CA1216540A - Chain conveyor - Google Patents
Chain conveyorInfo
- Publication number
- CA1216540A CA1216540A CA000440421A CA440421A CA1216540A CA 1216540 A CA1216540 A CA 1216540A CA 000440421 A CA000440421 A CA 000440421A CA 440421 A CA440421 A CA 440421A CA 1216540 A CA1216540 A CA 1216540A
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- Canada
- Prior art keywords
- conveyor
- chain
- band
- chain conveyor
- conveyor frame
- Prior art date
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Abstract
CHAIN CONVEYOR
ABSTRACT OF THE DISCLOSURE
A chain conveyor is provided which includes a chain band rotating about a conveyor frame, the chain band consists of a chain and conveyance elements connected to the chain. The chain band is guided in the upper stringer and in the lower stringer on the conveyor frame. So as to advance a scraper chain conveyor of this type along its longitudinal direction within the region of curves without the aid of separate advance drives, it is proposed that the chain band travelling in the lower stringer be pressed against the floor so that the conveyor frame is supported on the floor. So as to press the chain band on the floor, the conveyor frame is provided on both sides thereof with retractable support elements.
During retraction of these support elements the chain band comes to lie on the floor, so that when the drive is switched on, the conveyor frame is advanced on the chain band.
ABSTRACT OF THE DISCLOSURE
A chain conveyor is provided which includes a chain band rotating about a conveyor frame, the chain band consists of a chain and conveyance elements connected to the chain. The chain band is guided in the upper stringer and in the lower stringer on the conveyor frame. So as to advance a scraper chain conveyor of this type along its longitudinal direction within the region of curves without the aid of separate advance drives, it is proposed that the chain band travelling in the lower stringer be pressed against the floor so that the conveyor frame is supported on the floor. So as to press the chain band on the floor, the conveyor frame is provided on both sides thereof with retractable support elements.
During retraction of these support elements the chain band comes to lie on the floor, so that when the drive is switched on, the conveyor frame is advanced on the chain band.
Description
SPECIFICArION
The present invention relates to a chain conveyor with a chain band revolving around a conveyor frame, the chain band consisting of a chain and conveyor elements connected to the chain, the chain being guided by its upper stringer and lower strinyer on the conveyor frame.
Chain conveyors of this type are well known (see for instance DE-OS 29 26 798) and are used, for example, in mining, particularly as face conveyor in a longwall mining system for the conveying of coal. In such a situation the chain conveyor follows the excavation progress by being advanced by means of rear cylinders positioned transversely to its conveyance direction. The chain conveyor is advanced in the direction of travel only with its segment connected through a 90 arc and extending into the conveyance path.
It is also well known (see DE-OS 30 46 025) for a chain conveyor to be used as a mining roadway conveyor follo~ing the advance of said roadway by being advanced in the conveying direction, namely, along its longitudinal direction. For advancement there is provided a guide sled extending below the chain conveyor and being anchorable to the roadway, having an advance drive in the form of a rack and pinion. Such reverse drives with a support are very costly, and are not suita~ole for chain conveyors passing through curves.
It is also known (see DE-OS 12 90 108) to provide a chain conveyor, which, in a room-and-pillar mining system~
can ~ollow the extraction machine around curves. For this p~rpose, the chain conveyor is ~ormed in a curve manner, and is towed by the e~traction apparatus. In view of the large towing ~orces required, this apparently is only possible using a very short chain conveyor. Furthermore, the above mentioned patent publicatlon is devoid oE any suggestion of how the chain conveyor should be supported and guided along the curve during the towing process.
It is, therefore, an object of the present invention ko further develop the chain conveyor of the initially described type, so that it can advance along its longitudinal direction without -the aid of any separate advance driving arrangement, or towing arrangement, even if it is a very long conveyor.
Beginning with a chain conveyor of the initially described type, it is proposed by the present invention that the chain band revolving in the lower stringer be pressed against the floor in such a manner that the conveyor ~rame is supported on the ~loor through the chain band revolving in the lower stringer.
In the chain conveyor according to the present invention, the chain band disposed in the lower stringer is supported with its conveyor elements over its entire length on the floor during reverse travel, so that the conveyor frame slides forwardly in the longitudinal direction oE the chain conveyor relative to the chain band lying on the floorO ThuS, the chain conveyor is displaced by its own force by means of its drives, so that separate advance drives or towing means can be dispensed with.
The pressing of the chain band towards the Eloor can be accomplished, for example, by the guides of the chain band in the lower stringer being movable arld pressed downwardly. It is, however, co~siderably simpler if the conveyor frame is provided with lateral support elements which are adjustable in height. l~hus, the support elements can lift the conveyor frame when in their extended state so that the chain band passing in the lower stringer is carried by the conveyor frame~ By retracting the support elemen-ts the conveyor frame is lowered so that the chain band passing on the lower stringer is pressed against the floor. These support elements permit the chain band guided in -the lower stringer to be selectively lifted or to be put in contact with the floor for the purpose of advancing the chain conveyor.
So as to be able to pass the chain conveyor advancing under its own force -through curves, the conveyor frame is advantageously assembled in a known manner from individual segments, which are pivotally connected to one another in a horizontal plane.
To guide the flexible chain conveyor around curves in a horizontal plane, the chain ~and passing in the lower stringer may be pressed against a guide track disposed on the floor. Such a track consists of transportable segments rigidly connected to one another which may be either straight or curved. The guide track segments are set at the respective forward ends of the chain conveyor to the already laid track so that the respective advancing front erld of the guidance frame is guided in the correct direction.
