U.S. patent application number 16/632156 was filed with the patent office on 2020-07-23 for textile-reinforced molded hose.
The applicant listed for this patent is HUBNER GMBH & CO. KG. Invention is credited to Thomas BUSCH, Lars KRUG, Andreas WIEGREFE.
Application Number | 20200232126 16/632156 |
Document ID | / |
Family ID | 62165549 |
Filed Date | 2020-07-23 |
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United States Patent
Application |
20200232126 |
Kind Code |
A1 |
WIEGREFE; Andreas ; et
al. |
July 23, 2020 |
TEXTILE-REINFORCED MOLDED HOSE
Abstract
The present invention relates to a one-part, textile-reinforced
molded hose (1) having at least one bend along its extension in a
hose longitudinal direction (4a), in particular a sealing hose for
sealing a screen with respect to a holding frame of a vibrating
screen apparatus for separating solids from a mixture of liquid and
solids, and to a method for producing the molded hose (1), a
vibrating screen apparatus and a vehicle used in public
transportation, each having such a sealing hose, and to the use of
the molded hose as such a sealing hose.
Inventors: |
WIEGREFE; Andreas; (Fulda,
DE) ; BUSCH; Thomas; (Reinhardshagen, DE) ;
KRUG; Lars; (Immenhausen, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HUBNER GMBH & CO. KG |
Kassel |
|
DE |
|
|
Family ID: |
62165549 |
Appl. No.: |
16/632156 |
Filed: |
May 7, 2018 |
PCT Filed: |
May 7, 2018 |
PCT NO: |
PCT/EP2018/061731 |
371 Date: |
January 17, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
D03D 11/02 20130101;
D03D 1/02 20130101; D10B 2505/02 20130101; F16L 11/02 20130101;
D03D 15/00 20130101; F16J 15/46 20130101; B60J 10/244 20160201;
D03D 3/02 20130101; D10B 2505/06 20130101 |
International
Class: |
D03D 3/02 20060101
D03D003/02; D03D 11/02 20060101 D03D011/02 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 19, 2017 |
DE |
10 2017 116 312.3 |
Claims
1. A one-part, textile-reinforced molded hose having at least one
bend along its extension in a hose longitudinal direction, in
particular a sealing hose for sealing a screen with respect to a
holding frame of a vibrational screen apparatus for separating
solids from a mixture of liquid and solids, in particular for
separating solids from drilling fluid, having a hose wall having a
tubular reinforcing fabric that has a polymer coating on its
external side, the hose wall surrounding a hose inner space that
extends in the hose longitudinal direction, the reinforcing fabric
comprising warp threads and weft threads, and having a fabric
channel that extends in the hose longitudinal direction through the
reinforcing fabric and that encloses the hose inner space, wherein
the fabric channel respectively has, at the bend or bends of the
molded hose, a bend adapted to the bend of the molded hose, formed
by corresponding weaving of the warp threads and weft threads with
one another.
2. The molded hose according to claim 1, wherein the warp threads
and weft threads of the reinforcing fabric are woven with one
another in such a way that the reinforcing fabric has two
one-layered fabric regions as well as a two-layered fabric region
having at least two fabric layers that are not connected to one
another, so that the fabric channel is formed in each case between
the fabric layers.
3. The molded hose according to claim 2, wherein the two fabric
layers each have warp threads and weft threads woven with one
another, the warp threads and weft threads of the first fabric
layer not being woven with the warp threads and weft threads of the
second fabric layer.
4. The molded hose according to claim 2, wherein in the one-layered
fabric regions, all the warp threads and weft threads of the
reinforcing fabric are woven with one another.
5. The molded hose according to claim 1, wherein the molded hose is
formed as a flat hose.
6. The molded hose according to claim 1, wherein the hose wall has
two hose wall upper sides situated opposite one another, preferably
in a hose height direction, and/or has two hose wall longitudinal
edges situated opposite one another, preferably in a hose
transverse direction.
7. The molded hose according to claim 2, wherein the two fabric
layers are configured so as to align with one another in a hose
height direction of the molded hose.
8. The molded hose according to one of the preceding claim 1,
wherein the polymer coating consists of a polymer matrix in which
preferably filler materials, in particular flame-retardant filler
materials, are embedded, the polymer matrix preferably being made
of an elastomer according to DIN 7724-1993-04.
