CA1037989A - Flexible pipe connector - Google Patents
Flexible pipe connectorInfo
- Publication number
- CA1037989A CA1037989A CA262,452A CA262452A CA1037989A CA 1037989 A CA1037989 A CA 1037989A CA 262452 A CA262452 A CA 262452A CA 1037989 A CA1037989 A CA 1037989A
- Authority
- CA
- Canada
- Prior art keywords
- rubber
- cylindrical body
- pipes
- elastic cylindrical
- pipe connector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/10—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations
- F16L27/1021—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations comprising an intermediate resilient element, e.g. a ring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
Abstract of the Disclosure A flexible pipe connector especially suitable for use in those regions of pipe lines which are burried in the ground that tends to occur discrepancies in alignment of the pipe lines. The flexible pipe connector comprises a rubber-like elastic cylindrical body, at least two flat rings spaced apart from each other in parallel and embedded in the rubber-like elastic cylindrical body, and fastening means for fastening those flat rings which are arranged at the opposite ends of the rubber-like elastic cylindrical body to pipes to be interconnected. The rubber-like elastic cylindrical body is provided around outer peripheral surface thereof with an outer circumferential groove formed between two adjacent flat rings and arcuate in section.
Description
~o~37 9 ~ 9 Tllis invention relates to a flexible pipe connector for pipe lines burried in the ground and especially suitable for use in those regions of the pipe lines which are burried in the ground surrounding building construction and tending to occur discrepancies in alignment of the pipe lines.
Heretofore, it has been the common practice to connect the opposite end flanges of pipes to be interconnected with each o~cher by means of flexible pipe connectors each inserted 'oetween two adjacent pipes to be interconnected.
However, when the ground becomes unevenly dipped, -for example, that tends to locally displace the pipes to be interconnected and induce discrepancies in alignment, provision must be made of a number of short pipe connectors so as to absorb and compensate for such amount of displacement mainly con-sisting of the amount of dip of the ground.
An object of the invention, therefore, is to provide a flexible pipe connector which makes use of de-formable property of a rubber-like elastic body and partic-ularly, utilizes shearing property thereof that tends to readily deform it, which can absorb considerably large amount ~ ~
of displacement of pipes to be interconnected with a short ~-pipe connector subjected to light load, and which can `
alleviate the load subjected from both ends of the pipe connector to pipes to be interconnected whereby the pipe line can be protected.
Another object of the invention is to provide a flexible pipe connector which comprises yokes secured to `~
opposed pipes to be interconnected, free ends of the yokes being slidably overlapped with each other and provided with ~
crossed elongate holes adapted to be guided by a pin, and -. .. . . . . - , . :
. . .
~37 9~9 which can permit pipes to be interconnected to displace in directions such that discrepancies in alignment thereof are compensatsd.
A further object of the invention is to provide a flexible pipe connector which can detachably be secured to pipes to be interconnected without necessitating any displace-ment thereof.
A feature of the invention is the provision of a flexible pipe connector comprising a rubber-like elastic cylindrical body, at least two flat rings spaced apart from each other in parallel and embedded in the rubber-like cylindrical body, and fastening means for fastening those flat rings which are arranged at the opposite ends of the rubber-like elastic cylindrical body to pipes to be inter-connected, the rubber-like elastic cylindrical body being provided around outer peripheral surface thereof with `-an outer circumferential groove formed between two adjacent ~`
flat rings and arcuate in section.
The invention will now be described in greater detail with reference to the accompanying drawingsg wherein:
Fig. 1 is a longitudinal section of a flexible pipe connector according to the invention;
Figs. 2, 3 and 4 are longitudinal sections of different modified forms of a flexible pipe connector according to the invention; and Fig. 5 is a longitudinal section of a modified form of the flexible pipe connector according to the invention shown in Fig. 4.
Referring now to Fig. 1, the flexible pipe connector 1 illustrated therein is connected to the end flanges of ~`
;: .
~3798g pipes to be interconnected 2, 2 and generally formed of metals.
