CA2134457C - Closure for closing a pressurized medium flow channel in a pipe system under pressure - Google Patents
Closure for closing a pressurized medium flow channel in a pipe system under pressure Download PDFInfo
- Publication number
- CA2134457C CA2134457C CA002134457A CA2134457A CA2134457C CA 2134457 C CA2134457 C CA 2134457C CA 002134457 A CA002134457 A CA 002134457A CA 2134457 A CA2134457 A CA 2134457A CA 2134457 C CA2134457 C CA 2134457C
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- Canada
- Prior art keywords
- closure
- media
- elements
- connection piece
- absorb
- Prior art date
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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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/11—Plugs
Abstract
A novel type of closure (2) is used for closing a medium flow channel (1) in a pipe system under pressure, in particular for closing a flow channel of a drinkable water delivery pipe system. The closure (2) consists of at least two elements (5) which receive the medium pressure and which are releasably coupled to each other by a joining piece (11) so that the closure (2) may be opened by removing the joining piece (11).
Description
CLOSURE FOR CLOSING A PRESSURIZED MEDIUM FLOW
CHANNEL IN A PIPE SYSTEM UNDER PRESSURE
The invention relates to a closure for closing a media duct of a pressure pipe system for a pressurized gaseous or liquid medium at a closure region, in particular for closing a media duct of a pipe system for a drinking supply at the closure region.
It is known and customary to seal off or to close pressure piping or media ducts of such piping, which are currently not being used, by means of closures formed by closure caps or closure stoppers.
For example (to prepare branch lines to a house), in accordance with the Regulations on Drinking Water and the associated DIN 1988 ("Drinking water pipe systems on building plots - technical regulation for installation and operation"), blank branch lines which are connected to a main supply line, lead onto a building plot and are closed there are not permissible. It has therefore previously been necessary, for a new branch line, to expose the main supply line generally laid below a road in order then 'to be able to linkup the branch line. Complex breaking-open and excavation work is necessary for this purpose, which is unavoidable according to the present state of the art even in the case of new building areas since, even in that case, 'the branch line to the house or building is generally not linked up until after the main supply line has been laid.
The objection of the invention is to specify a closure which allows a media duct of a pressure pipe system, in particular a water supply system, to be closed permanently at a closure region provided for this purpose and which, if required, can be opened from a point located at a distance away from said closure region without the closure region having to be accessible for this purpose.
To achieve this object, a closure according to the invention forms an axial support: for transmitting the media pressure from the closure to the media duct at a radially outer partial region relative to the closure axis, the closure having at least two elements which absorb the media pressure, extend radially away from a connection piece provided at least partially on a pressureless side of the closure and, with radially outer ends, form the axial support for transmitting the media pressure from the closure to the media channel and are connected to one another via the connection piece, wherein, to form a closure which can be opened, the connection piece can be moved relative to the elements which absorb the media pressure and are supported against one or both of forces and moments on the connection piece resulting from the media pressure, in the direction of the closure axis in order to cause the closure to open by removing the support of the ' elements absorbing the media pressure on the connection piece.
- 2a -In particular, the closure according to the invention also fulfills the requirements of the Regulation on Drinking Water and can thus be used in a particularly advantageous manner in pressure pipe systems for drinking water supply wherever a branch line is to be linked up to a main supply line at a later date.
The media duct in which the closure according to the invention is installed may be the duct of a tap valve or the duct of a branch union piece. In the installed state, the closure separates the water-conducting part or the pressure side of the media duct from the non-water-conducting part or from the pressureless side of said media duct, said pressureless side being formed by a piece of pipe which leads up to a region which is spatially remote from the closure region, lies outside the road and is or can be made accessible without difficulty.
The closure according to the invention is preferably used in such a way that is placed directly after the connection point for the branch lime to the house (gate valve for the branch line to the house), and the media pipe (e. g.
plastic pressure pipe) forming the branch line to the house is laid to the length later required. The tightness of the connection point (gate valve for tlhe branch line to the house) with the main line can be tested without the branch line to the house being put into operation.
If the branch line to the house is required at a later date, the end of the media pipe foaming the branch line to the house is exposed outside the road, a closure lid which closes the media pipe is removed and, with the aid of the pulling means extending up to said end and connected to the connection piece of the closure, the connection piece is moved relative to the other parts of the closure in such a way that said closure opens by col:Lapsing under the water pressure. The connection piece is pulled out of the media pipe forming the branch line to the house. The other parts of the closure are washed away by the water flowing through the media pipe.
Further developments of the invention are the subject matter of the subclaims. The invenl~ion is explained in greater detail below by way of exemplary embodiments with reference to the figures, in which.:
Figure 1 shows a diagrammatic illustration of a closure arranged in a media duct of a pipe system according to the invention;
Figure 2 shows a front view of the closure or a view of the pressure side of a disk-shaped closure element, in the viewing direction of arrow A of Figure 1;
Figure 3 shows a perspective, exploded illustration of the elements of the closure according to Figure 1;
Figures 4 - 7 show, in a similar illustration to that of Figure 1, the closure in different states during the opening of a closed closure region to explain the functioning;
Figure 8 shows a similar illustration to that of Figure 1, but with the closure integrated in a branch union piece;
Figure 9 shows, in a diagrammatic illustration and in section, various possible installation examples of the closure, namely in a branch union piece provided on a gate valve housing or on the gate valve housing;
Figure 10 shows, in an enlarged partial illustration and in section, a further preferred embodiment of the closure according to the invention;
Figure 11 shows a plan view of the disk-shaped closure element of the closure of Figure 10 in the viewing direction of arrow B;
Figures 12 - 14 show, in partial section and in an illustration as in Figur~ss 6 and 7, further possible embodiments.