, -3-The guide track advantageously incluc1es guide rods and/or guide recesses for the chain band and/or Eor the segments of the conveyor frame. These guide rods or guide recesses and the parts of the chain band or -the conveyor frame coacting therewith, are advantageously wedge-shaped in cross section. Thus, the front end of the chain conveyor is guided into the track even if the chain band and the frontmost segment of the conveyor frame attemp-t to deviate laterally from the track. Additionally, the fron-t segment of the guide frame can be equipped with additional guide elements, for example, in the ~orm of guide rolls, which are supported laterally on the track.
An alternate embodiment of the chain conveyor without a guide track provides, for the purpose of guiding the travel of the chain conveyor, that there are provided between two respective segments of the conveyor frame controllable positioning members. By means of these positioning ~embers the angle between two adjoining segments of the conveyor frame is adjustable in a horizontal plane and is arbitrarily fixed or set within the pivoting region. In this manner, it is possible to impart to the chain conveyor in the longitudinal direction and within its movability in the horizontal plane, any desired travel.
So as to maintain travel of the chain conveyor, once set with the aid of th~ positioning members even i~ the chain conveyor advances along its longitudinal direction, the positioning members are connected to a common remote control system. Through this control system the posltioning movements of the positioning members are interrelated in such a manner with the relative movement between the chain band and the conveyor frame during advance of the chain conveyor, that the chain conveyor moves even in the curved region along the predetermined track.
Although the conveyor frame may ~ollow any started travel oE the chain band within a longitudinal region without any positioning members, it is sufficient in certain cases if positioning members are provided in certain longitudinal regions of the chain conveyor, for instance along a length which is required for attaining a 90 arc. By this means, a large number of positioning members can be dispensed with, particularly in the case of very long chain conveyors.
In the case where control of the advancing device of the chain conveyor can be accomplished in a short and visibly controllable region, these few positioning members can be controlled manually.
Advantageously, intermediate drives are incorporated in the chain conveyor, in the longitudinal region of the conveyor frame in a manner known, whose length does not exceed two segments of the conveyor frame. Such drives are spaced a distance from one another corresponding to the smallest possible arc length of a 90 arc of the conveyor frame. By ~his formation of the intermediate drives, the horizontal guiding of the chain conveyor is nok substantially impaired even in the region of the intermediate drives. Due to the fact that the intermediate drives are disposed at very short distances from one another, relatively low tensions arise between khe individual drives in the chain band. This ~ 3 is important since large tensions arisiny in the chain band particularly in the reyion of the arcs tend to change the travel of the conveyance frame.
The present invention further provides that the drive wheel of the intermediate drive engages both the upper stringer as well as the lower stringer of the chain band.
The drive wheel also serves as a support roller for the chain band in the lower stringer. Due to this, friction forces arising during advance of the chain conveyor are reduced between the chain band and the conveyance frame in the region of the drives.
Support rollers can be associated with the lower stringer of the conveyor frame for the same purp~se. ~y means of such rollers the conveyor frame is supported on the chain band, which in turn is supported on the floor. Such support rollers for the lower stringer of the chain band are relatively simple in construction, and result in a considerable reduction of the frictional forces during advance of the conveyor frame, as only the rolling fric~ion between the chain band and the support rollers need be overcomeO
Advanta~eousl~, the members of the chain band are formed so as to be flat on that side facing the support rollers and also to overlap one another in the longitwdinal direction to such an extent that a smooth roller track is formed for the support rollers. The support rollers of the conveyor frame move easily and unhindered on this roller track since no unevenness occurs therealony.
According to a preferred embodiment of the chain conveyor of the present invention, the chain conveyor i5 implemented as a scraper chain conveyor, in which the conve~or frame is implemented in a known manner as a supply chute composed o~ chute segments and the conveyor elemen-ts of the chain band a~e implemented as scraper elements.
So as to be able to transfer the conveyed goods at the end of the conveyor chute from a chain scraper conveyor of this type advancing along the longitudinal direction, the conveyor frame, implemented as a conveyance chute, includes a lifted discharge end which is shifted in parallel and is connected to the supply chute through an S-shaped curve.
According to an alternate embodiment of the chain conveyor of the present invention, the chain conveyor is implemented as a plate-band wherein the conveyor elements are formed in a known manner by plates overlapping one another along the longitudinal direction.
The present invention will be described and understood more readily when considered together with the embodiments depicted in the acco~panying drawings in which:
FIG. 1 is a plan view of a scraper chain conveyor according to the present invention travelling in a longitudinal section of the conveyance chute, and shaped in the form of a curve;
FIG. 2 is a cross-sectional view of a first embodiment of -the scraper chain conveyor according to the present invention without a guide track;
FIG. 3 is a cross-sectional v:iew oE a second embodiment of the scraper chain conveyor accoediny to the present invention, incl~ding a gui~e track;
FIG. 4 is a plan view of the guide track;
FIG. 5 corresponds to FIG. 3 but is a cross-sectional view in the region of the frontmost chute segment, FIG. 6 is a cross-sectional view of a third embodiment of the scraper chain conveyor according to the present invention, including support rollers for the chain band;
~IG. 7 is a side view of the chain band of the scrpaer chain conveyor of FIG. 6;
FIG. 8 is a plan view of the chain band of the scraper chain conveyor of FIG. 6;
FIG. 9 is a cross-sectional view of the scraper chain conveyor of FIG. 6, in the region of the intermediate drive;
FIG. 10 is a longitudinal section of the scraper chain conveyor of FIG. 9;
FIG. ll is a plan view of the lifted discharge end of the scraper chain conveyor according to the present invention; and FIG. 12 is a cross-sectional view of the chain conveyor, according to the present invention, implemented as a plate band.