The flexible pipe connector 1 is composed of a rubber-like elastic cylindrical body 3 and at least two (two in the embodiment shown) flat rings 4, 4 spaced apart by a distance Q and arranged in parallel with each other, the flat rings 4, 4 having a large rigidity and mainly formed of metals. These two flat rings 4, 4 are embedded in the rubber-like elastic cylindrical body 3. Each the flat rings 4, 4 is provided at its outer side with fastening means, for example, a bolt 5, the bolt 5 being secured at its one end to the flat ring 4 and having a free end extending through ~ ;
the flange of the pipes to be interconnected 2, 2 and threadedly engaged with a nut. The rubber-like elastic cylindrical body 3 is provided at its outer peripheral surface between the opposed flat rings 4, 4 with an outer circumferential groove 6 which is arcuate in section whose radius is R.
In the above mentioned flexible pipe connector 1, `
it is preferable to make the total bonding force F acting ~
between the flat rings 4 and the rubber-like elastic ` -cylindrical body 3 equal to the total strength P of that ~"
section of the rubber-like elastic cylindrical body 3 `~
which is the smallest in strength, that is, the total ~
strength P of the section of the base portion of the outer -circumferential groove 6 so as to prevent the flexible pipe connector 1 from being locally subjected to heavy load.
In order to provide such preferable flexible pipe -connector 1, the radius R of the outer circumferential groove 6 can be defined as follows.
:; - . - : , ~ o~37 9~9 Let Dl: Inner diameter of the pipe connector 1, D2: Outer diameter of the pipe connector 1, m : Depth of the outer circumferential groove 6, - Q : Distance between the inside surfaces of the opposed flat rings 4, 4, ;~
aA: Bonding force acting between the flat ring 2 and the rubber-like elastic cylindrical body 3, and aB: Strength of the rubber like elastic cylindrical hody 3, then, as can be seen from the construction of the pipe connector 1, the outer diameter of the flat ring 4 substan~
tially equal to the outer diameter D2 of the pipe connector 1 and the inner diameter of the flat ring 4 is substantially equal to the inner diameter Dl of the pipe connector 1.
So, the total bonding force F acting between the flat ring 4 and the rubber-like elastic cylindrical body 3 -~ ~-is given by F = ~D22-Dl2~A. :: .
In addition, the strength P of that section of ~:
the rubber-like elastic cylindrical body 3 which is the smallest in strength, that is, the section of the base portion ; -:
of the outer circumferential groove 6 is given by : ~ :
,.. ~:: .
P = ~{(D 2 - 2m) 2 - Dl 2 } ~B. :~ :
- ,. .
By the above described reasons, it is preferable ~. .
~, 37 9~
that F=P and m<~-, so that m is given by m = ~ { D2-JD22~A)~ A)Dl2 }.
The radius of curvature R is given as follows.
(I) if m ~, then R2 = (R-m)2~)2 ~, Hence R = lz(g'm'm~
Alternatively, ~II) if m>~, then ~; :.
~. .
R = ~
,'' '-; .' where ~ is a thickness of a lining coated on the flat ring 4.~
For example, let . ~ .;
Dl = 100 cm, D2 = 120 cm, Q = 10 cm~
~A = 100 Kg/cm2, and :
aB = 200 Kg/cm2 -.
then m = 5 cm and m = Q2' -~
Thus, if provision is made of an outer circum-~ferential groove 6 whose radius of curvature R = 5 cm, an excellent flexible pipe connector 1 which is not subjected to any local load can be obtained 10379~9 n the embodiment shown in Fig. 1, as fastening ~:
means for fastening the pipe connector 1 to the pipes to be interconnected 2, 2, provision is made o:E bolts 5, 5 one end of which is secured to the respective flat rings 4, 4.
Alternatively, such ~astening means may comprise a pipe 7 made integral with each the flat plates 4 as shown in Fig. 2. The pipe 7 is fitted around the pipes to be interconnected 2, 2 and may be secured thereto with the aid of a weld bead 8. ~-In another embodiment according to the invention shown in Fig. 3, provision is made of three parallel flat plates 4, 4, 4 equally spaced apart ~rom each other by Q and : embedded in the rubber-like elastic cylindrical body 3.
