DE10028655B4 - Pipe connection and such a pipe connection having height-adjustable hydrant - Google Patents

Abstract

A connection (101) between an inner tube (102) and an outer tube (103) telescopically steplessly displaceable with respect to the inner, the inner tube (102) having an external thread (104) and at least partially encompassing the outer tube (103) is characterized
that the connection (101) comprises a flange (105) having an internal thread (106) complementary to the external thread (104) and screwed onto the inner tube (102);
in that the connection (101) comprises a mating flange (107) which is arranged on the outer tube (103) and cooperates with the flange (105) for positive centering of the two tubes (102, 103); and
in that a thread seal (108) is arranged on the circumference of the inner tube (102), which is deformed on tightening the flange (105) onto the counter flange (107) in such a way that a positive and tight connection between the two tubes (102, 103) arises.

Description

The Invention relates, according to a first aspect and the preamble of the independent claim 1, a connection between an inner tube and one, telescopic across from the inner steplessly movable, outer tube. This shows that inner tube on an external thread and is at least partially from the outer tube includes. The invention relates, according to a second aspect, a Hydrants with a main valve body and an extension tube, which - to stepless adjustment of the foot of the extension tube to a given Trench depth - one standing over the main valve body arranged jacket tube and a coaxial with the jacket tube and against this height-adjustable Telescopic riser for receiving the extension tube comprises. According to one third aspect, the invention relates to a hydrant, the one Interior includes, which by a in the range of an inlet pipe arranged, Hauptabsperrorgan is shut off; the one at the end, which is opposite this main shut-off, in the area of a Housing top through a housing cover is completed, wherein the inlet-side main shut-off a extending through the interior and the upper housing part actuating device with an operating rod includes.

mostly buried pipe networks and hydrants connected to such pipe networks have been around for a long time and in many different versions known. They serve primarily to remove water for firefighting the public Supply network. They are also used for communal purposes (construction water supply, Street cleaning etc.) used.

in this connection will be different versions of Pipe joints, butt-welded (for example in plastic pipes) or also flange or sleeve connections (for example in cast iron and plastic pipes) used. Common to all these pipe joints is the disadvantage that a piece of pipe to a certain length manufactured or made up or cut to size, with it a specific connector attached to a pipeline or used in an existing gap can be. In addition, falls in known pipe connections disadvantageous in the weight that - in particular in socket joints - the Replacing an example defective pipe section already from geometric establish difficult because the pipe section can not simply be put in place.

It is therefore - according to the first Aspect - one First object of the present invention, a pipe joint to create a tube that can be adjusted to a certain extent, with it the disadvantages known from the prior art are eliminated can.

Essentially, hydrants use two different types, the underfloor hydrant and the overhead hydrant. The underfloor hydrant is a water tapping point lower than the floor level and closed by a cover. The overground hydrant is - like out of CH 675 139 known (cf. 1 ) - designed as a pillar and usually consists of a non-visible, underground inlet part with obturator and riser, and an above-ground column with up to three water connections. The various lateral water connections can be equipped with additional shut-off devices and have different cross sections (eg 2 × Storz 75, 2 × Storz 55 or 1 × Storz 75 and 1 × Storz 55). The shut-off of the individual connections can, however, also be effected by fittings outside the hydrants. The central connection usually has Storz 110.

The The invention relates in the first and second aspects in this second aspect Line above ground hydrants, However, it can also be used on underground hydrants and similar water collection devices be applied.

All Hydrants are with a Hauptabschlussorgan, or Hauptabsperrorgan equipped, that usually is arranged in the region of a bottom-side inlet pipe. At the inlet pipe adjoins a hollow body whose interior is on the one hand through the Hauptabsperrorgan and on the other hand by a housing cover in the upper housing part can be completed. The interior is with one or more water connections or water extraction openings connected. Next is preferably a drain valve on the interior installed, which plays the important function, the interior after the use to dehydrate the hydrant. To frost damage to avoid in the winter - at closed main gate - riser and above ground Pillar mostly automatically drained, or is the drainage organ When opening the barrier is automatically closed.

Überflurhydranten can be equipped with a predetermined breaking point because of their exposed position. In case of damage hydrant, e.g. by a vehicle colliding with the overflight column, Water losses are avoided when the hydrant with a predetermined breaking point (usually between attachment tube and riser) equipped and the spindle bearing is arranged below this predetermined breaking point.

The water connection from the different on Closures or water extraction openings is usually activated by an additional, removal-side obturator or a Nebenabsperrorgan. This makes it possible that when connecting another reference line an existing water transport does not have to be interrupted. Also, regulating or metering functions with the intake-side main shut-off device described at the outset - hereinafter referred to as "main shut-off" - can not be perceived.

As tubes are common also with hydrants the desire, consisting of the tubular intermediate part from toppipe and riser, to certain conditions, such as trench depth or pipe cover (earth coverage of the pipe system), without the on-tower and / or riser a pipe section to a certain length must be made or made or cut to size.

From the state of the art, for example, the above-ground hydrant telescopic 14/1 produced by E. Hawle & Co., Flanschen- and Armaturenwerke, Vöcklabruck (Austria) is known (cf. 2 ). This embodiment is a proven hydrant dar. However, the design of this hydrant requires that specially qualified staff with the assembly or service must be entrusted to this hydrant, so the risk of an accident - eg due to accidental loosening the screw and a subsequent pressurization of the hydrant - can be reduced.