9. The molded hose according to claim 2, wherein the two-layered
fabric region is situated between the two one-layered fabric
regions, in particular seen in a hose transverse direction.
10. The molded hose according to claim 6, wherein the warp threads
and weft threads of the reinforcing fabric are woven with one
another in such a way that the reinforcing fabric has two
one-layered fabric regions as well as a two-layered fabric region
having at least two fabric layers that are not connected to one
another, so that the fabric channel is formed in each case between
the fabric layers, and the two one-layered fabric regions are each
situated adjacent to one of the two hose wall longitudinal
edges.
11. The molded hose according to claim 2, wherein the two-layered
fabric region and the two one-layered fabric regions each have a
longitudinal extension parallel to the hose longitudinal
direction.
12. The molded hose according to claim 6, wherein the two polymer
coatings, seen in a hose transverse direction, extend at least over
the entire extension of the reinforcing fabric, and preferably
somewhat beyond it, so that the reinforcing fabric is completely
embedded in the two polymer coatings, and the two polymer coatings
lie directly against one another at the hose wall longitudinal
edges and adjacent thereto, and are fixedly connected to one
another.
13. The molded hose according to claim 1, wherein the molded hose
has a valve that passes through the hose wall for inflating, in
particular for bloating, the molded hose, the molded hose
preferably having at least one void volume, sealed in fluid-tight
fashion, within the hose inner space.
14. The molded hose according to claim 2, wherein the reinforcing
fabric is reinforced in the region of the transition from the
two-layered to the one-layered regions, i.e. has a higher maximum
tensile force FH according to DIN EN ISO 13934-1:2013 and/or a
higher elongation at maximum tensile force .epsilon.H according to
DIN EN ISO 13934-1:2013 and/or a higher ratio of tensile force
according to DIN EN ISO 13934-1:2013 to elongation according to DIN
EN ISO 13934-1:2013 than is the case in a non-reinforced
region.
15. The molded hose according to claim 1, wherein the molded hose
is made with an annular shape or a U shape or a star shape.
16. A method for producing a molded hose according to claim 1,
having the following method steps: a) production of a basic fabric
having at least one fabric channel that has at least one bend that
is formed by corresponding weaving of the warp threads and weft
threads with one another; b) cutting out the reinforcing fabric
from the basic fabric; and c) external coating, on both sides, of
the reinforcing fabric with a polymer coating.
17. A vibrating screen apparatus for separating solids from a
mixture of liquid and solids, in particular for separating solids
from drilling fluid, having at least one vibrationally drivable
basket having at least one screen for separating the solids, the
screen being held in a holding frame of the basket of the vibrating
screen apparatus in clamping fashion by a sealing hose, wherein the
sealing hose is a molded hose according to claim 1.
18. The vibrating screen apparatus according to claim 17, wherein
the preferably rectangular and circumferential or U-shaped holding
frame has, in cross-section, a C-profile having a lower web wall,
an upper web wall, and a center web wall situated between them, and
the screen is situated between the upper and lower web wall, the
sealing hose being situated between the screen and one of the two
web walls in such a way that the screen is clamped, or held in
clamping fashion, between the two web walls of the holding frame by
the sealing hose.
19. The vibrating screen apparatus according to claim 17, wherein
the sealing hose has a pressure of 5 to 7 bar.
20. The vibrating screen apparatus according to claim 17, wherein
the sealing hose has holding means for fixing the sealing hose on
the holding frame.
21. A vehicle used in public transportation, preferably a railway
vehicle, preferably a high-speed train, having a vehicle body
having a door opening and a door that closes the door opening, and
having a sealing hose that is situated around the door opening or
the door in order to seal the door opening against penetration of
draft air and moisture into the vehicle interior, wherein the
sealing hose is a molded hose according to claim 1.
22. Use of a molded hose according to claim 1 as a sealing hose
between two machine parts of a machine, in particular of a
vibrating screen apparatus for separating solids from a mixture of
liquid and solids, in particular for separating solids from
drilling fluid.