In Figures 1 - 6, 1 generally denotes a media duct 1 formed in a pipe system for drinking water supply, specifically in the region of a closure 2 which closes said media duct, i.e. in a closure region 3. As is also shown in the following description, the media duct 1 can be implemented in many different ways.
The closure 2 is designed in :such a way that it seals off the pressureless part 1' of the media duct 1, which does not conduct drinking water and is chown on the right in Figure 1, relative to the part 1" of the media duct which conducts drinking water, has the meadia or water pressure and is shown on the left in Figure 1, :specifically, in particular, also relative to the meadia pressure prevailing in the part 1" and indicated by the arrows P.
Furthermore, the closure 2 is designed in such a way that it can be opened at a site which is spatially remote from the closure region 3 by a pulling element 4 running in the part 1' of the media duct 1, specifically, for example, to make the connection of a branch line to the house to the supply line of a drinking water supply network.
Specifically, the closure 2 consists of a circular disk-shaped closure element 5 which extends with a circumference into an annular groove-like widening 6 formed in the wall of the media duct 1 and is supported 'there at the edge by the circumferential side facing away from the part 1" against an annular seal 7 which is likewise provided in the widening 6 and concentrically surrounds the axis of the media duct 1.
Furthermore, the closure 2 consists of a plurality of support elements 8, which are essentially of angular design in each case and have a first, limb-like segment 9 and a second segment 10. Each support element 8 is made integrally with its two segments 9 and 10, fo:r example as a casting of plastic or metal or of another suitable material. Each segment 10 forms a part of a circular hollow cylinder and is arranged in such a way that, with its concave side, it faces the longitudinal axis or axis of symmetry S of the closure 2 lying equiaxially with the axis of the media duct 1, which axis of symmetry S also forms the :mid-axis of the disk-shaped closure element 5.
Relative to the axis S, each segment 9 projects radially from the segment 10 and forms a contact and support surface for the back 5 " of the closure element 5 facing away from the front or pressure side 5'. With their radially outer ends, the segments 9 extend into t:he widening 6 so that the media pressure P is absorbed by the closure 2 via said ends.
The closure element 5 is thus relieved virtually completely from compression loading by the water pressure P.
_ , _ 2134457 Furthermore, the closure 2 comprises a holding or connection piece 11 for the support elements 8 which are provided there, distributed evenly around the axis S. The connection piece 11, which is designed to be rotationally symmetrical to the axis S in the embodiment illustrated, has, in cross sectional planes perpendicular to said axis of symmetry S, a maximum cross section which is considerably smaller than the inner cross section of the media duct 1. The connection piece 11, which is likewise produced as a moulding or casting from a suitable material, for example from plastic or metal, is essentially made integrally with a sleeve-like section il' which extends with its. open end face up to the back 5 " of the closure element 5, of a cylindrical section 11 " of solid construction adjoining the other end of the section 11', and of a flange-shaped section 11" '. The latter, at the transition between the sections 11' and 11 "
is formed approximately in the middle of the connection piece, projects radially beyond th.e sections 11' and 11" and is provided on its side facing away from the section 11 "
with a recess which is formed by an annular groove 12 which is open in the axial direction, i.e. in the direction toward the closure element 5. The segments 10 of all the support elements 8 extend into said annular groove 12 with their ends located at a distance from the respective segment 9. With the outer surface of the section 11', the connection piece 11 _ 8 _ 2134451 thus forms, for each support element 8 or for the segment 10 at that point, a first support surface for the inner surface of the segment 10 facing away from the respective segment 9, specifically, in particular, at the region adjacent to the closure element 5, and, with the radially outer boundary surface of the annular groove 12 surrounding the axis S, forms a second support surface 14 for the outer surface of the segment 10 facing away from the axis S. Despite the releasable connection of the support elements 8 and the common connection piece 11, all the forces and moments resulting from the water pressure P and acting on the segments are transmitted to the connection piece 11 by the two contact or support surfaces 13 and 14, specifically essentially in the form of forces acting radially inward on the contact surfaces 13 and essentially in the form of forces acting radially outward on the contact surfaces 14, in which case, due to the distribution of a plurality of support elements 8, the forces and moments transmitted by said support elements to the connection piece 11 are mutually compensated.
Seated in the sleeve-like section 11' is a bolt 15 which is arranged with its axis equiaxial with the axis of symmetry S, penetrates the closure element 5 in the region of a central opening 16 and bears with a bolt head 15' against the front 5' of the closure element 5. It is ensured by sealing _ g _ means (not illustrated in detail) lthat the bolt 15 penetrates the closure element 5 in a sealed manner. By means of an elongate hole 17 which is provided in the bolt 15 and into which a securing splint 18 engages, which is held at both ends in the sleeve-like section 11', a relative movement between the connection piece 11 and the bolt 15 by a given amount is possible. By means of a compression spring 19, provided in the bolt 15 and acting on the securing splint 18, the bolt 15 is prestressed in such a way that it bears with its head 15' resiliently against the front 5' of the closure element 5, and the closure 2 and its parts are thus also held together, in particular prior to installation in the media duct 1.
