SE417664B

SE417664B - Feeding device for a brushwood-controlling means in conjunction with a clearing saw

Info

Publication number: SE417664B
Application number: SE8003742A
Authority: SE
Inventors: T Marttinen; P Ruotsalainen
Original assignee: Enso Gutzeit Oy
Priority date: 1980-05-20
Filing date: 1980-05-20
Publication date: 1981-04-06

Abstract

A feeding device for a brushwood-controlling means in conjunction with a clearing saw, comprising a container for the brushwood-controlling means, a controlling means nozzle and a controlling channel which leads from the container to the nozzle and which includes a valve 1 which can be operated by hand and which comprises a piston 4, which is equipped with a return spring 11, and a cylinder 5 having openings for the inlet channel 6 and outer channel 7 for the controlling means, which channels are equipped with return valves 8, 18. An auxiliary piston 14, which is loaded with a spring 16 and which, when the piston 4 moves, opens or closes, respectively, a needle valve 9 which is located in connection with the opening of the outer channel, has been built into the piston. <IMAGE>

Description

' ' 2 uppvisar strypöppningar som leder från det av cylindern och kolven bildade vätskeutrymmet till utrymmet mellan kolvarna. Hjälpkolven kan sålunda i strypt tillstånd stanna efter att ha öppnat nàlventilen, och ur utrymmet mellan kolvarna kan vätskan fritt träda ut genom strypöppningarna. 2 has throttle openings leading from the liquid space formed by the cylinder and piston to the space between the pistons. The auxiliary piston can thus remain in the throttled state after opening the needle valve, and from the space between the pistons the liquid can escape freely through the throttling openings.

En annan utföringsform av uppfinningen kännetecknas av att hjälpkolven uppvisar en spindel genom vars förmedling nälventilen öppnas och stängs.Another embodiment of the invention is characterized in that the auxiliary piston has a spindle through whose mediation the needle valve is opened and closed.

Nàlventilens öppnande har således underlättats med spindeln.The opening of the needle valve has thus been facilitated with the spindle.

Uppfinningen skall beskrivas i det följande med hjälp av ett exempel med hänvisning till vidliggande ritning, vari Fig. 1 föreställer en röjningssåg vid vilken har fästs en uppfinningsenlig matningsanordning.The invention will be described in the following with the aid of an example with reference to the accompanying drawing, in which Fig. 1 represents a clearing saw to which a feeding device according to the invention has been attached.

Fig. 2 visar matningsanordningens ventil i genomskärning.Fig. 2 shows the valve of the feeding device in section.

Röjningssågens handmanövrerade ventil 1 har anbragts vid styrhandtagets 2 stöd, täckt med skyddet 3. Ventilen 1 omfattar kolven N och cylindern 5, vilken uppvisar öppningar fór bekämpningsmedlets inloppskanal 6 och utloppskanal 7. Kanalerna 6 och 7 är försedda med bakslagsventiler 8 resp. 18. Kolven kan förflyttas i riktningen som minskar cylinderns volym, med hjälp av manöverspaken 10 emot kraften av returfjädern 11. Bekämpningsmedlet trycks därmed genom utloppsröret och dysen ut på stubben. Manöverspaken 10 har förenats med vajer 12 med röjningssågens vridbara styrhandtag 13. Inuti kolven Ä har inbyggts en med fjäder 16 belastad hjälpkolv 1H, som vid rörelse av kolven öppnar resp. sluter nálventilen 9 som står i samband med utloppskanalens öppning. I hjälpkolven 14 finns strypöppningar 17, vilka leder' från det av cylindern 5 och kolven 14 bildade vätskeutryxmnet 20 till utrymxnat 21 mellan kolvnrna.The hand-operated valve 1 of the clearing saw has been fitted to the support of the guide handle 2, covered with the cover 3. The valve 1 comprises the piston N and the cylinder 5, which has openings for the pesticide inlet channel 6 and outlet channel 7. The channels 6 and 7 are provided with check valves 8 and 7, respectively. 18. The piston can be moved in the direction which reduces the volume of the cylinder, by means of the control lever 10 against the force of the return spring 11. The pesticide is thus pushed through the outlet pipe and the nozzle onto the stump. The control lever 10 has been connected to wires 12 with the rotating saw handle 13 of the clearing saw. Auxiliary piston 1H loaded with spring 16 has been built into the piston Ä, which when moving the piston opens resp. closes the needle valve 9 which is connected to the opening of the outlet channel. In the auxiliary piston 14 there are throttle openings 17, which lead from the liquid space 20 formed by the cylinder 5 and the piston 14 to the space 21 between the pistons.

Vätskemängden som sprutas ut med hjälp av kolvens H rörelse regleras i >enlighet med hur långt man vrider handtaget 13. Den inuti kolven H sittande, med spindel 15 utrustade hjälpkolven 1N öppnar omedelbart nâlventilen 8 när spindeln 15 träffar dess huvud. Spindeln 15 håller nàlventilen 9 öppen så länge tills kolven U áterförs till utgångsläget. Hjälpkolven 1H har omkring spindeln 15 fyra strypöppningar 17, genom vilka-vätskan har tillträde in bakom kolven 1U, varmed den ökar sprutvätskans mängd, dvs cylinderns 5 volym utnyttjas effektivast möjligt. Den med tryckfjäder utrustade bakslagsventilen 18 förhindrar under kolvens H återgång insugníns av vätskaThe amount of liquid ejected by the movement of the piston H is regulated according to how far the handle 13 is turned. The auxiliary piston 1N seated inside the piston H immediately opens the needle valve 8 when the spindle 15 hits its head. The spindle 15 keeps the needle valve 9 open until the piston U is returned to the initial position. The auxiliary piston 1H has around the spindle 15 four throttle openings 17, through which the liquid has access behind the piston 1U, whereby it increases the amount of the spray liquid, ie the volume of the cylinder 5 is used as efficiently as possible. The non-return valve 18 equipped with a compression spring prevents the suction of liquid during the return of the piston H

Claims

3 1 8003742-7 ur kana1en'7ti11baka tillcytinderutrymmet. The rubber cap 19 prevents the penetration of dust into the cylinder. The double piston system enables the use of a needle valve, so that the liquid that is sprayed does not come with too much force when it hits the blade of the clearing saw, which would result in splashing or sputtering of the pesticide. In addition, the needle valve prevents inadvertent outflow of the liquid from the container due to the capillary phenomenon. The abrasive pesticide feeder is easy to handle, and the pesticide can be easily dispensed at the desired location and at the right time. It will be apparent to one skilled in the art that the various embodiments of the invention may vary within the scope of the following claims. Patent claims

A grinding pesticide feeding device in connection with a clearing saw, comprising a container for the grinding pesticide, a pesticide nozzle and a pesticide channel leading from the container to the nozzle comprising a manually operable valve (1), comprising a piston (U) equipped with a return spring (11) and a cylinder (5) with openings for the pesticide inlet channel (6) and outlet channel (7), which are equipped with non-return valves (8, 18), characterized in that a auxiliary piston (1H) loaded with spring (16) is built into the piston as when moving the piston (H) opens resp. closes a needle valve (9) present in connection with the opening of the outlet channel.

Feed device according to Claim 1, characterized in that the auxiliary piston has throttle openings (17) which lead from the liquid space (20) formed by the cylinder (5) and the piston (U) to the space (21) between the pistons (H, 1U).

Feeding device according to Claim 1, characterized in that the auxiliary piston has a spindle (15) by means of which the needle valve (9) is opened and closed.