BE1031281B1 - Segment shaft for a roller grate system and roller grate system with such a segment shaft - Google Patents

Abstract

The invention relates to a segment shaft (10) for a roller grate system with at least one base shaft (11), several transport disks (12) and several spacer elements (13), wherein the transport disks (12) and the spacer elements (13) are arranged on the base shaft (11) in a rotationally fixed manner, wherein at least one of the spacer elements (13) is arranged between two adjacent transport disks (12), wherein the segment shaft (10) has at least one wear indicator device (14) which is at least partially arranged on and/or in the base shaft (11) and is adapted to visually indicate at least one degree of wear of the segment shaft (10) and/or to output an electrical signal characterizing the degree of wear.

Description

tBE2023/5036

Segment shaft for a roller grate system and roller grate system with such a segment shaft

Description

The invention relates to a segment shaft for a roller grate system and a

Roller grate system with such a segment shaft. A segment shaft according to the

The preamble of patent claim 1 is known, for example, from DE 100 65 403 A1.

Roller screen systems are generally used for screening and cleaning coarse, dirty materials in mining. The roller screen systems are used as screening machines that have several driven screening shafts with

Transport discs. The transport discs are usually designed with a special, e.g. polygonal, outer contour or are mounted eccentrically. This gently sets the materials to be screened in a rolling motion during operation. This loosens and sieves out clayey or earthy components that adhere to the coarse material. The roller grate systems are particularly well suited for

Classification of coarse, moist, sticky or clayey materials.

Roller grate systems can be used, for example, in coaling plants for pre-screening, to relieve the load on crushers and for classification after crusher crushing. Furthermore, the roller grate systems can be used for pre-screening of overburden and natural rock and for homogenizing the mass flow for downstream plant components, for example a downstream crusher for

be used.

Due to the high load on the screen components of roller grate systems, high wear occurs, particularly on the screen shafts that are in direct contact with the coarse material. Screen shafts are known from the state of the art in which transport discs are welded onto a base shaft and connected by means of

Spacer elements are arranged at a certain distance from each other in the axial direction. Cast screen shafts are also known.

Depending on the degree of wear, such screen shafts must be completely replaced or repaired at great expense.

Alternatively, the aforementioned DE 100 65 403 Al provides a

The screening shafts of the screening device are at least

2 BE2023/5036 are partially constructed as segment shafts. The screen shafts have a base shaft with grate disks pushed onto them, which are positively connected to the base shaft. Furthermore, the state of the art, for example from the

Hazemag and EPR GmbH, a form-locking system for segment shafts from

Roller gratings are known in which polygon discs and spacer elements are pushed positively onto a base shaft and clamped together.

This system allows the replacement of the pushed-on parts, especially in case of wear.

The screening shafts known from the state of the art have the disadvantage that the condition of the components affected by wear, for example the

Transport discs, spacers and the base shaft, while the

operation is not recorded. To determine the degree of wear of these components, the roller grate system must be stopped and the screen shafts must be

This is time-consuming and entails increased costs. Another disadvantage is that the wear on the screen shafts can be so advanced that a refurbishment or repair of the

Screen waves are no longer possible.

The invention is therefore based on the object of developing a segment shaft for a

Roller grate system, where maintenance effort is reduced and thus maintenance and operating costs are reduced. Furthermore, the

The invention is based on the object of specifying a roller grate system with a segment shaft.

According to the invention, the above-mentioned object is achieved with regard to the

Segment wave is solved by the subject matter of claim 1. Regarding the

Roller grate system, the above-mentioned object is achieved by the subject matter of claim 14.

Specifically, the task is carried out by a segment shaft for a roller grate system with at least one base shaft, several transport discs and several

The transport discs and the spacer elements are arranged on the base shaft in a rotationally fixed manner, with at least one of the

Spacer elements are arranged between two adjacent transport disks. The segment shaft has at least one

Wear indicator device which is mounted on and/or in the base shaft at least

3 BE2023/5036 and is adapted to optically indicate at least one degree of wear of the segment shaft and/or to output an electrical signal characterising the degree of wear.

The invention has the great advantage that by displaying the

The condition of the segment shaft can be recognized early on by the degree of wear. This prevents irreparable damage to the segment shaft caused by wear. This leads to increased operational reliability of the segment shaft and reduced repair and operating costs. In particular, the

Segment shaft reduces the risk of serious damage, e.g. to a roller grate system, and thus the risk of resulting personal injuries.