Extending from the end of the connection piece 11 facing away from the closure element 5 is a rod-like projection 20 which is arranged equiaxially with the axis S. Said projection 20 forms a part of the pulling element 4 and has, at its end, an eyelet 21 to which one end of a pull cord 22 is attached, which pull cord is laid in the part 1' of the media duct 1 up to a suitable site located at a distance from the closure region 3.
In the state illustrated, in particular, in Figures 1 and 3, the media duct 1 is closed permanently in the region 3. If the media duct 1 is to be opeaned, the connection piece 11 is moved, by pulling the pull cord 22, in the axial direction of the media duct 1; the: support elements 8 or their segments 10, held at their radially outer ends in the widening 6, finally becoming disengaged from the annular groove 12, as is illustrated in Figure 5. As a result, the mutual support of the support elements 8 on the connection piece 11 is lost, such that the support elements 8 can no longer bring about a support of the closure element 5 and the latter is pressed in increasingly by the water pressure (Figure 6). In accordance with Figure 7, the closure element finally breaks up into single parts 23 which are washed out, together with the loose support elements 8, by the water flowing into the part 1~. The connection piece il and the bolt 15 are removed from the media duct 1 by the pull cord 22.
The closure 2 described thus ;has the advantage that connection lines or connections in a pipe system for drinking water can be prepared for later connection of branch lines to a house, said branch lines (even avoiding blank pipes) being closed permanently in a manner which complies with the Regulation on Drinking Water until the new branch line of the relevant building is linked up. This closure can be opened, in particular, from a spatially remote point such that opening, for example, of a road or road surface below which the supply line is laid is not required.
Figure 8 shows the arrangemeni= of the closure 2 in a branch union piece 26 between a housing 24, which may be the housing of a gate valve, and a plastic pressure pipe 25. The union piece 26 consists of two sleeve-like parts 26' and 26", of which the part 26' is screwed into the housing 24 and the part 26 " is held on the plastic pressure pipe 25.
The two parts 26' and 26" are connected to one another by threads. At the end screwed into t:he part 26', the part 26 "
has, on the inside, a widening which, when the parts 26' and 26" are connected to one another, forms the widening 6 with the annular seal 7.
Figure 9 shows a diagrammatic illustration of various installation possibilities for the closure 2, specifically with 2a the installation of said closure directly in a gate valve 27 or in the outlet or outlet channel of said gate valve and, with 2b, the installation of the closure in the branch union piece 26 connected to the gate valve 27. In both cases, the pull cord 22 is laid in the piece of pipe or plastic pressure pipe 25, forming the part 1', of a prepared branch line to a house up to an end of said piece of pipe 25 located at a distance from the gate valve 27 and is attached there to the inside of a removable closure cap 28.
Figures 10 and 11 show, as a :further preferred embodiment of the invention, a clo:pure 29 which differs from the closure 2 described above essentially only by the details described in greater detail below, but otherwise corresponds to the closure 2, such that the same reference numerals are again selected in Figures 10 and :L1 for those elements which correspond in terms of their function and design to the elements of the closure 2.
One difference relative to tree closure 2 consists in the fact that the support elements 8a corresponding to the support elements 8 have a slightly different shape, in particular the segments 9a form, on their back facing away from the closure element 5, a sloping surface 30 which encloses an angle of greater than 45° with the axis of symmetry S, said angle opening toward the closure element 5.
With the sloping surfaces 30, the support elements 8a bear against a sloping counter-surface 31 in the region of the widening 6.
Furthermore, the segments 9a also have a slope 32 on their side facing the closure element 5 in the region of the free ends so that the free ends of the segments 9a are spaced slightly apart from the back 5~~. By means of this design of the support elements 9, despite a :high media pressure P
acting on the front of the closure element 5, release of the support elements 8 from the media duct and from the connection piece 11 when the closure is opened is improved considerably.
In the closure 29 there is an annular seal 7a corresponding to the annular seal '7 on the pressure side 1" .
The closure element 5 as well as the head 15' of the bolt 15 are furthermore covered on the pre:asure side 1 " by a lamellar sealing element 33 which extends up to the edge of the closure element and is made of a rubber-like sealing material. The closure element 5 and the seals 7a and 33 between the two parts 26' and 26" forming the branch union piece 26 are tensioned over the ra<iially outer ends of the segments 9a. In the closure 29, also, the closure element 5 is again designed with intended tearing points.
Figures 13 and 14 show an embodiment which differs from the embodiment of Figures 1 - 9 only in the fact that a cord-like or cable-like element 34 is provided, which connects all the parts of the closure 2 or 29 to the connection piece 11.
As described above, the closure element 5 is provided with intended tearing points in the. closures 2 and 29. Said intended tearing points run at least partially radially relative to the axis S and are located wherever the closure element is supported on the segmenta 9 or 9a. On the back 5" , the closure element has protrusions 35 which are indicated by dashed lines in Figurs: 10 and are arranged between the segments 9a of the support elements 8a in such a way that the closure element 5 cannot rotate relative to the support elements 8a and is thus in the correct position.