The present embodiment permits the pipe connector 1 to more : .
largely displaced. As fastening means for fastening the pipe connector 1 to the pipes to be interconnected 2, 2, each `~
the two flat rings 4, 4 is provided with a tapped hole 9 ;
adapted to be threadedly engaged with a bolt (not shown) which is extended through a flange integrally formed with the respective pipes to be connected 2, 2.
In a further modified embodiment shown in Fig. 4, the pipes to be connected 2, 2 are provided at their opposed `~
ends with flanges 17, 18. To the diametrically opposite ends of the flanges 17, 18 are secured two pairs of yokes . ~
10, 11, free end of which being overlapped and slidably ` .
engaged with each other through a guide pin 14 extending `~ ~-through an elongate hole 12 provided in the yoke 11 and extending in a direction parallel with the axis of the pipes to be interconnected 2, 2 and through an elongate hole 13 provided in the yoke 10 and extending in a direction of `
- 7 - :
- 1~379~
a tangent drawn perpendicular to the axis of the pipes to be interconnected 2, 2. This pin-hole connection permits the pipes to be interconnected 2, 2 to displace in the axial direction as well as in the direction perpendicular thereto.
At least overlapped regions of respective yokes 10, 11 are made into two planes extending in the tangential direction to the pipes to be interconnected 2, 2 and also in ~`~
the axial direction thereof so as to permit not only the ~ -cylindrical body 3 to displace due to contraction and elonga- -tion or bending thereof but also the pipes to be interconnected
Heretofore, it has been the common practice to connect the opposite end flanges of pipes to be interconnected with each o~cher by means of flexible pipe connectors each inserted 'oetween two adjacent pipes to be interconnected.
However, when the ground becomes unevenly dipped, -for example, that tends to locally displace the pipes to be interconnected and induce discrepancies in alignment, provision must be made of a number of short pipe connectors so as to absorb and compensate for such amount of displacement mainly con-sisting of the amount of dip of the ground.
An object of the invention, therefore, is to provide a flexible pipe connector which makes use of de-formable property of a rubber-like elastic body and partic-ularly, utilizes shearing property thereof that tends to readily deform it, which can absorb considerably large amount ~ ~
of displacement of pipes to be interconnected with a short ~-pipe connector subjected to light load, and which can `
alleviate the load subjected from both ends of the pipe connector to pipes to be interconnected whereby the pipe line can be protected.
Another object of the invention is to provide a flexible pipe connector which comprises yokes secured to `~
opposed pipes to be interconnected, free ends of the yokes being slidably overlapped with each other and provided with ~
crossed elongate holes adapted to be guided by a pin, and -. .. . . . . - , . :
. . .
~37 9~9 which can permit pipes to be interconnected to displace in directions such that discrepancies in alignment thereof are compensatsd.
A further object of the invention is to provide a flexible pipe connector which can detachably be secured to pipes to be interconnected without necessitating any displace-ment thereof.
A feature of the invention is the provision of a flexible pipe connector comprising a rubber-like elastic cylindrical body, at least two flat rings spaced apart from each other in parallel and embedded in the rubber-like cylindrical body, and fastening means for fastening those flat rings which are arranged at the opposite ends of the rubber-like elastic cylindrical body to pipes to be inter-connected, the rubber-like elastic cylindrical body being provided around outer peripheral surface thereof with `-an outer circumferential groove formed between two adjacent ~`
flat rings and arcuate in section.
The invention will now be described in greater detail with reference to the accompanying drawingsg wherein:
Fig. 1 is a longitudinal section of a flexible pipe connector according to the invention;
Figs. 2, 3 and 4 are longitudinal sections of different modified forms of a flexible pipe connector according to the invention; and Fig. 5 is a longitudinal section of a modified form of the flexible pipe connector according to the invention shown in Fig. 4.
Referring now to Fig. 1, the flexible pipe connector 1 illustrated therein is connected to the end flanges of ~`
;: .
~3798g pipes to be interconnected 2, 2 and generally formed of metals.
The flexible pipe connector 1 is composed of a rubber-like elastic cylindrical body 3 and at least two (two in the embodiment shown) flat rings 4, 4 spaced apart by a distance Q and arranged in parallel with each other, the flat rings 4, 4 having a large rigidity and mainly formed of metals. These two flat rings 4, 4 are embedded in the rubber-like elastic cylindrical body 3. Each the flat rings 4, 4 is provided at its outer side with fastening means, for example, a bolt 5, the bolt 5 being secured at its one end to the flat ring 4 and having a free end extending through ~ ;
the flange of the pipes to be interconnected 2, 2 and threadedly engaged with a nut. The rubber-like elastic cylindrical body 3 is provided at its outer peripheral surface between the opposed flat rings 4, 4 with an outer circumferential groove 6 which is arcuate in section whose radius is R.
In the above mentioned flexible pipe connector 1, `
it is preferable to make the total bonding force F acting ~
between the flat rings 4 and the rubber-like elastic ` -cylindrical body 3 equal to the total strength P of that ~"
section of the rubber-like elastic cylindrical body 3 `~
which is the smallest in strength, that is, the total ~
strength P of the section of the base portion of the outer -circumferential groove 6 so as to prevent the flexible pipe connector 1 from being locally subjected to heavy load.
In order to provide such preferable flexible pipe -connector 1, the radius R of the outer circumferential groove 6 can be defined as follows.
:; - . - : , ~ o~37 9~9 Let Dl: Inner diameter of the pipe connector 1, D2: Outer diameter of the pipe connector 1, m : Depth of the outer circumferential groove 6, - Q : Distance between the inside surfaces of the opposed flat rings 4, 4, ;~
aA: Bonding force acting between the flat ring 2 and the rubber-like elastic cylindrical body 3, and aB: Strength of the rubber like elastic cylindrical hody 3, then, as can be seen from the construction of the pipe connector 1, the outer diameter of the flat ring 4 substan~
tially equal to the outer diameter D2 of the pipe connector 1 and the inner diameter of the flat ring 4 is substantially equal to the inner diameter Dl of the pipe connector 1.
So, the total bonding force F acting between the flat ring 4 and the rubber-like elastic cylindrical body 3 -~ ~-is given by F = ~D22-Dl2~A. :: .
In addition, the strength P of that section of ~:
the rubber-like elastic cylindrical body 3 which is the smallest in strength, that is, the section of the base portion ; -:
of the outer circumferential groove 6 is given by : ~ :
,.. ~:: .
P = ~{(D 2 - 2m) 2 - Dl 2 } ~B. :~ :
- ,. .
By the above described reasons, it is preferable ~. .
~, 37 9~
that F=P and m<~-, so that m is given by m = ~ { D2-JD22~A)~ A)Dl2 }.
The radius of curvature R is given as follows.
(I) if m ~, then R2 = (R-m)2~)2 ~, Hence R = lz(g'm'm~
Alternatively, ~II) if m>~, then ~; :.
~. .
R = ~
,'' '-; .' where ~ is a thickness of a lining coated on the flat ring 4.~
For example, let . ~ .;
Dl = 100 cm, D2 = 120 cm, Q = 10 cm~
~A = 100 Kg/cm2, and :
aB = 200 Kg/cm2 -.
then m = 5 cm and m = Q2' -~
Thus, if provision is made of an outer circum-~ferential groove 6 whose radius of curvature R = 5 cm, an excellent flexible pipe connector 1 which is not subjected to any local load can be obtained 10379~9 n the embodiment shown in Fig. 1, as fastening ~:
means for fastening the pipe connector 1 to the pipes to be interconnected 2, 2, provision is made o:E bolts 5, 5 one end of which is secured to the respective flat rings 4, 4.
Alternatively, such ~astening means may comprise a pipe 7 made integral with each the flat plates 4 as shown in Fig. 2. The pipe 7 is fitted around the pipes to be interconnected 2, 2 and may be secured thereto with the aid of a weld bead 8. ~-In another embodiment according to the invention shown in Fig. 3, provision is made of three parallel flat plates 4, 4, 4 equally spaced apart ~rom each other by Q and : embedded in the rubber-like elastic cylindrical body 3.
The present embodiment permits the pipe connector 1 to more : .
largely displaced. As fastening means for fastening the pipe connector 1 to the pipes to be interconnected 2, 2, each `~
the two flat rings 4, 4 is provided with a tapped hole 9 ;
adapted to be threadedly engaged with a bolt (not shown) which is extended through a flange integrally formed with the respective pipes to be connected 2, 2.
In a further modified embodiment shown in Fig. 4, the pipes to be connected 2, 2 are provided at their opposed `~
ends with flanges 17, 18. To the diametrically opposite ends of the flanges 17, 18 are secured two pairs of yokes . ~
10, 11, free end of which being overlapped and slidably ` .
engaged with each other through a guide pin 14 extending `~ ~-through an elongate hole 12 provided in the yoke 11 and extending in a direction parallel with the axis of the pipes to be interconnected 2, 2 and through an elongate hole 13 provided in the yoke 10 and extending in a direction of `
- 7 - :
- 1~379~
a tangent drawn perpendicular to the axis of the pipes to be interconnected 2, 2. This pin-hole connection permits the pipes to be interconnected 2, 2 to displace in the axial direction as well as in the direction perpendicular thereto.
At least overlapped regions of respective yokes 10, 11 are made into two planes extending in the tangential direction to the pipes to be interconnected 2, 2 and also in ~`~
the axial direction thereof so as to permit not only the ~ -cylindrical body 3 to displace due to contraction and elonga- -tion or bending thereof but also the pipes to be interconnected
2, 2 to displace in opposite directions shown by arrows ~
.
and That is, even when discrepancies in alignment of ~ `
the pipes to be interconnected 2, 2 occur, the pin 14 serves `~-- 15 to guide the yoke 10 or 11 along the tangentially extendingelongate hole 13. As a result, it is possible to absorb the discrepancies in alignment of the pipes to be interconnected 2, 2 with no resistance subjected thereto. If the displace-ment of the yoke 11 in the direction shown by the arrow ~
becomes excessively large, the pin 14 reaches to the upper ; ~-end of the elongate hole 13 to permit no further displacement of the yoke 11. So, the pipe connector 1 can effectively be prevented from becoming broken.
The axially extending elongate hole 12 serves to not only freely contract and elongate the pipe connector 1 `
in its axial direction but also exhibit its flexibility in the case of bending it.
In order to insert the pipe connector 1 between actual rigid type pipes to be interconnected 2, 2 in an easily detachable manner, it is necessary to compress the :: :
.
~ 6~3~9~
rubber-like elastic cylindrical body 3 and reduce its length in its axial direction. For this purpose, the pipes to be interconnected 2, 2 are provided inside their respecti~e flanges 17, 18 with ring-shaped plates 15, 16, respectively.
These ring-shaped plates 15, :L6 are aligned coaxially wi~h the rubber-like elastic cylinclrical body 3 and have outer :
peripheral edge portions 21, 21 projected outwardly from the pipes to be interconnected 2, 2 and provided at their dia-metrically opposite positions with holes 19, 20.
In the case of inserting the pipe connector l between the pipes to be interconnected 2, 2, the bolts 5~ 5 `~
whose respective inner ends are secured to the flat rings 4, 4 by welding or anchoring are inserted into the holes provided in the flanges 17, 18 and the ring-shaped plates 15, 16 and then nuts are threadedly engaged with the bolts 5, 5.
In the case of removing the pipe connector 1 from ~ :
the pipes to be interconnected 2, 2, the nuts are removed : :-from the bolts 5, 5 and then threaded bars 23, 24 are extended through the holes 19, 20 provided in the peripheral edge portions 21, 22 of the ring-shaped plates 15, 16. ` :~
Then, nuts are threadedly engaged with both ends of the bars 23, 24 so as to urge the ring-shaped plates 15, 16 against the rubber-like elastic cylindrical body 3 thus compressing it. Subsequently, the yokes lO, 11 are made loose and the rubber-like elastic cylindrical body 3 is removed out of the -~
pipes to be interconnected 2, 2.
As stated hereinbefore, the flexible pipe connector according to the invention has a number of advantages. In the first place, the use of at least two flat rings embedded :: :- .:. .. .- : . .
lW7~39 in a rubber-like elastic cylindrical body and the use of fastening means provided at the ends of the flat rings and -for selectively and interchangeably fastening the ends of the flat rings to pipes to be interconnected make it possible to utilize deformable property of the rubber-like elastic `
cylindrical body, particularly, utilize shearing property thereof that tends to readily deform it. As a ~esult, short pipe connectors burried in the ground can absorb considerably `
large amount of displacement of the pipes to be interconnected which occurs when the ground becomes unevenly dipped or the pipes to be interconnected are subjected to lar~e displacement ` ;
caused by difference between the nature of the ground. In -;;
this case, only a light load is subjected to both the ~ `~
rubber-like elastic cylindrical body and the pipes to be interconnected, thereby protecting the pipe line from becoming broken. Secondly, provision of an outer peripheral groove which is arcuate in section between two adjacent flat rings ensures an absence of concentration of stress exerted upon the rubber-like elastic cylindrical body. Third, a selection of the depth of the outer circumferential groove such that the total bonding force acting between the fIat rings and the rubber-like elastic cylindrical body is made equal to the total strength of the section of the base portion of the rubber-like elastic cylindrical body can prevent the pipe connector from being subjected to local load. Fourth, it is possible to improve the efficiency of ?
using materials for the rubber-like elastic cylindrical body. Finally, the invention is capable of effectively absorbing large displacement of the pipes to be interconnected, particularly, displacement thereof caused by discrepancies : :
- 1 0 ~
1g3~ 9 in alignment, so that a pipe l.ine is effectively prevented from being subjected to irrational force produced when the ground becomes unevenly dipped.
~' :
;.
.
and That is, even when discrepancies in alignment of ~ `
the pipes to be interconnected 2, 2 occur, the pin 14 serves `~-- 15 to guide the yoke 10 or 11 along the tangentially extendingelongate hole 13. As a result, it is possible to absorb the discrepancies in alignment of the pipes to be interconnected 2, 2 with no resistance subjected thereto. If the displace-ment of the yoke 11 in the direction shown by the arrow ~
becomes excessively large, the pin 14 reaches to the upper ; ~-end of the elongate hole 13 to permit no further displacement of the yoke 11. So, the pipe connector 1 can effectively be prevented from becoming broken.
The axially extending elongate hole 12 serves to not only freely contract and elongate the pipe connector 1 `
in its axial direction but also exhibit its flexibility in the case of bending it.
In order to insert the pipe connector 1 between actual rigid type pipes to be interconnected 2, 2 in an easily detachable manner, it is necessary to compress the :: :
.
~ 6~3~9~
rubber-like elastic cylindrical body 3 and reduce its length in its axial direction. For this purpose, the pipes to be interconnected 2, 2 are provided inside their respecti~e flanges 17, 18 with ring-shaped plates 15, 16, respectively.
These ring-shaped plates 15, :L6 are aligned coaxially wi~h the rubber-like elastic cylinclrical body 3 and have outer :
peripheral edge portions 21, 21 projected outwardly from the pipes to be interconnected 2, 2 and provided at their dia-metrically opposite positions with holes 19, 20.
In the case of inserting the pipe connector l between the pipes to be interconnected 2, 2, the bolts 5~ 5 `~
whose respective inner ends are secured to the flat rings 4, 4 by welding or anchoring are inserted into the holes provided in the flanges 17, 18 and the ring-shaped plates 15, 16 and then nuts are threadedly engaged with the bolts 5, 5.
In the case of removing the pipe connector 1 from ~ :
the pipes to be interconnected 2, 2, the nuts are removed : :-from the bolts 5, 5 and then threaded bars 23, 24 are extended through the holes 19, 20 provided in the peripheral edge portions 21, 22 of the ring-shaped plates 15, 16. ` :~
Then, nuts are threadedly engaged with both ends of the bars 23, 24 so as to urge the ring-shaped plates 15, 16 against the rubber-like elastic cylindrical body 3 thus compressing it. Subsequently, the yokes lO, 11 are made loose and the rubber-like elastic cylindrical body 3 is removed out of the -~
pipes to be interconnected 2, 2.
As stated hereinbefore, the flexible pipe connector according to the invention has a number of advantages. In the first place, the use of at least two flat rings embedded :: :- .:. .. .- : . .
lW7~39 in a rubber-like elastic cylindrical body and the use of fastening means provided at the ends of the flat rings and -for selectively and interchangeably fastening the ends of the flat rings to pipes to be interconnected make it possible to utilize deformable property of the rubber-like elastic `
cylindrical body, particularly, utilize shearing property thereof that tends to readily deform it. As a ~esult, short pipe connectors burried in the ground can absorb considerably `
large amount of displacement of the pipes to be interconnected which occurs when the ground becomes unevenly dipped or the pipes to be interconnected are subjected to lar~e displacement ` ;
caused by difference between the nature of the ground. In -;;
this case, only a light load is subjected to both the ~ `~
rubber-like elastic cylindrical body and the pipes to be interconnected, thereby protecting the pipe line from becoming broken. Secondly, provision of an outer peripheral groove which is arcuate in section between two adjacent flat rings ensures an absence of concentration of stress exerted upon the rubber-like elastic cylindrical body. Third, a selection of the depth of the outer circumferential groove such that the total bonding force acting between the fIat rings and the rubber-like elastic cylindrical body is made equal to the total strength of the section of the base portion of the rubber-like elastic cylindrical body can prevent the pipe connector from being subjected to local load. Fourth, it is possible to improve the efficiency of ?
using materials for the rubber-like elastic cylindrical body. Finally, the invention is capable of effectively absorbing large displacement of the pipes to be interconnected, particularly, displacement thereof caused by discrepancies : :
- 1 0 ~
1g3~ 9 in alignment, so that a pipe l.ine is effectively prevented from being subjected to irrational force produced when the ground becomes unevenly dipped.
~' :
;.
Claims (5)
1. A flexible pipe connector comprising a rubber-like elastic cylindrical body, at least two flat rings spaced apart from each other in parallel and embedded in said rubber-like elastic cylindrical body, and fastening means for fastening those flat rings which are arranged at the opposite ends of the rubber-like elastic cylindrical body to pipes to be interconnected, said rubber like elastic cylindrical body being provided around outer peripheral surface thereof with an outer circumferential groove formed between two adjacent flat rings and arcuate in section.
2. A flexible pipe connector as claimed in claim 1 and comprising further a yoke secured to opposed ends of said pipes to be interconnected, free ends of said yokes being slidably overlapped with each other, one of said yokes being provided at its overlapped portion with an elongate hole extending in parallel with the axis of said pipes to be interconnected, another yoke being provided at its overlapped portion with an elongate hole extending in parallel with a tangent touching said pipes to be inter-connected and extending in a direction perpendicular to the axis of said pipes to be interconnected, said two elongate holes being crossed with each other so as to define a hole common to said two elongate holes, and a guiding pin extending through said common hole of said two elongate holes and permitting a displacement of said pipes to be interconnected produced in the case of discrepancies in alignment thereof.
3. A flexible pipe connector as claimed in claim 1 and comprising further a ring-shaped plate arranged outside said rubber-like elastic cylindrical body and projecting above said pipes to be connected, said ring-shaped plate being provided at its diametrically opposite peripheral edge portions with holes for bolts.
4. A flexible pipe connector as claimed in claim 1, wherein a radius R of said outer circumferential groove provided at the outer peripheral surface of said rubber-like elastic cylindrical body is determined so as to satisfy the following two conditions, i e.
(1) , (2) where m is a depth of said outer circumferential groove, ?
is a distance between the inner surfaces of said two adjacent flat plates, and .alpha. is a thickness of a lining coated on said flat ring.
(1) , (2) where m is a depth of said outer circumferential groove, ?
is a distance between the inner surfaces of said two adjacent flat plates, and .alpha. is a thickness of a lining coated on said flat ring.
