WO1999004188A2 - Plugging rubber-cord device for closing ducts - Google Patents

Abstract

The present invention relates to a device for closing ducts especially during their repair. The device of the present invention comprises a cylindrical sealed chamber with rubber walls. One of the end walls of the chamber comprises a duct fitting which is located in the axis of said chamber and takes the shape of an annular disc inside said chamber, wherein said disc is connected to the end wall of the chamber by an intermediate rubber layer. This device also comprises a stress-resistant frame which surrounds the cylindrical sealed chamber and is made of a thread-reinforced cord of a rubber-impregnated material. The frame comprises a cylindrical envelope which includes a protective rubber coating and to which the end walls of said frame are connected. The end walls of the frame are located against the end walls of the chamber and are made of separate radially-extending and partially-overlapping strips. The cylindrical envelope comprises end sections which are bent towards the chamber axis and which have their edges located on the end walls of said chamber. The ends of strips bent along the axis of the chamber are located on the outer surface of the cylindrical envelope.

Description

DEFAULTING ΡΕZIΗΟΚΟΡДΗΟΕ USΤΡΟйСΤΒΟ

FOR POSSIBILITY

WRITINGS

5 Area of technology

The invention concerns devices for drinking

slaughter, in particular, for the duration of the protest and maybe

find application in pipe covering devices

water pipes, no water pipes and other water pipes

0 systems.

Previous level of technology

A rubber-cord jamming device is known for

Care of water pipes (see, ΩΕ 3715645, P 16 Ι_ 55/12

1988), containing a cylindrical rubber-cord

5 shell and two vulcanized joints connected to it

end walls made of rubberized material, forming

inner chamber. One of the walls is equipped with a pipe

with a nipple for supplying compressed air. Inside the chamber

The pipe fitting passes into the annular disk, which

0 is connected to the end wall through a rubber layer. This device is inserted inside the proper

the pipe is closed and compressed gas is supplied to it,

pressure of which the cylindrical rubber-cord shell

the device increases in diameter and covers everything

5 internal section of the pipe.

The disadvantages of the specified device are:

insufficient strength of the end walls and their connection with

cylindrical shell.

The listed shortcomings do not allow use

0 in a device with high gas pressure, especially at high

the range of diameters of the tubes being closed, therefore,

The device cannot be used for covering

tubes, in which case larger problems arise

pressure.

5 Also known is a rubber-cord jamming device

for the care of drainage pipes (ΚΙ) 2037729 C1, P 16 Ι_ 55/12,

20.06.95), containing cord reinforced with threads

a cylindrical shell limited at the ends with

formation of the inner chamber by reinforced

0 end walls, one of which is equipped with a pipe

a fitting, a ^pepe , passing inside the stones into an annular disk, connected to the inner surface of the end wall

chambers through a rubber layer, and the end sections

located in the cylindrical part of the layers of threads where

bent in the radial direction and grouped into

5 strips that cover the axis of rotation of the device and

affects the peripheral walls of the device, especially the voices,

going along the wrong ends of the diameter

cylindrical part of the device, connected

directly overlapping in the area of the axis of rotation

0 devices.

This concept, thanks to the recognition

the cylindrical and end parts of the device are uniform

uncut threads of the cord, establishes a connection

specified parts of the device. However, it has

5 insufficient precision of the end walls, such as

connection of voices coming from false endings

diameter of the cylindrical part, directly overlapping

on the end wall in the area of the device's rotation axis,

leads to a significant increase in the thickness of the end

0 walls and the complexity of its design, which is practically not

ensures uniform distribution of forces between threads, especially between the threads lying closer to

the outer surface and the threads lying closer to

internal organs of the device.

In addition, in such a complex construction

5 with increasing πp as it approaches the axis of rotation

thickness and number of layers of cord threads when bending

the toe wall under the action of the drug given internally

compressed gas devices of the cord thread in the outer layers

the end walls are stretched, and the internal walls are compressed,

0 what is surprising about the large difference in thread tension

and may cause their destruction.

In addition to the above-mentioned patent

It is possible to perform a toe wall

such a form that it should have in the process

5 operation under gas pressure. Not specified

The shape of the toe wall cannot ensure equality

tension of the cord threads, because during operation

the gas pressure in the device changes from 0 to maximum

quantities that lead to a change in the shape of the wall thickness

0 end wall and unevenness in thread tension. The above mentioned shortcomings also do not allow

use of high gas pressure in the device, therefore

such a design cannot be used for

blockages of the tubes with high pressure and greater

5 ranges of pipe diameters.

Also known is a rubber-cord jamming device

for the care of drainage pipes (ΚΙΙ 2037727 C1, P 16 Ι_ 55/12,

20.06.95), containing a hermetically sealed cylindrical

a chamber with rubber walls, one of the end walls

0 which is equipped with a tube located along the camera axis

with a nipple passing inside the chamber into the annular disk,

connected to the end wall of the chamber via a rubber

layer made of thread-reinforced cord

rubberized material and ^a cylindrical wadded

5 chamber, power frame, including cylindrical

the shell and the parts connected to it located on the end

walls of stones, front walls of power cassettes,

made of separate ^radially directed and

partially heaving, one long ^hair with bent

0 along the camera axis at the ends, with the threads in stripes directed along the strips and placed on the power frame

rubber coating layer.

In addition to the named elements in the said patent

The connection of the cylindrical shell with

5 end walls of the power frame. This connection

parts of the power frame were implemented due to the fact that

The ends of the voices are bent along the axis of the device

under a cylindrical shell and are made thickened,

and, in addition, overlaps in the area of the cylindrical shell

0 reinforcing layers of the shell so that the outermost and

the inner layers of the shell and fibers are smoothly curved

adjacent layers that have a shorter length.

However, such a device cannot be used.

for blocking pipes with high pressure and range

5 diameters of overlapping pipes, as it does not allow

feed gas into it with high pressure due to

insufficient strength of the connections of the cylindrical part

power frame with end walls of the power frame.

The desire to increase the strength of the connection of parts

0 power loss due to increasing the number of layers of threads

cords in strips forming the end walls of the power 7

casing, and also in a cylindrical shell, leading to

increase in the thickness of the structure walls, to decrease

performance of the device, etc. most of

the compressed gas supplied into the pressure device will be

5 focus on increasing the diameter of the device and,

therefore, to increase the load on the cord threads.

In addition, when bending such a multi-layered and

of the musculoskeletal wall in the process

increase in the diameter of the device under pressure

0 gas threads of the cord in the outer layers of the wall are stretched, and in

internal - shrinks, which is similar to a larger one

unevenness in the tension of the threads and can cause them

destruction.

The named shortcomings do not allow use

5 device for the care of drains in large areas

range of pipe diameters and pressure in them.

Experiencing the technical essence.

The technical result of the invention is

creation of a rubber-cord jamming device for

0 overlaps of pipelines with a large range of diameters

tubes and pressure in them due to increased strength 8

devices and means for increasing the pressure of compressed gas,

supplied inside the device.

The technical result is achieved by the fact that in

rubber-cord jamming device for covering

waste water containing hemetis

a cylindrical chamber with rubber walls, one of which

The front walls are equipped with adjacent axles

chambers with a pipe fitting passing inside the chamber into

annular disk connected to the end wall of the chamber

through a rubber layer, made of reinforced

with cord threads of rubberized material and covering

hemethesized cylindrical stone of power cassette,

including a cylindrical shell and connected to it

located on the end walls of the end chamber

walls of the power frame, made of individual

radially directed and partially overlapping one

another strip with ends bent along the camera axis, and

rubber parka placed on the power frame

layer, and this cylindrical shell is made with

with end sections bent towards the camera axis, edges

These are placed on the front walls of the stones, and 9

the ends of the strips, bent along the camera axis, are located on

the outer surface of the cylindrical shell.

When implementing this invention, it may be

a rubber-cord jamming device was obtained for

5 tests of pipelines with technical results,

expressed in an increase in the strength of the device,

providing an increase in the pressure of the compressed gas,

supplied inside the device, and the flow of the tubes with

a larger range of diameters and pressure in them.

0 Further improvement provided by the invention

technical result due to pressure reduction

compressed gas required to release the device to

The working position is achieved by the fact that the reinforcing

cylindrical shell of thread parallel to

5 by themselves and placed at an angle in the region of 0° to 20°

forming a cylindrical shell, while the threads of the cord in

The voices are directed along the voices.

In addition, further improvement of technical

the result obtained when implementing the invention,

0 can be obtained by providing an increase

uniformity of yarn tension from improvement 10

connections of a cylindrical shell with end walls

power cassette, is achieved by having bent end

sections of the cylindrical shell are divided along the threads

into strips that are partially located on one

5 other.

The above additional improvement

technical result obtained during implementation

inventions - providing the possibility of increasing

the uniformity of the cord thread tension can be improved

0 the fact that between the cylindrical shell and the strips

Each side wall of the power supply cassette is

additional rubber layer.

The specified problem is solved by achieving improved

^but no result at the expense of more equal

5 positions of the voices according to the thickness of the power walls

frame in that the forming end walls of the power

As for the hairs, they are related to the problem, like the hairs

Each paw is positioned at a 90° angle to the arc and

At a simple angle to the corresponding voices of the neighboring papas.

0 In addition, the declared device increases

functional reliability due to reduction 11

the likelihood of its damage during operation during installation

dismantling operations, as well as facilitating their conduct,

due to the fact that the device is equipped with a mounted

the toe wall of the stone is positive to the tubal fitting

a bracket made with a flange, which is located

inside the chamber and through a rubber layer connected to

the toe wall of the cameo.

A short description of the drawings

The device is illustrated by drawings, where:

0 Fig. 1 shows a general view of the muffling device with

partial incision;

Fig. 2 - view of the end wall of the power frame

devices for the frame A in Fig. 1;

in Fig. 3 - node 1, shown in Fig. 1;

5 in Fig.4 - view of part of the end wall of the chamber with

with stripes placed on it along the selvedge B in Fig.3;

in Fig.5 - section C-C in Fig.3;

Fig. 6 shows the initial and working positions

muffling device in the pipe after feeding into it

0 compressed gas. 12

Rubber cord jamming device for

The care of tubular pipes contains hemetized

cylindrical chamber 1 (see Fig. 1), formed

rubber walls: cylindrical 2 and end 3 and 4.

One end wall 3 is provided with axially located

chamber, which is also the axis of the jamming device,

pipe fitting 5, which serves for feeding and releasing

from the compressed gas chamber. Inside the chamber 1 pipe fitting 5

passes into the annular disk 6, connected to the end

wall 3 through rubber layer 7.

The sealed chamber 1 is protected by force

frame 8, which is made of thread-reinforced cord

rubberized material. The power frame 8 includes

itself three parts: a cylindrical shell 9, located

on the cylindrical wall 2 chambers 1, and connected to it

located on the end walls 3 and 4 of the chamber 1,

end walls 10 and 11 of the power frame 8. End walls

10 and 11 power cassettes are similar in construction.

The end wall 10 of the power frame 8 is made of

separate radially directed and partially 13

overlapping one another stripes 12,13, 14, 15, 16 and 17 (see

Fig.2,3).

The ends of each wire are bent along the axis of the kameta 1.

Fig. 3 shows one end 18 bent along the camera axis

5 strands 12. The ends and arcs of the strands are bent in the same way.

Material-absorbing threads number 19 (see Fig.2)

directed along the voices.

A rubber parker is placed on the power frame

layer 20. External cylindrical surface of the device

0 can be provided with annular projections 21 (see Fig. 1),

which in the process of work contribute to the best

compaction and adhesion to the pipe being closed.

Important elements of the design are the connections

parts of the security forces 8, but to a significant extent

5 depend on the durability and reliability of the device.

Connection of cylindrical shell 9 with end

wall 10 of the power frame (see Fig. 3) was implemented at the expense of

Therefore, the cylindrical shell 9 is made with a bent

on the axis of the kameta 1 with the end section 22, the end section 23

0 is located on the end wall 3 of chamber 1, and the bent

along the axis of the stone 1 end 18 hairs 12 and the ends of other hairs 14

13, 14, 15, 16 and 17 are on external alert 24

cylindrical shell 9 around the entire circumference.

Part of the cylindrical shell 9, opposite

end section 22, also made with bent to the axis

5 chambers 1 end section and shell connection 9 with

front wall 11 of power cassette 8 completed

similar to its connection with the end wall 10 of the power

frame 8.

The cylindrical shell 9 is made of

0 rubberized material, which is

parallel threads of the 25-thread pressed

between them rubber 26 (see Fig. 1 and 5).

The parts are about 25 at angle α to the core

cylindrical shell, which is parallel to the axis

5 shells. Angle α varies between 0° and 20°

inclusive, be careful about 2° to 5°, and thus

cylindrical shell 9 has a significant

elasticity, which facilitates the installation of the device, and, most importantly,

the required pressure of the compressed gas decreases,

0 supplied inside the device and sharpened on 15

increase in the external diameter of the device from the original

positions of the worker in the pipe being crossed (see Fig. 6).

At an angle α greater than 20° in a compressible shell

forces arise that can "twist" the shell and

create dangerous stresses in rubber elements.

The bent end section 22 (see Fig. 3) along the entire

The circumference of the cylindrical shell 9 can be

divided along the threads of cord 25 (see Fig. 1 and 5) into strips 27

(see fig.4).

The 27 strips are located one on top of the other on the end

wall 3 chambers.

Similar to the connection and the other end section

cylindrical shell.

Between the cylindrical shell 9 (see Fig. 1, 2 and 3) and

all strips of each end wall 10 and 11 of the power

frame 8 has an additional rubber layer 28.

In Fig. 3, for example, the location of the additional

rubber layer 28 between the cylindrical shell 9 and

One line 12 front wall 10 power cassette 8.

The location of layer 28 between shell 9 and 16

other strips 13, 14, 15, 16 and 17 of the end wall 10

security force 8.

Between the shell 9 and the hairs of the toe wall 11

security cassette 8 also requires additional

rubber layer.

In the device forming end walls 10, 11

security cassette 8 voices (see Figs. 2 and 3) are located

By the way, there are every two devices adjacent to the axes

Voices, for example, 12 and 13, 14 and 15, 16 and 17 are located

angle β of one to the other. Angle β is 90°.

The angle β is chosen to ensure more

equal distribution of hair according to the thickness of the fibers

walls 10, 11 of power bank 8 and, therefore,

ensuring a more uniform tension of the threads of cord 19.

The stripes of each path are located at an angle φ κ

corresponding to the voices of neighboring papas. Like, voices

17 Paragraphs 16 and 17 (see Fig. 2) is related to

the corresponding voice is 12 points 12-13 at an angle φ. 17

Angle φ depends on the number of fibers from which

the end wall is made. The angle φ is the remaining angle and

practically does not exceed 45°.

The device can be equipped with a mounted

5 end wall 4 chambers (see Fig. 1) opposite to the tube

nipple 5 with bracket 29, made with flange 30,

which is placed inside the kameta 1 and through the rubber

Layer 31 is connected to end wall 4 of chamber 1.

Preferred execution option

0 The device is manufactured in the following manner.

First, a hermetized mixture is produced

cylindrical chamber 1 by gluing rubber

plot, especially on the plot of the walls

installation of pipe fitting 5 and, if necessary,

5 bracket 29. Then the chamber, i.e. its rubber walls 2,3, 4

(see Fig. 1) vulcanized in a press.

Further assembly of the device is also carried out in the same way

gluing of blanks.

On the blown chamber 1 (on its cylindrical wall 2)

0 apply the workpiece (in the form of a layer) cylindrical

Shell 9 and bends its end sections 22 (see Fig.3) 18

camera axes 1. Before bending, the end sections 22 can

be divided along the cord threads, i.e. between the cord threads

on strip 27 (see Fig.4).

When making a cylindrical shell 9 of

several layers, dissection of the end sections 22 and their

The bending can be performed sequentially

superposition of each layer.

On those parts of the outer surface of the 24 cylindrical

shell 9, through which shell 9 will be connected to

by the voices of the walls 10 and 11 of the power station 8, may

be imposed covering the needs of the shell 9

additional rubber layers 28.

The end walls 10 and 11 of the power frame 8 form

by applying strips 12 to the end walls 3 and 4 of the chamber,

13, 14, 15, etc. The stripes intersect the camera axis, i.e.

radially directed and partially overlap one another

another, and the ends of the 18 strips are bent along the camera axis and

connected to the cylindrical shell 9. If present,

cylindrical shell 9 additional rubber

layers 28, the connections of the strips are made with them, more precisely -

through them. 19

Bands 12, 13, 14 and others may overlap

By the way, i.e. every two adjacent voices 12 and 13 of one

the pairs are arranged with an angle between them equal to 90°.

The following pairs 14 and 15, 16 and 17 (see Fig. 2) have

5 so that the voices of each step are at an equal angle to

corresponding to the voices of neighboring papas.

After completing the installation of the security cassette 8 on it

apply a rubber covering layer and device

vulcanized in a press.

0 Operation of the rubber-cord jamming device

is carried out in the following way.

A hose is connected to the pipe fitting 5 (see Fig. 1).

(not shown in the figure) and the device is inserted into the muffled

tube 32 (see Fig. 6) through hole 33 or through hole,

5 executed in the pipe wall.

To facilitate this operation, as well as

subsequent dismantling of the device may be

connector 29 is used.

The initial position of the device 34 in Fig. 6 is conditional

0 is indicated by a point. 20

From the source of compressed gas (not shown in the figure)

the hose and tube fitting 5 are pressed into the device

gas, and the diameter of the muffling device

increases, and the length of the device decreases and the device

5 Step into the working position 35. About the working position

the muffling device completely covers the pipe and

eliminates the possibility of movement of liquid in it 36.

Industrial applicability

Thanks to the new connection design

0 cylindrical shell with end walls of the power

kakas, and the ends bent along the axis of the kameka

The voices are located on the outside

cylindrical shell, and the end sections

the cylindrical shells are bent about the axis of the frame and

5 are located on the end walls of the chamber, it became possible

distribute the load between the elements of the device,

reduce stress concentration, increase equivalence

load the threads where. The result is increased accuracy and

reliability of the device.

0 Use in a cylindrical shell of the device

only parallel threads at an angle to the cylinder axis 21

no more than 20° allows you to significantly increase elasticity

cylindrical shell and reduce the pressure value

compressed gas required to increase the external

diameter of the device.

5 This allows you to reduce the load on the thread when

arising during the expansion of the shell, and increase the useful

the load required to maintain pressure

liquids in a pasty tube.

The device's durability is also increased due to more

0 uniform distribution of threads in strips,

ensured by the exclusion of folds at the end sections

cylindrical shell, due to division into strips

the end sections of the cylindrical section bent towards the chamber axis

shells.

5 This increases the load capacity of the threads.

In addition, it increases the load balance of the threads

Where is the location of the voices on the facial walls

power cassette, which allows more equal

place the hairs along the thickness of the silo walls

0 frame. 22

All this allows you to make full use of

strength properties of the material and ultimately increase

durability and reliability of the device.

The invention allows to obtain a muffling

Rubber-shaped device for caring for teeth, range

diameters of which can be increased, and can also be

the permissible pressure in closed pipes has been increased by 20-

30%.

Claims

23 principles of invention 1. Rubber-cord jamming device for Care of tubular pipes containing hemetesized a cylindrical chamber with rubber walls, one of which 5 end walls are equipped with adjacent axles chambers with a tube fitting that passes inside the chamber into annular disk connected to the end wall of the chamber through a rubber layer, made of reinforced with cord threads of rubberized material and covering 0 hemetisized cylindrical stone, power cassette, including a cylindrical shell and connected to it located on the end walls of the chamber end walls of the power frame, made of individual radially directed and partially overlapping one 5 other strips with ends bent along the camera axis, and rubber placed on the specified power frame The main layer, about the main thing, is that The cylindrical shell is made with curved axis lumps with end sections, lumps are associated with 0 on the end walls of the chamber, and bent along the axis of the chamber 24 The ends of the voices are placed on the outside cylindrical shell. 2. Device according to item 1, characterized in that cylindrical sheath reinforcing threads parallel to each other and located at an angle of Weekly 0° to 20° around the cylindrical frame shells, and these threads are directed along the strip. 3. Device π.π.1 or 2, characterized in that 0 what are the bent end sections of the cylindrical shell dissected along the threads of the cord into strips, which are partially placed one on top of the other. 4. Device for any of items 1-3, distinguishing with the fact that between the cylindrical shell and the strips 5 each side wall of the specified power cassette An additional rubber layer is required. 5. Device for any of steps 1-4, characterized by the fact that the end grains the walls of the power cassette are filled with defects, 0 We note that the voices of each paw are located at an angle of 90° arc 25 at an arc and at an acute angle to the corresponding voices neighboring pairs. 6. Device for any of steps 1-5, distinguished by the fact that it is equipped with mounted on the end wall of the chamber opposite pipe fitting with a bracket made with a flange, which is placed inside the kameta and through the rubber the layer is connected to the end wall of the chamber.