Figure 12 shows, in a section along the line I-I, a section through a closure element 5a which can be used instead of the closure element 5. The clo:~ure element 5a consists of a plurality of segment-like p<~rts 36 which are connected to one another by a layer 37 forming a seal on at least one side, namely preferably on the front of the closure element. The separation surfaces 38, which run radially relative to the axis S and at which the parts 36 directly adjoin one another, form the intended tearing points. These separation surfaces 38 are inclined relative to the plane of the closure element 5a. It is guaranteed by this inclination or slope that the individual parts 36 cannot become jammed against one another, but slide over one another, when the closure is opened. The sloping separation surfaces or intended tearing points can also be implemented in another manner, in particular also in an integral closure element.
The support elements 8 and 8a were described above to be of angular design. In fact, however, these' angular pieces can also be of frustoconical design, at least on their outer surface, i.e. corresponding to the outer :surface of a part of a cone, so that, in this case, the support. elements can then also be described as frustoconical or partially frustoconical.
List of reference numerals 1 Media duct 1' Pressureless side 1" Pressure side 2a, 2b Closure 3 Closed region 4 Pulling element Closure element 5' Front 5" Back 6 Widening 7, 7a Seal 8, 8a Support element 9, 9a Segment 10, l0a Segment 11 Connection piece 11' , 11" 11"' Section , 12 Annular groove 13, 14 Support surface Bolt 15' Head 16 Opening 17 Elongate hole 18 Securing splint 19 Spring 20 Projection 21 Sleeve 22 Pull cord 23 Closure element part 24 Housing 25 Plastic pressure pipe 26 Branch union piece 26', 26 " Part 27 Gate valve 28 Closure cap 29 Closure 30 Sloping surface 31 Counter-surface 32 Slope 33 Seal 34 Cord-like element 35 Projection 36 Part 37 Coating or layer 38 Separation surface
CHANNEL IN A PIPE SYSTEM UNDER PRESSURE
The invention relates to a closure for closing a media duct of a pressure pipe system for a pressurized gaseous or liquid medium at a closure region, in particular for closing a media duct of a pipe system for a drinking supply at the closure region.
It is known and customary to seal off or to close pressure piping or media ducts of such piping, which are currently not being used, by means of closures formed by closure caps or closure stoppers.
For example (to prepare branch lines to a house), in accordance with the Regulations on Drinking Water and the associated DIN 1988 ("Drinking water pipe systems on building plots - technical regulation for installation and operation"), blank branch lines which are connected to a main supply line, lead onto a building plot and are closed there are not permissible. It has therefore previously been necessary, for a new branch line, to expose the main supply line generally laid below a road in order then 'to be able to linkup the branch line. Complex breaking-open and excavation work is necessary for this purpose, which is unavoidable according to the present state of the art even in the case of new building areas since, even in that case, 'the branch line to the house or building is generally not linked up until after the main supply line has been laid.
The objection of the invention is to specify a closure which allows a media duct of a pressure pipe system, in particular a water supply system, to be closed permanently at a closure region provided for this purpose and which, if required, can be opened from a point located at a distance away from said closure region without the closure region having to be accessible for this purpose.
To achieve this object, a closure according to the invention forms an axial support: for transmitting the media pressure from the closure to the media duct at a radially outer partial region relative to the closure axis, the closure having at least two elements which absorb the media pressure, extend radially away from a connection piece provided at least partially on a pressureless side of the closure and, with radially outer ends, form the axial support for transmitting the media pressure from the closure to the media channel and are connected to one another via the connection piece, wherein, to form a closure which can be opened, the connection piece can be moved relative to the elements which absorb the media pressure and are supported against one or both of forces and moments on the connection piece resulting from the media pressure, in the direction of the closure axis in order to cause the closure to open by removing the support of the ' elements absorbing the media pressure on the connection piece.
- 2a -In particular, the closure according to the invention also fulfills the requirements of the Regulation on Drinking Water and can thus be used in a particularly advantageous manner in pressure pipe systems for drinking water supply wherever a branch line is to be linked up to a main supply line at a later date.
The media duct in which the closure according to the invention is installed may be the duct of a tap valve or the duct of a branch union piece. In the installed state, the closure separates the water-conducting part or the pressure side of the media duct from the non-water-conducting part or from the pressureless side of said media duct, said pressureless side being formed by a piece of pipe which leads up to a region which is spatially remote from the closure region, lies outside the road and is or can be made accessible without difficulty.
The closure according to the invention is preferably used in such a way that is placed directly after the connection point for the branch lime to the house (gate valve for the branch line to the house), and the media pipe (e. g.
plastic pressure pipe) forming the branch line to the house is laid to the length later required. The tightness of the connection point (gate valve for tlhe branch line to the house) with the main line can be tested without the branch line to the house being put into operation.
If the branch line to the house is required at a later date, the end of the media pipe foaming the branch line to the house is exposed outside the road, a closure lid which closes the media pipe is removed and, with the aid of the pulling means extending up to said end and connected to the connection piece of the closure, the connection piece is moved relative to the other parts of the closure in such a way that said closure opens by col:Lapsing under the water pressure. The connection piece is pulled out of the media pipe forming the branch line to the house. The other parts of the closure are washed away by the water flowing through the media pipe.