5. A flexible pipe connector as claimed in claim 1, wherein three flat rings are equally spaced apart in parallel and embedded in said rubber-like elastic cylindrical body.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50120246A JPS5926838B2 (en) | 1975-10-07 | 1975-10-07 | flexible pipe fittings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1037989A true CA1037989A (en) | 1978-09-05 |
Family
ID=14781440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA262,452A Expired CA1037989A (en) | 1975-10-07 | 1976-10-01 | Flexible pipe connector |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5926838B2 (en) |
| CA (1) | CA1037989A (en) |
| GB (1) | GB1512320A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2742616C2 (en) * | 1977-09-22 | 1983-12-08 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Vibration-isolating intermediate flange arranged between two pipe sockets, in particular a carburetor and an intake manifold of an internal combustion engine |
| JPS6023514U (en) * | 1983-07-27 | 1985-02-18 | ヤマハ株式会社 | Anti-vibration joints in sound insulation devices for building structures |
| JPS61283917A (en) * | 1985-06-11 | 1986-12-13 | Shin Etsu Polymer Co Ltd | Transparent touch coordinate input device |
| JPS61283918A (en) * | 1985-06-11 | 1986-12-13 | Shin Etsu Polymer Co Ltd | Touch coordinate input device |
| JPH073650B2 (en) * | 1985-08-07 | 1995-01-18 | 株式会社ニコン | Information input device |
| JPS62105325A (en) * | 1985-10-31 | 1987-05-15 | シャープ株式会社 | Menbrane touch panel |
| DE19758574A1 (en) * | 1997-08-11 | 1999-09-30 | Daimler Chrysler Ag | Device for connecting two tubular line parts in the exhaust system of a motor vehicle |
| US11719308B1 (en) * | 2020-12-05 | 2023-08-08 | Dongyuan Wang | Damping segmental ring structure for subway tunnels built in grim environments of deformable ground |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4837412U (en) * | 1971-09-06 | 1973-05-08 |
-
1975
- 1975-10-07 JP JP50120246A patent/JPS5926838B2/en not_active Expired
-
1976
- 1976-10-01 CA CA262,452A patent/CA1037989A/en not_active Expired
- 1976-10-06 GB GB4146276A patent/GB1512320A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1512320A (en) | 1978-06-01 |
| JPS5244418A (en) | 1977-04-07 |
| JPS5926838B2 (en) | 1984-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3216746A (en) | Sealing ring coupling | |
| US4779900A (en) | Segmented pipe joint retainer glands | |
| CA1037989A (en) | Flexible pipe connector | |
| CN109424807B (en) | Tongue-and-groove joint | |
| US4037861A (en) | Expansion joint | |
| EP0794379A1 (en) | A pipe repair or jointing collar | |
| US3341232A (en) | Pipe joint | |
| AU5350598A (en) | Buoyant device | |
| SE467018B (en) | PIPE CONNECTION WITH A TENSIVE CLAMP FOR FIXING OF UNPROFILED PIPES | |
| CA2019458A1 (en) | Rigid or flexible coupling for pipes | |
| US11268646B2 (en) | Bending restrictor | |
| DE2517808B2 (en) | PIPE COUPLING | |
| DE3221333C2 (en) | Metallic corrugated hose | |
| US4502189A (en) | Coupling with outrigger parts | |
| US2721746A (en) | Turbulence preventing offset axial expansion joint | |
| US3268245A (en) | Pipe coupling | |
| EP0050390B1 (en) | Flexible tube for conveying a mixture of a liquid and a solid material | |
| DE4241622A1 (en) | Coupling for tightly joining socket free ends of two pipes - has elastomeric collar with or without outer sleeve, and at least two clamping elements | |
| CN218449416U (en) | Cable protection pipe | |
| CN210372388U (en) | Loop method rankine belongs to hose | |
| CA1294996C (en) | Universal expansion joint | |
| US2341066A (en) | Metal pipe | |
| JPS5922753Y2 (en) | Pipe fittings for cable installation | |
| JPS609505Y2 (en) | pipe fittings | |
| EP0242156A1 (en) | Improvements in or relating to tunnel lining segments and tunnel linings formed therefrom |