EP3215600A1

EP3215600A1 - Height-adjustment device and method for operating an agitating device

Info

Publication number: EP3215600A1
Application number: EP15801690.7A
Authority: EP
Inventors: Andreas Czwaluk; Johann Bierer
Original assignee: UTS Biogastechnik GmbH
Current assignee: UTS Biogastechnik GmbH
Priority date: 2014-11-07
Filing date: 2015-11-05
Publication date: 2017-09-13
Also published as: US20170334690A1; DE102014116246A1; US10508007B2; CA2966373A1; CA2966373C; WO2016071460A1

Abstract

The invention relates to a height-adjustment device (1) for adjusting the height of an agitating device (2) in a fermenter (101) of a biogas plant (100), a biogas plant (100) comprising a fermenter (101), a supporting unit (10), a displacement unit (6), an agitating device (2) and a height-adjustment device, and method for operating an agitating device (2). The height-adjustment device comprises a housing device (4), a drum device (5) rotatably accommodated on the housing device (4) and a displacement element (6). In this case, the displacement element (6) is operatively connected to the drum unit (5) and to the agitating device (2), and, according to the rotation direction of the drum unit (5), the displacement element (6), can be rolled up onto the drum unit (5) in sections or can be unrolled from the drum unit (5), as a result of which the agitating device (2) can be displaced upwards or downwards. A fixing device (7) is further provided, which is suitable for and designed to fix the drum device (5) at least temporarily in order to prevent the displacement element (6) from unrolling if the displacement element (6) is not held tightly between the drum device (5) and the agitating device (2).

Description

Height adjustment device and method of operation

agitator

description

The present invention relates to a

Height adjustment device, which in particular for

Height adjustment of at least one stirring device in a fermenter of a biogas plant is suitable. In this case, the height adjustment device comprises at least one housing device, at least one rotatably accommodated on the housing device drum device and at least one displacement element. The drum device is preferably provided by a cable drum and the displacement element is in particular designed as a rope. The displacement element is in

Operative connection with the drum device and the

Stirring device is at least partially on the drum device, depending on the direction of rotation of the drum device

rolled up or unrolled from the drum device. As a result, the stirring device is displaced up or down. The

The invention also relates to a biogas plant with at least one stirring device of at least one such

Height adjustment device and a method for operating a stirring device with such a height adjustment device.

In a fermenter of a biogas plant is usually

provided at least one agitator, with which the introduced into the fermenter substrate can be mixed.

As a result, the efficiency of the biogas plant can be improved because a homogeneous mixed substrate can be made available, so-called floating layers can be better avoided and gas can be expelled. In order to achieve a particularly uniform mixing of the substrate, the agitator is often arranged on a kind of mast on which the agitator is then held in height movable.

A height-adjustable agitator is also very

Easy to maintain, as the agitator for maintenance and / or

Repair work can be easily moved up to a maintenance position.

To adjust the height of the agitator is often held movable on the mast and can be driven by a rope up and down. For this purpose, the rope is unwound from a cable drum to drain the agitator and rolled up to lift the agitator on the cable drum.

The disadvantage of such a height adjustment, however, is that under certain circumstances, the agitator can settle or jam on the mast. Then the agitator can not be lowered further.

If the user continues to pull the rope from the user

Unrolled rope drum, the rope between the rope drum and the fixed stirrer is getting longer. Then the rope can get caught in the agitator in the worst case.

This creates the risk that the rope is damaged or even destroyed. In addition, other lines, which are guided together with the rope to the agitator, damaged or destroyed. In the cases described above, it is very complicated and costly to put the agitator or the fermenter back into operation.

It is therefore the object of the present invention to provide a height adjustment device and a biogas plant with such a height adjustment device, wherein safe operation is ensured. This object is achieved by a height adjustment device with the features of claim 1, by a biogas plant with the features of claim 20 and by a method for operating a stirring device with the features of claim 21. Preferred developments and refinements of

Invention are the subject of the dependent claims. Further advantages and features of the invention will become apparent from the

Exemplary embodiments.

The height adjustment device according to the invention is particularly suitable for height adjustment of at least one

Stirring device in a fermenter of a biogas plant. In this case, the height adjustment device comprises at least one

Housing device, at least one rotatable on the

Housing device recorded drum device and

at least one displacement element. The displacement element is in operative connection with the drum device and the stirring device, the displacement element depending on

Direction of rotation of the drum device at least partially rollable on the drum means or of the

Drum device is unrolled. This is the result

Stirring device can be moved up or down. Furthermore, at least one fixing device is provided, which is suitable and designed to fix the drum device at least temporarily in order to at least unwind the

To prevent displacement element when the

Displacement element not tight between the

Drum device and the stirring device is held.

Under a drum device according to the invention, in particular a cable drum to understand, which is preferably received rotatably about an axis. In this case, the axis is preferably aligned substantially horizontally and on the

Housing device of the height adjustment received. That the displacement element is in operative connection with the drum means and the stirring means is called

According to the invention in particular that the displacement element is preferably connected directly or indirectly with the two aforementioned parts. If the displacement element is not directly connected to the drum device and the stirring device, in particular connecting elements

be provided for attachment of the

Displacement element on the drum device and / or on the stirring device can be used appropriately.

According to the invention is achieved by the fixing that the rolling of the displacement element of the

Drum device is prevented, whereby the stirring device can not be moved further down. It is provided according to the invention in particular that the rolling is automatically prevented as soon as or as long as that

Displacement element is not or no longer held taut between the drum device and the stirring device.

In this case, it should be understood in particular that the displacing element is slightly under tension at least in sections. Furthermore, under tight

According to the invention, it is meant that the displacement element unrolled by the drum device is not or not substantially longer than the distance between the stirring device and the drum device.

Under up and down is movable according to the invention

In particular, it is meant that the stirring device can be displaced upwards or downwards with respect to the drum device, ie can be moved towards or away from it or towards it. The height adjustment device according to the invention offers many advantages. A significant advantage is that through the

height adjustment device according to the invention can be achieved, that the displacement element only further from the

Drum device can be picked up, if at the same time the stirring device is moved further down. As a result, damage to the stirring device can be effectively avoided, as they could otherwise result from incorrect operation and / or malfunction.

If the displacement element continues to be unrolled without the agitator being displaced further downwards at the same time, the displacement element is no longer kept taut between the drum device and the stirring device. Then, in the worst case, the displacement element can get into the rotor of the stirring device and get caught there on the agitator blades. As a result, the rotor can be damaged or even the displacement element and / or together with the

Displacement element guided to the stirring device

Supply lines are damaged or even severed. This would result in an enormous maintenance effort, which at the same time entails considerable costs.

The further unwinding of the displacement element, without the scrubber moves simultaneously with downward, can be caused by incorrect operation or malfunction. In case of a misoperation of the height adjustment device, a user could, for example, move the displacement element farther from the

Unroll the drum device without first removing the rotor

Stirring device to stop. However, the rotational movement of the rotor pushes the stirring device against the mast, on which the

Stirring device is included. The resulting static friction is sufficient to further decrease the stirring device

prevent. Then the displacement element would always be further rolled and eventually caught in the worst case in the rotor.

In the event of a system malfunction, for example, the stirrer could have jammed, causing another

Dropping of the stirring device is prevented. Again, the displacement element and / or the leads could be damaged or severed.

This is effectively prevented by the height adjustment device according to the invention in that the displacement element can only be further unrolled by the drum device, as long as or as soon as the displacement element taut between the

Drum device and the stirring device is held.

Preferably, the displacement element comprises at least one cable and / or a chain. In this case, the rope or the chain

preferably be at least partially made of metal and / or plastic. As a rope can be useful also a band, a string, a real rope or a belt

being used, these being flat, round or angular

can be configured.

Particularly preferably, the stirring device is at one

Assumed support unit along which the stirring device is displaced up and down. In this case, the height adjustment device is preferably also accommodated on the support unit or at least associated therewith. Appropriately, the

Support unit substantially aligned from bottom to top, wherein the support unit is preferably oriented substantially vertically. Particularly preferred is the

Height adjustment together with the agitator about the vertical axis rotatable or pivotable.

In preferred embodiments, the fixing device comprises at least one disc device and at least one Fixing. In this case, the fixing element can be at least temporarily brought into operative connection with the disc device. Thus, it can be achieved that the fixing device under certain circumstances, the further unwinding of

Displacement element prevented by the roller device. The drum device can also be released again as soon as the displacement element taut between the

Drum device and the stirring device is held.

Preferably, the drum means by positive engagement and / or static friction between the disc device and the

Fixing element fixable. It can be between

Disc means and the fixing preferably an adhesive force, a clamping force and / or a latching force act.

The disk device is preferably assigned to the drum device. In this case, the disk device can be particularly preferably provided on the same shaft as the drum device, wherein the rotation of the shaft is then advantageously blocked by means of the disk device.

Preferably, the disc device is at least a part of the drum device or manufactured in one piece therewith. So can be ensured in a simple manner that when fixing the disc means and the

Drum device can not be moved in at least one direction.

Preferably, the disc device is used as a brake disc

configured and the fixing element comprises at least one brake pad. In such an advantageous embodiment, the fixing device works analogously to a

Disc brake. It is on at least one side of the

Brake disc provided at least one brake pad, which can be pressed against the brake disc, as soon as the Displacement element no longer taut between

Drum device and stirring device is held.

Particularly preferably, the disk device is designed as a toothed disk. In this case, such a toothed disc preferably has at least one and in particular a multiplicity of teeth. If more than one tooth is provided, the teeth are preferably distributed uniformly along the circumference of the toothed disc.

In this case, preferably at least one tooth of the toothed disc is directed radially outwards. Preferably, all teeth are directed outwardly and distributed substantially evenly over the circumference.

In advantageous developments, the fixing element

pivotable relative to the drum means and / or the

Disk device added to the housing device.

This ensures that the fixing element can come into operative connection with the disk device when the

Displacement element no longer taut between the

Drum device and the stirring device is held. For this purpose, then pivots the fixing in the direction of

Disc means to block them. As soon as that

Shifting element is held tight again, that can

Swing fixing element away from the disk device again, thus releasing the drum device again.

Preferably, the fixing device comprises at least one biasing device. Such a biasing device may in particular comprise at least one spring and in particular at least one tension spring. In this case, biasing device is preferably associated with the fixing element.

In advantageous embodiments, the pretensioning device is then arranged between the fixing element and the housing device. In this case, the biasing device is particular arranged such that the fixing of the

Biasing device is pulled in the direction of the disc device. Thus, the fixing element in particular automatically the drum device in operative connection with the

Fix the disk device if no counter-pressure is exerted against the tensile force of the pretensioning device.

Preferably, the fixing element comprises at least one extension, a hook and / or a pawl. Such a configuration can be used advantageously in particular when the drum device by positive engagement between

Disc device and fixing is achieved.

Preferably, the fixing element comprises at least one

Cable conduit. On the one hand, this ensures that the displacement element is guided safely. On the other hand, it can also be ensured that the fixing element comes into contact with the disk device when the

Displacement element is not held tight. In addition, it can be achieved that the fixing element is pivoted away when the displacement element is held taut. This is achieved in that the displacement element has different contact points on the cable guide, depending on whether it is held taut or loose.

Particularly preferably, the fixing device comprises at least one freewheel. This can ensure that the

Drum device can not be fetched further, as long as the displacement element is not taut between

Drum device and stirring device is held. In addition, it can be achieved that the drum device can still be rolled up again, although the displacement element is not kept taut. Preferably, the freewheel is provided by at least one run-on slope on at least one tooth of the toothed disk. Thus, by positive engagement between a tooth of the disk device and the fixing a

Blocking effect can be effected. By the chamfers, however, the disc can continue to be rotated in the other direction, whereby the drum device can be further rolled up, even if the displacement element is not kept taut.

Preferably, the drum device is at least one

Gear device assigned. The transmission device is preferably arranged on the housing device or at least partially accommodated in the housing device. Such a transmission device, the drum device can be driven for example via a motor.

The biogas plant according to the invention comprises at least one fermenter and at least one stirring device which is connected to at least one support unit by means of at least one

Displacement element is arranged displaceable. Furthermore, at least one height adjustment device is provided, as described above.

The biogas plant according to the invention also offers many advantages. A significant advantage is that the biogas plant can be operated particularly reliably. In this case, in particular, the stirring devices arranged in the fermenter can be securely adjusted in height, without causing damage due to non-tightly held displacement elements.

The inventive method is suitable for operating a stirring device in a fermenter of a biogas plant, wherein the stirring device is displaceable by means of a height adjustment device along a support unit. It is the

Height adjustment device in particular designed as described above. The drum device of

Height adjustment device according to the invention by means of Fixing device at least temporarily fixed in at least one direction of rotation, whereby the further rolling of the

Displacement element of the height adjustment is particularly automatically prevented when the displacement element is not held taut between the stirring device and the drum device.

The method according to the invention also offers the advantages already described above. In particular, a safe and reliable operation of a stirring device in the fermenter of a biogas plant is provided. It can the

Stirring up and down safely without it in case of malfunction or incorrect operation to a

Damage caused by a not taut

Displacement element comes.

Further advantages and features of the present invention will become apparent from the embodiments, which are explained below with reference to the accompanying figures.

In the figures show:

Fig. 1 is a purely schematic representation of a biogas plant with a height adjustment device according to the invention;

Fig. 2 is a perspective view of an inventive

Height adjustment device in a purely schematic representation;

Fig. 3 is a purely schematic representation of a

height adjustment device according to the invention in a plan view;

Fig. 4 is a purely schematic representation of a

height adjustment device according to the invention in a view from the front; Fig. 5 is a purely schematic representation of a

height adjustment device according to the invention in a view from the side;

Fig. 6 is a purely schematic representation of a

height adjustment device according to the invention in one

View from the front along the sectional plane A-A in Figure 5;

Fig. 7 is a further purely schematic representation of a height adjustment device according to the invention in a view from the front;

Fig. 8 is a further purely schematic representation of a

height adjustment device according to the invention in a view from the side;

Fig. 9 is a further purely schematic representation of a

height adjustment device according to the invention in one

View from the front along the sectional plane in Figure 8;

10 shows a purely schematic representation of a fixing element in a perspective view; and

Fig. 11 is a purely schematic view of the fixing according to

Figure 10 in an exploded view.

In FIG. 1, purely schematically, a fermenter 101 is one

Biogas plant 100 shown in a sectional view. In the embodiment shown here, the fermenter 101 comprises a fermenter wall 103 bounding the fermenter interior 102. The fermenter interior 102 is suitable for receiving substrate 104 to be fermented.

On the right side of the fermenter 101, a platform 105 is shown purely schematically, via which a service opening 106 can be achieved in the fermenter roof 107. Through this service opening 106, the stirring device 2 can be easily achieved, especially for maintenance purposes. It is the

Stirring device 2 designed here as a stirrer 3.

In the fermenter 101 shown here, a total of three mixers 3 are provided, whereby a particularly homogeneous

Blending of the substrate 104 is achieved. It is in the embodiment shown here each mixer 3 a

Service opening 106 assigned, with only the service opening 106 of the right stirrer 3 is shown purely schematically.

The three agitators 2 can each along a

Support device 10 are moved up and down. In addition, the stirrers 3 and the longitudinal axis 25 of the

respective support unit 10 are pivoted. As a result, a particularly effective and uniform mixing of the substrate 104 in the fermenter interior 102 can be achieved.

The support units 10 each have one at the upper end

Height adjustment device 1, which each have a

Drum device 5 include. The drum devices 5 are designed as cable drums 26. At the cable drum 26 each have a displacement element 6 is added, which is designed here as a rope 8. In other embodiments, the rope 8 can also be by a chain 9 or by another

appropriate means are provided.

By means of the drum device 5, the displacement element 6 can be picked up and. As a result, the stirring devices 2 can be changed in height along the support unit 10.

When changing the height of the stirring devices 2, however, there are certain risks due to application errors and / or malfunctions. The pulling up of the stirring means 2 usually proceeds without problems. When descending the stirring 2 However, it may happen that the displacement element 6 is indeed unrolled from the drum device 5, that the

However, stirring device 2 is not displaced downwards along the support unit 10.

This can happen, for example, in the case of a malfunction if the stirring device 2 is jammed, for example, on the support unit 10. Even by incorrect operation of the biogas plant 100, it may happen that, although the displacement element 6 is unrolled from the drum device 5, the

However, stirring device 2 is not displaced downwards along the support unit 10. This can happen, inter alia, when a user wants to move the stirring device 2 down while the rotor 27 of the stirring device 2 is still rotating.

The rotation of the rotor 27 creates a certain

Stiction between the stirring device 2 and the support unit 10, whereby the stirring means 2 may not be displaced along the support means 10 under certain circumstances. Then, in the unfavorable case, it may happen that the displacement element 6 is unrolled from the drum device 5, without the stirring device 2 being moved further downwards. As a result, the displacement element 6 between the drum device 5 and the stirring device 2 would no longer be kept taut.

If the stirring device 2 is not when unrolling the

Displacement element 6 is displaced with, the length of the displacement element 6 between the drum means 5 and the stirring means 2 is getting longer, whereby the

Displacement element 6 can get into the rotor 27 of the stirring device 2 in the worst case. Then, the stirring blades 28 of the rotor 27 may come into contact with the displacement element 6 and wind it up by the rotation of the rotor 27. This could damage the

Displacement element 6 or parallel

Supply lines come. In the worst case, the displacement element 6 and / or the supply lines can also tear.

The supply lines are in the one shown here

Embodiment not shown in detail. A

Supply line may, for example, a current-carrying line for the operation of the stirring device 2 or a

Hydraulic line for the operation of the stirring device 2 be.

If the displacement member 6 is damaged or cracked, the agitator 2 is very difficult to convey along the support unit 10 toward the service opening 106 to repair the damage. In the worst case, one would have to stop the operation of the biogas plant 100 and empty the fermenter 101, so that a new displacement element 6 can be attached to the stirring device 2 via the entry into the fermenter interior 102.

The inventive height adjustment device 100 such damage can be effectively and reliably prevented, since the height adjustment device 1 according to the present invention comprises a fixing device 7, which is the rolling of the

Displacement element 6 prevents when the displacement element 6 is not taut between the drum means 5 and the

Stirring device 2 is held.

The height adjustment device 1 according to the invention is shown purely schematically in detail in Figures 2 to 12.

In Figure 2, the height adjustment device 1 according to the invention is shown purely schematically in a perspective view. The height adjustment device 1 comprises a housing device 4, on which a drum device 5 is rotatably received is. The drum device 5 is in an im

Essentially horizontally aligned axis 29 attached.

The drum device 5 is assigned a gear 24, via which the drum device 5 can be rotated from outside the fermenter 101. In this case, the gear 24 is received in or on the housing device 4.

The drum device 5 serves to receive a

Displacement element 6, which is indicated in the following figures, if at all only purely schematically. The

Displacement element 6 is provided in the embodiment shown here as a rope 8. However, it may also be designed, for example, as a chain 9. The rope 8 may be made of any suitable material, and it should be particularly suitable for use in the substrate 104.

So that the displacement element 6 can not be further unrolled, if it is not under tension or is not held tightly between the drum device 5 and the stirring device 2, the height adjustment device 1 comprises a

Fixing device 7.

The fixing device 7 serves depending on the embodiment to prevent the drum device 5 at a further rolling movement either by static friction and / or by positive locking.

For this purpose, the fixing device 7 in the embodiment shown here comprises a disk device 11 and a

Fixing element 12. The disk device 11 is designed in the embodiment shown here as a toothed disk 16, which can block the drum device 5 by a positive connection with the fixing element 12.

The toothed wheel 16 is a cheek 30 of the

Drum device 5 available. In other embodiments An additional component can also be provided as a disk device 11, which is then accommodated, for example, on the same axis 29 as the drum device 5. Also, a disk device 11, the rotation of the

Effectively prevent drum device 5.

The fixing element 12 of the fixing device 7 is pivotally received relative to the disk device 11 on the housing device 4. In this case, the pivot axis 31 in the embodiment shown approximately parallel to the axis 29 of the

Drum device 5 is provided.

The fixing element 12 also includes a S ilführung 21, which carries the displacement element 6 safely and which also the pivotal movement of the fixing element 12 for fixing or

Release of the drum device 5 causes

FIG. 3 shows the height adjustment device 1 according to FIG. 2 in a purely schematic view from above. Again, one recognizes the transmission device 24, via which the drum device 5 can be rotated. The

The drum device 5 comprises the disk device 11 of the fixing device 7, wherein the disk device 11 designed as a toothed disk 16 on the housing device 4

facing side 13 of the drum means 5 is provided. The fixing element 12 is pivotably received about the pivot axis 31 on the housing device 4.

In Figure 4, the height adjustment device 1 according to the invention is shown in a purely schematic view from the front.

In this case, one looks at the outer cheek 32 of the drum device 5 and the pivotally received on the housing device 4 fixing element 12th

In the embodiment shown here is the

Disk device 11 designed as a toothed wheel 16, wherein the Disk device 11 can not be seen in this view. The fixing element 12 comprises an extension 18 which is designed here as a hook 19 or as a pawl 20.

In the illustration shown here, the fixing element 12 is pivoted away from the disk device 11, as a result of which the extension 18 does not come into contact with the disk device 11.

Thereby, the drum device 5 can be rotated freely in both directions.

The pivoting of the fixing element 12 takes place

automatically when the displacement element 6 is held taut between the drum device 5 and the stirring device 2. Then the displacement element 6 extends in the

Rope guide 21 of the fixing element 12 that this of the

Disk device 11 is shifted away. In this case, the fixing element 12 is counter to the tensile force of the biasing element 33 of the fixing device. 7

The biasing member 33 is shown in FIG

Embodiment designed as a spring 34 and 34 as a tension spring. The spring 34 serves to automatically bring the fixing element 12 into contact with the disk device 11 when the displacement element 6 is not held taut between the drum device 5 and the stirring device 2.

Then, the tensile force of the spring 34 causes the

Fixing element 12 is pulled in the direction of the disk device 11 as soon as the displacement element 6 exerts no counterforce on the cable guide 21 against the tensile force of the spring 34.

In Figure 5, the height adjustment device 1 according to the invention is shown in a purely schematic side view of the left side. The sectional plane AA drawn in FIG. 5 is shown purely schematically in FIG. 6 in a frontal sectional view. It can be seen in Figure 6, the disk device 11, the fixing device 7, which here in one piece with the

Drum device 5 is provided. In this case, the disk device 11 at the housing device 4th

facing side 13 of the drum device 5 is provided and is designed as a toothed disc 16.

If the displacement element 6 is kept taut, is by the displacement element 6 via the cable guide 21 a

Counterforce applied against the tensile force of the spring 34, whereby the fixing element 12 of the disk device 11th

pivots away. As a result, the pawl 20 of the fixing element 12 is no longer in contact with a tooth 17 of the toothed disc 16.

In this situation, the drum device 5 can be freely rotated in both directions, whereby the agitator 2 can be displaced up and down along the support unit 10.

In FIG. 7, the movement of the fixing element 12 is pure

schematically illustrated how it occurs when the

Displacement element 6 no longer tight between the

Drum device 5 and the stirring device 2 is held. Then, the fixing member 12 by the tensile force of

Biasing device 33 is pulled in the direction of the disk device 11.

The blocked situation of the drum device 5 is shown purely schematically in FIGS. 8 and 9.

If the displacement element 6 is not taut between the

Stirring device 2 and the drum device 5 is held, the fixing element 12 of the fixing device 7 is pivoted in the direction of the disk device 11. This is done by the tensile force of the biasing member 33 of the fixing device 7. In the embodiment shown here is the

Disk device 11 designed as a toothed disc 16. In this embodiment, an extension 18 of the fixing element 12 in operative connection with at least one tooth 17 of the toothed disc 16 lead to a form fit, whereby the drum means 5 is prevented at least on further unwinding.

In the embodiment shown here, a freewheel 22 is provided on the fixing device 7. This freewheel 22 is provided by chamfers 23 on the teeth 17 of the toothed disc 16. By the run-on slope 23 is achieved that, although turning the drum means 5 in one

Direction is blocked by the pawl 20 in operative connection with a tooth 17 of the toothed disc 16 that the rolling of the displacement element 6 on the drum means 5, however, is still possible.

In another embodiment, not shown here, the disc device 11 can also be provided by a brake disc 14, wherein the fixing element 12 then at least one brake pad 15 which in operative connection with the brake disc 14, a rotation of the drum means 5 in at least one direction at least temporarily prevented. Such an embodiment is indicated purely schematically in FIG.

FIG. 10 shows an embodiment of a fixing element 12 purely schematically in a perspective view.

The fixing element 12 is pivotably held about the pivot axis 31 and comprises an extension 18, which is designed as a hook 19 or as a pawl 20. In this case, the pawl 20 is arranged on the fixing element 12 such that the pawl 20 during pivoting of the fixing element 12 can enter into operative connection with the disk device 11. The fixing element 12 comprises in the here shown

Embodiment also a cable guide 21, which is provided here by two rollers 35, 36 available.

In addition, one recognizes a fastening device 37, to which one side of the biasing element 33 can be attached. The other side of the biasing member 33 can be conveniently attached to the housing means 4, so that the fixing member 12 is pulled by the tensile force of the biasing member 33 in the direction of the disk device 11 when the

Displacement element 6 is not held tightly between the stirring device 2 and the drum device 5.

The fixing element 12 according to FIG. 10 is shown purely schematically in FIG. 11 in an exploded view. Here you can see the detailed structure of the described

Embodiment of the fixing element 12.

The fastening device 37 is thereby by a

Screw 38 provides. The rollers 35, 36 of the cable guide 21 are made of plastic in the embodiment shown here, these rollers 35, 36 on

Metal rollers 39 are provided, which means

Screw 38 are added to the fixing member 12.

List of reference numbers:

Height adjustment device 31 pivot axis

Stirrer 32 cheek

Fermenter 33 pretensioner

Housing device 34 spring, tension spring

Drum device 35 roll

Displacement element 36 roller

Fixing device 37 fastening device

Rope 38 screw connection

Chain

39 role

0 support unit

100 biogas plant

1 disc device

101 fermenter

2 fixing element

102 fermenter interior3 page

103 fermenter wall

4 brake disc

104 substrate

5 brake pad

105 platform

6 toothed disc

106 service opening

7 tooth

107 fermenter roof

8 extension

9 hooks

0 latch

1 rope guide

2 freewheel

3 starting slope

4 gear device

5 longitudinal axis

6 cable drum

7 rotor

8 stirring blades

9 axis

0 cheek

Claims

Claims :

1. height adjustment device (1), in particular for

Height adjustment of at least one stirring device (2) in a fermenter (101) of a biogas plant (100), comprising at least one housing device (4), at least one rotatably accommodated on the housing device (4)

Drum device (5) and at least one

Displacement element (6), wherein the displacement element (6) in operative connection with the drum means (5) and the stirring means (2) and wherein the displacement element (6) depending on the direction of rotation of the drum means (5) at least partially rollable on the drum means (5) or can be unrolled from the drum device (5), whereby the stirring device (2) can be displaced up or down,

characterized,

in that at least one fixing device (7) is provided which is suitable and designed for this purpose

At least temporarily fixing drum means (5) to prevent at least rolling off of the displacement member (6) when the displacement member (6) is not held taut between the drum means (5) and the stirring means (2).

2. height adjustment device (1) according to claim 1, characterized

characterized in that the displacement element comprises at least one cable (8) and / or a chain (9).

3. height adjustment device (1) one of the preceding

Claims, characterized in that the stirring device (2) is accommodated on a support unit (10) and along this up and down is displaced.

4. height adjustment device (1) one of the preceding

Claims, characterized in that the

Fixing device (7) comprises at least one disc device (11) and at least one fixing element (12).

5. height adjustment device (1) the preceding claim, characterized in that the drum means (5) by positive engagement and / or static friction between the

Disk device (11) and the fixing element (12) is fixable.

6. height adjustment device (1) one of the two

preceding claims, characterized in that the disc means (11) associated with the drum means (5).

7. height adjustment device (1) one of the preceding

Claims 4 to 6, characterized in that the

Disc means (11) at least a part of

Drum device (5) is.

8. height adjustment device (1) one of the preceding

Claims 4 to 7, characterized in that the

Disk device (11) on the housing device (4) facing side (13) of the drum device (5)

is provided

9. height adjustment device (1) one of the preceding

Claims 4 to 8, characterized in that the

Disc device (11) is designed as a brake disc (14) and that the fixing element (12) at least one

Brake pad (15) includes.

10. height adjustment device (1) one of the preceding

Claims 4 to 9, characterized in that the Disk device (11) is designed as a toothed disc (16).

11. height adjustment device (1) the preceding claim, characterized in that at least one tooth (17) of the toothed disc (16) is directed radially outward.

12. height adjustment device (1) one of the preceding

Claims 4 to 11, characterized in that the fixing element (12) pivotally relative to the

Drum means (5) and / or the disc means (11) on housing means (4) is held.

13. height adjustment device (1) one of the preceding

Claims 4 to 12, characterized in that the fixing device (7) comprises at least one biasing means (33).

14. height adjustment (1) one the preceding

Claim, characterized in that the

Biasing means (33) between the fixing element (12) and the housing means (4) is arranged.

15. height adjustment device (1) one of the preceding

Claims 4 to 14, characterized in that the fixing element (12) comprises at least one extension (18), a hook (19) and / or a pawl (20).

16. height adjustment device (1) one of the preceding

Claims 4 to 15, characterized in that the fixing element (12) comprises at least one cable guide (21).

17 height adjustment device (1) one of the preceding

Claims, characterized in that the fixing device (7) comprises at least one freewheel (22).

18 height adjustment device (1) to the preceding claim, characterized in that the freewheel (22) by at least one run-on slope (23) on at least one tooth (17) of the toothed disc (16) is provided.

19. Height adjustment device (1) one of the preceding

Claims, characterized in that the

Drum means (5) is associated with at least one transmission device (25).

20. Biogas plant (100) with at least one fermenter (101), at least one support unit (10), at least one

Displacement element (6) and at least one

Stirring device (2), wherein the stirring device (2) by means of the displacement element (6) on the support unit (10) is displaceable up and down,

characterized,

in that at least one height adjustment device (1) according to one of the preceding claims is provided

21. A method for operating a stirring device (2) in a fermenter (101) of a biogas plant (100), wherein the

Stirring device (3) by means of a height adjustment device (1) according to one of claims 1 to 19 along a

Support unit (10) is displaceable,

characterized,

that the drum device (5) by means of

Fixing device (7) is fixed at least temporarily in at least one direction of rotation, whereby the further

Unwinding of the displacement element (6) automatically

is prevented when the displacement element (6) is not taut between the stirring device (2) and the

Drum device (5) is held.