by means of a stuffing box 50 through which the pump piston 14 also stretches. Opposite the stuffing box 50 the pumping 5 chamber 24 is provided in the form of a ring-shaped member which like the other parts of the pump part 4 is secured in a surrounding plastic mantle 52. The latter may consist of two parts or ~e provided by casting in o* the several parts of the pump part, as the plastic mantle 52 constitutes a 10 foremost handle for the high-pressure cleaner 2.
Opposite the pump piston 14 the pumping chamber 24 forms an enyagement surface for the pressure valve 26 as a valve member or valve disk 54 by means of a centr~ spindle 56 is 15 displaceably journaled in a valve housing 58 which com-prises a ring-shaped cavity 60 around a central guide bushing 62 ~or the cen~re spindle 56. The ring-shape~ cavi-ty 60 constitutes a holder for a compression spring 64 en-suring the pressing of the valve member 54 agai.nst the 20 front side edge of the pumping chamber 24.
The tubular pump piston 14 is at the rear end, that is to say at the junction to the connecting part 30 provided with radial intake channels 65 which from the intake chamber 32 25 see to the supply of water from the low-pr2ssure part 10 into the hollow pump piston 14. In front of the intake channels 65 the pump piston 14 has enlarged diameter com-`¦ pared to that of the connecting part 30, that is to say that the pump piston 14 and the connecting part 30 at the 30 lowpressure side 10 constitutes a sort of differential pi-ston reciprocating in the intake chamber 32 and which re-sults in supply o~ water from the intake chamber 32 into the hollow pump piston 14 during the forward pumping stroke as well a~ during the rearward intake stroke of the pump 35 piston 140 :,' .'.
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: ' ~ ' ~ ~ :` , ' - : - , :, - . : -: , , - : -,, ' ' By the preferred e~bodiment of the high-pressure cleaner 66 shown in Figs. 5 - 7 the same references have been used for the parts which are recovered by the high-pressure cleaner 2 cfr. Figs. 1 - 4. Furthermore, the high-pressure cleaner 5 66 comprises a petrol tank surrounding the pump part 4, a carburettor operated by means of the speeder 40 placed in a handle 72 which as indicated by arrows 74 in addition is used as sup~ly channel for cooling air to the motor, a flywheel 76 with belonging ignition-system 78.
: The pump part 4 of the high-pressuxe cleaner 66 is shown in more detail in Fig. 8 where among other things it may be seen that the pumping chamber 24 is provided in a rin~-shaped part 80, which in addition comprises an escape valve 15 mechanism 82 as the ring-shaped part 80 at the front end is held in place against a combined holder part and valve hou-sing part for the pressure valve 26 by means of a disc spring 84 such that the part 80 is allowed to ~e displaced in forward direction in case of a too high pressure behind 20 the pressure valve 26, by way of example if a connected jet :. pipe is blocked so that the excess-pressure may be drained , off via a lower radial opening 86.
By the high-pressure cleaner 66 the intake valve 22 is ar-25 ranged in a different way than that of the high-pressure cleaner 2 where the valve member 22 is displaceably jour-`
naled in a valve housing 44. Instead a valve member 88 at the open front end of the hollow pump pist~n 14 is displa-ceably journaled on a valve pin 90 stretching centrally 30 through the hollow pump piston 14 and secured to a ~upport bushing 92 being ecured inside a central bore 94 of the connecting part 30. The valve member 88 cooperates with a head part 96 of the valve pin 90 in such a way that the ~ valve member 88 is allowed to be rem~ved very little from i 35 the open front end of the pump piston 14 when the latter during the intake stroke is displaced rearwards etc. The ': ~
high-pressure cleaner 66 comprises like the high-pressure cleaner 2 a water supply 98 which is partly surrounded by a sound absorber 100.
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A PORTABLE IIIG~ PRESSURE C:LEP~ER
The present invention relates to a portable high-pressure cleaner, in particular for hobby purposes, and of the type described in the introductory part of claim 1.
For leisure-time or hobby purposes is known to produce lightweight and compact high-pressure cleaners. However, it is often a question of downward~dimensioned and equipment-wise versions of high-pressure cleaners for professional 10 use, that is to say that known high-pressure cleaners for hobby parposes normally also are encumbered with the same disadvantages as high-pressure cleaners for professional use - including a relatively high price. Furthermore, known high-pressure cleaners of thi~ type are relatively heavy 15 units because they either include a conventional petrol en-gine or an electric motor. In the last-mentioned case in addition to connection to proper electricity supply a spe-cial security system is required because of the connection to a water supply.
, 20 ' From _the,,disclosure of US Patent No. 3 446 156 is known a diffential Pressure_~oppet valve comPrisinq an improved disch,arqP valve by a pumP havinqLa piston moveable in a normal back-and-forth cycle_capable of forcinq a fluid 25 throuah a,cYlindrical passaqew,a~.~The ~iston has a hollow interior chamber and includes an in_et ball v,alve,located at the fron~ end beinq cabable of movin~ between an open the inlet valve from the interior chamber and a closed Po-30 sition durinq the forwardstroke where the ball is_forced_ a~ai~e~ t '¦ The invention has for its purpose to provide an improvedhigh-pressure cleaner of the type mentioned initially, by 35 means of which a significant use-wise flexibility and in-.- -: : ' `'X~ 3 ~ $; ~
creased reliability are achieved - even at reduced manufac-turing costs.
The high-pressure cleaner according to the invention is di-5 stinctive in that the ~ump piston consists of a thin-walled tube of stainless steel_which via a crosshead, connectinq rods and a crank mechanism i5 directlv drive connected with an en~ine Piton of the_drive en~ine and which i:_B~m~=
nently connected to the low pressure ~art via intake ope-lO ninqs to the cavity o~ the pumP piston, that the intakevalve as per see kno~ is positioned at an o~n front_end-of the pumP piston, and that a valve member of the intake valve is connected to the PU~p piston in _uch loosely dis-placeable manner that the valve member by inertia stress is 15 removed from the oPen front end, when the ~ump piston is moved raPidl~ towards the low-pressure part, and displaced towards the open end when the PumP piston is moved rapidly in the o~posite direction. In this manner is obtained a strongly improved high-pressure cleaner which in conse~uen-20 ce of the simple and compact construction in particular issuited as a portable cleaning apparatus which despite the modest siz~ has a very significant cleaning capacity. And furthermore, by means of simple constructional provisions is obtained an intake valve build together with the hollow 25 pump piston which wikhout valve spring means may operate with a relatively high on/of~ frequPncy (50 - 160 opening/
closing movements per second).
In order to obtain a simplified and sturdy construction the 30 high~pressure cleaner according to the invention is such ,~ provided that the PumP ~iston oPpOSite the oPen front_end has a concentric connectinq part with small diameter, said connectin~ part beinq ~Eovided with a central, throu~h-qo-inq bore_~rovided wlth an internal thread, said threaded 35 bore serves the_pur~ose of fixina the vum~ Pi~ton to the ~ crosshead and fixinq a quidin pin t90L stretchinq_centra~
,' :
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3 ~ W~
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- : ' ' ' : ~ . . . - :
,, . . :: , : . - :
: ' : '. ' , . . '' ' ' ,', :
: . : . . ': , . . ' : ' ' _y throu~h the pump piston, on which quidinq pin the valve memberfor th Q intake valve is lournaled.
Expediently the high-pressure cleaner according to the in-5 vention is such provided that said intake o~enings to the vavitY of the pump piston ,beinq ~rovided as a number of in-take channels in an inclined, c~lindrical reducinq piece to th,e c.;~nnectinq p_rt the axeses of sa.~-intake channels, stretchinqL rearwards in an acute an~le in relatlon to the lO centre-axis of the Pump ~iston. Hereby in a simple manner is achieved an extra easy supply of water from the low-pressure part into the hollow pump p,iston both during the forward pumping movement and during the rearward intake mo-vement of the pump piston.
In order to obtain a larger cleaning capacity and to uti-lize a sort of differential effect in the low-pressure part or on the intake-side of the pump piston the high-pressure cleaner according to the invention is such provided that a 20 rearmost Part of said hollow PumP Piston~ said inclined, _ cyl,indr,ical reducinq piece and the connectin~ Part for the .~ ~ump,piston are stretchinq throuqh the low-pressure part in the form of an intake chamber. By simple provisions the said differential effect is hereby obtain~d on the low-: 25 pressure side such that the supply of water into the hollow pump piston from the intake chamber is optimal during the pump stroke as well as during the in~ake stroke~
In the following the invention is described in more detail 30 with reference to the drawing, in which:-.
Fig. 1 is a view - partly in section - of an em~odiment of a high-pressure cleaner according to the invention - as ',seen from above, Fig. 2 a side view - partly in section - of the high-pres-sure cleaner shown in Fig. l, 4.
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Fig. 3 an enlarged sectional vi.ew of the pump part of the high-pressure cleaner shown in Fig. 1, Fig. 4 an enlarged sectional view of the pump part of the 5 high-pressure cleaner shown in Fig. 2, Fig. 5 a side view - partly in section - of a preferred em-bodiment o~ a high-pressure cleaner according to the inven-tion, Fig~ 6 a view - partly in section - of the high-pressure cleaner shown in Fig. S - as seen fro~ above,.
: Fig. 7 an end view - partly in section - as seen from the 15 section line VII VII in Fig. 5.
Fig. 8 a side view - mainly in section - o~ an embodiment of a pump part of the high-pressure cleaner according to the invention shown in Figs. 5 - 7, while, Fig. 9 is a sectional view o~ a pump piston ~or the pump part shown in Fig. 8 for a high-pressure cleaner according to the invention.
25 The high-pressure cleaner 2 shown in Figs. 1 and 2 com-prises a pump part 4 shown in Fig. 3 and in part in Fig. 4,.
. a crank mechanism 6 and a motor in the form of a petrol en-gine 8. The pump part 4 comprises a low~pressure side or part 10 and a high-press~re side or part 12 and a hollow, 30 tubular pump piston 14 placed in between, which via a , crosshead 16, connecting rods 18 and the crank mechanism 6 is drive connected directly with a drive piston 20 of the petrol engine ~. Furthermore, the pump part comprises an intake valve 22, a pumping chamber 24, a pressure valve 26 35 and a discharge stub 28 for the connection o~ a iet pipe.
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The pump piston 14 is opposite the intake valve 22 con-nected with a cylindrical connecting part 30 being con-nected with the crosshead 16 opposite the pump piston 14. A
rearmost par~ of the pump piston 14 and the connecting part 5 30 stretching on the low-pressure side lo through an intake chamber 32 to which water at waterworks pressure (2 - 8 har) is supplied through a ball valve 34 adapted to open by means of an activation rod 36, via a pivot arm 38 connected with a velocity regulator 40 (speeder~ for the petrol ~n-10 gine 8. When the latter by way of example is running atidle speed (corresponding to about 3.000 rpm) the hall valve 34 is closed such that no water is supplied to the pump part 4 which at least shortly - should stand to ope-- rate without water supply.
: The intake valve 22 comprises a valve member 42 which atthe open front end of the pump piston 14 is loosely, dis-: placeable journaled in a valve holder 44 securad to the ; pump piston 14, that is that the valve holder 44 is dis-20 placed forwards and backwards together with the pump piston 14. The valve member 42 is guided in the valve holder 44 by means of a stem portion 46 facing forward and which in a way together with the valve mamber 42 constitutes the pro-per displacement surface of the pump piston 14. When the 25 pump pis~on 14 including the valve holder 44 during opera-tion is displaced rapidly forwards and backwards the valve member 42 will among other things as a consequence o the inertia stress automatically be pressed towards the open : front end of the pump piston 14 when the latter during the 30 pumping stroke w is forwardly displaced, and be removed ., ~rom the open front end of the pump piston 14 when the lat-ter during the intake stroke - is rearwardly displace~. Du-l ring the pumping strvke the counterpressure in the pumping ¦ chamber of course will also actuate the intake valve 22 to 35 close by pressing the valve member 42 towards the open ~ront end o the pump piston 14. ~.
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The pump piston 14 operates in a pump cylinder 48, which at the low-pressure side 10 of the pump p~rt is closed by means of a stuffing box 50 through which the pump piston 14 also stretches. Opposite the stuffing box 50 the pumping 5 chamber 24 is provided in the form of a ring-shaped member which like the other parts of the pump part 4 is secured in a surrounding plastic mantle 52. The latter may consist of two parts or ~e provided by casting in o* the several parts of the pump part, as the plastic mantle 52 constitutes a 10 foremost handle for the high-pressure cleaner 2.
Opposite the pump piston 14 the pumping chamber 24 forms an enyagement surface for the pressure valve 26 as a valve member or valve disk 54 by means of a centr~ spindle 56 is 15 displaceably journaled in a valve housing 58 which com-prises a ring-shaped cavity 60 around a central guide bushing 62 ~or the cen~re spindle 56. The ring-shape~ cavi-ty 60 constitutes a holder for a compression spring 64 en-suring the pressing of the valve member 54 agai.nst the 20 front side edge of the pumping chamber 24.
The tubular pump piston 14 is at the rear end, that is to say at the junction to the connecting part 30 provided with radial intake channels 65 which from the intake chamber 32 25 see to the supply of water from the low-pr2ssure part 10 into the hollow pump piston 14. In front of the intake channels 65 the pump piston 14 has enlarged diameter com-`¦ pared to that of the connecting part 30, that is to say that the pump piston 14 and the connecting part 30 at the 30 lowpressure side 10 constitutes a sort of differential pi-ston reciprocating in the intake chamber 32 and which re-sults in supply o~ water from the intake chamber 32 into the hollow pump piston 14 during the forward pumping stroke as well a~ during the rearward intake stroke of the pump 35 piston 140 :,' .'.
`
. ~ ~
: ' ~ ' ~ ~ :` , ' - : - , :, - . : -: , , - : -,, ' ' By the preferred e~bodiment of the high-pressure cleaner 66 shown in Figs. 5 - 7 the same references have been used for the parts which are recovered by the high-pressure cleaner 2 cfr. Figs. 1 - 4. Furthermore, the high-pressure cleaner 5 66 comprises a petrol tank surrounding the pump part 4, a carburettor operated by means of the speeder 40 placed in a handle 72 which as indicated by arrows 74 in addition is used as sup~ly channel for cooling air to the motor, a flywheel 76 with belonging ignition-system 78.
: The pump part 4 of the high-pressuxe cleaner 66 is shown in more detail in Fig. 8 where among other things it may be seen that the pumping chamber 24 is provided in a rin~-shaped part 80, which in addition comprises an escape valve 15 mechanism 82 as the ring-shaped part 80 at the front end is held in place against a combined holder part and valve hou-sing part for the pressure valve 26 by means of a disc spring 84 such that the part 80 is allowed to ~e displaced in forward direction in case of a too high pressure behind 20 the pressure valve 26, by way of example if a connected jet :. pipe is blocked so that the excess-pressure may be drained , off via a lower radial opening 86.
By the high-pressure cleaner 66 the intake valve 22 is ar-25 ranged in a different way than that of the high-pressure cleaner 2 where the valve member 22 is displaceably jour-`
naled in a valve housing 44. Instead a valve member 88 at the open front end of the hollow pump pist~n 14 is displa-ceably journaled on a valve pin 90 stretching centrally 30 through the hollow pump piston 14 and secured to a ~upport bushing 92 being ecured inside a central bore 94 of the connecting part 30. The valve member 88 cooperates with a head part 96 of the valve pin 90 in such a way that the ~ valve member 88 is allowed to be rem~ved very little from i 35 the open front end of the pump piston 14 when the latter during the intake stroke is displaced rearwards etc. The ': ~
high-pressure cleaner 66 comprises like the high-pressure cleaner 2 a water supply 98 which is partly surrounded by a sound absorber 100.
.j :
:
., :
:
: :
, ,. :
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.
.: -- , : - . . ., . . :
... . - , .,: ........ : , , ~ , ~ . ,
Claims (4)
1. A portable high-pressure (2, 66) cleaner comprising a pump part (4) with a pumping chamber (24), a pump piston (14), an intake valve (22) between a low-pressure part (109 where the jumped medium, such as water, is supplied, and a high-pressure part (12) with a discharge connection (28) to an auxiliary tool, such as a jet pipe, and a drive engine i the form of an internal combustion engine (8), c h a -r a c t e r i z e d in that the pump piston (14) consists of a thin-walled tube of stainless steel which via a cross-head (16), connecting rods (18) and a crank mechanism (6) is directly drive connected with an engine piston (20) of the drive engine (8) and which is permanently connected to the low-pressure part (10) via intake openings (65) to the cavity of the pump piston (14), that the intake valve (22) as per see know is positioned at an open front end of the pump piston (14), and that a valve member (42, 88) of the intake valve (22) is connected to the pump piston (14) in such loosely displaceable manner that the valve member (42, 88) by inertia stress is removed from the open front end, when the pump piston (14) is moved rapidly towards the low-pressure part (10), and displaced towards the open end when the pump piston (14) is moved rapidly in the opposite direction.
