DE102007014119A1 - Vacuum belt conveyor for transporting a material web in a material web-manufacturing machine comprises a housing divided into segments that are displaced relative to each other in the longitudinal direction to achieve a nominal total length - Google Patents

Abstract

Vacuum belt conveyor (1) comprises a frame-like housing (3) divided into at least two segments (3.1-3.3) and provided with deviating rollers (6) at each end for continuous, air-permeable transport of a transfer belt (7). At least two segments can be displaced relative to each other in the longitudinal direction so that a nominal total length (L) of the housing is achieved. Preferred Features: The segments are each made from a piece of rust-resistant sheet metal. The housing has two end segments (3.1, 3.3) at least partly encompassing a central segment (3.2).

Description

The The invention relates to a vacuum belt conveyor, which in a web-forming machine for transporting the material web is used, comprising a frame-like housing with one each at its upstream and downstream End located pulley for a circulating, air-permeable and the material web or a Einfädelstreifen bearing or transporting transfer belt.

such Belt conveyors have a solid and rigid frame-like Housing on which prefabricated in a desired length the transport or transfer belt to the construction site, d. H. to the production machine to be manufactured or converted for a material web is delivered.

Such a belt conveyor is for example from the DE-A1 10 2005 016 706 known.

vote the local conditions at the production machine in the areas where a transfer or transport the web or its Einfädelstreifens done should, with the prefabricated component "belt conveyor" or its frame-like housing do not match, is a complex new construction of the housing or other transitional solutions with resulting additional costs, time delay, etc. necessary.

It is therefore an object of the invention, a to the respective local To create conditions customizable belt conveyor.

The The object of the invention is characterized by in the characterizing part of the claim 1 mentioned features solved.

According to the invention a housing of the belt conveyor to be produced proposed, which consists of at least two individual segments and wherein the segments against each other in the longitudinal direction to each other or away from one another until a desired one Overall length of the housing of the belt conveyor is reached.

In order to is a variable-length housing created that can be prefabricated as before, but still can be adapted and installed on site. Mounting-related differences in length can thus easily and within a short time be compensated. As a result, assembly costs are reduced. additionally It is possible that the tensioning path for tensioning the transfer belt can be extended, whereby the inventive Device or the belt conveyor variable than before can be used. Advantageously, the tape or screen material ordered by the meter, where it is locally to the housing or adapted to the frame of the belt conveyor, tailored and is raised.

A expedient embodiment is that the housing consists of a middle segment and two of the Middle segment encompassing end segments exists. Is advantageous thereby, if directly at each one end of the Endsegmente one of Pulleys is mounted.

alternating can at least one more between middle segment and end segment Housing segment, be provided as an intermediate segment. In order to can the displacement or extension path be extended, whereby the belt conveyor is even more variable.

The individual segments each have a relatively easy to produce U-shaped, consisting of a base plate and two side walls existing cross section. Very functional These segments each consist of one piece by bending produce. Preferably, as a material for a stainless Suggested sheet metal.

Furthermore it is provided that in at least one deflection roller, a drive motor integrated for the circulating transfer belt is. This results in a very space-saving and clean drive solution.

In Training of the invention is also provided that for the purpose of shifting or extending or retracting the individual Segments, parallel longitudinal grooves in the base plate and in the side walls of the front segment are incorporated. In training of the housing with a middle segment and at least one end segment are the longitudinal grooves in the middle segment. At the end segments is an inward in the housing or the middle segment protruding threaded bolt, which engages in the longitudinal groove and thereby a guide guaranteed to be moved segment.

Furthermore is in each case a fixed with a screw and in the respective longitudinal groove upon displacement of the at least one Endsegmentes sliding guide piece on the Threaded bolt attached.

The individual segments can thus be easily connected and shorten the frame-like overall housing of the belt conveyor by extending or retracting retract. This is done depending on which local conditions exist and what target total length for one or more belt conveyors (yes, it can also nacheinan several belt conveyors in the machine direction be arranged) results from it.

Out Strength reasons can be additional Be arranged screw.

Around no false air between the individual housing parts, i. the segments, by the negative pressure generated under operating conditions or vacuum are between the individual segments gaskets available.

Advantageous it is, if in each case one starting from the middle segment and up to End segment reaching threaded rod is arranged. The threaded rods are arranged on each of the two outer sides of the U-profile and there each in blind holes of a welded Klotzes recorded. The desired end position is with Nuts fixable. Each threaded rod sits with one end in the log, i. stuck in the blind holes of the middle segment. In another existing and on the outside of the case welded block of at least one end segment each threaded rod is guided freely.

to Extension of travel is each end segment at one End (which is that end which is opposite to the end with the pulley) with a recess provided. This recess encloses upon displacement of the end segment towards the middle segment, the am Mid-segment attached logs.

in the The invention also provides that the upstream and downstream end segments of the housing made in a unit size whereas the middle segment is any one, different in size Lengths may have. According to the desired Total length or the nominal length of the housing the belt conveyor can be the middle segment Select locally and connect with the end segments. Also This can reduce manufacturing costs.

As a result the inventively achieved large Length variability is the tension travel for the sieve or the transfer belt larger, so that this variable than previously used.

in the The invention also includes other than the combinations described conceivable. So, as I said, intermediate elements are possible. Furthermore would be different lengths of Endsegmente conceivable.

following the invention with reference to an embodiment closer be explained.

It demonstrate:

1 : Top view of an inventive housing of a vacuum belt conveyor in perspective view;

2 : an enlarged view of a detail from 1

3 : a compressed position, so shortened form opposite to the 1 shown shape;

4 : an application example of the invention

In the figures are the same components provided with the same reference numerals.

In 1 is a housing of a vacuum belt conveyor 1 shown. The belt conveyor is used in a web-forming machine (eg in a paper machine) for transporting or transferring a material web, which in the example should be a paper or board web. This material web 2 should be transported or transferred from one machine group to the next. This will be the so-called belt conveyor 1 that stretches with its total length in the direction of the web 2 extends, uses. He has a frame-like housing 3 with one each at its upstream end 4 and downstream end 5 located pulley 6 for a revolving, air permeable and the web 2 or a Einfädelstreifen the web carrying or transporting transfer belt 7 on. The endless around the pulleys 6 circulating transfer belt and in the direction of arrow L (due to the prevailing negative pressure in the belt conveyor 1 ) moving web 2 are not in for clarity 1 but only one of their common direction suggestive dash-dot line.

The housing 3 consists in the example of three individual segments 3.1 ; 3.2 and 3.3 , which are each made in the form of U-shaped profiles. They each have a horizontal base plate 3a and two vertically aligned sidewalls each 3b on. The segments consist of a stainless sheet metal.

The segments, or rather the end segments 3.1 and 3.3 are towards each other in the direction of the middle segment 3.2 or over this partially away (for the purpose of reducing the length L) or against each other from the middle segment starting (for the purpose of extension) in the longitudinal direction so displaceable until a desired total length or nominal length L of the housing 3 of the belt conveyor 1 is reached, as shown by the double arrows DL (for length change).

Both end segments 3.1 and 3.3 surround the middle segment 3.2 ,

From the 1 shows that at one end of the end segment 3.1 as well as at the other end of the end segment 3.3 an already mentioned above pulley 6 is mounted.

The pulley 6 , at least one of them, takes in its interior an electric drive motor 8th on top of the transfer belt 7 drives, which is only indicated symbolically.

In the base plate 3a and in the side walls 3b of the middle segment 3.2 are parallel longitudinal grooves 9 incorporated. In each of these grooves engages one on the end segments 3.1 and 3.3 at an adequate height like the longitudinal grooves 9 attached threaded bolt 10 in addition, the inside of the housing 3 or the medium segment 3.2 protrudes. The threaded bolt 10 also carries a prismatic guide piece 11 which is in the longitudinal groove 9 when moving the segment 3.1 and 3.3 slides, but only in the 2 is more clearly recognizable. A fixation is done with screw connections 12 reached.

To avoid false air intake during operation of the vacuum belt conveyor 1 are between the individual segments 3.1 to 3.3 Inserted seals, which are not shown, however.

To change the length of the housing 3 of the belt conveyor 1 is one over all three segments 3.1 . 3.2 and 3.3 on the outside 13 the side walls reaching threaded rod 14 arranged. The threaded rod 14 is divided into two parts in the example 14a and 14b , Each section is each with its one end in a welded, common block 15 taken in blind holes in the longitudinal direction and with its other end in each case in another welded log 16a and 16b guided.

The desired end position, ie the desired total length or nominal length L is on both sides of the blocks 16a and 16b attached nuts 17 fixable.

The threaded rod 14a and 14b sits in each case in the block 15 of the middle segment 3.2 firmly. The threaded rod 14a is in the log 16a and the threaded rod 16b is in the log 16b guided freely and as I said with the lock nuts 17 fixable there.

More clearly, by enlarged representation of a detail from 1 , this is in 2 recognizable. It can be seen in 2 also that the end segment 3.3 (but also the end segment 3.1 , which is not visible in the neckline) in its sidewall 3b a recess 18 having. After shifting the end segment 3.3 (as well as the end segment 3.1 or even only one of the end segments) in the direction of the double arrow DL and on the other hand, surrounds the respective segment in the end position of the middle segment 3.2 attached logs 15 , whereby the travel is extended by the amount of the recess.

In 3 is the case 3 of the belt conveyor 1 shown in collapsed or compressed position, where as in 1 and 2 described, the shortest length L _{k of} the belt conveyor 1 is reached.

The upstream and downstream end segments 3.1 and 3.3 of the housing 3 are made in the same length. The middle segment 3.2 however, can be made in different lengths. On site, a prefabricated segment is then selected and installed according to the total length L to be achieved.

It should be mentioned that the case 3 instead of the three individual segments shown 3.1 ; 3.2 and 3.3 even just two segments 3.1 and 3.2 or 3.2 and 3.3 could be made. In this embodiment, although not shown, the middle segment would then simultaneously form one of the end segments and carry a deflection roller. Also conceivable would be additional intermediate segments, not shown 3n in order to increase the total length L. In the latter variant, then further guide and fastening means in the form of longitudinal grooves, threaded rods, etc. are provided.

In 4 is a possible application example of the belt conveyor according to the invention 1 according to 1 with the variable length housing 3 shown.

The 4 shows in rough schematic form a part of a web-making machine, which in the example a papermaking machine 20 should be in the page view. Shown are a last drying cylinder 21 , a dry felt 22 , a felt guide roller 23 , a paper guide roller 24 and a scraper 25 , The normal running distance of the material web 2 is denoted by X. During the threading process, the web is running 2 at a point Y down. This is a ribbon or Einfädelstreifen 2a (at arrow A) from the train 2 detached, from the cylinder 21 by means of one arranged on the web edge Randblasdüse 26 detached and immediately from the vacuum belt conveyor 1 detected. This conveyor extends over the entire free path of the web from the drying cylinder 21 to the guide roller 24 , The threading strip 2a (on narrow lanes it can be the complete train 2 be) in the example shown still to a second belt conveyor 1' with a housing 3 ' transported.

At least the first belt conveyor 1 is according to the variable-length housing according to the invention 3 educated.

1, 1'

Vacuum belt conveyor

2

train

2a

threading strip or ribbon

3, 3 '

casing

3.1

end segment

3.2

middle segment

3.3

end segment

3a

baseplate

3b

Side wall

4

upstream The End

5

downstream The End

6

idler pulley

9

longitudinal groove

10

threaded bolt

11

guide piece

12

screw

13

outside

14

threaded rod

14a, 14b

section

15 16

block

17

mother

18

recess

20

Web-forming machine, in particular paper machine

21

drying cylinders

22

dryer

23

felt roll

24

web guide

25

scraper

A

arrow

DL

double arrow

L

Target total length

L _K

shortest length

X

normal running track

Y

Point

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 102005016706 A1 [0003]

Claims (11)

Vacuum belt conveyor ( 1 ) used in a web-forming machine for transporting or transferring the material web ( 2 ), comprising a frame-like housing ( 3 ) each having a located at its upstream and downstream end pulley ( 6 ) for a circulating, air-permeable and the material web or a Einfädelstreifen carrying or transporting transfer belt ( 7 ), characterized in that the housing ( 3 ) from at least two individual segments ( 3.1 ; 3.2 ; 3.3 ; 3n ), wherein at least two segments ( 3.1 ; 3.2 ; 3.3 ) are longitudinally displaceable relative to each other until a desired total length (L) of the housing ( 3 ) of the belt conveyor ( 1 ) is reached. Vacuum belt conveyor ( 1 ) according to claim 1, characterized in that a middle segment ( 3.2 ) and two end segments at least partially encompassing the middle segment ( 3.1 ; 3.3 ) are provided, wherein at one end of the end segments ( 3.1 ; 3.3 ) each a pulley ( 6 ) is mounted. Vacuum belt conveyor ( 1 ) according to claim 1 or 2, characterized in that the segments ( 3.1 ; 3.2 ; 3.3 ; 3n ) each have a U-shaped, from a base plate ( 3a ;) and two side walls ( 3b ) have existing cross-section. Vacuum belt conveyor ( 1 ) according to claim 3, characterized in that the segments ( 3.1 ; 3.2 ; 3.3 ; 3n ) are each bent from a piece of stainless sheet metal. Vacuum belt conveyor ( 1 ) according to claim 2, characterized in that in at least one deflection roller ( 6 ) a drive motor ( 8th ) for the transfer belt ( 7 ) is integrated. Vacuum belt conveyor ( 1 ) according to at least one of claims 1 to 3, characterized in that the base plate ( 3a ) and the side walls ( 3b ) of the middle segment ( 3.2 ) parallel longitudinal grooves ( 9 ), in each of which at the end segment ( 3.1 ; 3.3 ) and placed inside the case ( 3 ) or the Mlttelsegment ( 3.2 ) projecting threaded bolts ( 10 ) to grab. Vacuum belt conveyor ( 1 ) according to claim 6, characterized in that in each case one with a screw ( 12 ) and in the respective longitudinal groove ( 9 ) sliding prismatic guide piece ( 11 ) on a threaded bolt ( 10 ) is attached. Vacuum belt conveyor ( 1 ) according to at least one of claims 1 to 7, characterized in that between the individual segments ( 3.1 ; 3.2 ; 3.3 ) Seals are arranged. Vacuum belt conveyor ( 1 ) according to at least one of claims 1 to 8, characterized in that for the change in length of the housing ( 3 ) of the belt conveyor ( 1 ) one each the segments ( 3.1 and 3.2 such as 3.2 and 3.3 ) and on both outer sides ( 13 ) of the side walls ( 3b ) with one end in a fixed block ( 16a ; 16b ) guided threaded rod or sections of the threaded rod ( 14 ; 14a . 14b ) are arranged at the middle segment ( 3.2 ) in the common block ( 15 ) and in each case in the blocks ( 16a ; 16b ) of the two end segments ( 3.1 ; 3.3 ) are guided freely, wherein the desired length (L) or end position of the housing ( 3 ) with locknuts ( 17 ) is fixable. Vacuum belt conveyor ( 1 ) according to at least one of claims 1 to 9, characterized in that each end segment ( 3.1 ; 3.3 ) at one end, which is the end with the pulley ( 6 ), per side wall ( 3b ) a recess ( 18 ), which after displacement of the end segment ( 3.1 ; 3.3 ) in the compressed end position, ie in a shortest length L _{k of} the housing ( 3 ) at the middle segment ( 3.2 ) attached logs ( 15 ) encloses. Vacuum belt conveyor ( 1 ) according to at least one of claims 1 to 10, characterized in that the upstream and the downstream end segment ( 3.1 ; 3.3 ) of the housing ( 3 ) in each case in a unit size, whereas the middle segment ( 3.2 ) can be manufactured and provided in different lengths, so that a variable nominal total length L of the housing ( 3 ) of the belt conveyor ( 1 ) is reachable.