Further developments of the invention are the subject matter of the subclaims. The invenl~ion is explained in greater detail below by way of exemplary embodiments with reference to the figures, in which.:
Figure 1 shows a diagrammatic illustration of a closure arranged in a media duct of a pipe system according to the invention;
Figure 2 shows a front view of the closure or a view of the pressure side of a disk-shaped closure element, in the viewing direction of arrow A of Figure 1;
Figure 3 shows a perspective, exploded illustration of the elements of the closure according to Figure 1;
Figures 4 - 7 show, in a similar illustration to that of Figure 1, the closure in different states during the opening of a closed closure region to explain the functioning;
Figure 8 shows a similar illustration to that of Figure 1, but with the closure integrated in a branch union piece;
Figure 9 shows, in a diagrammatic illustration and in section, various possible installation examples of the closure, namely in a branch union piece provided on a gate valve housing or on the gate valve housing;
Figure 10 shows, in an enlarged partial illustration and in section, a further preferred embodiment of the closure according to the invention;
Figure 11 shows a plan view of the disk-shaped closure element of the closure of Figure 10 in the viewing direction of arrow B;
Figures 12 - 14 show, in partial section and in an illustration as in Figur~ss 6 and 7, further possible embodiments.
In Figures 1 - 6, 1 generally denotes a media duct 1 formed in a pipe system for drinking water supply, specifically in the region of a closure 2 which closes said media duct, i.e. in a closure region 3. As is also shown in the following description, the media duct 1 can be implemented in many different ways.
The closure 2 is designed in :such a way that it seals off the pressureless part 1' of the media duct 1, which does not conduct drinking water and is chown on the right in Figure 1, relative to the part 1" of the media duct which conducts drinking water, has the meadia or water pressure and is shown on the left in Figure 1, :specifically, in particular, also relative to the meadia pressure prevailing in the part 1" and indicated by the arrows P.
Furthermore, the closure 2 is designed in such a way that it can be opened at a site which is spatially remote from the closure region 3 by a pulling element 4 running in the part 1' of the media duct 1, specifically, for example, to make the connection of a branch line to the house to the supply line of a drinking water supply network.
Specifically, the closure 2 consists of a circular disk-shaped closure element 5 which extends with a circumference into an annular groove-like widening 6 formed in the wall of the media duct 1 and is supported 'there at the edge by the circumferential side facing away from the part 1" against an annular seal 7 which is likewise provided in the widening 6 and concentrically surrounds the axis of the media duct 1.
Furthermore, the closure 2 consists of a plurality of support elements 8, which are essentially of angular design in each case and have a first, limb-like segment 9 and a second segment 10. Each support element 8 is made integrally with its two segments 9 and 10, fo:r example as a casting of plastic or metal or of another suitable material. Each segment 10 forms a part of a circular hollow cylinder and is arranged in such a way that, with its concave side, it faces the longitudinal axis or axis of symmetry S of the closure 2 lying equiaxially with the axis of the media duct 1, which axis of symmetry S also forms the :mid-axis of the disk-shaped closure element 5.
Relative to the axis S, each segment 9 projects radially from the segment 10 and forms a contact and support surface for the back 5 " of the closure element 5 facing away from the front or pressure side 5'. With their radially outer ends, the segments 9 extend into t:he widening 6 so that the media pressure P is absorbed by the closure 2 via said ends.
The closure element 5 is thus relieved virtually completely from compression loading by the water pressure P.
_ , _ 2134457 Furthermore, the closure 2 comprises a holding or connection piece 11 for the support elements 8 which are provided there, distributed evenly around the axis S. The connection piece 11, which is designed to be rotationally symmetrical to the axis S in the embodiment illustrated, has, in cross sectional planes perpendicular to said axis of symmetry S, a maximum cross section which is considerably smaller than the inner cross section of the media duct 1. The connection piece 11, which is likewise produced as a moulding or casting from a suitable material, for example from plastic or metal, is essentially made integrally with a sleeve-like section il' which extends with its. open end face up to the back 5 " of the closure element 5, of a cylindrical section 11 " of solid construction adjoining the other end of the section 11', and of a flange-shaped section 11" '. The latter, at the transition between the sections 11' and 11 "
is formed approximately in the middle of the connection piece, projects radially beyond th.e sections 11' and 11" and is provided on its side facing away from the section 11 "
with a recess which is formed by an annular groove 12 which is open in the axial direction, i.e. in the direction toward the closure element 5. The segments 10 of all the support elements 8 extend into said annular groove 12 with their ends located at a distance from the respective segment 9. With the outer surface of the section 11', the connection piece 11 _ 8 _ 2134451 thus forms, for each support element 8 or for the segment 10 at that point, a first support surface for the inner surface of the segment 10 facing away from the respective segment 9, specifically, in particular, at the region adjacent to the closure element 5, and, with the radially outer boundary surface of the annular groove 12 surrounding the axis S, forms a second support surface 14 for the outer surface of the segment 10 facing away from the axis S. Despite the releasable connection of the support elements 8 and the common connection piece 11, all the forces and moments resulting from the water pressure P and acting on the segments are transmitted to the connection piece 11 by the two contact or support surfaces 13 and 14, specifically essentially in the form of forces acting radially inward on the contact surfaces 13 and essentially in the form of forces acting radially outward on the contact surfaces 14, in which case, due to the distribution of a plurality of support elements 8, the forces and moments transmitted by said support elements to the connection piece 11 are mutually compensated.