2. A portable high-pressure cleaner according to claims 1, c h a r a c t e r i z e d in that the pump piston (14) op-posite the open front end has a concentric connecting part (30) with small diameter, said connecting part (30) being provided with a central, through-going bore (94) provided with an internal thread, said threaded bore (94) serves the purpose of fixing the pump piston (14) to the crosshead (16) and fixing a guiding in (90) stretching centrally through the pump piston (14), on which guiding pin (90) the valve member (42, 88) for the intake valve is journaled.
3. A portable high-pressure cleaner according to claims 1 and 2, c h a r a c t e r i z e d in that said intake ope-nings to the vavity of the pump piston (14) being provided as a number of intake channels (65) in an inclined, cylin-drical reducing piece to the connecting part (30) the axe-ses of said intake channels (65) stretching rearwards in an acute angle in relation to the centre-axis of the pump pi-ston (14).
4. A portable high-pressure cleaner according to claims 1 -3, c h a r a c t e r i z e d in that rearmost part of said hollow pump piston (14), said inclined, cylindrical reducing piece and the connecting part (30) for the pump piston (14) are stretching through the low-pressure part (10) in the form of an intake chamber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK072490A DK166766B1 (en) | 1990-03-20 | 1990-03-20 | PORTABLE HIGH PRESSURE CLEANER |
| DK0724/90 | 1990-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2078430A1 true CA2078430A1 (en) | 1991-09-21 |
Family
ID=8096811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002078430A Abandoned CA2078430A1 (en) | 1990-03-20 | 1991-03-18 | Portable high-pressure cleaner |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0521054A1 (en) |
| JP (1) | JPH05507986A (en) |
| AU (1) | AU634376B2 (en) |
| CA (1) | CA2078430A1 (en) |
| DK (1) | DK166766B1 (en) |
| FI (1) | FI924170A (en) |
| WO (1) | WO1991014517A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK170523B1 (en) * | 1991-04-17 | 1995-10-16 | Skannerup Mona | Compressed air blower |
| DK20392A (en) * | 1992-02-17 | 1993-08-18 | K F Ind As | PORTABLE HIGH PRESSURE CLEANER |
| DE59500726D1 (en) * | 1994-02-05 | 1997-11-06 | Kaercher Gmbh & Co Alfred | High pressure cleaning device |
| US20170348712A1 (en) * | 2014-12-19 | 2017-12-07 | Daniele Marino | Device for emitting a liquid |
| CN106989428A (en) * | 2017-05-31 | 2017-07-28 | 珠海格力电器股份有限公司 | Wind energy recycling system for realizing self-cleaning of range hood and range hood |
| CN109731816B (en) * | 2019-02-19 | 2024-05-14 | 王建设 | Portable hydrodynamic cleaner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2612837A (en) * | 1946-05-21 | 1952-10-07 | American Eng Co Ltd | Pump |
| US3446156A (en) * | 1966-11-17 | 1969-05-27 | Cosmodyne Corp The | Differential pressure poppet valve |
| US4792096A (en) * | 1987-12-14 | 1988-12-20 | Gregory T Jack | Hose nozzle with high pressure pump |
-
1990
- 1990-03-20 DK DK072490A patent/DK166766B1/en not_active IP Right Cessation
-
1991
- 1991-03-18 EP EP91906469A patent/EP0521054A1/en not_active Withdrawn
- 1991-03-18 AU AU75403/91A patent/AU634376B2/en not_active Ceased
- 1991-03-18 CA CA002078430A patent/CA2078430A1/en not_active Abandoned
- 1991-03-18 JP JP91506282A patent/JPH05507986A/en active Pending
- 1991-03-18 WO PCT/DK1991/000080 patent/WO1991014517A1/en not_active Application Discontinuation
-
1992
- 1992-09-17 FI FI924170A patent/FI924170A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05507986A (en) | 1993-11-11 |
| EP0521054A1 (en) | 1993-01-07 |
| AU634376B2 (en) | 1993-02-18 |
| FI924170A0 (en) | 1992-09-17 |
| AU7540391A (en) | 1991-10-21 |
| FI924170A (en) | 1992-09-17 |
| DK166766B1 (en) | 1993-07-12 |
| DK72490D0 (en) | 1990-03-20 |
| WO1991014517A1 (en) | 1991-10-03 |
| DK72490A (en) | 1991-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |