Abstract: A method for carrying out wire bolting of a rock, in which method a hole is drilled in a rock, and a wire piece shorter than the hole is pushed into the hole. In order to simplify the insertion, the wire piece is pushed into the hole by the same wire from which the wire piece has been cut. A wire bolting device developed for effecting the method comprises a cutting device mounted on the carrier of the device between a wire feeding mechanism and a resilient guide pipe attached to a head guide. A mounting space is provided beside the cutting device for the mounting of a pushing support between the ends of the cut wire.

Abstract: The invention relates to a method and a device for guiding a concrete feeding hose in connection with the grout feedin rock bolting. The concrete feeding hose is therein passed by means of a feeder froma reel into a guide head supported on a feeding beam of a drilling equipment and further through the guide head into a hole drilled in the rock, and is passed back on to the reel in proportion as the hole is filled. In order to protect the feeder of the concrete feeding hose against dirt and mechanical damage, the concrete feeding hose is pushed into the guide head through a flexible guiding means.

Abstract: The invention relates to an apparatus and method for measuring the properties of fiber pulp. The apparatus used in the method comprises a batching vessel (1) for measuring the volume and temperature of the sample; a filtering chamber (3, 5) by means of which the sample is filtered on a wire (4) by means of a pressure difference, and an air flow is produced through the pulp cake formed during the filtration. The apparatus has, next to the filtering chamber (3, 5), a raisable vertical central shaft (8), which can be rotated in steps, and holders for transferring the wire (4) together with the pulp cake to positions around the central shaft (8) for the functions, and for returning the wire (4) into the filtering chamber.

Abstract: A device for storing a concrete feeding hose in a rock bolting device, comprising a reel for a hose, which reel is mounted rotatably on a supporter, and that end of the hose which is attached to the reel is connected to concrete feeding means. In order that the coiling device could be used for passing the hose into a drill hole and for drawing it out of the hole, the reel is surrounded by a ring-shaped supporting wall against which the hose is positioned when the reel is rotated in the uncoiling direction. An unrotative guiding means is provided beside the supporting wall so as to guide the hose out of the reel by the action of an axial expulsive force exerted on the hose due to the rotary movement of the reel.

Abstract: A thickener has a receptacle in which a thickening drum having an axial filtering wall is mounted in a receptacle for rotation about an axis. A liquid-and-solid-materials mass to be thickened is introduced into the one axial end of the thickening drum. Thereby the solid materials contained in the mass to be filtered form a filtering layer on the inner surface of the a filtering wall and liquid filtrate from the mass flows through the filtering layer and wall into the receptacle. At least one barrier plate radially divides the inner space of the thickening drum into axially sequential spaces, the barrier plate being fixed within the thickening drum for rotation therewith. The barrier plate is provided with at least one opening axially therethrough for flow of the mass to be thickened and at least one opening axially therethrough for air flow in the axial direction of the thickening drum. The thickened mass is then discharged from the other axial end of the thickening drum.

Abstract: A bearing arrangement for a feeding device for a drilling machine, comprising a feeding beam (1) provided with longitudinal guides (6), a carriage supporting a drilling machine (3) and provided with guide surfaces in slidable engagement with the guides, and displacing means for displacement of the carriage along the guides. At least one guide surfce (5a) of the carriage is formed by a spacer (5) supported by the carriage. For automatical eliminatin of the clearance between the feeding beam and the carriage, the spacer is pressed against a wedging surface (8) provided on the carriage and extending essentially in parallel with the guide. The carriage is provided by means (9) for displacement of the spacer in between the guide surface (6a) of the guide of the feeding beam and the wedging surface (8) of the carriage so that the growth of clearance caused by wearing of the spacer is avoided as the wearing increases.

Abstract: A coupling arrangement for a percussion drilling machine for coupling of a shank (7) unrotatably to a frame bushing (2) rotatably mounted in a frame and rotated by a rotating device. The frame bushing is provided with axial driving grooves (12) opening towards the shank and the shank is provided with axial counter grooves (13) opening towards the frame bushing. Rod-like wedge pieces (11) are mounted each in a pair of grooves formed by the grooves. The cross-section of each wedge piece comprises an arched surface portion (11a) and at least one planar surface portion (11b). Such wedge piece can adjust its position by turning in one groove of the pair of grooves so that the planar surface of the wedge piece is pressed into a planar contact with the planar surface of the other groove.

Abstract: A method of regulating a grinding process in a pocket grinder pressing a wood batch in at least one pocket against a rotating grindstone with a grinding plate movable in the pocket calculates the apparent pulp quantity produced at measuring points at fixed intervals of the grinding stroke and changes in the wood batch density which occur during the grinding stroke. The value thus calculated is compared with a target value for the pulp quantity to be produced and the grinding process regulated thereby to reach the target value. To make the pulp quantity produced as even as possible, the calculated value of the apparent pulp quantity produced is corrected in relation to the hydraulic pressure used during the grinding stroke.

Abstract: A supporting arrangement for a feed device for a drilling machine of a rock drilling unit (2) comprising a feed device (3) for a drilling machine (4), a cradle (5) supporting the feed device longitudinally displaceably and a supporting device (10) which is extendable in parallel with the feed device for supporting the feed device against a tunnel wall. The supporting device is supported by the cradle so that it remains stationary with respect to the cradle when the feed device is displaced.

Abstract: A method for optimizing percussive drilling, especially rock drilling, in which method the operation of the drilling device is adjusted for a desired drilling result to be obtained. According to the invention, a stress wave created in a drill rod as a result of a stroke is measured and the drilling device is adjusted on the basis of the measured stress wave. The adjusting is carried out e.g. by means of the damping rate or the spectrum of the measured stress wave or the shape of the stress wave and/or the energy fed by the different portions thereof.

Abstract: Frame construction for a pressure grinding machine of press type, which frame construction comprises a gastight, pressure-proof grinding chamber, bearing housings for a grinder member revolving in the grinding chamber, as well as at least one press chamber for the pulpwood and a press device limiting the press chamber on one side. The frame construction consists of two separate parts, namely a pressure frame, which constitutes the said grinding chamber and press chamber and which substantially receives the pressure forces resulting from the positive pressure prevailing in the grinding chamber, and a power frame, which connects the press device and the bearing housings of the grindstone to each other and which substantially receives the tensile and circumferential forces resulting from the grinding and from the pressing of the wood against the grindstone.

Abstract: A method for feeding a wood batch into a pressure grinder, according to which method the wood batch is first fed into a pressurizable feeding device (9) and thereafter from the feeding device into a continuously pressurized grinding chamber (5) to make contact with a grinding means (3) rotating in the grinding chamber. The wood batch is fed from the feeding device into the grinding chamber essentially in a horizontal plane in the direction of the axis (4) of rotation of the grinding means for maintaining proper order of the wood batch during the feeding operation. In a feeding device for carrying out the method the feeding device (9) is positioned on the side of the grinding chamber (5) so that the bottom (10a) of the feeding pocket (10) formed by the feeding device is essentially in level with the bottom (5a) of the grinding chamber. The feeding device is provided with a pushing means (17) displaceable in the feeding pocket towards the grinding chamber in parallel with the level of the bottom.

Abstract: A method of determining the properties of fiber pulp by separating a batch of a predetermined volume, by measuring its temperature, and by filtering water from it by means of a pressure difference. In accordance with the present invention, substantially all the water is filtered off from the pulp mixture, an air flow is produced through the filtered pulp cake by means of a pressure difference, the resisting effect of the pulp cake on the flow of air is measured, and the pulp cake is weighed, whereafter the properties of the pulp are calculated on the basis of the measurements, from mathematical models developed for this purpose.

Abstract: Pressure fluid operated percussion drilling machine comprising a frame (1) forming a cylinder space (2) for an axially movable percussion piston (3). The frame is provided with channels (4,7) connectable to a pressure fluid source (5) and to a pressure fluid container (8) respectively for pressurizing the cylinder space alternately on each side of the percussion piston in order to move it back and forth. The frame is also provided with means (12) for connection of a drilling rod (13) to the frame for directing strokes on the drilling rod by means of the percussion piston. A pressure fluid operated rotation mechanism (18) is mounted on the frame for rotating the drilling rod, which mechanism is connected to said channels for rotating the mechanism by means of a pressure fluid. The frame is provided with two outlet channels (7,19) terminating in the cylinder space at a distance from each other in the direction of movement of the percussion piston.

Abstract: A method of feeding cement into a drill hole for cement bolting of a rock, according to which a feeder pipe (2) is pushed into the hole essentially to the bottom of the hole portion to be filled with cement, cement is fed into the hole beginning from the bottom of the hole portion, and the pipe is displaced outwards in the hole when the cement fills the hole. The feeding of cement is stopped and the pipe is removed when the amount of cement is sufficient to fill the gap between the wall of the hole and the rock bolt to be pushed into the hole. The displacement of the pipe is controlled by means of the filling pressure (TP) caused by the cement fed between the pipe tip and the bottom of the hole portion to ensure that the hole is reliably filled despite possible cracks and crushed zones.

Abstract: A feed storage for drill rods for a long-hole drilling apparatus, said feed storage comprising a magazine provided with fixed guides (11) for storing drill rods (13) in parallel with each other, a delivery opening (14) defined by the guides for transferring drill rods one at a time into and out of the guides, and a feed device provided with gripping means (27) extending between the drill rods positioned in the guides for feeding the drill rods towards and away from the delivery opening in the guides, and a transfer device (9) comprising at least one transfer arm (29) provided with gripping jaws (31) and pivotably mounted on a pivot shaft (30) which is fixed with respect to the magazine so that the gripping jaws are displaced transversally with respect to the axial direction of the drill rods between the delivery opening of the guides and the drilling axis (A) of a drilling machine. The guides of the magazine guide the drill rods with their axes in the same plane.

Abstract: The invention relates to a method of and a device for drying a paper web or the like, in which method a web (8) and a wire or felt (9) supporting it are subjected to a deairing treatment. The wet web (8) and the wire or felt (9) thus deaired the thereafter passed between two displaceable airtight surfaces of high heat conducting properties, between which surfaces the web (8) is enclosed in the drying zone over the whole width thereof. The surface making contact with the web (8) is heated and the surface making contact with the wire or felt (9) is cooled by liquid in order to condense the water evaporated from the web (8) into the wire or felt (9). The wire or felt (9) is separated from the dried web (8) after said surfaces and the water condensated is removed therefrom. In a drying process the surface making contact with the wire or felt (9) is formed by the outer surface of a cooled rotating metal cylinder (2).

Abstract: The invention relates to a method and mechanism for preliminary anchoring of a wire rope bolt in a bore by means of friction. The object is to eliminate the need to use wooden wedges or to bend the strands of the rope backwards, procedures which are time-consuming. In accordance with the invention, a permanent deformation is produced in the wire rope bolt in such a way that friction force is produced when parts of the bolt press against the wall of the bore. The mechanism may comprise, fitted at a point prior to feeding rolls, a bending roll, which bends the wire rope before it is fed into the bore. The circumference of the feeding roll can be V-shaped, in which case it causes the bent wire rope to rotate and to become helical.

Abstract: The invention relates to a device for treatment of wastewater by means of an anaerobic fermentation, which comprises a closed tank 1 and therein elements 2, 10 for feeding wastewater to be treated into the tank, elements 5, 6 3 for removing treated water, gas and sludge from the tank, elements 4 for mixing the contents of the tank and elements 7 for separating gas in the upper part of the tank. Deviating from the traditional completely mixed reactors the tank has been devided into two, on each other placed parts by means of the filters, which tank comprises a filter media bed containing at least one filter media which acts as an attachment bed for methane bacteria and on it a sludge and fluidized material bed, whereat the mixing elements 4 are below the filter and the feed elements 2, 10 for wastewater to be treated are fed below the filter 8 and the elements 5, 6 for removing treated water and gas are located in the tank part above the filter 8.