23. The molded hose according to claim 13, wherein the reinforcing
fabric is reinforced in the region of the valve, i.e. has a higher
maximum tensile force FH according to DIN EN ISO 13934-1:2013
and/or a higher elongation at maximum tensile force .epsilon.H
according to DIN EN ISO 13934-1:2013 and/or a higher ratio of
tensile force according to DIN EN ISO 13934-1:2013 to elongation
according to DIN EN ISO 13934-1:2013 than is the case in a
non-reinforced region.
24. A vibrating screen apparatus for separating solids from a
mixture of liquid and solids, in particular for separating solids
from drilling fluid, having at least one vibrationally drivable
basket having at least one screen for separating the solids, the
screen being held in a holding frame of the basket of the vibrating
screen apparatus in clamping fashion by a sealing hose, wherein the
sealing hose is a molded hose produced according to claim 16.
25. Use of a molded hose produced according to claim 16 as a
sealing hose between two machine parts of a machine, in particular
of a vibrating screen apparatus for separating solids from a
mixture of liquid and solids, in particular for separating solids
from drilling fluid.
Description
FIELD OF THE DISCLOSURE
[0001] The present invention relates to a textile-reinforced molded
hose, or fabric hose, in particular a sealing hose, and to a method
for producing the molded hose.
[0002] In particular, the present invention relates to a sealing
hose for sealing a screen with respect to a holding frame of a
vibrating screen apparatus for separating solids from a supplied
mixture of liquid and solids, in particular for separating solids
from drilling fluid, and to such a vibrating screen apparatus.
[0003] In addition, the present invention relates to a sealing hose
for sealing a door gap of a door opening of a vehicle used in
public transportation, in particular of a high-speed train, and to
such a vehicle having such a sealing hose.
BACKGROUND OF THE DISCLOSURE
[0004] A hose is a flexible, elongated hollow body, frequently
having a round cross-section.
[0005] A sealing hose, which however is not a molded hose, for
sealing a door gap of a door opening in a vehicle used in public
transportation, in particular in a high-speed train, is known for
example from EP 2 810 804 A1. The sealing hose has a hose wall that
has a reinforcing support that has an elastomer coating on one side
or on both sides. The reinforcing support can be a fabric. In
addition, the reinforcing support has a lower elasticity in the
longitudinal direction of the sealing hose than in the transverse
direction. For this purpose, the reinforcing element has for
example a multiplicity of openings extending in the longitudinal
direction of the sealing hose. The sealing profile is produced for
example by extrusion.
[0006] The sealing hose of EP 2 810 804 A1 has proven effective.
However, it is disadvantageous that, during installation in a door
opening, the sealing hose is curved at the corners and in this way
is compressed. Alternatively, the door sealing is made up of a
plurality of sealing hoses that are connected to one another in the
corner regions, which is complicated and expensive.
[0007] In addition, so-called molded hoses are known. Molded hoses
are dimensionally stable hoses having predetermined dimensions,
shapes, and bends adapted to the particular intended use. A molded
hose thus has, in its unloaded initial state, or in the absence of
the action of external forces, at least one shaped, or preshaped,
or dimensionally stable bend or curvature along its hose
longitudinal direction. The molded hose is thus dimensionally
stable in its unloaded initial state.
[0008] The known molded hoses are generally produced by
vulcanization, in which a raw hose, made of raw rubber, together
with the desired hose-shaped reinforcing fabric (also called a
"stocking") is wound onto a mandrel, and then vulcanized.
Subsequently, the mandrel is removed. This method is complicated
and expensive, as well as very inflexible, because a specific
mandrel has to be manufactured for each shape.
[0009] In addition, the use of inflatable sealing hoses in
vibrating screen apparatuses is known for the separation of solids
from a supplied mixture of liquid and solids, in particular for
separating solids from drilling fluid. Such vibrating screen
apparatuses or machines (see e.g. US 2010/0089652 A1) are also
called shale shakers or shaking screen apparatuses or machines, or
riddle apparatuses or machines. They are an important component of
a drilling installation. They are used to separate coarser solids
from the drilling fluid with the aid of a vibrating basket that has
a plurality of screens. The screens can be configured in series or
in parallel. For the separation, the drilling fluid flows onto the
screens. The liquid phase and the smaller solids of the drilling
fluid flow through the screen and, if applicable, remain in the
circuit of the drilling fluid, while coarser solids (e.g. rocks)
are screened out and removed.
[0010] Generally, the screens are held by clamping in a holding
frame of the basket, with the aid of sealing hoses. The sealing
hoses consequently have both a sealing function and a clamping
function. In order to meet the mechanical demands (vibrations), as
well as the requirement of exchangeability, these sealing hoses are
realized as inflatable sealing hoses. The required pressure is
generally 6 bar.
SUMMARY
[0011] The object of the present invention is to provide a
textile-reinforced molded hose, or fabric hose, in particular a
sealing hose, for sealing a screen with respect to a holding frame
of a vibrating screen apparatus for separating solids from a
supplied mixture of liquid and solids, in particular for separating
solids from drilling fluid, in which the above-named disadvantages
are avoided. In particular, the run and the shape of the bends of
the molded hose are to be realizable freely and flexibly, wherein
the molded hose shall be producible easily and at low cost. In
addition, a method is to be provided for producing the molded
hose.
[0012] A further object of the present invention is the provision
of a vibrating screen apparatus for separating solids from a
supplied mixture of liquid and solids, in particular for separating
solids from drilling fluid, having such a sealing hose.
[0013] A further object of the present invention is the provision
of a vehicle used in public transportation, in particular a
high-speed train, having such a sealing hose.
[0014] These objects are achieved by a molded hose, in particular a
sealing hose, having the features of claim 1, and by a vibrating
screen apparatus having the features of claim 17, a vehicle used in
public transportation having the features of claim 21, and a method
having the features of claim 16. Advantageous developments of the
present invention are characterized in the respectively dependent
subclaims.
[0015] In the following, the present invention is explained in more
detail on the basis of a drawing.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 shows a highly simplified and schematic
cross-sectional-like view of a molded hose according to the present
invention;
[0017] FIG. 2 shows a schematic top view of a reinforcing fabric of
the molded hose according to the present invention;
[0018] FIG. 3 shows a schematic top view of a molded hose according
to the present invention;
[0019] FIG. 4 shows a schematic top view of a basic fabric for
producing the reinforcing fabric;
[0020] FIG. 5 schematically shows a side view of a vehicle used in
public transportation;
[0021] FIG. 6 shows a schematic and highly simplified cross-section
through a holding frame of a vibrating screen apparatus according
to the present invention, having a screen and a sealing hose
according to the present invention.
DETAILED DESCRIPTION
[0022] Molded hose 1 (FIGS. 1-3) according to the present invention
has a hose wall 2 that limits or encloses a hose inner space or
hose channel 3.
[0023] In addition, molded hose 1 is preferably realized as a flat
hose. In its initial state in which it is not being used, or is not
installed and not inflated, a flat hose is flat, or planar, or
realized as a sheet material. Thereby, hose wall 2 can completely
lie together. By filling hose inner space 3 with air or some other
fluid, the flat hose is inflated, in particular bloated.
[0024] Molded hose 1 has, in addition, a hose longitudinal
direction 4a and a hose transverse direction 4b oriented
perpendicular thereto, as well as a hose height direction 4c
oriented perpendicular to hose longitudinal direction 4a and to
hose transverse direction 4b. Hose inner space 3 passes or extends
through molded hose 1 in hose longitudinal direction 4a.
Preferably, moreover, hose longitudinal direction 4a and hose
transverse direction 4b form a first and second surface direction
of flat molded hose 1.
[0025] Moreover, molded hose 1 according to the present invention
has at least one bend or curved region 5 (FIGS. 3, 7), seen along
its extension in hose longitudinal direction 4a. The curve axis of
bend 5 is perpendicular to hose longitudinal direction 4a and
preferably parallel to hose height direction 4c. In the context of
the present invention, a bend refers to any region of the molded
hose in which it deviates from a rectilinear shape. The bend can be
for example round, or can also be cornered.
[0026] Hose wall 2 has two hose wall upper sides or hose wall broad
sides 6a;b, that are situated opposite one another, preferably in
hose height direction 4c, as well as two hose wall longitudinal
edges 7a;b situated opposite one another, preferably in hose
transverse direction 4b.
[0027] Hose wall 2 (FIG. 1) in addition has, according to the
present invention, a hose-shaped reinforcing fabric 8 that has an
outer or external polymer coating 9 on both sides. The polymer
coatings 9 each form one of the two hose wall upper sides 6a;b of
molded hose 1.
[0028] Reinforcing fabric 8 has, in a known manner, a warp
direction 10 and a weft direction 11 perpendicular thereto. In
addition, reinforcing fabric 8 has warp threads 12a;b that extend
in warp direction 10 and has weft threads 13a;b that cross warp
threads 12a;b and extend parallel to weft direction 11. In
addition, reinforcing fabric 8 has a first and a second fabric
upper side 14a;b.
[0029] Warp threads and weft threads 12a;b; 13a;b are, in each
case, monofilament threads or multi-filament threads. Monofilament
threads are each made up of a single monofilament. Multi-filament
threads are made up of a plurality of monofilaments. The
monofilaments can each be realized in one piece (monolithically),
or can have a core/cladding structure. In this context, a
multifilament thread can have different monofilaments, e.g. made of
different materials.
[0030] Polymer coating 9 consists of a polymer matrix in which
filler materials, in particular flame-retardant filler materials,
are preferably embedded. The polymer matrix is made in particular
of a polymer material or polymer in accordance with DIN
7724-1993-04. Preferably, the polymer matrix is made of an
elastomer in accordance with DIN 7724-1993-04. According to these,
elastomers are dimensionally rigid but elastically deformable
polymers whose glass transition point is below the temperature of
use. The elastomers can deform elastically under tensile and
compression stress, but subsequently return to their original,
undeformed shape. The polymer matrix is preferably made up of
vulcanized caoutchouc (rubber), in particular vulcanized silicon
caoutchouc (silicon rubber) or vulcanized natural caoutchouc
(natural rubber), or of CSM (chlorosulfonated polyethylene) or EPDM
(ethylene-propylene-diene rubber) or EVA (ethylene vinyl acetate)
or PVC (polyvinyl chloride) or PU (polyurethane), or mixtures
thereof.
[0031] As already explained, reinforcing fabric 8 is realized in
the form of a hose. Thus, it has a fabric channel, or fabric
passage, or fabric inner space 16 that extends through reinforcing
fabric 8, parallel to hose longitudinal direction 4a. Fabric
channel 16 thus forms hose inner space 3, or encloses it.
[0032] According to the present invention, fabric channel 16 is
produced by corresponding binding, or corresponding weaving, of the
warp threads and/or weft threads 12a;b; 13a;b with one another.
[0033] According to a preferred specific embodiment of the present
invention (FIGS. 1 and 2), reinforcing fabric 8 has first and
second warp threads 12a;b and first and second weft threads 13a;b.
First and second warp threads 12a;b are arranged in alternating
fashion in weft direction 11. And first and second weft threads
13a;b are arranged in alternating fashion in warp direction 10. In
addition, reinforcing fabric 8 has a plurality of first and second
weft thread pairs 17a;b also arranged in alternating fashion in
warp direction 10. Each weft thread pair 17a;b has a first and
second weft thread 13a;b.
[0034] Reinforcing fabric 8 has, according to the present
invention, a two-layered fabric region 18 that forms fabric channel
16, and two one-layered, channel-free fabric regions 19.
Two-layered fabric region 18, or fabric channel 16, is situated
between the two one-layered fabric regions 19, in particular seen
in hose transverse direction 4b. And the two one-layered fabric
regions 19 are each situated adjacent to one of the two hose wall
longitudinal edges 7a;b.
[0035] The two-layered fabric region 18, forming fabric channel 16,
and the two one-layered, channel-free fabric regions 19 each have a
longitudinal extension that runs parallel to hose longitudinal axis
4a.
[0036] Preferably, reinforcing fabric 8 has a plain weave both in
the two one-layered fabric regions 19 and in the two-layered fabric
region 18.
[0037] That is, in the two one-layered fabric regions 19, the first
and also the second weft threads 13a;13b are each woven together
with the first and second warp threads 12a;b; i.e. with all warp
threads 12a;12b.
[0038] In contrast, in the region of fabric channel 16, or in the
two-layered fabric region 18, the first and second weft thread
pairs 17a;b are divided as follows:
[0039] First weft thread pairs 17a are bound only to first warp
threads 12a, and second weft thread pairs 17b are bound only to
second warp threads 12b. That is, first weft thread pairs 17a are
woven only with first warp threads 12a, and second weft thread
pairs 17b are woven only with second warp threads 12b. First weft
thread pairs 17a and first warp threads 12a are likewise preferably
bound in a plain weave. The same holds for second weft thread pairs
17b and second warp threads 12b. First and second weft thread pairs
17a;b are thus each woven only with each second warp thread
12a;b.
[0040] In this way, the first weft thread pairs 17a form, together
with first warp threads 12a, a first, in particular upper, fabric
layer 15a, and second weft thread pairs 15b form, together with
second warp threads 12b, a second, in particular lower, fabric
layer 15b. The two fabric layers 15a;b are not connected to one
another, so that the fabric channel 16 according to the present
invention is formed between the two fabric layers 15a;b. In
addition, the fabric layers 15a;b are situated adjacent to one
another, or aligned with one another, in hose height direction
4c.
[0041] As already explained, fabric channel 16 is produced directly
during weaving, through corresponding controlled lifting or
lowering of the individual warp threads 12 a;b. As a result, the
course and the shape of fabric channel 16 are at will and can be
selected freely. In addition, according to the present invention it
is enabled that fabric channel 16 can extend not only parallel to
warp direction 10 through reinforcing fabric 8, but can also extend
obliquely thereto or perpendicular thereto, i.e. parallel to weft
direction 11. Fabric channel 16 can also run in a curved or arc
shape. In addition, the width of fabric channel 16 can be
different, or can be varied, over its length.
[0042] Thus, according to the present invention a fabric channel 16
can be produced that has at least one bend 26 that is formed by
corresponding weaving of the warp and weft threads 12a;b; 13a;b
with one another. The bends 26 of fabric channel 16 correspond to
bends 5 of molded hose 1. That is, reinforcing fabric 8 has, at the
bends 5 of molded hose 1, a respective bend 26 corresponding to
bend 5 of molded hose 1, or a bend 26 matched to the bend 5 of
molded hose 1, formed by corresponding weaving of warp and weft
threads 12a;b; 13a;b with one another.
[0043] Thus, in order to produce molded hose 1 according to the
present invention, first a basic fabric 20 is produced that has at
least one fabric channel 16 having at least one bend 26, formed by
corresponding weaving of the warp and weft threads 12a;b; 13a;b
with one another (FIG. 4). Subsequently, hose-shaped reinforcing
fabric 8 is cut out from basic fabric 20. For this purpose, cuts
are made at both sides along fabric channel 16 and at a distance
from fabric channel 16.
[0044] Subsequently, the cut-out hose-shaped reinforcing fabric 8
is coated on both sides, i.e. on its two fabric upper sides 14a;b,
with polymer coating 9. Here, the coating preferably takes place in
a known manner, preferably by brushing on, calendaring, extrusion,
compression molding, injection molding, or an immersion method.
[0045] The two polymer coatings 9 are applied in such a way that,
seen in hose transverse direction 4b, they extend at least over the
entire extension of reinforcing fabric 8, and preferably somewhat
beyond it, so that reinforcing fabric 8 is completely embedded into
the two polymer coatings 9, and the two polymer coatings 9 lie
directly against one another at hose wall longitudinal edges 7a;b
and adjacent thereto, and are fixedly connected to one another,
preferably by vulcanization.
[0046] If desired, after the coating, or during it, a valve 21 can
in addition be attached (FIG. 1). Valve 21 passes through hose wall
2 and is used to inflate, in particular to bloat, molded hose 1. In
the case of a sealing hose, this hose is preferably filled with
air, i.e. is bloated. Depending on the intended use, molded hose 1
can for this purpose also be closed at both of its hose ends 1a
(FIG. 3) in order to form a void volume, sealed in fluid-tight
fashion, within hose inner space 3.
[0047] In addition, molded hose 1 can also be made with an annular
shape, or can have more than two ends, in particular closed ends,
and can be realized in particular in a star shape or a U shape. For
example, the molded hose can also be realized as a star
sealing.
[0048] Moreover, it is within the scope of the present invention
that reinforcing fabric 8 has surface regions that differ from one
another in at least one mechanical property, according to DE 10
2017 102 626, whose full content is hereby incorporated by
reference.
[0049] For example, reinforcing fabric 8 can be reinforced in the
region of valve 21 or in the region of the transition from the
two-layered regions to the one-layered regions 18; 19, i.e. can
have a higher maximum tensile force F.sub.H according to DIN EN ISO
13934-1:2013 and/or a higher elongation at maximum tensile force
.epsilon..sub.H according to DIN EN ISO 13934-1:2013 and/or a
higher ratio of tensile force according to DIN EN ISO 13934-1:2013
to elongation according to DIN EN ISO 13934-1:2013. This can be
achieved for example by additional threads and/or a different
binding and/or a different thread material, as described in DE 10
2017 102 626.
[0050] As explained above, molded hose 1 according to the present
invention is preferably used as a sealing hose for a vehicle 22
used in public transportation (FIG. 5). Vehicle 22 is preferably a
railway vehicle, preferably a high-speed train. Vehicle 22 has, in
a known manner, a vehicle body 23 having a door opening 24 and a
door 25 that closes door opening 24. Door 25 can for example be
realized as a hinged sliding door or as a swinging door. The
sealing hose is disposed around door opening 24 or door 25 in a
known manner. In the closed state of the door during driving
operation, the sealing hose is put under pressure, so that a seal
results between vehicle body 23 and door 25. In this way, door
opening 24 is sealed against the penetration of draft air and
moisture into the vehicle interior.
[0051] As explained above, molded hose 1 according to the present
invention is particularly preferably used as a sealing hose 27 in a
vibrating screen apparatus for separating solids from a mixture of
liquid and solids, in particular for separating solids from
drilling fluid. The vibrating apparatus has, in a known manner, a
vibrating basket, or a basket that can be driven to vibration,
having at least one, preferably a plurality of, screens 28 (FIG.
6). The basket stands in vibrationally drivable connection with
drive means of the vibrating apparatus. Screens 28 can be
configured in parallel or one over the other, and are used for the
separation of the solids. Each screen 28 is in addition held in
clamped fashion in a holding frame 29 of the basket of the
vibrating screen apparatus by at least one sealing hose 27
according to the present invention. For this purpose, sealing hose
27 is preferably made annular in shape.
[0052] The preferably rectangular, circumferential or annular
holding frame 29 preferably has, in cross-section, a C-profile
having a lower web wall 29a, an upper web wall 29b, and a center
web wall 29c situated between these. Screen 28 is situated, in its
outer edge region, between the upper and lower web wall 29a;b, and
in particular lies on lower web wall 29a with a screen lower side
28a.
[0053] Sealing hose 27 according to the present invention is
situated in a known manner between upper web wall 29b and a screen
upper side 28b of screen 28. Preferably, sealing hose 27 in
addition has nubs 30 that protrude from hose wall 2 externally, in
particular upward, and that engage in corresponding openings in
upper web wall 29b. Nubs 30 are thus used to fix sealing hose 27 on
holding frame 29. Instead of nubs 30, of course, other holding
means may also be present.
[0054] Nubs 30 are preferably part of the polymer coating 9
described above, and are applied directly during the coating
process. However, they can also advantageously be vulcanized on or
glued on subsequently.
[0055] After installation, sealing hose 27 is preferably bloated,
so that screen 28 is clamped, or held by clamping, between the two
web walls 29a;b of holding frame 29 by sealing hose 27. Preferably,
sealing hose 27 has a pressure of 5 to 7 bar, in order to ensure
the clamping even given the vibrational load that occurs during
operation of the vibrating screen machine.
[0056] In addition, molded hose 1 according to the present
invention can particularly advantageously be used quite generally
as a sealing hose between machine parts of a machine, in particular
of the vibrating screen apparatus. In particular, the sealing hose
can be used for the clamping holding of a deflecting plate of the
vibrating screen apparatus in a holding frame.
[0057] An advantage of the present invention is that molded hose 1
can be produced very easily and at low cost. In addition, the shape
of molded hose 1, in particular its course and the number of bends
5, can be easily and flexibly adapted without requiring a new
shaping tool each time. Because molded hose 1 is made in one part,
a complex piecing on is not required.
[0058] Sealing hoses must be replaced frequently. For this purpose,
the exchange should be made as easy as possible. By letting the
pressure out from the sealing hose, the clamp hold is released, and
the screen can be removed.
[0059] In addition, due to the preshaped bends 5, the problem of
material compression in corners or curves does not arise. In
particular, it can be ensured that the cross-section of the hose
inner space 3 also remains the same in the bends.
[0060] In the context of the present invention, it has turned out,
surprisingly, that despite the two-layered fabric region 18, it is
possible to coat the reinforcing fabric 8 with the polymer coating
9 without the polymer substantially penetrating into fabric channel
16. This is surprising in particular because the two fabric layers
15a;b are less dense, in particular only half as dense, as the
one-layered fabric regions 19. This is because the two fabric
layers 15a;b necessarily have less material than, in particular
only half as much material as, the one-layered fabric regions 19.
In the depicted exemplary embodiment, the two fabric layers 15a;b
each have only half as many warp and weft threads 12a;b; 13a;b as
the one-layered fabric regions 19. The weft thread density and the
warp thread density of the two fabric layers 15a;b (in threads per
centimeter) according to DIN EN 1049-2:1994-02 is correspondingly
half as large as the weft thread density and the warp thread
density of the one-layered fabric regions 19.
[0061] Nonetheless, it has turned out, surprisingly, that it is
possible to coat reinforcing fabric 8 in such a way that polymer
coating 9 has an adequate adhesion to reinforcing fabric 8, but
does not penetrate into fabric channel 16, or at least does not do
so to any great extent. Fabric upper side 14a and fabric lower side
14b are thus adequately dense for polymer coating 9 even in the
region of fabric layers 15a;b, or of fabric channel 16. That is,
fabric upper side 14a and fabric lower side 14b form a
substantially closed surface even in the region of fabric layers
15a;b. That is, warp and weft threads 12a;b; 13a;b also lie against
one another in the region of fabric layers 15a;b, no open meshes
are formed (in contrast to the highly simplified drawings in FIGS.
1 and 2).
[0062] Of course, the design of fabric channel 16 can also be
realized according to the present invention by other types of
binding and weaving techniques than those described on the basis of
the exemplary embodiment. According to the present invention, the
warp threads and weft threads 12a;b; 13a;b only have to be woven
with one another in such a way that the one-layered, channel-free
fabric regions 19 and the two-layered fabric regions 18 having the
two one-layered fabric layers 15a; 15b not connected to one another
are formed from the same warp threads and weft threads 12a;b; 13a;b
or from the same thread material.
[0063] In principle, this can be realized in a different way, in
that a first part of the weft threads 13a;b is woven only with a
first part of warp threads 12a;b, and a second part of weft threads
13a;b is woven only with a second part of warp threads 12a;b. That
is, the warp threads and weft threads 12a;b; 13a;b of first fabric
layer 15a are not woven with the warp threads and weft threads
12a;b; 13a;b of second fabric layer 15b.
[0064] For example, the weft threads of the one-layered fabric
regions in the two-layered fabric regions can also be divided into
two weft threads, in particular equally thick ones. Here, the
divided and undivided weft threads can for example each be made up
of many monofilaments, or the undivided weft threads can be made up
of two monofilaments and the divided weft threads can be made up of
one monofilament. A first divided-off weft thread, or a first weft
thread half, is here woven with the first warp threads, and the
second divided-off weft thread, or the second weft thread half, is
woven with the second warp threads. In this case, the warp thread
density of the fabric layers is likewise half as large as the warp
thread density of the one-layered fabric regions. The weft thread
density is however the same, even if the weft threads are
thinner.
[0065] Thus, in each of the described cases the warp thread density
of fabric layers 15a;b is lower than the warp thread density of the
one-layered fabric regions 19.
[0066] In addition, it is within the scope of the present invention
that the molded hose has additional, in particular flat, textile
reinforcing elements. The hose wall can also be realized having
multiple layers, and can have a plurality of polymer coatings
arranged one over the other. Adhesive layers may also be present.
In addition, the reinforcing fabric can in addition be coated with
a polymer on its inner side.
[0067] In addition, of course, a plurality of one-piece molded
hoses 1 according to the present invention can also be connected to
one another to form a multi-part molded hose.
* * * * *