Seated in the sleeve-like section 11' is a bolt 15 which is arranged with its axis equiaxial with the axis of symmetry S, penetrates the closure element 5 in the region of a central opening 16 and bears with a bolt head 15' against the front 5' of the closure element 5. It is ensured by sealing _ g _ means (not illustrated in detail) lthat the bolt 15 penetrates the closure element 5 in a sealed manner. By means of an elongate hole 17 which is provided in the bolt 15 and into which a securing splint 18 engages, which is held at both ends in the sleeve-like section 11', a relative movement between the connection piece 11 and the bolt 15 by a given amount is possible. By means of a compression spring 19, provided in the bolt 15 and acting on the securing splint 18, the bolt 15 is prestressed in such a way that it bears with its head 15' resiliently against the front 5' of the closure element 5, and the closure 2 and its parts are thus also held together, in particular prior to installation in the media duct 1.
Extending from the end of the connection piece 11 facing away from the closure element 5 is a rod-like projection 20 which is arranged equiaxially with the axis S. Said projection 20 forms a part of the pulling element 4 and has, at its end, an eyelet 21 to which one end of a pull cord 22 is attached, which pull cord is laid in the part 1' of the media duct 1 up to a suitable site located at a distance from the closure region 3.
In the state illustrated, in particular, in Figures 1 and 3, the media duct 1 is closed permanently in the region 3. If the media duct 1 is to be opeaned, the connection piece 11 is moved, by pulling the pull cord 22, in the axial direction of the media duct 1; the: support elements 8 or their segments 10, held at their radially outer ends in the widening 6, finally becoming disengaged from the annular groove 12, as is illustrated in Figure 5. As a result, the mutual support of the support elements 8 on the connection piece 11 is lost, such that the support elements 8 can no longer bring about a support of the closure element 5 and the latter is pressed in increasingly by the water pressure (Figure 6). In accordance with Figure 7, the closure element finally breaks up into single parts 23 which are washed out, together with the loose support elements 8, by the water flowing into the part 1~. The connection piece il and the bolt 15 are removed from the media duct 1 by the pull cord 22.
The closure 2 described thus ;has the advantage that connection lines or connections in a pipe system for drinking water can be prepared for later connection of branch lines to a house, said branch lines (even avoiding blank pipes) being closed permanently in a manner which complies with the Regulation on Drinking Water until the new branch line of the relevant building is linked up. This closure can be opened, in particular, from a spatially remote point such that opening, for example, of a road or road surface below which the supply line is laid is not required.
Figure 8 shows the arrangemeni= of the closure 2 in a branch union piece 26 between a housing 24, which may be the housing of a gate valve, and a plastic pressure pipe 25. The union piece 26 consists of two sleeve-like parts 26' and 26", of which the part 26' is screwed into the housing 24 and the part 26 " is held on the plastic pressure pipe 25.
The two parts 26' and 26" are connected to one another by threads. At the end screwed into t:he part 26', the part 26 "
has, on the inside, a widening which, when the parts 26' and 26" are connected to one another, forms the widening 6 with the annular seal 7.
Figure 9 shows a diagrammatic illustration of various installation possibilities for the closure 2, specifically with 2a the installation of said closure directly in a gate valve 27 or in the outlet or outlet channel of said gate valve and, with 2b, the installation of the closure in the branch union piece 26 connected to the gate valve 27. In both cases, the pull cord 22 is laid in the piece of pipe or plastic pressure pipe 25, forming the part 1', of a prepared branch line to a house up to an end of said piece of pipe 25 located at a distance from the gate valve 27 and is attached there to the inside of a removable closure cap 28.
Figures 10 and 11 show, as a :further preferred embodiment of the invention, a clo:pure 29 which differs from the closure 2 described above essentially only by the details described in greater detail below, but otherwise corresponds to the closure 2, such that the same reference numerals are again selected in Figures 10 and :L1 for those elements which correspond in terms of their function and design to the elements of the closure 2.
One difference relative to tree closure 2 consists in the fact that the support elements 8a corresponding to the support elements 8 have a slightly different shape, in particular the segments 9a form, on their back facing away from the closure element 5, a sloping surface 30 which encloses an angle of greater than 45° with the axis of symmetry S, said angle opening toward the closure element 5.
With the sloping surfaces 30, the support elements 8a bear against a sloping counter-surface 31 in the region of the widening 6.
Furthermore, the segments 9a also have a slope 32 on their side facing the closure element 5 in the region of the free ends so that the free ends of the segments 9a are spaced slightly apart from the back 5~~. By means of this design of the support elements 9, despite a :high media pressure P
acting on the front of the closure element 5, release of the support elements 8 from the media duct and from the connection piece 11 when the closure is opened is improved considerably.
In the closure 29 there is an annular seal 7a corresponding to the annular seal '7 on the pressure side 1" .
The closure element 5 as well as the head 15' of the bolt 15 are furthermore covered on the pre:asure side 1 " by a lamellar sealing element 33 which extends up to the edge of the closure element and is made of a rubber-like sealing material. The closure element 5 and the seals 7a and 33 between the two parts 26' and 26" forming the branch union piece 26 are tensioned over the ra<iially outer ends of the segments 9a. In the closure 29, also, the closure element 5 is again designed with intended tearing points.
Figures 13 and 14 show an embodiment which differs from the embodiment of Figures 1 - 9 only in the fact that a cord-like or cable-like element 34 is provided, which connects all the parts of the closure 2 or 29 to the connection piece 11.
As described above, the closure element 5 is provided with intended tearing points in the. closures 2 and 29. Said intended tearing points run at least partially radially relative to the axis S and are located wherever the closure element is supported on the segmenta 9 or 9a. On the back 5" , the closure element has protrusions 35 which are indicated by dashed lines in Figurs: 10 and are arranged between the segments 9a of the support elements 8a in such a way that the closure element 5 cannot rotate relative to the support elements 8a and is thus in the correct position.
