SE1051063A1 - Method and apparatus for cutting peat production - Google Patents

Description

15 20 25 30 BRIEF DESCRIPTION The purpose of the present invention is to provide a method and an apparatus for implementing the method in which the above-mentioned disadvantages can be eliminated, i.e. the number of machines, work phases and waste can be minimized.

The object of the invention is achieved by a method and a piece peat machine, which are characterized by what is stated in the independent patent claims. The preferred embodiments of the invention are presented in the dependent patent claims.

The invention provides several advantages. For example, the use of milled peat, which has a lower calorific value and energy density than piece peat, can be replaced to some extent by the use of piece peat thanks to this invention. The advantages of the invention are undeniable, since the need for total energy consumption and the number of machines needed for production can be reduced. The major disadvantages, i.e. dust and fire risks associated with milled peat, can be almost completely eliminated.

A major advantage of the present invention is that it becomes possible and profitable to utilize smaller harvest areas due to smaller equipment and increased efficiency. In this context, it can also be stated that the production of piece peat is not as dependent on the weather as the production of milled peat. The present invention further increases the independence of piece peat production from unstable weather conditions. With this invention, the disadvantages associated with current peat production methods can be significantly reduced or completely eliminated.

The present invention significantly reduces the number of production steps, such as turning, scraping and screening, the total energy consumption, the energy consumption used for the extraction process, and the time used for extraction per energy unit. Based on successful test runs with a prototype, the extraction process for piece peat can be renewed and simplified. The smoothness of the extraction process, the overall efficiency and environmental friendliness are significantly improved. What has been stated above means that the economic competitiveness of piece peat rises to a new level compared to other forms of energy and without significant support from society.

DIRECTIONS In the following, the inventive method of operation is explained first in general and then in more detail according to the attached drawings, where 10 15 20 25 - Figure 1 presents a piece peat extraction machine according to the invention; - Figure 2 shows an extraction screw, bearing and the structure of the rotating claws; - Figure 3 shows the structure of an extraction pipe, outlet pipe and a discharge hatch; - Figure 4 shows the structure of hydraulic cleaning and opening tubes, as well as the cutting device and its attachment; - Figure 5 highlights the method made possible by the apparatus; - Figure 6 shows an embodiment of a grid roller; - Figure 7 shows an embodiment of a method; and Figure 8 highlights the implementation of the method.

DESCRIPTION OF SOME EMBODIMENTS The land selected for peat production is first cleared of trees, stumps and visible stones. Peat is lifted from the bog by using a screw that draws the peat into the extraction pipe in a steady flow. At the other end of the screw, a counter-thread is arranged to reduce the pressure and wear on the rear end of the extraction pipe. In this way, the working pressure is transferred to and formed at the peat outlet pipes. Inside the extraction pipe, spiral blades are arranged which, together with the outer edge of the rotating screw, crush possible branches and twigs before they reach the outlet pipes. For additional safety, discharge claws can be attached to the shaft of the extraction screw at each location for each outlet pipe. The discharge claws have the task of preventing any debris from entering the outlet pipes.

However, if for some reason debris clogs the outlet pipes, the hydraulic opening and cleaning tubes can be guided into the outlet pipes to clear the pipes of any obstructions. The massive opening and cleaning tubes can push the obstructing material from the outlet pipes back towards the auger. At the same time, when the opening and cleaning tubes are about to enter the outlet pipes, a discharge hatch on the opposite side of the outlet pipes opens, allowing all debris to exit the apparatus via the discharge hatch. 10 15 20 25 30 35 The discharge claws rotating into the extraction pipes ensure that all remaining debris exits via the discharge hatch. The outlet pipes can be cleaned in such a way that the driver neither has to leave the tractor cab nor stop the extraction process.

The extraction tube also has a bearing assembly at the front end, which extends the life of the piece peat apparatus. A bearing mounting frame prevents roots and stones from entering the extraction auger. The bearing mounting frame also acts as a guide sled when the apparatus goes to the working depth and travels there. It also prevents the apparatus from being damaged when it hits obstacles.

The peat chunks extruded through the outlet pipes can be cut with a cutting device into pieces of the desired length and then laid on a belt conveyor or similar, which then transfers the pieces to a suitable distance from the flattening device to a peat chunk field stack. This process ensures that peat chunks can be extracted even from small areas many times over compared to current extraction methods. In addition, this new field stack method significantly speeds up the production of peat chunks and improves the quality. In this method, the peat chunks do not need to be turned and scraped together on a field containing dust and contaminants. In this method, peat chunks are produced as stock directly to the peat chunk field stack.

A new layer of peat is placed on top of the first produced/extracted and already naturally dried peat layer until an airy and fast-drying clean peat field pile is completed. This means that the peat pieces remain on top of each other and dry out completely without any scraping or turning. Therefore, all sieving phases can also be avoided because foreign particles are not mixed into the peat.

With the help of that invention, lump peat can be transferred at the beginning of the extraction process to a lump peat field stack, which is thus achieved with only one work phase and one machine. Compared to the traditional extraction method, several work phases can be omitted as unnecessary.

With this invention, piece peat is produced directly into a plurality of overlapping layers and the field stack formed thereby can preferably be collected directly onto the wheels by means of a reloader and then transported to the nearest peat stack or to an incineration plant. This new production method thus contains only two work phases, i.e. the production of peat pieces directly into a field stack and the reloading of the pieces into a transport unit.

Figure 1 shows an embodiment of a piece peat extraction machine according to the invention, where an extraction pipe or pipe casing 2 is attached to a steel beam frame 1, and inside the extraction pipe 2 a bearing-mounted extraction screw 3 is arranged. The pipe 10 15 20 25 30 has two functions. On the one hand, it covers the screw and thus protects it against, for example, stones. On the other hand, the pipe cooperates with the screw in such a way that the extraction pipe determines the space in which the extraction screw can rotate and prevents the peat from falling off the screw. On the lower part of the extraction pipe, a bearing bracket and a protective frame 4 are arranged, which also function as a guide sled and which protect the screw 3 from damage.

The extraction pipe 2 is mounted to the steel frame 1 at an angle of approximately 35 degrees with respect to the ground. At the lower end of the extraction pipe 2 there is an additional hatch 5, which can be opened with a hydraulic cylinder, in order to increase the feed of peat to the screw 3 if necessary. At the other end of the extraction screw 3 a gearbox is mounted to transmit the power needed to the extraction screw 3. The shaft of the extraction screw is provided with a roller chain-gear joint 7, which improves the durability of the shaft. The power coming to the gearbox 6 is preferably transmitted by a link shaft 8 from the power source such as a tractor.

The hydraulically operated opening and cleaning tubes 9, the discharge hatch 10 and the additional hatch 5 can be controlled from the tractor cab. A bearing-mounted cutting unit 11 operates automatically using the kinetic energy of the peat pieces. That is, the cutting unit may contain a certain number of blades arranged at a certain angle to each other in a rotating structure. When the peat pieces emerge from the outlet pipes, it pushes one of the blades in the cutting unit, which causes the unit to start rotating and therefore the next blade can cut off the peat pieces. The peat pieces are normally 50 to 200 mm long and have a diameter of 40 to 80 mm. The length of the pieces can be adjusted by changing the number of blades in the cutting unit and the diameter of the pieces by using outlet pipes of a different diameter.

A belt conveyor 12 or the like is preferably secured below the outlet pipes 13 and the cutting unit 11 by means of two horizontal pins 14, one of which is provided with a vertical pin, which is provided with a hinge. By means of the hinge pin, the belt conveyor can be turned to the side and locked during road transport. The height of the drop end of the belt conveyor is adjusted by means of a winch 15 and a mooring rod 16.

In this way, the pieces of peat can be guided vertically to the desired location. Guidance of the pieces in the longitudinal direction can be improved by providing the conveyor with a triangular plate or the like. The belt conveyor can be provided with guide slats, whereby the pieces of peat coming out of the outlet pipes are distributed evenly on the conveyor belt. With the help of the slats, the pieces keep the correct track on the belt conveyor. In this way, the pieces can be distributed evenly on the pile of peat.

The use of the belt conveyor 12 prevents waste from the bog from being mixed into the peat chips because the peat chips are directly stored in a storage area from where they are loaded. Thus, there is no need to turn, scrape and screen peat chips on the bog field that contain contaminants. Contaminants, such as stones and rootstocks, traditionally impair the energy properties of the peat chips.

The winch 15 can be used mechanically or hydraulically. The power source of the conveyor 12 can be a hydraulic motor 17, with which the speed of the conveyor 12 can also be easily adjusted from the cabin, if necessary.

Figure 2 shows the structure of the extraction screw 3, the bearing assembly and the rotating claws 21, where the extraction screw 3 has bearing arrangements at both ends to improve the functional reliability and prevent the screw from being damaged. The screw 3 consists, as shown in the figure, of a grinding blade 18 that goes around the outermost edge of the screw 3, an extraction thread 19, and its counter thread 20 and hard steel claws 21 attached to the shaft of the screw 3 and arranged between the thread 19 and the counter thread 20. If necessary, the discharge claws 21 can be provided with mixing wings 22 or the like. The incoming peat in the extraction pipe is guided into the non-threaded section and the outlet pipe 13 under high pressure, mixed due to under the influence of the discharge claws and the mixing wings and is pressed through the outlet pipes 13 to a belt conveyor 12 or the like.

Figure 3 shows the structure of the extraction pipe 2, the outlet pipes 13 and the discharge hatch 10, where the extraction pipe 2 is provided with outlet pipes 13, which are mounted at an angle which may be about 35 degrees from the center line of the extraction pipe in such a way that the pipes are in a straight line with the conveyor 12. The frame mounting of the outlet pipes 13 may be firmly arranged to the extraction pipe 2. The frame mounted pipes are provided with a flange, to which a series of outlet pipes of different diameters and shapes may preferably be attached.

The extraction tube 2 can also be provided with spiral-like hard steel blades 24, which extend to the counter-thread of the extraction screw 3 and are firmly mounted on the inner wall of the extraction tube 2. The blades 24 of the extraction tube 2 and the blade 18 together grind the waste entering the extraction tube 2. When an outlet tube 13 or some outlet tubes are blocked, the discharge hatch 10 is opened simultaneously by means of a hydraulic cylinder, when the opening and cleaning tubes 9 start to move towards the outlet tubes 13. Thus, the material that the opening and cleaning tubes 9 have removed from the inside of the outlet tubes 13 can fall away from the unit via the discharge hatch 10.

Figure 4 shows the structure of the opening and cleaning tubes 9 and the cutting unit 11 and their attachment. The opening and cleaning tubes 9 are preferably attached firmly to the steel frame 25 of the control unit, which is capable of moving by means of a counterpart of the control unit and the hydraulic cylinder so that the outlet tube 13 can be cleaned and the tubes 9 can be returned to the starting position without the driver having to leave the tractor cab or stop the extraction process in any way. In practice, this can be carried out so that when the driver notices a blockage in one or more of the outlet tubes, he can press a control button in the cab. This causes the discharge tubes 9 to quickly enter and exit the outlet tubes 13. This cleaning operation can in practice be so fast that there is no reason to stop the extraction of piece peat during the cleaning.

The blades of the cutting unit 11 are preferably attached to link arms 26 which are attached to the frame 25 of the control unit. When the discharge tubes 9 start to move, the link arms 26 lift the cutting blades 11 so that the discharge tubes can move without hindrance. The cutting unit 11 is mounted on bearings at both ends and it works on the basis of the kinetic energy of the peat pieces. When the cutting blade rotates around its own axis, it cuts the peat pieces into pieces of the desired length before the peat pieces fall onto the conveyor. The desired length of the pieces and thus the drying rate of the pieces can be adjusted by changing the number of cutting blades and the size or diameter of the outlet tubes 13.

Figure 5 shows a harvesting method applied to a machine, where the belt conveyor 12 or the like is preferably attached to the frame and below the outlet pipes and the cutting unit of the piece peat machine. The length of the belt conveyor can be adjustable. One way to achieve this is to allow the belt conveyor to rotate about three points, the positions of which are adjustable with respect to each other. When the maximum length of the conveyor is desired, the three points can be aligned. If a shorter conveyor is desired, the three points can be moved to a shape of a triangle. The height of the fall end of the belt conveyor can be adjusted during production by a winch 15 and a mooring rod 16. Thereby, the piece peat can be guided to the desired location in the field stack.

Alternatively, the length of the conveyor can be fixed. Then the pieces of peat can be led from one side of the stack over the top to the other side of the peat field stack when the peat machine is close enough to the peat field stack. 10 15 20 25 30 35 This invention makes it possible to harvest from the same pile to the same field stack several times in such a way that these several overlapping layers gradually form a dry and clean field stack 27, which can preferably be collected by a reloader directly to a transport unit and transported to a peat stack or to the place of use.

Figure 5 shows four layers of piece peat 31 transported to the field stack.

As the figure shows, the peat pieces in the three lowest layers are reduced in size compared to the fourth and highest layer of peat pieces that has just been extracted. As the peat pieces dry out, the pieces move and space is created between adjacent pieces in the same layer and between pieces in different layers. Thus, by allowing the peat pieces to dry out naturally for about 3 to 6 days, preferably less than two weeks, before adding a new layer of peat pieces to the peat pile, an airy and well-ventilated pile is obtained.

The base of the peat field pile 27 can be formed to have a grid 30, which extends transversely to the tip of the pile. Rainwater can thus run along the grid on the sides of the pile away from the tip. In this way, even the lowest layer of peat has good drying conditions even in rainy weather.

Figure 6 shows an embodiment of a grid roller 28, the metal sections of which 29 form a grid on the field stack base, when the base for the layers is formed. The grid allows rainwater to pass through the base so that the lowest piece peat layer does not have to be on a wet surface. Already after a couple of hours of rolling, the base surface and the grid become harder and form a water-repellent surface.

The field stack method will now be described with reference to Figure 7. At 702, the base for the field stack is formed. Prior to this step, a production area or plot may be cleared of trees, stumps and visible rocks. The base may have a width of 2 to 8 meters, preferably about 6 meters, for example. The fall rows of piece peat may be about 50 cm wide. A layer of piece peat refers to the covering of piece peat moved onto the field stack with fall rows. A layer here may refer to piece peat placed on one or both sides of the piece peat field stack.

Typically, the width of a sward is approximately 20 meters and thus, in this example, 14 meters of the sward width remain for efficient production. The widths of the field stack or of the sward are not limited to the examples shown above. The field stack to which the piece peat layer is collected is thus narrow in comparison with the total width of the sward, i.e. the width of the field stack is less than half of the total width of the sward, may also be less than one third of the total width of the sward. The field stack 10 15 20 25 30 is preferably located in the middle of the sward, but may alternatively be in other locations depending on the properties of the sward.

The length of the field stack depends on the area of the bog. There may be a variety of fields on the bog and they may be separated from each other by ditches. The length of the field stack is essentially the same as the length of the production field. At the ends of the production field, space can be left so that a tractor can drive around the field stack.

The field stack can therefore be slightly shorter than the production field.

The base of the field pile can first be levelled with a levelling screw, which levels the base and can possibly make the base inclined towards the ditches in such a way that the highest point of the base is in the middle of the base. Finally, the base can be rolled with a grid roller so that grids are formed on both sides of the base, where the grids then allow rainwater to pass through the base. The rolled surface of the base hardens and becomes water-repellent just a few hours after the treatment. In this way, an optimal drying base is formed for drying out the peat lumps.

The base of the field stack may have the shape of a slightly sloping gable roof or similar.

When constructing and leveling the base on which the first production layer of the peat field stack from the tegen is produced, there may be a slope of at least 5 cm/meter on both sides of the base so that the drainage of rainwater is ensured and that the pieces dry out as quickly as possible regardless of the weather. Alternatively, the first layer of peat can be collected on a flat base, in which case the lowest layer of peat may not dry out as well as the other layers placed on top of the lowest layer.

In 704, peat is extracted from the bog. In 706, peat is pressed into the outlet pipes. In 708, peat is cut into piece peat. In 710, a first layer of piece peat is transported on the base, so that it constitutes the first layer of the piece peat field stack. Extraction of piece peat according to the method can be carried out on an area covering the land excluding the area covered by the field stack.

In 712, the first layer of peat in the field stack is allowed to dry out naturally under the influence of sun and wind without turning and/or scraping.

In 714, which may take place after 3 to 6 days, preferably over two weeks, after the extraction of the previous layer, the following layer of peat chunks is extracted and transported on top of the previous layer. The just extracted layer of peat chunks which is on top of the previous layer of peat chunks in the field stack is then allowed to dry out for a few days before adding a new layer of peat chunks to the field stack. 10 15 20 25 30 35 10 The above steps may then be repeated a number of times during the harvest season. The number of layers which are collected from the pile may be 2 to 16, for example. It must be noted that when peat chunks are collected to the field stack, a water-repellent surface is formed after just a few hours. As drying progresses, the size of the chunks is reduced.

When there are multiple layers in the stack, the drying and movement of the pieces creates a structure with space between the pieces. The field stack having layers of piece peat and drying out naturally is thus automatically very well ventilated. In fact, the higher the number of layers, the better the conditions for drying out. In the method described above, only the lowest layer of piece peat touches the ground surface. 1716, at the end of the harvest season, the piece peat (layers) that have dried out naturally in the field stack are picked up, i.e., reloaded for transportation to a storage stack or an incinerator. Natural drying here refers to drying out under the influence of sunshine and wind only. There is no need for scraping and turning of the piece peat. Figure 8 illustrates the implementation of the method. It shows a piece peat production field 850 with ditches 852, 854 on both sides of the production field.

Peat chips are collected into a peat chip field pile 862, which may be substantially in the center of the production field 850. The peat chip field pile 862 is narrow compared to the overall width of the production field 850. The field pile is substantially the same length or is slightly shorter than the production field. The base of the peat chip field pile 862 may have a base with a tip 856 and at least partially sloping sides 858, 860. The slope allows rainwater to drain away from the peat chip pile to the bog and further toward the ditches 852, 854.

Figure 8 also illustrates the movement of the tractor performing the extraction of peat chips. The tractor is shown in 4 different positions from 854A to 854D. In position 854, the peat chipping machine is close to the peat chipping field stack and the belt conveyor can be in its short configuration. Peat chips can be transported to the side closer to the tractor or over the tip 856 to the other side of the field stack. In position 854B, the machine is close to an edge of the production field. Since the distance to the field stack 862 is long, the belt conveyor must be at its maximum length.

Position 854C highlights the situation where the machine goes around the field stack from one side to the other. In position 854D the machine works on the other side of the field stack than in positions 854A to 854C and the working direction is shown by an arrow on the front of the machine.

Thus, the method and apparatus relate to the production of piece peat from a production area. The production area may be a rectangular field with a width of about 20 meters, for example, and limited by ditches on both sides of the field. The length of the production field may be from tens of meters to several kilometers.

Extracted peat from the peat field is transported to a peat field pile, where the peat is allowed to dry out naturally, i.e. without scraping or turning.

The piece peat field stack can be located in the middle of the tegen, for example. This allows the working machine to work around the field stack and bring the extracted piece peat from both sides of the field stack to the field stack. The field stack is narrow compared to the total width of the tegen, i.e. the width of the bearing base is less than half or less than one third of the tegen width.

The field stack may have a base formed in the form of a ridge with a peak and at least partially inclined sides. The angle of inclination may be 2 to 10 degrees.

Each side of the field stack can be provided with grids that extend transversely towards the tip. This allows rainwater to drain away from the base and ensures that the collected peat chips at the base have optimal drying conditions.

New layers of peat can be collected for the field stack at intervals of a few days, for example, depending on weather conditions.

The machine that performs piece peat production has an auger to extract piece peat from the production area. The machine is also equipped with a belt conveyor that is configured to transport the just extracted piece peat to the storage base.

The machine may have means for adjusting the belt conveyor to convey piece peat to the field stack from different distances between the machine and the stack. This may be accomplished by adjusting the length of the belt conveyor.

The machine may also be configured to pre-adjust the height of the belt conveyor in such a way that the lump peat can be dropped onto the field stack from a short drop distance between the belt conveyor and the top surface of the field stack of lump peat. In this way, breakage of the lump peat is avoided when it is dropped onto the stack. The drop end of the conveyor for lump peat may be adjustable in height by means of a winch and a mooring rod. In one embodiment, a lump peat machine is provided that includes an extraction tube that encapsulates an extraction screw comprising a thread and a counter-thread for the same, the machine further including an outlet tube that allows lump peat to exit the extraction tube. On the shaft of the extraction screw between the extraction thread and the counter-thread, on the non-threaded section of the screw, a discharge claw may be positioned in the same position as the outlet pipe, which discharge claw is configured to crush and remove waste from the end of the outlet pipe. Thus, the discharge claw rotates together with the screw and clears the end of the extraction pipe on each rotation cycle.

In one embodiment, a peat chipping machine is provided that includes a extraction tube encapsulating an extraction screw, the machine further including an outlet tube that allows peat chips to exit the extraction tube. The peat chipping machine further includes a discharge and cleaning tube that can be inserted into the outlet tube to remove any obstructions therein. The machine may include a discharge hatch in the extraction tube that allows the obstruction to exit the extraction tube, which opening of the discharge hatch may be coordinated with the operation of the exit and cleaning tubes such that operation of the opening and cleaning tubes is configured to trigger the opening of the discharge hatch.

In one embodiment, a peat chipping machine is provided that includes a extraction tube encapsulating an extraction screw, the machine further including an outlet tube that allows peat chips to exit the extraction tube. The peat chipping machine further includes a rotating cutting unit for cutting peat exiting the outlet tube into pieces, the cutting unit being configured to rotate based on the kinetic energy of the peat chips. Thus, falling peat chips rotate the cutting unit having a plurality of blades.

The piece peat machine may comprise grinding blades positioned within the extraction tube, and an extraction screw, to the shaft of which an extraction thread and its counter-thread are installed.

In the peat chipper, on the shaft of the extraction screw between the extraction thread and the countershaft, discharge claws and mixing blades made of hard steel can be attached to the shaft.

The peat chipping machine may include an additional hatch in the extraction tube for increased peat feeding and an emptying hatch for waste removal and for servicing. In the peat chipping machine, the additional hatch, emptying hatch, and opening and cleaning tubes may be remotely controlled so that it is not necessary to interrupt the extraction process. In the peat chipping machine, the peat chipping guide conveyor may be pivotable to the side and lockable with a locking pin during transport.

In the piece peat machine, the lower end of the extraction pipe may be provided with a fastening device and protective frame, which preferably operate as a guide sled or the like. 13 It is obvious that the invention is not limited to the embodiments presented above, but it can be modified within the scope of the patent claims.

Claims (14)

10 15 20 25 14 Patent claims Production method for piece ton / comprising: - extraction (704) of peat from a peat production field by using an extraction screw (3) arranged in an extraction pipe (2); - pressing (706) of the recovered peat into exit pipes (13) arranged at the extraction pipe (2); cutting (708) of the pressed peat coming out of the outlet pipes (13) into pieces of peat (31), - characterized in that the piece of peat (31) is transported (714) using a belt conveyor (12) or the like which extracted from different distances (854A-854D) on the peat production field (850) to a piece peat field stack (862) so that the just extracted piece peat is carried on top of previously extracted and without turning and scraping dried piece peat. Method according to claim 1, characterized in that the piece peat (31) is transported to a field stack (862) which is substantially of the same length as the peat production field (850). A method according to claim 1, characterized in that the peat (31) is transported to a peat field stack (862) which is narrow compared to the width of the peat production field (850). A method according to claim 1, characterized by: - recovering peat (31) from both sides of the peat field stack (862), which is located substantially in the middle of the peat production field (850); and - transporting the peat (31) extracted from both sides of the peat field stack (862) to the peat field stack (862) located substantially in the middle of the peat production field (850). Method according to claim 1, characterized by: - transporting the just extracted peat as a layer of peat (31) to the peat field stack (27) containing one or more previously recovered and naturally dried layers of peat (31). Method according to claim 1, characterized by: - transporting the just extracted piece peat to the piece peat field stack (862), which has a ground base formed into a ridge with a tip (856) and sloping sides (858, 860). Method according to claim 1, characterized by: - transporting the just extracted peat to the peat field stack (862), which has a ground base formed into a ridge with a tip (856) and sloping sides (858, 860), and was and one of the sides has grids (30) extending transversely to the tip (856). Method according to claim 1, characterized by: - transporting the just extracted peat (31) on top of peat in the peat field stack (27), which peat has dried out naturally in less than two weeks. A piece peat extraction machine, comprising - an extraction screw (3) for extracting peat from a peat production field (850), the extraction screw (3) being arranged in an extraction pipe (2); outlet pipe (13) arranged to the extraction pipe (2) for pressing the peat; and - means for cutting (11) the pressed peat coming out of the exit pipes (13) into pieces of peat, characterized by: - a belt conveyor (12) or the like configured to transport the just extracted peat to a piece of peat field stack (862 ); and - means for regulating the length of the belt conveyor (12) or the like for transporting the just extracted peat to the peat field stack (862) from different distances (854A-854D) between the machine and the peat field stack (862) so that the just recovered piece peat is transported on top of the previously recovered piece peat. and without turning and scraping dried peat. 10 15 _20 16 The piece peat extraction machine according to claim 9, characterized in that the machine comprises means for adjusting the height of the belt conveyor (12) so that the piece peat can be deposited on the piece peat field stack from a short falling distance between the belt conveyor (12) and the piece peat field surface (862). A piece peat machine according to claim 9, characterized in that the machine comprises a recovery pipe (2) which houses a recovery screw (3), comprising a thread (19) and a counter-thread (20) for said thread (19), the machine further comprises an outlet pipe (13) for allowing the pressed piece peat to come out of the extraction pipe (2). Part peat machine according to claim 11, characterized in that on the axis of the extraction screw between the extraction thread (19) and the counter-thread (20) an emptying claw (21) is placed at the position of the outlet pipe (13), which emptying claw (21) is configured to remove waste from the end of the outlet pipe (13). A piece peat machine according to claim 11, characterized in that the machine comprises opening and cleaning tubes (9) for removing obstruction from the outlet pipes (13). A peat machine according to claim 9, characterized in that the machine comprises a rotary cutting device (11) for cutting the peat into pieces of peat (31), which cutting device (11) is configured to rotate on the basis of the kinetic energy of the peat (31). ).