Furthermore, the segment shaft according to the invention allows improved operational planning for the operating personnel. The wear indicator shows the current wear status of the segment shaft and also allows conclusions to be drawn about the remaining service life of the segment shaft, taking operating conditions into account. This makes it possible to determine the optimal

Determine the maintenance time for the segment shaft. On the one hand, this makes maintenance planning easier for the operating personnel. On the other hand, it enables the segment shaft to be used efficiently. The segment shaft therefore reduces maintenance effort and thus maintenance costs.

The wear indicator visually shows the degree of wear on the segment shaft. The operating personnel can therefore assess the condition of the segment shaft in terms of wear from the outside. The degree of wear can be seen from the outside using the wear indicator.

Additionally or alternatively, the wear indicator device is adapted to output an electrical signal characterizing the degree of wear.

For this purpose, the wear indicator can be connected to an external control device, e.g. a system control, to transmit signals. The electrical

The signal can then be further processed by the external control device to provide the operating personnel with an indication corresponding to the degree of wear. Such an indication can, for example, be a warning and/or

Maintenance message. Additionally or alternatively, the notice may be a

It is possible that if the segment shaft is particularly worn, the external control device,

4 BE2023/5036 in particular independently carries out an emergency shutdown of the roller grate system.

The message can be displayed to the operating personnel on a monitor and/or be an audio signal.

The optical wear indicator and/or the output of the electrical

Signals are preferably transmitted in segment wave mode.

Wear indicator device is therefore preferably adapted to the

The degree of wear can thus be identified during operation of the segment shaft. A roller grate system in which the segment shaft according to the invention is used does not therefore have to be stopped in order to determine the state of wear of the segment shaft. The

Wear indicator device therefore offers the operating personnel the possibility to determine and/or recognize the degree of wear of the segment shaft during its rotation in operation. The segment shaft according to the invention thus shortens the downtime of the roller grate system and increases the efficiency of the

system increased.

For the purposes of the application, the degree of wear is understood to be a snapshot of the condition of the segment shaft, which shows the wear on the

Segment shaft, in particular at one or more shaft positions. The wear corresponds to the removal of material from the segment shaft by the conveyed or screened bulk material.

Advantageously, the wear indicator device is adapted to several

wear levels of the segment shaft. In other words, the

Wear indicator device depending on advanced or progressive

Wear on the segment shaft indicates a corresponding degree of wear or outputs a signal characterizing this degree.

The segment shaft has, as described above, several transport discs and several spacer elements. The transport discs and the

Spacer elements are arranged on the base shaft. The transport discs are used to transport the bulk material or soil and/or

The transport discs can therefore alternatively be used as

are called conveyor discs.

One of the spacer elements is arranged between two of the transport discs. It is also possible that more than one spacer element can be arranged between two of the transport discs. The

Spacer elements form spacers that hold the transport disks on the 5 base shaft in a predetermined axial position. Particularly preferably, the spacer elements have a smaller radial extension than the

Transport discs on.

The base wave forms a carrier wave that drives the transport discs and the

Spacer elements. The transport discs and the

Spacer elements are arranged on an outer circumference of the base shaft. The

The wear indicator itself is located on the base shaft, whereby the

Wear indicator device, such as the transport discs and the

Spacer elements, preferably on the outer circumference of the base shaft. The

The base shaft also serves to carry the wear indicator. Alternatively or additionally, the wear indicator can be at least partially in the

fundamental wave. For example, when the fundamental wave is formed as

Hollow shaft, the wear indicator can be partially, in particular completely, integrated into the hollow shaft. The arrangement of the

Wear indicator device (external) on the base shaft and/or inside the

The advantage of the base shaft is that two levels of wear monitoring can be implemented. On the one hand, the degree of wear from the outside radially to the base shaft is displayed and on the other hand, the degree of wear of the base shaft itself. This further increases operational reliability.

The segment shaft according to the invention is preferably made of different

These segment components are, for example, the

Transport discs and spacer elements. This can also include the

Wear indicator device. The segment shaft can have several of the aforementioned wear indicator devices. The segment shaft is preferably of modular construction. In other words, the segment shaft preferably forms a built shaft.

Preferably, the segment shaft according to the invention is used in a

Roller grate system for screening and/or conveying coarse, dirty

Materials are used in mining, for example. However, the use of

6 BE2023/5036

Segment shaft is not limited to roller grate systems. It is possible that the

Segment shaft is alternatively used in a different type of screening plant.

Preferred embodiments of the invention are set out in the dependent claims.

In a preferred embodiment, the wear indicator is arranged at least in sections radially between the base shaft and at least one of the transport disks and/or at least one of the spacer elements. In other words, the wear indicator is arranged or formed between an outer circumference of the base shaft and at least one transport disk arranged on the base shaft. Alternatively or additionally, the wear indicator can be arranged between an outer circumference of the base shaft and at least one transport disk arranged on the base shaft.

A spacer element can be arranged or designed. The advantage here is that as the wear of the segment shaft progresses, it is possible to see whether the base shaft is already affected by wear or not. Based on this display, the operating personnel can decide whether the segment shaft needs to be replaced or whether it can still be operated for a certain period of time, in particular a remaining service life. This increases the efficiency of the segment shaft and thus, for example, a roller grate system that uses the segment shaft.

In a further preferred embodiment, the

Wear indicator device at least partially axially between one of the

Transport discs and at least one adjacent spacer element. In other words, the wear indicator device can be arranged between mutually facing end faces of the transport disc and the adjacent

Alternatively or additionally, the

Wear indicator device can be arranged at least partially axially between two adjacent spacer elements. In other words, the

Wear indicator device can be arranged between facing end faces of two adjacent spacer elements.

Wear indicator preferably extends from the

Basic wave radially outwards. It is advantageous if the

Wear indicator device with an outer circumference of the spacer elements. In this embodiment, it is advantageous that the degree of wear is displayed in the radial direction towards the base shaft and a wear profile

7 BE2023/5036 and/or a wear rate can be derived from it. This further facilitates operational planning, particularly with regard to the optimal maintenance or replacement time of the segment shaft.

Within the scope of the application, the radial arrangement or the axial arrangement of the wear indicator device is relative to a central longitudinal axis of the

fundamental wave. The term “radial” means, for example, perpendicular to the

Central longitudinal axis and the term “axial” parallel to the central longitudinal axis of the

fundamental wave.

It is generally possible that the wear indicator is arranged at least partially on at least one of the spacer elements. This can be realized by at least a part of the wear indicator being integrated into the

Spacer element is recessed in the radial direction.

In a particularly preferred embodiment, the

Wear indicator at least one at least partially colored

Display element that is fixed to the base shaft. The colored

The display element can be a coloured disk. Alternatively or additionally, the coloured display element can be a sleeve-shaped section, in particular a

Color sleeve and/or a colored tube. This has the advantage that the operating personnel can quickly and easily see visually which

degree of wear of the segment shaft.

The coloured display element is preferably connected to the base shaft in a form-fitting manner. Alternatively or additionally, the coloured display element can be connected to the

It is advantageous if the colored display element is connected to the base shaft in a form-fitting and/or force-fitting manner. The colored display element is particularly preferred.

Display element is pushed onto the base shaft in a form-fitting manner. The colored

The display element is preferably connected to the base shaft in a rotationally fixed manner. The colored display element can be arranged radially between the base shaft and at least one of the transport disks and/or at least one of the spacer elements. Additionally or alternatively, the colored display element can be arranged axially between at least one of the transport disks and at least one adjacent spacer element. Additionally or alternatively,

8 BE2023/5036 the coloured display element is axially arranged between at least two adjacent

Spacer elements must be arranged.

It is possible that the colored display element is pushed onto the entire base shaft. Alternatively, the colored display element can be arranged in an area of the base shaft with an increased amount of wear.

In other words, the colored display element can be in a certain

axial area of the base shaft and in particular not extend over the entire length of the shaft.

Preferably, the colored display element has several layers that differ in color and are arranged radially one above the other. The colored

Display element can have several colour rings that form radially superimposed layers. In other words, the coloured

Display element has several color layers. The layers can be made of a solid-colored polyurethane material or at least have a solid-colored polyurethane material in sections.

The layers preferably have the same radial thickness, with the exception of that layer, in particular a radially inner layer, which radially borders the base shaft. This has the advantage that a uniform

Wear volume is provided between the individual layers.

This means that when changing the coloured layers, especially when

Color change, the operating personnel can estimate a remaining service life taking into account the throughput of the bulk material sieved or conveyed up to that point.