Figure 12 shows, in a section along the line I-I, a section through a closure element 5a which can be used instead of the closure element 5. The clo:~ure element 5a consists of a plurality of segment-like p<~rts 36 which are connected to one another by a layer 37 forming a seal on at least one side, namely preferably on the front of the closure element. The separation surfaces 38, which run radially relative to the axis S and at which the parts 36 directly adjoin one another, form the intended tearing points. These separation surfaces 38 are inclined relative to the plane of the closure element 5a. It is guaranteed by this inclination or slope that the individual parts 36 cannot become jammed against one another, but slide over one another, when the closure is opened. The sloping separation surfaces or intended tearing points can also be implemented in another manner, in particular also in an integral closure element.
The support elements 8 and 8a were described above to be of angular design. In fact, however, these' angular pieces can also be of frustoconical design, at least on their outer surface, i.e. corresponding to the outer :surface of a part of a cone, so that, in this case, the support. elements can then also be described as frustoconical or partially frustoconical.
List of reference numerals 1 Media duct 1' Pressureless side 1" Pressure side 2a, 2b Closure 3 Closed region 4 Pulling element Closure element 5' Front 5" Back 6 Widening 7, 7a Seal 8, 8a Support element 9, 9a Segment 10, l0a Segment 11 Connection piece 11' , 11" 11"' Section , 12 Annular groove 13, 14 Support surface Bolt 15' Head 16 Opening 17 Elongate hole 18 Securing splint 19 Spring 20 Projection 21 Sleeve 22 Pull cord 23 Closure element part 24 Housing 25 Plastic pressure pipe 26 Branch union piece 26', 26 " Part 27 Gate valve 28 Closure cap 29 Closure 30 Sloping surface 31 Counter-surface 32 Slope 33 Seal 34 Cord-like element 35 Projection 36 Part 37 Coating or layer 38 Separation surface
Claims (29)
1. A closure for closing a media duct of a pressure pipe system for a pressurized gaseous or liquid medium at a closure region, the closure forming an axial support for transmitting the media pressure from the closure to the media duct at a radially outer partial region relative to the closure axis, the closure having at least two elements which absorb the media pressure, extend radially away from a connection piece provided at least partially on a pressureless side of the closure and, with radially outer ends, form the axial support for transmitting the media pressure from the closure to the media channel and are connected to one another via the connection piece, wherein, to form a closure which can be opened, the connection piece can be moved relative to the elements which absorb the media pressure and are supported against one or both of forces and moments on the connection piece resulting from the media pressure, in the direction of the closure axis in order to cause the closure to open by removing the support of the elements absorbing the media pressure on the connection piece.
2. The closure as claimed in claim 1, wherein said pressure pipe system is a pipe system for a drinking water supply.
3. The closure as claimed in claim 1 or 2, wherein the closure has at least two elements of angular or frustoconical construction which absorb the media pressure, form the axial support of the closure with radially outer ends, and are releasably connected to one another via the connection piece.
4. The closure as claimed in an:y one of claims 1 to 3 wherein the connection piece can be removed at least partially from the elements which absorb the media pressure.
5. The closure as claimed in claim 4, wherein the connection piece can be removed completely from the elements which absorb the media pressure.
6. The closure as claimed in any one of claims 1 - 5, wherein the elements which absorb the media pressure are connected to the connection piece to transmit those forces to the connection piece which act radially relative to the axis of the closure.
7. The closure as claimed in claim 6, wherein the elements which absorb the media pressure are connected to the connection piece through at least one region which is offset radially inward relative to the outer ends.
8. The closure as claimed in any one of claims 1 - 7, wherein the connection piece for each element which absorbs the media pressure forms at least two contact or support regions, of which a first region serves to absorb forces acting radially inward and a second region serves to absorb forces acting radially outward.
9. The closure as claimed in claim 8, wherein the second contact region has a greater spacing from the closure axis than the respectively associated first contact region.
10. The closure as claimed in any one of claims 1 - 9, wherein a pulling element is attached to the end of the connection piece facing away from the pressure side of the closure, which pulling element extends inside a pressureless part of the media duct up to a region which is spatially remote from the closure region.
11. The closure as claimed in claim 10, wherein the pressureless part is closed by a closure cap.
12. The closure as claimed in claim 10 or 11, wherein a rod-like projection projects from the connection piece at the end thereof facing away from the pressure side of the closure.
13. The closure as claimed in claim 12, wherein a free end of the rod-like projection is connected to a pull cord or a pull chain.
14. The closure as claimed in any one of claims 1 - 13, wherein the maximum dimensions of the elements which absorb the media pressure and the maximum dimensions which the connection piece has radially relative to the closure axis are smaller than the cross section of the media duct.
15. The closure as claimed in any one of claims 3 - 14, wherein the angular or frustoconical elements which absorb the media pressure have at least one projection which extends in the direction of the closure axis and is supported by a side facing the closure axis on a radially inner first contact region and by a radially outer side on a second, radially outer contact region of the connection piece.
16. The closure as claimed in any one of claims 1 - 15, wherein the elements which absorb the media pressure consist of a segment, extending in the direction of the closure axis, for the connection to the connection piece and of a segment which extends radially to the closure axis and forms the axial support.