The chain conveyors, as seen in FIGS. 1-11, each include a conveyor frame composed oE respective short segments, which is implemented as a conveyor chute of a ccraper chain conveyor, which is assembled from chute segments. In the embodiment example o~ ~XGS. 1-5, the chute segments are denoted by the reference numeral 1.
The chute segments 1 are pivotally connected with one another in a horizontal plane, in such a way that the conveyor chute can travel along narrow curves having an arc radius of, for example, 4 m or less. The chute segments 1 include in the center on the upper side (upper stringer), and in the center on the lower side (lower stringer) guides 2 for a chain band 3. Chain band 3 consists of vertical chain members 3a, horizontal connecting members 3b, and scraping elements 3c serving as guide elements. Chain band 3 is freely shiftable in a known manner (See ~E-OS 29 26 798) in guides 2 of chute segments 1 along the longitudinal direction of the conveyor chute, may be telescoped, and slidable in the telescoped state. Intermediate drives 4 are provided at uniform respective distances in the supply chute and are shorter than two adjoiningly disposed chute segments 1 and can therefore be tailored to the shape of the curves of the supply chute. The distance between two intermediate drives is great enough that the chute segments 1 lying theLebetween can form a 90 arcO The intermediate drives 4 each include a wheel 4a, ~hich engages the horizontal connecting members 3b of the chain band 3 both in the upper stringer as well as in the lower stringer.
Chute segments 1 are provided on each side ~ith retractable support elements 5, which advantageously are formed as double-acting hydraulic cylin~ers. The stroke of support elements 5 is large enough that chute seyment 1 may be lifted to such an extent ~rom the floor, in the case of extension oE support elements 5, that chain band 3 is carried without making contact with the floor (see FIG. 2) by guides
The present invention relates to a chain conveyor with a chain band revolving around a conveyor frame, the chain band consisting of a chain and conveyor elements connected to the chain, the chain being guided by its upper stringer and lower strinyer on the conveyor frame.
Chain conveyors of this type are well known (see for instance DE-OS 29 26 798) and are used, for example, in mining, particularly as face conveyor in a longwall mining system for the conveying of coal. In such a situation the chain conveyor follows the excavation progress by being advanced by means of rear cylinders positioned transversely to its conveyance direction. The chain conveyor is advanced in the direction of travel only with its segment connected through a 90 arc and extending into the conveyance path.
It is also well known (see DE-OS 30 46 025) for a chain conveyor to be used as a mining roadway conveyor follo~ing the advance of said roadway by being advanced in the conveying direction, namely, along its longitudinal direction. For advancement there is provided a guide sled extending below the chain conveyor and being anchorable to the roadway, having an advance drive in the form of a rack and pinion. Such reverse drives with a support are very costly, and are not suita~ole for chain conveyors passing through curves.
It is also known (see DE-OS 12 90 108) to provide a chain conveyor, which, in a room-and-pillar mining system~
can ~ollow the extraction machine around curves. For this p~rpose, the chain conveyor is ~ormed in a curve manner, and is towed by the e~traction apparatus. In view of the large towing ~orces required, this apparently is only possible using a very short chain conveyor. Furthermore, the above mentioned patent publicatlon is devoid oE any suggestion of how the chain conveyor should be supported and guided along the curve during the towing process.
It is, therefore, an object of the present invention ko further develop the chain conveyor of the initially described type, so that it can advance along its longitudinal direction without -the aid of any separate advance driving arrangement, or towing arrangement, even if it is a very long conveyor.
Beginning with a chain conveyor of the initially described type, it is proposed by the present invention that the chain band revolving in the lower stringer be pressed against the floor in such a manner that the conveyor ~rame is supported on the ~loor through the chain band revolving in the lower stringer.
In the chain conveyor according to the present invention, the chain band disposed in the lower stringer is supported with its conveyor elements over its entire length on the floor during reverse travel, so that the conveyor frame slides forwardly in the longitudinal direction oE the chain conveyor relative to the chain band lying on the floorO ThuS, the chain conveyor is displaced by its own force by means of its drives, so that separate advance drives or towing means can be dispensed with.
The pressing of the chain band towards the Eloor can be accomplished, for example, by the guides of the chain band in the lower stringer being movable arld pressed downwardly. It is, however, co~siderably simpler if the conveyor frame is provided with lateral support elements which are adjustable in height. l~hus, the support elements can lift the conveyor frame when in their extended state so that the chain band passing in the lower stringer is carried by the conveyor frame~ By retracting the support elemen-ts the conveyor frame is lowered so that the chain band passing on the lower stringer is pressed against the floor. These support elements permit the chain band guided in -the lower stringer to be selectively lifted or to be put in contact with the floor for the purpose of advancing the chain conveyor.
So as to be able to pass the chain conveyor advancing under its own force -through curves, the conveyor frame is advantageously assembled in a known manner from individual segments, which are pivotally connected to one another in a horizontal plane.
To guide the flexible chain conveyor around curves in a horizontal plane, the chain ~and passing in the lower stringer may be pressed against a guide track disposed on the floor. Such a track consists of transportable segments rigidly connected to one another which may be either straight or curved. The guide track segments are set at the respective forward ends of the chain conveyor to the already laid track so that the respective advancing front erld of the guidance frame is guided in the correct direction.
, -3-The guide track advantageously incluc1es guide rods and/or guide recesses for the chain band and/or Eor the segments of the conveyor frame. These guide rods or guide recesses and the parts of the chain band or -the conveyor frame coacting therewith, are advantageously wedge-shaped in cross section. Thus, the front end of the chain conveyor is guided into the track even if the chain band and the frontmost segment of the conveyor frame attemp-t to deviate laterally from the track. Additionally, the fron-t segment of the guide frame can be equipped with additional guide elements, for example, in the ~orm of guide rolls, which are supported laterally on the track.
An alternate embodiment of the chain conveyor without a guide track provides, for the purpose of guiding the travel of the chain conveyor, that there are provided between two respective segments of the conveyor frame controllable positioning members. By means of these positioning ~embers the angle between two adjoining segments of the conveyor frame is adjustable in a horizontal plane and is arbitrarily fixed or set within the pivoting region. In this manner, it is possible to impart to the chain conveyor in the longitudinal direction and within its movability in the horizontal plane, any desired travel.
So as to maintain travel of the chain conveyor, once set with the aid of th~ positioning members even i~ the chain conveyor advances along its longitudinal direction, the positioning members are connected to a common remote control system. Through this control system the posltioning movements of the positioning members are interrelated in such a manner with the relative movement between the chain band and the conveyor frame during advance of the chain conveyor, that the chain conveyor moves even in the curved region along the predetermined track.
Although the conveyor frame may ~ollow any started travel oE the chain band within a longitudinal region without any positioning members, it is sufficient in certain cases if positioning members are provided in certain longitudinal regions of the chain conveyor, for instance along a length which is required for attaining a 90 arc. By this means, a large number of positioning members can be dispensed with, particularly in the case of very long chain conveyors.
In the case where control of the advancing device of the chain conveyor can be accomplished in a short and visibly controllable region, these few positioning members can be controlled manually.
Advantageously, intermediate drives are incorporated in the chain conveyor, in the longitudinal region of the conveyor frame in a manner known, whose length does not exceed two segments of the conveyor frame. Such drives are spaced a distance from one another corresponding to the smallest possible arc length of a 90 arc of the conveyor frame. By ~his formation of the intermediate drives, the horizontal guiding of the chain conveyor is nok substantially impaired even in the region of the intermediate drives. Due to the fact that the intermediate drives are disposed at very short distances from one another, relatively low tensions arise between khe individual drives in the chain band. This ~ 3 is important since large tensions arisiny in the chain band particularly in the reyion of the arcs tend to change the travel of the conveyance frame.
The present invention further provides that the drive wheel of the intermediate drive engages both the upper stringer as well as the lower stringer of the chain band.
The drive wheel also serves as a support roller for the chain band in the lower stringer. Due to this, friction forces arising during advance of the chain conveyor are reduced between the chain band and the conveyance frame in the region of the drives.
Support rollers can be associated with the lower stringer of the conveyor frame for the same purp~se. ~y means of such rollers the conveyor frame is supported on the chain band, which in turn is supported on the floor. Such support rollers for the lower stringer of the chain band are relatively simple in construction, and result in a considerable reduction of the frictional forces during advance of the conveyor frame, as only the rolling fric~ion between the chain band and the support rollers need be overcomeO
Advanta~eousl~, the members of the chain band are formed so as to be flat on that side facing the support rollers and also to overlap one another in the longitwdinal direction to such an extent that a smooth roller track is formed for the support rollers. The support rollers of the conveyor frame move easily and unhindered on this roller track since no unevenness occurs therealony.
According to a preferred embodiment of the chain conveyor of the present invention, the chain conveyor i5 implemented as a scraper chain conveyor, in which the conve~or frame is implemented in a known manner as a supply chute composed o~ chute segments and the conveyor elemen-ts of the chain band a~e implemented as scraper elements.
So as to be able to transfer the conveyed goods at the end of the conveyor chute from a chain scraper conveyor of this type advancing along the longitudinal direction, the conveyor frame, implemented as a conveyance chute, includes a lifted discharge end which is shifted in parallel and is connected to the supply chute through an S-shaped curve.
According to an alternate embodiment of the chain conveyor of the present invention, the chain conveyor is implemented as a plate-band wherein the conveyor elements are formed in a known manner by plates overlapping one another along the longitudinal direction.
The present invention will be described and understood more readily when considered together with the embodiments depicted in the acco~panying drawings in which:
FIG. 1 is a plan view of a scraper chain conveyor according to the present invention travelling in a longitudinal section of the conveyance chute, and shaped in the form of a curve;
FIG. 2 is a cross-sectional view of a first embodiment of -the scraper chain conveyor according to the present invention without a guide track;
FIG. 3 is a cross-sectional v:iew oE a second embodiment of the scraper chain conveyor accoediny to the present invention, incl~ding a gui~e track;
FIG. 4 is a plan view of the guide track;
FIG. 5 corresponds to FIG. 3 but is a cross-sectional view in the region of the frontmost chute segment, FIG. 6 is a cross-sectional view of a third embodiment of the scraper chain conveyor according to the present invention, including support rollers for the chain band;
~IG. 7 is a side view of the chain band of the scrpaer chain conveyor of FIG. 6;
FIG. 8 is a plan view of the chain band of the scraper chain conveyor of FIG. 6;
FIG. 9 is a cross-sectional view of the scraper chain conveyor of FIG. 6, in the region of the intermediate drive;
FIG. 10 is a longitudinal section of the scraper chain conveyor of FIG. 9;
FIG. ll is a plan view of the lifted discharge end of the scraper chain conveyor according to the present invention; and FIG. 12 is a cross-sectional view of the chain conveyor, according to the present invention, implemented as a plate band.
The chain conveyors, as seen in FIGS. 1-11, each include a conveyor frame composed oE respective short segments, which is implemented as a conveyor chute of a ccraper chain conveyor, which is assembled from chute segments. In the embodiment example o~ ~XGS. 1-5, the chute segments are denoted by the reference numeral 1.
The chute segments 1 are pivotally connected with one another in a horizontal plane, in such a way that the conveyor chute can travel along narrow curves having an arc radius of, for example, 4 m or less. The chute segments 1 include in the center on the upper side (upper stringer), and in the center on the lower side (lower stringer) guides 2 for a chain band 3. Chain band 3 consists of vertical chain members 3a, horizontal connecting members 3b, and scraping elements 3c serving as guide elements. Chain band 3 is freely shiftable in a known manner (See ~E-OS 29 26 798) in guides 2 of chute segments 1 along the longitudinal direction of the conveyor chute, may be telescoped, and slidable in the telescoped state. Intermediate drives 4 are provided at uniform respective distances in the supply chute and are shorter than two adjoiningly disposed chute segments 1 and can therefore be tailored to the shape of the curves of the supply chute. The distance between two intermediate drives is great enough that the chute segments 1 lying theLebetween can form a 90 arcO The intermediate drives 4 each include a wheel 4a, ~hich engages the horizontal connecting members 3b of the chain band 3 both in the upper stringer as well as in the lower stringer.
Chute segments 1 are provided on each side ~ith retractable support elements 5, which advantageously are formed as double-acting hydraulic cylin~ers. The stroke of support elements 5 is large enough that chute seyment 1 may be lifted to such an extent ~rom the floor, in the case of extension oE support elements 5, that chain band 3 is carried without making contact with the floor (see FIG. 2) by guides
2 in the lower stringer. If, however, supporting elements S
are retracted (phantom lines in FIG. 2~, chain band 3 lies on the floor, and is pressed towards the floor by the weight of the conveyor chute. If, when support elements 5 are retracted, drives 4 are switched on, the conveyance chute is shifted on the chain band 3, which is supported on the floor, along the longitudinal direction of -the scrapper chain conveyor.
Guidance of the scraper chain conveyor along its longitudinal direction during the reverse travel is accomplished in the embodiment example of FIGS. 1 and 2 by positioning cylinders 6 (see FI~. 1) disposed between adjoining chute segments. Positioning cylinders 6 engage two adjoining chute segements 1 and may arbitrarily shi~t and set the angle subtended between these chute segments 1 within the available pivoting region. Positioning members 6 are advantageously formed as short hydraulic cylinders controlled by a central control system 7 in the require~ manner. The control system operates in such a manner that during advancement of the scrapper chain conveyor, the positioning movements of the positioning members 6 are so interrelated with the relative movement of the chain band 3 and o~ the conveyance chute that the scraper chain conveyor moves snakewise along the region of the curves.
:LO -As chute segments 1, in the longltudinal region of the scraper chain conveyor fo~low the travel of the ch~in band 3 lying on, and supported by the floor, even without any positioning members 6, it is sufficient under certain circumstances to only provide the Erontmost segment of the scraper chain conveyor with posi-tioning members 6, namely, over a length which is sufficient for the formation of a 90 arc. In that case, the positioning members 6 can optionally be controlled manually.
An alternate embodiment of the scraper chain conveyor is shown in FIG. 3. This embodiment dispenses with positioning members 6, and uses in lieu thereof a rigid guide track 8 disposed below the scraper chain conveyor. Guide track 8 is composed of straight or curved segments which are easily transportable and can be firmly assembled together. Guide track 8 includes in the center thereof a guide rod 9, which engages with complementary recesses 10 in the horizontal connecting members or links 3b or in scraping elements 3c of chain band 3. Furthermore, the guide track 8 is Eormed with guide recesses 11 for support elements 5 of chute segments 1. Both guide rod 9 as well as guide recesses 10 are wedge-shaped in cross section, so that they guide the guided parts (chain bands 3 and frontmost chute segment 1) automatically in the proper direction in the event they should deviate laterally during their advancement. The segments of guidance track 8 are each set to the already displaced guide track ahead of the conveyor, so that it is possible to guide the scraper chain conveyor in an arbitrary manner by the use of straight or curved segments.
~ s seen in FIG. 5, the frontmost chute segment 1 can additionally be provided with lateral guide elements in the form of guide rolls 12, which abut guide track 8 laterally and maintain the frontmost end chute segment 1 on guide track $.
Chute segmen~ 20 shown in E~IG. 6 includes an upper floor sheet metal 21, and a lower floor sheet metal 22. Floor sheet metals 21 and 22 are connected into a box-shaped structure by means of the profiled sidewalls 23 and 24.
Upper floor sheet metal 21 and the upper segments of sidewalls 23 and 24 form a channel open thereabove through which passes the upper stringer of a rotating chain band 25 with scraping elements 26 affixed thereto. Chain band 25 consists of vertical chain members 25a and horizontal chain members 25b (see also FIGS. 7 and 8) wherein horizontal chain members 25b are provided with lateral guide cheeks, which are forcibly guided in guides 27 disposed on upper floor sheet metal 21.
The lower floor sheet metal 22, and the lower segments of the sidewalls 23 and 24 form a channel open therebelow within which is guided the lower stringer of the rotating chain band 25 with the scraping elements 26 affixed thereto.
For its guidance, lower floor sheet metal 22 ;ncludes guides 27 on its lower side, which correspond to the guides 27 on the upper side of the upper floor sheet metal.
Hydraulically adjustable support elements 28 are disposed on the lower edges of sidewalls 23 and 24. The vertical stroke path of support elements 28 is such that ~
chain band 25 does not come in contact with the floor when support elements 28 are extended and is guid~d in suspension by guides 27. When support elements 28 are retracted, however, chain band 25 lies on the floor and carries the entire chute element 20. Thus positioned, during a relative motion between chain band 25 and chute element 20 along the longitudinal direction of the conveying channel, chute element 20 and consequently the conveying channels are shifted.
In order to reduce the frictional forces arising during this displacement, there are supported on lower floor sheet metal 22 support rollers 29, which project throuyh corresponding openings in floor sheet metal 22, and support chute segment 20 and therewith the chute channel during advancement on chain band 25. Support rollers 29 are supported on a stationary axle 30, which in turn is affixed to consoles 31, which in turn are connected to the upper side of ~loor sheet metal 22.
So that support rollers 29, during their support on chain band 25, have smooth and undisturbed travelling surfaces, the chain members 25a and 25b are formed so as to be Elat on the respective sides facing support rollers 29, and overlap one another along the longitudinal direction of chain band 25 in such a manner that the through-going smooth roll tracks result for -the supporting rollers 2g (see FIGS. 7 and 8).
The intermediate drive illustrated in FIGS. 9 and 10 corresponds in its basic construction substantially to a ;"aS ~
normal chute segment having the floor sheet metals 2l and 22, the sidewalls 23 and 24, the guides 27 for chain band 25, and support elements 28. Here, however, there is supported between the floor sheet metals 21 and 22 a drive wheel 33 driven by a motor 32, which passes through openings in the floor sheet metals 21 and 22, and engages chain band 25 both in the upper stringer as well as in the lower stringer. This drive wheel 33 also includes supporting surfaces for chain band 25, when the latter lies on the floor because of the retraction of the support elements 287 These supporting surfaces serve as a support for the intermediate drive advancing along the longitudinal direction of -the scraper chain conveyor. In this manner, drive wheel 33 is simultaneously formed as a support roller for the advancement of the conveyor on chain band 25.
In FIG. 11, there is illustrated the discharge end A of a scraper chain conveyor lifted from the floor. This discharge end A extends parallel to the longitudinal region L
of the scraper chain conveyor, and is connected through an S-curve S to the longitudinal region L of the scraper chain conveyor. The discharge end A is optionally guided by means of guide elements, for example, rollers or the like (not illustrated in the drawing), on the stationary conveyor F for accepting the supply goods from the movable scraper chain conveyor.
The chain conveyor, according to FIG. 12 is Eormed as a plate band with a box-shaped conveyor frame 41 wi-th chain band 42 rotating therearound. Chain band 42 consists of a chain 43 and plates 44 affixed thereto which serve as conveyance elements. Plates 44 are supported and guided in guides 46 of the conveyor frame 41 through rollers 45 laterally attached thereto.
Laterally of the conveyor frame 41 there are disposed extendable and retractable support elements 47, which in the retracted state, as shown in F~G. 12, cause the chain band 42 to come in contact with the floor, and lif~ in their extended state conveyor frame 41 to such an extent that chain band 42 travelling in the lower stringer is carried by conveyor frame 41. Conveyor frame 41 is provided in i~s interior with additional support rollers 48, which support conveyor frame 41 during its advancement on chain band 42, which is supported on the floor by plates 44~ so that during an advancement of the conveyor frame 41, only frictional rolling resistance has to be overcome.
It is understood that the foregoing general and detailed descriptions are explanatory of the present invention and are not to be interpreted as restrictive of the scope of the following claims.
~15-
are retracted (phantom lines in FIG. 2~, chain band 3 lies on the floor, and is pressed towards the floor by the weight of the conveyor chute. If, when support elements 5 are retracted, drives 4 are switched on, the conveyance chute is shifted on the chain band 3, which is supported on the floor, along the longitudinal direction of -the scrapper chain conveyor.
Guidance of the scraper chain conveyor along its longitudinal direction during the reverse travel is accomplished in the embodiment example of FIGS. 1 and 2 by positioning cylinders 6 (see FI~. 1) disposed between adjoining chute segments. Positioning cylinders 6 engage two adjoining chute segements 1 and may arbitrarily shi~t and set the angle subtended between these chute segments 1 within the available pivoting region. Positioning members 6 are advantageously formed as short hydraulic cylinders controlled by a central control system 7 in the require~ manner. The control system operates in such a manner that during advancement of the scrapper chain conveyor, the positioning movements of the positioning members 6 are so interrelated with the relative movement of the chain band 3 and o~ the conveyance chute that the scraper chain conveyor moves snakewise along the region of the curves.
:LO -As chute segments 1, in the longltudinal region of the scraper chain conveyor fo~low the travel of the ch~in band 3 lying on, and supported by the floor, even without any positioning members 6, it is sufficient under certain circumstances to only provide the Erontmost segment of the scraper chain conveyor with posi-tioning members 6, namely, over a length which is sufficient for the formation of a 90 arc. In that case, the positioning members 6 can optionally be controlled manually.
An alternate embodiment of the scraper chain conveyor is shown in FIG. 3. This embodiment dispenses with positioning members 6, and uses in lieu thereof a rigid guide track 8 disposed below the scraper chain conveyor. Guide track 8 is composed of straight or curved segments which are easily transportable and can be firmly assembled together. Guide track 8 includes in the center thereof a guide rod 9, which engages with complementary recesses 10 in the horizontal connecting members or links 3b or in scraping elements 3c of chain band 3. Furthermore, the guide track 8 is Eormed with guide recesses 11 for support elements 5 of chute segments 1. Both guide rod 9 as well as guide recesses 10 are wedge-shaped in cross section, so that they guide the guided parts (chain bands 3 and frontmost chute segment 1) automatically in the proper direction in the event they should deviate laterally during their advancement. The segments of guidance track 8 are each set to the already displaced guide track ahead of the conveyor, so that it is possible to guide the scraper chain conveyor in an arbitrary manner by the use of straight or curved segments.
~ s seen in FIG. 5, the frontmost chute segment 1 can additionally be provided with lateral guide elements in the form of guide rolls 12, which abut guide track 8 laterally and maintain the frontmost end chute segment 1 on guide track $.
Chute segmen~ 20 shown in E~IG. 6 includes an upper floor sheet metal 21, and a lower floor sheet metal 22. Floor sheet metals 21 and 22 are connected into a box-shaped structure by means of the profiled sidewalls 23 and 24.
Upper floor sheet metal 21 and the upper segments of sidewalls 23 and 24 form a channel open thereabove through which passes the upper stringer of a rotating chain band 25 with scraping elements 26 affixed thereto. Chain band 25 consists of vertical chain members 25a and horizontal chain members 25b (see also FIGS. 7 and 8) wherein horizontal chain members 25b are provided with lateral guide cheeks, which are forcibly guided in guides 27 disposed on upper floor sheet metal 21.
The lower floor sheet metal 22, and the lower segments of the sidewalls 23 and 24 form a channel open therebelow within which is guided the lower stringer of the rotating chain band 25 with the scraping elements 26 affixed thereto.
For its guidance, lower floor sheet metal 22 ;ncludes guides 27 on its lower side, which correspond to the guides 27 on the upper side of the upper floor sheet metal.
Hydraulically adjustable support elements 28 are disposed on the lower edges of sidewalls 23 and 24. The vertical stroke path of support elements 28 is such that ~
chain band 25 does not come in contact with the floor when support elements 28 are extended and is guid~d in suspension by guides 27. When support elements 28 are retracted, however, chain band 25 lies on the floor and carries the entire chute element 20. Thus positioned, during a relative motion between chain band 25 and chute element 20 along the longitudinal direction of the conveying channel, chute element 20 and consequently the conveying channels are shifted.
In order to reduce the frictional forces arising during this displacement, there are supported on lower floor sheet metal 22 support rollers 29, which project throuyh corresponding openings in floor sheet metal 22, and support chute segment 20 and therewith the chute channel during advancement on chain band 25. Support rollers 29 are supported on a stationary axle 30, which in turn is affixed to consoles 31, which in turn are connected to the upper side of ~loor sheet metal 22.
So that support rollers 29, during their support on chain band 25, have smooth and undisturbed travelling surfaces, the chain members 25a and 25b are formed so as to be Elat on the respective sides facing support rollers 29, and overlap one another along the longitudinal direction of chain band 25 in such a manner that the through-going smooth roll tracks result for -the supporting rollers 2g (see FIGS. 7 and 8).
The intermediate drive illustrated in FIGS. 9 and 10 corresponds in its basic construction substantially to a ;"aS ~
normal chute segment having the floor sheet metals 2l and 22, the sidewalls 23 and 24, the guides 27 for chain band 25, and support elements 28. Here, however, there is supported between the floor sheet metals 21 and 22 a drive wheel 33 driven by a motor 32, which passes through openings in the floor sheet metals 21 and 22, and engages chain band 25 both in the upper stringer as well as in the lower stringer. This drive wheel 33 also includes supporting surfaces for chain band 25, when the latter lies on the floor because of the retraction of the support elements 287 These supporting surfaces serve as a support for the intermediate drive advancing along the longitudinal direction of -the scraper chain conveyor. In this manner, drive wheel 33 is simultaneously formed as a support roller for the advancement of the conveyor on chain band 25.
In FIG. 11, there is illustrated the discharge end A of a scraper chain conveyor lifted from the floor. This discharge end A extends parallel to the longitudinal region L
of the scraper chain conveyor, and is connected through an S-curve S to the longitudinal region L of the scraper chain conveyor. The discharge end A is optionally guided by means of guide elements, for example, rollers or the like (not illustrated in the drawing), on the stationary conveyor F for accepting the supply goods from the movable scraper chain conveyor.
The chain conveyor, according to FIG. 12 is Eormed as a plate band with a box-shaped conveyor frame 41 wi-th chain band 42 rotating therearound. Chain band 42 consists of a chain 43 and plates 44 affixed thereto which serve as conveyance elements. Plates 44 are supported and guided in guides 46 of the conveyor frame 41 through rollers 45 laterally attached thereto.
Laterally of the conveyor frame 41 there are disposed extendable and retractable support elements 47, which in the retracted state, as shown in F~G. 12, cause the chain band 42 to come in contact with the floor, and lif~ in their extended state conveyor frame 41 to such an extent that chain band 42 travelling in the lower stringer is carried by conveyor frame 41. Conveyor frame 41 is provided in i~s interior with additional support rollers 48, which support conveyor frame 41 during its advancement on chain band 42, which is supported on the floor by plates 44~ so that during an advancement of the conveyor frame 41, only frictional rolling resistance has to be overcome.
It is understood that the foregoing general and detailed descriptions are explanatory of the present invention and are not to be interpreted as restrictive of the scope of the following claims.
~15-
Claims (22)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A chain conveyor supported on a floor, said chain conveyor including:
a) a conveyor frame;
b) a chain band revolving around said conveyor frame with an upper and a lower stringer, said chain band consisting of a chain and conveyor elements connected to said chain; and c) means for pressing said chain band travelling in said lower stringer against said floor so that the conveyor frame is supported on said floor through the lower stringer of said chain band.
a) a conveyor frame;
b) a chain band revolving around said conveyor frame with an upper and a lower stringer, said chain band consisting of a chain and conveyor elements connected to said chain; and c) means for pressing said chain band travelling in said lower stringer against said floor so that the conveyor frame is supported on said floor through the lower stringer of said chain band.
2. The chain conveyor as defined in claim 1, wherein said conveyor frame includes height adjustable lateral support elements to selectively lift the conveyor frame so that the chain band travelling in the lower stringer is carried by the conveyor frame and lower the conveyor frame so that the chain band travelling in the lower stringer is pressed against the floor.
3. The chain conveyor as defined in claim 1, wherein said conveyor frame includes individual segments pivotally connected to one another in the horizontal plane.
4. The chain conveyor as defined in claim 3, which further includes a guide track disposed on the floor, said guide track consisting of transportable segments having straight or curved paths, which are connected with one another, said chain band travelling in the lower stringer being pressable against said guide track.
5. The chain conveyor as defined in claim 4, wherein said guide track includes a guide rod for guiding said chain band.
6. The chain conveyor as defined in claim 4, wherein said guide track includes recesses for guiding said conveyor frame.
7. The chain conveyor as defined in claim 5, wherein said guide rod and the part of said chain band coacting therewith are wedge-shaped in cross section.
8. The chain conveyor as defined in claim 6, wherein said guide recesses and said parts of said conveyor frame coacting therewith are wedge-shaped in cross section.
9. The chain conveyor as defined in claim 7, wherein the front segment of the conveyor frame is guided on the guide track by additional guide devices.
10. The chain conveyor as defined in claim 8, wherein the front segment of the conveyor frame is guided on the guide track by additional guide devices.
11. The chain conveyor as defined in claim 3, which further includes controllable positioning members being disposed between two respective segments of the conveyor frame by means of which the angle between adjoining segments of the conveyor frame is adjustable in a horizontal plane, and may be arbitrarily within the swivelling region.
12. The chain conveyor as defined in claim 11, wherein said positioning members are remotely controlled by a common system so that the positioning movements of the positioning members during advancement of the chain conveyor are so interrelated with the relative movement between the chain band and the conveyor frame that the conveyor is advanced forwardly within the region of the curves in the predetermined track.
13. The chain conveyor as defined in claim 11, wherein said positioning members are disposed primarily in the forward longitudinal region of the chain conveyor.
14. The chain conveyor as defined in claim 13, wherein said positioning members are individually manually controllable.
15. The chain conveyor as defined in claim 1, which further includes a plurality of drives incorporated in the longitudianl region of the conveyor frame, whose length does not exceed that of two segments of the conveyor frame.
16. The chain conveyor as defined in claim 15, wherein said drives are spaced from one another at a distance which corresponds to the smallest possible floor length of a 90°
arc of the conveyor frame.
arc of the conveyor frame.
17. The chain conveyor as defined in claim 15, wherein said drives include drive wheels which engage both the upper stringer and the lower stringer of the chain band, and wherein the drive wheels serve simultaneously as a support roller for the chain band in the lower stringer.
18. The chain conveyor as defined in claim 1, which further includes support rollers associated with the lower stringer of the chain band by means of which the conveyor frame is supported on the chain band which is pressed onto the floor.
19. The chain conveyor as defined in claim 18, wherein the members of said chain band are formed flat on the side facing said support rollers and are overlapping with one another in the longtudianl direction so that a smooth rolling track is formed for said support rollers.
20. The chain conveyor as defined in claim 1, wherein said chain conveyor is a scraper chain conveyor.
21. The chain conveyor as defined in claim 20, wherein the conveyor frame includes a conveyor channel and includes a lifted discharge end shifted in parallel which is connected through an S-curve to the longitudinal region of the conveyor channel.
22. The chain conveyor as defined in claim 1, wherein said chain conveyor is being formed as a plate band.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3241129.4 | 1982-11-06 | ||
| DE3241129A DE3241129C1 (en) | 1982-11-06 | 1982-11-06 | Scraper chain conveyor, especially for underground pit mining |
| DEP3325094.4 | 1983-07-12 | ||
| DE3325094 | 1983-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1216540A true CA1216540A (en) | 1987-01-13 |
Family
ID=25805592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000440421A Expired CA1216540A (en) | 1982-11-06 | 1983-11-04 | Chain conveyor |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU568514B2 (en) |
| CA (1) | CA1216540A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3909309A1 (en) * | 1989-03-21 | 1990-09-27 | Dudweiler Untertage Masch | TRAVELABLE CURVE CONVEYOR |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7812033A (en) * | 1978-01-06 | 1979-07-10 | Lockheed Missiles Space | CATERPILLAR. |
-
1983
- 1983-11-04 CA CA000440421A patent/CA1216540A/en not_active Expired
- 1983-11-04 AU AU20974/83A patent/AU568514B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU568514B2 (en) | 1988-01-07 |
| AU2097483A (en) | 1984-05-10 |
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| MKEX | Expiry | ||
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