Preferably, the radially inner layer has an increased radial thickness, at least in relation to the adjacent layer of the colored display element. This preferably has a radial thickness that is 0 to 20 percent greater than the radial thickness of the further, in particular adjacent, layer or layers. The radially inner layer thus has a sufficient residual thickness to rule out failure of the segment shaft.

This allows the operating personnel to specify a replacement interval for the segment shaft.

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In a preferred embodiment, the wear indicator comprises at least one color layer which is applied to an inner circumference of at least one of the

Spacer elements and/or an inner circumference of at least one of the

Transport discs and/or on an outer circumference of the base shaft at least in sections. The color layer can comprise a colorant with which the inner circumference of the spacer element and/or the

The inner circumference of the transport disc and/or the outer circumference of the base shaft is coated. The paint layer disappears after progressive wear on the

Segment shaft, this is an indication for the operating personnel to decide whether the shaft should be replaced or continued to be operated for the remaining service life.

The wear indicator may comprise at least one colorant-containing

Color cartridge, in particular a color capsule, which is integrated in at least one of the transport disks and/or at least one of the spacer elements. The wear indicator device can comprise several such color cartridges. Preferably, the color cartridge is integrated in the transport disk and/or the

The spacer element is embedded and aligned in such a way that it releases the colorant when it comes into contact with a bulk material to be screened during operation, thereby coloring the bulk material. This has the advantage that the operating personnel can recognize the current degree of wear of the segment shaft from the colored bulk material and, based on this, take precautions for the segment shaft, i.e. the

exchange or continued operation.

For example, an optical detection device, in particular at least one optical measuring device and/or at least one optical sensor, can be provided which detects colored material or bulk material.

The detection device can be configured to output an electrical signal when a colored bulk material is detected. This signal can be provided to a control center, for example.

In a further embodiment, the wear indicator device has at least one light-detecting sensor, in particular a light sensor, which is integrated in the base shaft and is connected to at least one external

Control device for transmitting the electrical signal. The advantage here is that the fundamental wave is monitored separately, so that a heavy

Damage to the segment shaft and thus, for example, to a roller grate system is prevented. The light-detecting sensor can be inductive or wired

10 BE2023/5036. By integrating the sensor into the fundamental wave, it is protected from contamination and damage.

Preferably, the light-detecting sensor is connected to the external control device wirelessly, in particular via Bluetooth, infrared and/or Wi-Fi, or by wire.

The transport disks and/or the spacer elements are preferably connected to the base shaft in a form-fitting and/or force-fitting manner, in particular detachably. The transport disks and the spacer elements and in particular the wear indicator device are preferably pushed onto the base shaft in a form-fitting manner. In addition, the transport disks and the spacer elements and in particular the wear indicator device are preferably axially clamped together. This modular structure of the segment shaft enables a quick and easy replacement of damaged or worn

components, so that maintenance effort is further reduced.

Preferably, the transport disks have a polygonal, in particular triangular, outer circumference. Alternatively, the transport disks can have an elliptical outer circumference or a star-shaped outer circumference. Alternatively, the transport disks can have a rotationally symmetrical outer circumference. The segment shaft can

Transport discs with different, aforementioned, outer circumferences.

The basic shaft is preferably a solid shaft or at least partially a hollow shaft.

According to a secondary aspect, the invention relates to a roller grate system with several segment shafts according to the invention, which are rotatably mounted in a frame, wherein the segment shafts are spaced apart from one another transversely to their longitudinal axes in such a way that at least between two of the

Segment waves form a gap. Reference is made to the advantages explained in connection with the segment wave. In addition, the

Roller grate system may alternatively or additionally have individual or a combination of several of the features previously mentioned with regard to the segment shaft.

11 BE2023/5036

The invention is explained in more detail below with reference to the accompanying drawings. The embodiments shown are examples of how the segment shaft according to the invention can be designed.

In these show

Fig. 1 is a view of the longitudinal side of a segment shaft according to a preferred embodiment of the invention;

Fig. 2 shows a cross section through the segment shaft according to Fig. 1;

Fig. 3 is a perspective view of a wear indicator of the

Segment shaft according to Fig. 1;

Fig. 4 is a perspective view of a transport disc of a

Segment shaft according to another inventive

embodiment; and

Fig. 5 shows a longitudinal section through a segment shaft according to a further embodiment of the invention.

In the following description, the same reference numbers are used for identical and equivalent parts.

Fig. 1 shows a segment shaft 10 according to a preferred inventive

embodiment, wherein several of the segment shaft 10 are preferably in a

Roller grate system for screening and conveying coarse, dirty

Materials used in mining. The roller grate system, for example, loosens clayey or earthy components that adhere to the coarse material and carries out a screening process. Such a roller grate system is particularly suitable for the classification of coarse, moist, sticky or clayey

Materials. This includes in particular rocks of any shape and type.

However, the use of the segment shaft 10 is not limited to roller east systems. The segment shaft 10 according to the invention can also be used in other

screening plants can be used.

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The segment shaft 10 has a base shaft 11, several transport disks 12 and several spacer elements 13. As can be clearly seen in Fig. 1 and 2, the transport disks 12 have a polygon-shaped outer circumference 24. In other words, the transport disks 12 have an outer circumference 24 in

The transport disks 12 are not limited to the design with a polygonal outer circumference 24. For example, one or more of the transport disks 12 can have an elliptical or star-shaped

outer circumference. Rotationally symmetrical outer circumferences 24 are possible.

The spacer elements 13 are spacers which hold the transport disks 12 at a predetermined longitudinal axis position on the base shaft 11. The

Spacer elements 13 are sleeve-shaped. The base shaft 11 is designed as a hollow shaft, with its longitudinal ends each closed by a shaft journal 26. This is shown in Fig. 5, for example.

The transport disks 12 and the spacer elements 13 are arranged on the base shaft 11 in a rotationally fixed manner. The base shaft 11 has a central longitudinal axis L on which the transport disks 12 and the spacer elements 13 are arranged coaxially. The transport disks 12 and the spacer elements 13 are connected to the

Base shaft 11 is connected in a form-fitting manner, in particular in a rotationally fixed manner. Additionally or alternatively, the transport disks 12 and/or the spacer elements 13 can be connected to the base shaft 11, in particular at least partially, in a force-fitting manner.

Specifically, the transport discs 12 and the spacer elements 13 are arranged on a

outer circumference 21 of the base shaft 11. On the

Transport discs 12, the spacer elements 13 and their

The positive connection with the base shaft 11 will be discussed in more detail later. Alternatively, it is possible for the spacer elements 13 to be pushed onto the base shaft 11 without being in positive engagement with the base shaft 11.

As shown in Fig. 2, the segment shaft 10 further comprises a

Wear indicator device 14 adapted to indicate a degree of wear of the

Segment shaft 10 to be visually indicated. The wear indicator device 14 has several colored display elements 15 which are arranged on the base shaft 11 in a rotationally fixed manner.

13 BE2023/5036

As shown in Fig. 3, the colored display elements 15 each form a

Color disc 16. The color disc 16 has several layers 17a, 17b, 17c in the radial direction, which differ in color. Overall, the

Color disk 16 has three layers 17a, 17b, 17c with different colors, which are arranged radially one above the other. It is possible that the color disk 16 alternatively has a single color layer. Further alternatively, the color disk 16 can have at least two color layers, which differ in color and are arranged radially one above the other. It is also possible that the

Color disc 16 has more than three layers with different colors.

In the present embodiment, the color disk 16, as already mentioned above, comprises three color layers 17a, 17b, 17c. A first 17a of the

Color layers 17a, 17b, 17c are arranged radially outward, a second 17b of the color layers forms an intermediate layer and a third 17c of the

Color layers 17a, 17b, 17c are arranged radially inward. The second

Color layer 17b is radially between the first color layer 17a and the third

Color layer 17c arranged.

The first color layer 17a forms an outer circumference of the color disk 16. In other words, the first color layer 17a forms a radially outer

Completion of the color layer 16. The outer circumference, in particular the radially outer end, of the color disk 16 is cylindrical. The second color layer 17b extends in the circumferential direction of the color disk 16 between the two color layers 17a, 17c. The third color layer 17c borders on the base shaft 11. More specifically, the third color layer 17c is connected to the

fundamental wave 11 in contact. According to Fig. 2 it is shown that a

A positive connection is created by engagement between the third color layer 17c and the base shaft 11.

Each of the color layers 17a, 17b, 17c represents a degree of wear of the

Segment shaft 10 in the area of the color disc 16. The color disc 16 of the

Segment shaft 10 is designed in such a way that it can indicate a total of three different degrees of wear due to its three color layers 17a, 17b, 17c.

For example, the first color layer 17a is blue, the second color layer 17b is yellow and the third color layer 17c is red. Each of the colors corresponds to a

Degree of wear. The degree of wear corresponds to a snapshot of the

Condition of the segment shaft 10, which indicates the wear on the segment shaft 10 in

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area of the respective color disc 16. The wear corresponds to a

Material removal on the segment shaft 10 by material to be conveyed or screened

bulk material and reflects progressive wear on the segment shaft 10.

The first and second color layers 17a, 17b have a radial thickness which in

is substantially the same. Alternatively, the first and second color layers 17a, 17b may have a different radial thickness. The third color layer 17c has an increased radial thickness compared to the color layers 17a, 17b.

The radial thickness of the third color layer 17c is between 0 percent and 20

percent greater than the radial thickness of the first and second color layers 17a, 17b. This provides the operating personnel with a replacement interval for the

Segment shaft 10 enables.

All three color layers 17a, 17b, 17c are continuous in the circumferential direction. In other words, the color layers 17a, 17b, 17c are ring-shaped. The color layers 17a, 17b, 17c can each have a

Single element. For example, the color layers 17a, 17b, 17c can each be a ring element that is arranged on top of one another. The ring elements are preferably made of a solid-colored material. It is advantageous if the ring elements are made of a colored plastic material. This applies both to the variant in which the color layers 17a, 17b, 17c

Individual elements are, but also for another variant in which the

Color layers 17a, 17b, 17c are part of a single part. The colored

The plastic material can be a colored polyurethane. The ring elements can therefore be differently colored polyurethane rings. Other plastics or other materials other than plastic are possible. It is therefore possible that the color disk 16 is a single part. Alternatively, the color disk 16 can be made up of several parts, in particular consisting of several ring elements. The

Color layers 17a, 17b, 17c can also encircle the central longitudinal axis L.

be color stripes.

The color disk 16 forms a separate component that is pushed onto the base shaft 11 in a form-fitting manner. The color disk 16 is, as can be seen in Fig. 2, connected to the base shaft 11 in a rotationally fixed manner. Fig. 2 essentially shows a

Cross section through the segment shaft 10 in a longitudinal section Vh with increased

wear probability. The longitudinal section Vh runs

15 BE2023/5036 along the central longitudinal axis L of the basic shaft 11. In Fig. 1, for example, the

Longitudinal section Vh with increased wear probability along the

Central longitudinal axis L of the base shaft 11. In other words, the

Longitudinal section Vh with increased wear probability a central

Longitudinal section of the segment shaft 10. In the present embodiment, the color disks 16 are therefore arranged in the longitudinal section Vn. It is also possible that the color disks 16 are arranged in longitudinal areas along the central longitudinal axis L outside the longitudinal section Vh, in particular eccentrically, in order to enable comprehensive wear detection.

In Fig. 1 it is clearly visible that in the longitudinal section V of the segment shaft 10 the colour disks 16 are each arranged axially between two spacer elements 13. In the longitudinal section V two of the spacer elements 13 are arranged between the transport disks 12. The colour disks 16 are each arranged between a

Front side of the spacer elements 13. Also shown in Fig. 1 is that an outer circumference 29 of the color disks 16 is aligned with the respective outer circumference 31 of the two spacer elements 13, the first color layer 17a being visible from the outside.

In addition, the wear indicator device 14 can have at least one further

Color layer which is applied to an inner circumference 18 of at least one of the

Spacer elements 13 and/or an inner circumference 19 of at least one of the

Transport disks 12 and/or on an outer circumference 21 of the base shaft 11 is applied at least in sections. This can, for example, be a

Coating and/or a paint coat. The further paint layer is preferably radially between the base shaft 11 and at least one of the

Transport discs 12 and/or at least one of the spacer elements 13 are arranged.

As described above, the transport discs 12, the

Spacer elements 13 and the color disks 16 are positively connected to the base shaft 11. For this purpose, the base shaft 11 has several parallel to the

The base shaft 11 has grooves 27 which extend along the central longitudinal axis L and are formed on the outside. Specifically, the base shaft 11 has three grooves 27 which extend into a

outer circumference 21 of the base shaft 11. Alternatively, the

Base shaft 11 may have fewer or more than three grooves 27, which in the

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Outer circumference of the base shaft 11. In general, the base shaft 11 is not limited to the number of three grooves. The grooves 27 are formed over the entire length of the outer circumference 21 of the base shaft 11 parallel to the

Central longitudinal axis L. As shown in Fig. 2, the grooves 27 are in

The grooves 27 are evenly distributed in the circumferential direction.

The circumferential direction of the base shaft 11 is offset from one another by 120 degrees.

The transport disks 12, the spacers 13 and the color disks 16 have a radially inwardly extending web 28 for each groove 27 of the base shaft 11, which engages in the groove 27. The color disk 16 is therefore attached to the outside of the

Base shaft 11 is arranged in a form-fitting manner. The transport discs 12, the

Spacer elements 13, the color disks 16 and the base shaft 11 are thus positively connected to one another by a tongue and groove system. As described above, it is possible for the spacer elements 13 to be simply pushed onto the base shaft 11 without engaging the base shaft 11. Additionally or alternatively, the transport disks 12 and/or the spacer elements 13 and/or the color disks 16 can be connected to the

Basic shaft 11 must be connected in a force-locking manner.

The transport discs 12, the spacers 13 and the color discs 16 are detachably connected to the base shaft 11. This has the advantage that, for example, damaged and/or worn components can be replaced quickly and easily by

The segment shaft 10 comprises a clamping unit (not shown) through which the transport disks 12, the spacers 13 and the color disks 16 on the base shaft 11

Are releasably clamped together. The transport discs 12, the

Spacer elements 13 and the color disks 16 can be clamped to the base shaft 11 mechanically, electromechanically, hydraulically and/or pneumatically.

The segment shaft 10 is constructed in segments. The transport disks 12, the spacer elements 13 and the color disks 16 form individual segments that are pushed onto the base shaft 11. The segment shaft 10 is thus constructed in a modular manner. In other words, the segment shaft 10 forms a built

Wave,

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Fig. 4 shows an example of one of the transport disks 12 of a segment shaft 10 according to a further embodiment of the invention. The segment shaft 10 according to Fig. 4 preferably comprises one or more features of the segment shaft 10 according to Figs. 1 to 3.

The segment shaft 10 according to Fig. 4 comprises a wear indicator 14, which in addition or alternatively to the wear indicators described with reference to Figs. 1 to 3

Color disks 16 has a color cartridge 22 containing a colorant, which is integrated in at least one of the transport disks 12. According to Fig. 4, the

Ink cartridge 22 is embedded in the transport disk 12 on the outside. The

The color cartridge 22 is accessible from the outside. The color cartridge 22 has a capsule in which the colorant is filled. If the wear on the transport disk 12 progresses during operation so that the color cartridge 22 comes into contact with the bulk material to be screened and conveyed, the colorant flows out of the

Color cartridge 22 and thereby colors the bulk material. This means that the

It is visually apparent to the operating personnel that a certain degree of wear of the

Segment wave 10 is present.

According to Fig. 5, a segment shaft 10 according to another inventive

embodiment shown, which has a wear device 14 with a

Sensor system for wear monitoring. The segment shaft 10 and the wear device 14 according to Fig. 5 preferably additionally have one or more features of the segment shaft 10 or the wear device 14 according to Figs. 1 to 3 and according to Fig. 4.

The sensor system of the wear device 14 according to Fig. 5 has a light-detecting sensor 23 (shown schematically). In particular, the

Sensor system may have several light-detecting sensors 23. The light-detecting sensor 23 may also be referred to as a light sensor. The light-detecting sensor 23 is integrated in the base shaft 11 and is connected to an external control device (not shown) for transmitting an electrical

signal. The fundamental wave 11 is a hollow wave, which is connected to

Longitudinal ends are closed by shaft journals 26. The light-detecting

Sensor 23 is adapted to detect the radiation radiating into the interior of the fundamental wave 11.

to detect light and accordingly send an electrical signal to the external

The electrical signal characterizes a

Degree of wear of the segment shaft 10.

18 BE2023/5036

The light-detecting sensor 23 can be powered inductively or by wire. By integrating the sensor 23 into the base wave 11, it is protected from contamination and damage. The light-detecting sensor 23 is preferably connected to the external control device wirelessly, in particular via Bluetooth, infrared and/or WLAN, or by wire.

It is then pointed out that the characteristics of the aforementioned

Embodiments are not limited to the individual embodiments, but can be freely combined with one another.

19 BE2023/5036

List of reference symbols 10 Segment shaft 11 Base shaft 12 Transport disks 13 Spacer elements 14 Wear indicator device 15 Display element 16 Color disk 17a first layer 17b second layer 17c third layer 18 Inner circumference of the spacer elements 19 Inner circumference of the transport disks 21 Outer circumference of the base shaft 22 Color cartridge 23 Light-detecting sensor 24 Outer circumference of the transport disks 25 Hollow shaft 26 Shaft journal 27 Grooves 28 Webs 29 Outer circumference of the color disk 31 Outer circumference of the spacer elements

L Central longitudinal axis

Vn area with increased probability of wear

Claims (14)

20 BE2023/5036 CLAIMS 1. Segment shaft (10) for a roller grate system with at least one base shaft (11), several transport disks (12) and several spacer elements (13), wherein the transport disks (12) and the spacer elements (13) are arranged on the base shaft (11) in a rotationally fixed manner, wherein at least one of the spacer elements (13) is arranged between two adjacent transport disks (12), characterized by at least one wear indicator device (14) which is at least partially arranged on and/or in the base shaft (11) and is adapted to optically display at least one degree of wear of the segment shaft (10) and/or to output an electrical signal characterizing the degree of wear. 2. Segment shaft (10) according to claim 1, characterized in that the wear indicator device (14) is arranged at least in sections radially between the base shaft (11) and at least one of the transport disks (12) and/or at least one of the spacer elements (13). 3. Segment shaft (10) according to claim 1 or 2, characterized in that the wear indicator device (14) is arranged at least in sections axially between one of the transport disks (12) and at least one adjacent spacer element (13) or is arranged axially between two adjacent spacer elements (13). 4. Segment shaft (10) according to one of the preceding claims, characterized in that the wear indicator device (14) has at least one at least partially colored indicator element (15), in particular a color sleeve and/or a color disk (16), which is arranged on the base shaft (11) in a rotationally fixed manner. 21 BE2023/5036 5. Segment shaft (10) according to claim 4, characterized in that the colored display element (15) has several layers (17a, 17b, 17c), in particular color rings, which differ in color and are arranged radially one above the other. 6. Segment shaft (10) according to claim 4 or 5, characterized in that the display element (15) is connected to the base shaft (11) in a form-fitting and/or force-fitting manner, in particular detachably. 7. Segment shaft (10) according to one of the preceding claims, characterized in that the wear indicator device (14) comprises at least one further color layer which is applied at least in sections to an inner circumference (18) of at least one of the spacer elements (13) and/or an inner circumference (19) of at least one of the transport disks (12) and/or to an outer circumference (21) of the base shaft (11). 8. Segment shaft (10) according to one of the preceding claims, characterized in that the wear indicator device (14) has at least one color cartridge (22) containing a colorant, in particular a color capsule, which is integrated in at least one of the transport disks (12) and/or at least one of the spacer elements (13). 9. Segment shaft (10) according to one of the preceding claims, characterized in that the wear indicator device (14) has at least one light-detecting sensor (23) which is integrated in the base shaft (11) and is connected to at least one external control device for transmitting the electrical signal. 10. Segment shaft (10) according to claim 9, characterized in that 22 BE2023/5036 the light-detecting sensor (23) is connected to the external control device wirelessly, in particular via Bluetooth, infrared and/or Wi-Fi, or by wire. 11. Segment shaft (10) according to one of the preceding claims, characterized in that the transport disks (12) and/or the spacer elements (13) are connected to the base shaft (11) in a form-fitting and/or force-fitting manner, in particular releasably. 12. Segment shaft (10) according to one of the preceding claims, characterized in that the transport disks (12) have a polygonal outer circumference (24), an elliptical outer circumference or a star-shaped outer circumference. 13. Segment shaft (10) according to one of the preceding claims, characterized in that the base shaft (11) is a solid shaft or at least partially a hollow shaft. 14. Roller grate system with several segment shafts (10) according to one of the preceding claims, which are arranged one after the other in a frame and are rotatably mounted by bearing blocks, wherein the segment shafts (10) are spaced apart from one another transversely to their longitudinal axes in such a way that a gap is formed at least between two of the segment shafts (10).