17. The closure as claimed in any one of claims 1 - 16, wherein the elements which absorb the media pressure are part of a plate-like closure element which closes the cross section of the media duct.
18. The closure as claimed in claim 17, wherein the plate-like closure element is provided with intended tearing points.
19. The closure as claimed in any one of claims 1 - 18, wherein the elements which absorb the media pressure are support elements on which at least one plate-like closure element is supported which closes off the cross section of the media duct.
20. The closure as claimed in any one of claims 1 - 19, wherein a bolt is provided on the connection piece, which bolt can be advanced by a given amount in the direction of the closure axis and, as a result, holds the elements of the closure together for assembly and installation of the closure.
21. The closure as claimed in claim 20, wherein said bolt is prestressed by a spring element in such a way that its head bears against the pressure side of the closure, thereby holding the elements of the closure together.
22. The closure as claimed in claim 21, wherein the bolts holds together the connection piece and the elements which absorb the media pressure.
23. The closure as claimed in any one of claims 1 - 22, wherein the axial support formed by the elements on the media duct is a sloping surface which encloses an angle with the closure axis which opens toward the pressure side of the closure.
24. The closure as claimed in any one of claims 1 - 23, wherein the elements which absorb the media pressure having a slope at their radially outer ends on the side facing the pressure side of the closure.
25. The closure as claimed in any one of claims 1 - 24, wherein one or more of the elements which absorb the media pressure, the connection piece and the closure element are castings or mouldings.
26. The closure as claimed in claim 25, wherein the castings or mouldings are comprised of plastic or metal.
27. The closure as claimed in any one of claims 1 - 26, wherein the closure element has intended tearing points and wherein these intended tearing points are provided in the region of the elements which absorb the media pressure.
28. The closure as claimed in any one of claims 1 - 27, wherein the closure element has intended tearing points, and wherein these intended tearing points are inclined relative to the plane of the closure element.
29. The closure as claimed in any one of claims 1 - 28, wherein the closure element consists of a plurality of plate-like or segment-like parts which are held together by at least one connecting layer.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4306985 | 1993-03-05 | ||
| DEP4306985.1 | 1993-03-05 | ||
| DEP4311629.9 | 1993-04-08 | ||
| DE4311629A DE4311629C1 (en) | 1993-03-05 | 1993-04-08 | Closure for closing a media channel of a pressure line system for a medium under pressure, in particular for closing a media channel of a line system for the drinking water supply |
| PCT/DE1994/000179 WO1994020782A1 (en) | 1993-03-05 | 1994-02-25 | Closure for closing a pressurized medium flow channel in a pipe system under pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2134457A1 CA2134457A1 (en) | 1994-09-15 |
| CA2134457C true CA2134457C (en) | 2000-09-19 |
Family
ID=25923686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002134457A Expired - Fee Related CA2134457C (en) | 1993-03-05 | 1994-02-25 | Closure for closing a pressurized medium flow channel in a pipe system under pressure |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0639252B1 (en) |
| JP (1) | JPH07506660A (en) |
| AT (1) | ATE180321T1 (en) |
| CA (1) | CA2134457C (en) |
| CZ (1) | CZ262894A3 (en) |
| HU (1) | HU215100B (en) |
| SK (1) | SK131494A3 (en) |
| WO (1) | WO1994020782A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE830273C (en) * | 1945-03-08 | 1952-02-04 | Fichtel & Sachs Ag | Locking piece |
| US4215951A (en) * | 1977-08-26 | 1980-08-05 | Halliburton Company | Platform leg plug |
| US4178967A (en) * | 1978-09-14 | 1979-12-18 | Halliburton Company | Retrievable plug for offshore platforms |
| US4483457A (en) * | 1983-03-31 | 1984-11-20 | Combustion Engineering, Inc. | Hinged steam generator nozzle plug |
| US4637588A (en) * | 1984-04-30 | 1987-01-20 | Westinghouse Electric Corp. | Non-bolted ringless nozzle dam |
-
1994
- 1994-02-25 SK SK1314-94A patent/SK131494A3/en unknown
- 1994-02-25 AT AT94908254T patent/ATE180321T1/en not_active IP Right Cessation
- 1994-02-25 WO PCT/DE1994/000179 patent/WO1994020782A1/en not_active Application Discontinuation
- 1994-02-25 HU HU9403186A patent/HU215100B/en not_active IP Right Cessation
- 1994-02-25 CA CA002134457A patent/CA2134457C/en not_active Expired - Fee Related
- 1994-02-25 EP EP94908254A patent/EP0639252B1/en not_active Expired - Lifetime
- 1994-02-25 CZ CZ942628A patent/CZ262894A3/en unknown
- 1994-02-25 JP JP6519443A patent/JPH07506660A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0639252A1 (en) | 1995-02-22 |
| HUT69866A (en) | 1995-09-28 |
| ATE180321T1 (en) | 1999-06-15 |
| CZ262894A3 (en) | 1995-06-14 |
| CA2134457A1 (en) | 1994-09-15 |
| EP0639252B1 (en) | 1999-05-19 |
| JPH07506660A (en) | 1995-07-20 |
| HU215100B (en) | 1998-09-28 |
| HU9403186D0 (en) | 1995-02-28 |
| WO1994020782A1 (en) | 1994-09-15 |
| SK131494A3 (en) | 1995-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |