CN106927186B

CN106927186B - Tubular conveyor belt

Info

Publication number: CN106927186B
Application number: CN201511016401.7A
Authority: CN
Inventors: 赫尔诺特·格罗斯克罗伊茨; 屈文德
Original assignee: Shanxi Phoenix Conveyor Belt Co ltd
Current assignee: Shanxi Phoenix Conveyor Belt Co ltd
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2020-12-11
Anticipated expiration: 2035-12-30
Also published as: CN106927186A

Abstract

The invention relates to a tubular conveyor belt (1) having at least one at least sectionally formed reinforcing element (17) which extends substantially in a transverse direction (Y). The tubular conveyor belt (1) is characterized in that the reinforcing element (17) has at least one weakening (18).

Description

Tubular conveyor belt

Technical Field

The invention relates to a tubular conveyor belt.

Background

In the field of conveyor belts, conveyor belts of this type are also known which can be closed in order to transport the material to be conveyed in a closed manner by overlapping edge regions extending in the longitudinal direction, which may also be referred to as belt sides. Such a conveyor belt is also called a tubular conveyor belt. A tubular conveyor belt which is closed in the transverse or circumferential direction can be carried around by the carrying rollers and is held closed. The tubular conveyor belt is distinguished by particularly good horizontal and vertical curve adaptability

Such tubular conveyor belts usually consist of an elastomeric material in which tensile carriers are embedded, which tensile carriers are able to transmit the tensile forces of the tubular conveyor belt which is closed in an endless manner in the longitudinal direction. These tensile carriers may be metallic (e.g. steel wires) or textile (e.g. fabric tapes). These tensile supports may comprise, in particular, metallic or synthetic fabrics, braids, monofilaments or also mixed structures (Mischgebilde). These tensile carriers usually extend in a uniformly distributed manner in the transverse direction over the entire width of the tubular conveyor belt in order to ensure a uniform transmission of tensile forces. Furthermore, reinforcing inserts extending in the transverse direction can also be used as so-called transverse reinforcements (querermierrungen) in order to increase the stability of the tubular conveyor and to support the closing action of the slotted conveyor forming a closed tubular conveyor. Different variants of stretch carriers and transverse reinforcements are described in EP 0336385B 1, for example.

Tubular conveyor belts are usually produced as flat conveyor belt constructions and are then shaped into tubular conveyor belts at the point of use by means of special carrier roller systems. The restoring forces of the tubular conveyor belt acting in this case can lead to an undesirable closing behavior in the overlap region, i.e. to only a point contact of the two overlapping belt sides. The region which is only closed in a punctiform manner can be very unstable, which can lead to an undesired opening of the tubular conveyor. Thereby possibly affecting the conveyance due to external environmental influences. The conveyance may also be exported to the environment, i.e., may result in lost conveyance and contamination of the environment.

Furthermore, a relatively large closing angle can be set between the two belt sides due to the restoring force. A large closing angle can result in: a tubular conveyor belt of this type opens at the distance between the carrying rollers and the reclosing of the tubular conveyor belt on revolution to the next carrying roller causes an additional revolution resistance (autoflowstand). To overcome this additional turn resistance, additional drive power may be required.

Tubular conveyor installations are usually configured in such a way that the overlapping region of the tubular conveyor is oriented upwards in height. This may result from an excessive closing angle: the belt acquires a deflection momentum due to an increase in the resistance to revolution onto the carrier roller. These deflection moments can lead to, in unfavorable circumstances: the tubular conveyor belt passes over a plurality of carrier rollers during its movement, rotates undesirably about its longitudinal axis and the overlapping region is offset downwards. If the tubular conveyor is opened here for the reasons mentioned above, a partial or even complete, undesired emptying of the tubular conveyor may thus result.

These aforementioned effects may be avoided or at least reduced if a more reliable closure of the overlapping belt sides is possible. Thereby possibly achieving a more planar overlap and a flatter closing angle. To achieve these effects, the following different documents are known:

US 6,029,801 a1 describes a flexible conveyor belt for use as a substantially closed conveyor belt, such that the edge regions extending in the longitudinal direction can approach each other in the transverse direction in order to substantially close the interior of the conveyor belt. For this purpose, the conveyor belt should be able to be bent or folded in the longitudinal direction at a defined position. In order to simplify the bending or folding and to predetermine the folding position, the conveyor belt has a layer of transverse reinforcements which have notches in the transverse direction, at which the transverse reinforcements are broken. Bending of the conveyor belt at these locations is thereby simplified so that the desired shape of the conveyor belt can be assumed and maintained with little force. These bending positions are also predetermined by the notches of the transverse reinforcement.

US 6,540,069B 2 describes a bendable conveyor belt which can also be substantially closed by bending or folding. In order to also simplify the bending and the predetermined bending position, the inner side of the conveyor belt has wedge-shaped material depressions extending in the longitudinal direction, which are weakened at these positions in such a way that the bending can be effected first at these positions and also against small resistance forces.

In this case, it is disadvantageous, in each case with a tubular conveyor belt, that a very strong weakening of the conveyor belt is achieved in the transverse direction, since, depending on the embodiment, regions or sections are provided which are completely free of transverse reinforcements. This is desirable in both cases, since a flexible conveyor belt should be bent accordingly. This is however not a tubular conveyor belt accordingly. In a tubular conveyor belt, however, such measures may lead to too sharp a bending of the side edges, so that a round tubular shape cannot be achieved. These measures cannot therefore be transferred to a tubular conveyor belt.

GB 2195309 a1 describes a tubular conveyor belt having at least one layer consisting of woven, textile belt bodies which are broken in the transverse direction by gaps. The belts have an uneven distribution in the transverse direction in order to be able to set variable bending characteristics or restoring forces at the tubular conveyor. The rolling up of the tubular conveyor belt is thereby simplified and a shape as round as possible is achieved.

Disclosure of Invention

It is an object of the present invention to provide a tubular conveyor belt of the type mentioned at the outset in order to be able to achieve a more reliable closure of the overlapping belt sides than has hitherto been possible. In particular, a more planar overlap and a flatter closing angle should be achieved. At least one alternative to the known measures should be provided.

The object according to the invention is achieved by a tubular conveyor belt having the features according to the invention. Advantageous refinements are also specified in the invention.

The invention therefore relates to a tubular conveyor belt having at least one at least sectionally formed reinforcing element which extends substantially in a transverse direction.

The tubular conveyor belt according to the invention is characterized in that the reinforcing element has at least one weakening. This can be understood as meaning that the reinforcing element is formed very continuously in the transverse direction but has a weakening at least one location, which enables a higher bendability of the reinforcing element at that location. This makes it possible according to the invention to bend the tubular conveyor belt more easily at this point, in order to generate a lower restoring force that counteracts the bending. In this way, the closing angle in this overlapping region can be reduced, thereby making it possible to also reduce the turning resistance. However, it is also possible to transmit forces in the transverse direction via the reinforcing element.

The weakening can be realized, for example, in such a way that the cross section of the reinforcing element at this location is reduced. This can be achieved, for example, by means of a cut. A part of the material of the reinforcing element, for example a warp, weft or auxiliary yarn (Hilfsfaden), can also be omitted at this location. Furthermore, the material of the reinforcing elements at this location may also be different (e.g. by additional yarn density and/or by alternative materials in the warp, weft or auxiliary yarns) in order to achieve the desired effect.

According to one aspect of the invention, the weakening is a cut. It is advantageous here that a cut can be made simply and quickly in order to achieve the desired weakening of the reinforcing element. The effect achieved thereby can also be varied simply by the configuration of the incision. This can be achieved, for example, by selecting the depth of the cut.

According to another aspect of the invention, the cut is formed by about 10% to 90%, preferably by about 25% to 75%, particularly preferably by about 40% to 60% of the thickness of the reinforcing element. Weakening of the reinforcing element can be effectively achieved in these regions, wherein at the same time the reinforcing element can remain continuous in the transverse direction. In this way it can be ensured that the reinforcing element can also transmit forces in the transverse direction.

According to another aspect of the invention, the weakenings are formed substantially perpendicular to the transverse direction. This makes it possible to introduce the weakening easily and clearly.

In a further aspect according to the invention, the weakening is arranged in the transverse direction in a weakening region of the tube conveyor belt, wherein the weakening region forms a transition of an overlapping region of one belt side edge of the tube conveyor belt to the remaining tube conveyor belt. The overlap region is the region of the plane of the tubular conveyor belt in which the two belt sides overlap in the transverse direction or in the circumferential direction in the state in which the tubular conveyor belt is wound together, in order to close the tubular conveyor belt in this way. Accordingly, a weakening arranged in the manner described above has the advantage that an increased flexibility can be achieved precisely at the weakening, at which the tubular conveyor belt is to be closed, in order to enable the increased flexibility to improve the closure in a targeted manner.

The weakening is preferably spaced apart from the belt side, i.e. from the belt edge, in the transverse direction by the width of the overlap region. In this way, the belt sides can be bent over one another more easily.

According to a further aspect of the invention, the weakening is formed in pairs and in the transverse direction respectively substantially equally far apart from the belt side edges of the tubular conveyor belt. In this way, the aforementioned advantages can be achieved independently of this: which belt sides are arranged above or below when overlapping (because both belt sides have weakenings at these same locations). In addition, the flexibility can be improved by the two weakened portions, so that each weakened portion can be made less susceptible to failure and the desired effect can be achieved as a whole.

According to another aspect of the invention, the reinforcing element has a plurality of weakenings in the transverse direction. This enables the desired effect to be achieved at a plurality of positions. The individual weakening sections can also fail less frequently, so that a higher rigidity or stability of the reinforcing element in the transverse direction can be maintained or achieved, wherein at the same time the desired increased flexibility can also be achieved by the sum of the weakening sections.

According to another aspect of the invention, the reinforcing element is a transverse reinforcement, preferably made of steel or a transverse element made of a woven belt. In this way, the effect according to the invention can be used both in tubular conveyor belts with transverse reinforcements and in particular in tubular conveyor belts with transverse reinforcements of steel (for example in tubular conveyor belts with steel wires as stretching carriers) and in tubular conveyor belts with woven belts.

According to a further aspect of the invention, a plurality of reinforcing elements are arranged one above the other at the height, wherein at least two reinforcing elements have at least one weakening. In this way, other configuration possibilities can be provided, so that the effects of the invention are also applicable to tubular conveyor belts of this configuration.

According to another aspect of the invention, the weakenings of the two stiffening elements are arranged offset to each other in the transverse direction. In this way, other configuration possibilities can be provided, so that the effects of the invention are also applicable to tubular conveyor belts of this configuration.

Drawings

Two embodiments and other advantages of the present invention are described below in conjunction with the following figures. In the drawings:

fig. 1 shows a schematic front view (left) or a schematic side/cross-sectional view (right) of a known tube conveyor in a tube conveyor installation;

FIG. 2 shows a detail of the schematic cross-sectional view of FIG. 1;

FIG. 3 shows a perspective schematic view of FIG. 1;

figure 4 shows a schematic cross-sectional view through a cross-sectional area of a stiffening element weakened according to the invention;

fig. 5 shows a schematic cross-sectional view through a spread tubular conveyor belt with reinforcing elements weakened according to the invention according to a first embodiment;

FIG. 6 shows a schematic cross-sectional view through a stretched tubular conveyor belt with a reinforcing element weakened according to the invention according to a second embodiment;

FIG. 7 shows a schematic front view (left) or a schematic side/cross-sectional view (right) of a tube conveyor according to the invention in a tube conveyor installation; and

fig. 8 shows a perspective schematic view of fig. 7.

Detailed Description

Fig. 1 shows a schematic front view (left) or a schematic side/cross-sectional view (right) of a known tube conveyor 1 in a tube conveyor installation 2. Fig. 2 shows a detail of one schematic cross-sectional view of fig. 1. Fig. 3 shows a schematic perspective view of fig. 1. The tubular conveyor belt 1 or the tubular conveyor belt device 2 extends substantially in a longitudinal direction X which in principle also corresponds to the direction of movement a of the tubular conveyor belt 1 inside the tubular conveyor belt device 2. In the rolled-up state of the tubular conveyor belt 1, the longitudinal direction X corresponds to the longitudinal axis X, so that the tubular conveyor belt 1 is closed in a rolled-up, cylindrical manner about the longitudinal axis. The radial direction R is arranged perpendicular to the longitudinal direction X.

In the unfolded state (see fig. 5 and 6), the tubular conveyor belt instead extends in cartesian coordinates in the same longitudinal direction X, in a transverse direction Y (which may also be referred to as width Y) perpendicular to the longitudinal direction X and in a direction Z (which may also be referred to as height Z) perpendicular to the longitudinal direction X and the transverse direction Y.

The tubular conveyor belt 1 has a running side 13 which in the rolled-up state forms the radially outer side 13 of the tubular conveyor belt 1 and in the unrolled state forms the underside 13 of the tubular conveyor belt 1 at the height Z. On the running side 13, the tube conveyor 1 rests on bearing rollers 20, which are able to bear and guide the tube conveyor 1. The carrier rollers 20 belong to a tubular conveyor belt apparatus 2 and can be arranged, for example, as two-part 3-carrier roller seats (3-tragrolen suhle) spaced apart from one another in the longitudinal direction X, see, for example, fig. 1 and 3.

The tubular conveyor belt 1 also has a support side 11 which in the rolled-up state forms the radially inner side 11 of the tubular conveyor belt 1 and in the unrolled state forms the upper side 11 of the tubular conveyor belt 1 in the height Z. Especially in the rolled-up state, a transport object (not shown) can be transported on this carrying side 11.

For this purpose, the tube conveyor 1 can be closed between a receiving position and a discharge position of the tube conveyor device 2 (not shown) in order to hold and transport the material to be conveyed in the interior. The belt side edges 10 extending in the longitudinal direction X (which may also be referred to as belt side edges 10) are placed on top of one another in the circumferential direction as a result of the rolling up of the tubular conveyor belt 1 until the tubular conveyor belt 1 can be closed. The load-bearing side 11 of one belt side edge 10 extends beyond the running side 13 of the other belt side edge 10 by approximately a width B, which can also be referred to as an overlap region B (see, for example, fig. 2).

However, in the overlap region B, the support side 11 normally does not lie flat against the running side 13, since the restoring force of the rolled or bent belt conveyor 1 counteracts the rolling or bending. Although the tubular conveyor belt 1 can still be closed, the load-bearing side 11 of the upper belt flank 10 is spaced apart from the running surface 13 of the other belt flank 10, so that a closing angle α is formed between the load-bearing side 11 of the upper belt flank 10 and the running side 13 of the lower belt flank 10, which closing angle has a value for closing the belt flanks 10 or for placing the belt flanks 10 against one another. The smaller the closing angle α, the better the tubular conveyor belt 1 closes in the rolled-up state. If the closing angle alpha is exactly zero, the tubular conveyor 1 is ideally closed.

If the restoring force of the tubular conveyor belt 1 is strong against closure, the upper belt side 10 is very clearly spaced apart from the lower belt side 10, see fig. 1 to 3. This may lead to, among other things, an increase in the turn resistance at the carrying rollers 20, see fig. 1 and 3. Overcoming this additional turning resistance can lead to a higher drive power of the tubular conveyor apparatus 2, so that, in particular for this reason, a large closing angle α can be undesirable.

Fig. 4 shows a schematic cross-sectional view of a sectional area through a stiffening element 17 weakened according to the invention. Fig. 5 shows a schematic cross-sectional view through an unfolded tubular conveyor 1 with reinforcing elements 17 weakened according to the invention according to a first embodiment. Fig. 6 shows a schematic cross-sectional view through an unfolded tubular conveyor 1 with a reinforcing element 17 weakened according to the invention according to a second embodiment.

As is known, the tubular conveyor 1 (as well as the conveyor) can generally consist of a plurality of

layers

12, 14, 15 or

sub-layers

12, 14, 15 in the height Z. In both embodiments, the tubular conveyor 1 has a load-bearing cover plate 12, the side 11 of which pointing upwards or outwards in the height Z forms the load-bearing side 11 of the tubular conveyor 1. Opposite the carrying side 11, a reinforcing sublayer 15 adjoins the carrying-side cover 12 downwards in the height Z, and a running-side cover 14 follows the reinforcing sublayer, the side 13 of the tubular conveyor belt pointing downwards or outwards in the height Z forming the running side 13 of the tubular conveyor belt 1.

A plurality of reinforcing elements 16 in the form of tensile carriers 16 extending in the longitudinal direction X are arranged inside the reinforcing sub-layer 15. In a first embodiment of a steel wire tubular conveyor belt 1 according to fig. 5, the tensile carriers 16 are formed as steel wires 16. In the second embodiment of fig. 6, these tensile carriers 16 are formed as woven tensile carriers 16 of a woven belt body. In the first embodiment of fig. 5, the reinforcement sublayer 15 also has reinforcement elements 17 in the form of transverse reinforcements 17 made of steel extending in the transverse direction Y. In the second embodiment of fig. 6, a reinforcing element 17 is likewise provided, extending in the transverse direction Y, as an integral part of the woven belt body.

According to the invention, in both embodiments, the reinforcing element 17 extending in the transverse direction Y has at least one pair of weakened portions 18 formed as cuts 18 through the cross section of the reinforcing element 17 extending in the transverse direction Y. The cutouts 18 are each arranged in a weakened region C which forms a transition in the transverse direction Y from the respective overlap region D of each belt side edge 10 to the remaining intermediate region of the tubular conveyor belt 1.

In the first embodiment of fig. 5, even two pairs of cutouts 18 are provided here, which are arranged approximately equally far apart from the respective belt side 10 in each case. A further separate cut 18 is provided approximately in the middle in the transverse direction Y. In the second embodiment of fig. 6, two pairs of cuts 18 are likewise arranged (comparable to the first embodiment), but wherein the two pairs of cuts 18 are formed in different sub-layers of the strip.

In any case, these cutouts 18 are formed in such a way that the reinforcing element 17 extending in the transverse direction Y is severed to a certain extent relative to its thickness D in cross section (i.e. the known depth D in the height Z) in order to enable the remaining material to continue to transmit forces in the transverse direction Y, but the bendability of the reinforcing element 17 extending in the transverse direction Y is increased by this cutout 18. The restoring force of the reinforcing elements 17 extending in the transverse direction Y is thereby reduced, so that the tubular conveyor 1 can be closed or held closed more easily. Preferably, all the incisions 18 are embodied with equal depth and correspond to approximately 60% of the cross section of the reinforcing element 17 extending in the transverse direction Y, that is to say the incision depth of the incisions 18 corresponds to approximately 60% of the thickness D of the reinforcing element 17 extending in the transverse direction Y.

Fig. 7 shows a schematic front view (left) or a schematic side/cross-sectional view (right) of a tube conveyor 1 according to the invention in a tube conveyor installation 2. Fig. 8 shows a perspective schematic view of fig. 7. As can be seen schematically here, in the case of a low restoring force of the closed tubular conveyor belt 1, a better closure and thus a lower closure angle α can be achieved, which can lead to the already described advantages and can avoid or reduce the already described disadvantages. It is also true that a tube conveyor 1 which is easy to bend or is to be rolled up can also be pulled into the tube conveyor device 2 more simply and more quickly, in particular with less force. It is also possible to reduce the starting power of a new or stopped tubular conveyor 1. Furthermore, the improved flexibility of the tubular conveyor belt 1 according to the invention can lead to further configuration possibilities of the tubular conveyor belt 1 and in particular of the overlap region B.

There are many possibilities in the use of the invention with knowledge about the tubular conveyor belt 1 with reinforcing elements 17 extending in the transverse direction Y. The incision depth D of the incision 18 can thus be varied with respect to the thickness D of the reinforcing element 17. This relates to the shape of the cut-out 18, e.g. straight, inclined, from above or below in height Z, from the side in the transverse direction Y, etc. A straight cut 18 may be preferred because the straight cut 18 can be implemented to be the simplest, fastest and most reliably reproducible. In order to be able to split the cut 18 by rolling up or bending the tubular conveyor 1 and thus to function more reliably according to the invention, the cut 18 may preferably be made from below in the height Z.

Depending on the nature and in particular the flexibility of the tubular conveyor belt 1, it is possible to provide individual cutouts 18 or pairs of cutouts 18 at different locations of these reinforcing elements 17 extending in the transverse direction Y. In a plurality of reinforcing elements 17 arranged one above the other in the height Z and extending in the transverse direction Y, cutouts 18 can be provided in sub-layers of the reinforcing layer 15 both in the steel wires as transverse reinforcements 17 and in the woven transverse elements 17, which cutouts can be supplemented by non-cutout reinforcing elements 17 extending in the transverse direction Y. The incisions 18 of the different sublayers of the reinforcing layer 15 may be arranged offset to each other, above each other or in the transverse direction Y. Furthermore, all the reinforcing elements 17 extending in the transverse direction Y have a cutout 18 in the longitudinal direction X or there can also be reinforcing elements 17 extending in the transverse direction Y without cutouts in this direction.

The invention can be applied to all types of tubular conveyor belts 1, for example also to flame-retardant, swelling-resistant, acid-resistant and/or cold-resistant tubular conveyor belts 1.

Description of the reference numerals

A direction of movement of the rolled-up tubular conveyor 1

Overlap region of the B-band side edge 10

Weakened zone of the C-shaped cross member 17

d depth of cut of the transverse element 17

D thickness of the transverse element 17

R radial direction or radius of the rolled tubular conveyor belt 1

Longitudinal direction or axis of X-tube belt 1

Transverse direction or width of the Y-developed tubular drive belt 1

Vertical direction or height of the Z-extended tubular conveyor 1

Angle of closure of alpha-wound tubular conveyor belt 1

1 tubular conveyor belt

10 tape side edge, tape side edge

11 load bearing side

12 load-bearing side cover plate

13 run side

14 running-side cover plate

15 reinforcing sublayer

16 reinforcing element in longitudinal direction X, stretching the carrier

17 in the transverse direction Y, transverse element, transverse reinforcement

18 weakening or cutting of the transverse element 17

2-tube type conveyor belt equipment

20 Carrier roller

Claims

1. A tubular conveyor belt (1) having

A carrier-side cover plate, the side of the tubular conveyor belt pointing upwards or outwards in height (Z) forming the carrier side (11) of the tubular conveyor belt (1), opposite the carrier side (11), a reinforcement sub-layer (15) adjoining the carrier-side cover plate downwards in height (Z), a run-side cover plate following the reinforcement sub-layer, the side of the tubular conveyor belt pointing downwards or outwards in height (Z) forming the run side (13) of the tubular conveyor belt (1),

the reinforcing sub-layer (15) has at least one at least sectionally formed reinforcing element (17) which extends substantially in the transverse direction (Y),

it is characterized in that the preparation method is characterized in that,

the reinforcing element (17) has at least one weakening (18), wherein the weakening (18) is a cut, wherein the cut is formed by 10 to 90% of the thickness (D) of the reinforcing element (17),

wherein the weakening (18) is arranged in a weakening area (C) of the tubular conveyor belt (1) in the transverse direction (Y),

wherein the weakened region (C) forms the transition of the overlapping region (B) of one belt side edge (10) of the tubular conveyor belt (1) to the remaining tubular conveyor belt (1).

2. The tubular conveyor belt (1) according to claim 1,

wherein the cut is formed by 25% to 75% of the thickness (D) of the reinforcing element (17).

3. The tubular conveyor belt (1) according to claim 1,

wherein the cut is formed by 40% to 60% of the thickness (D) of the reinforcing element (17).

4. The tubular conveyor belt (1) according to claim 1,

wherein the weakened portion (18) is formed substantially perpendicular to the transverse direction (Y).

5. The tubular conveyor belt (1) according to claim 1,

wherein the weakening (18) is formed in pairs and in the transverse direction (Y) substantially equally far apart from the belt side edges (10) of the tubular conveyor belt (1).

6. The tubular conveyor belt (1) according to claim 1,

wherein the reinforcing element (17) has a plurality of weakenings (18) in the transverse direction (Y).

7. Tubular conveyor belt (1) according to the preceding claim 1,

wherein the reinforcing element (17) is a transverse reinforcement.

8. The tubular conveyor belt (1) according to claim 1,

wherein the reinforcing element (17) is a transverse reinforcement made of steel or a transverse element of a woven belt body.

9. The tubular conveyor belt (1) according to claim 1,

wherein a plurality of stiffening elements (17) are arranged above each other in height (Z),

wherein at least two reinforcing elements (17) have at least one weakening (18).

10. The tubular conveyor belt (1) according to claim 9,

wherein the weakening portions (18) of the two stiffening elements (17) are arranged offset to each other in the transverse direction (Y).