Another embodiment is made CH 689 169 where the aforementioned above-ground hydrant produced by E. Hawle & Co. is cited: A riser casing forms the lower part of the hydrant adjoining the main valve seat. Inserted from above in the riser casing is a riser tube which has radially extending annular grooves on its outer circumference at specific intervals. However, that hydrant has the disadvantage that a stepless adjustability - as the cited hydrant from the prior art (by E. Hawle & Co.) still has - must be dispensed with.

Out CH 478 302 is also a height-adjustable hydrant known. However, the Zwischenrohrkrümmer has an external thread on which the female thread having a riser is screwed. The height of the riser can be adjusted by screwing or unscrewing. The final position is - with the interposition of a seal - secured by a locknut. The riser can, to prevent unwanted rotation of the riser, have an anti-rotation side rib acting, which prevents the riser from rotating by filled soil. This embodiment requires that both mutually displaceable tubes must have a thread. This considerably increases the cost of manufacturing the hydrants and is therefore not advantageous.

It is therefore - according to the second and third aspect - one Object of the present invention, a hydrant with a pipe connection to create, which one on a certain trench depth or pipe cover customizable hydrant creates, hence the state of the art known disadvantages can be eliminated.

The This task is according to a first aspect by the features of independent claim 1 solved by a connection between an inner tube and a, telescopic to the inner continuously displaceable, outer tube proposed is, wherein the inner tube has an external thread and the outer tube is at least partially included. The pipe connection according to the invention is characterized in that the connection comprises a flange, which has a female thread complementary to the internal thread and screwed onto the inner tube; that the connection has a counterflange includes, on the outside Pipe is arranged and for the positive centering of the two tubes cooperates with the flange; and that a thread seal on Circumference of the inner tube is arranged, which when tightening of the flange on the mating flange is deformed so that one positive and tight connection between the two tubes arises.

Further features and embodiments - in particular also the solution according to the task the second and third aspects - arise from the dependent ones Claims.

Embodiments of the prior art are in the 1 and 2 shown. Embodiments of the present invention are in the 3 to 6 shown; these figures are merely schematic illustrations of preferred embodiments of the present invention and are not intended to limit the scope thereof in any way. Show it:

1 a vertical section through a known above-floor hydrant of the same applicant ( 1 out CH 675 139 );

2 a partial section through a known above-ground hydrant telescopic 14/1 of E. Hawle & Co., flanges and armatures, Vöcklabruck (Austria);

3 a partial section through an invent Dungsgemäße pipe joint, according to a first embodiment;

4 a partial section through an inventive pipe joint, according to a second embodiment;

5 a partial section through telescopic riser and casing pipe of a hydrant according to the invention with a pipe joint according to the second embodiment;

6 a partial section through extension pipe and pipe connection of a hydrant according to the invention, corresponding 5 ,

Of the The term "water" is here for the sake of simplicity also for other fluids (gases and / or liquids) be used.

The in 1 shown, known from the prior art Überflurhydrant is composed of an inlet pipe 1 a riser 2 and one on the riser 2 attached overflow column 3 together. The inlet pipe 1 is in 1 represented with an inlet arch. The inlet pipe 1 However, can also be designed as a straight piece of pipe, as shown in dashed lines in 1 is drawn. In the upper part of the inlet pipe 1 is a seat 4 a main shut-off valve or main shut-off valve 5 arranged, the valve body 6 at one in the riser 2 projecting valve rod 7 is stored. To the valve rod 7 closes one in a spindle bearing 8th guided spindle 9 on, which with one on the valve stem 7 attached spindle nut 10 interacts. The spindle nut 10 has at least one finger 11 on, with which they are in one on the inside of the riser 2 arranged leadership 12 is guided non-rotatably. The breaking point 13 The hydrant is preferably located between the riser 2 and the overflow column 3 and above the spindle bearing 8th ,

On top of the spindle 9 is a sleeve-shaped spindle attachment 15 fastened, the bore top part as a square hole 16 is trained. In the square hole 16 is a spindle extension 17 introduced, whose end is also designed as a square. The spindle extension 17 protrudes through one, on the top of the tower tube 3 attached housing cover 18 ' and has an actuating square at the end 19 , The actuator 7 . 9 So can with a suitable tool on the spindle extension 17 or an actuating rod can be operated from above. On the upper housing part 18 is a protective cover base 20 attached to which a protective cover shell 21 is rotatably mounted. In the housing cover 18 ' are two formed as valves Nebenabsperrorgane 22 . 23 installed, their spindles 24 . 25 with an actuating square 26 , in the from the protective cover parts 20 . 21 projected space and sealed by seals.

The secondary shut-off valves 22 . 23 each have a valve connection 28 . 28 on top of that by a cap 29 Are completed. Through a hole 30 will the ventilation of the interior 31 with open secondary valve 22 . 23 allows. In the center of the protective cover shell 21 is a plug 32 attached, on which for opening and closing the protective cover shell 21 a key with a square hole (not shown) can be introduced. It is expedient to use a standard square for locking pins, spindles and screw caps. The drain valve 33 is a check valve with a ball 34 , which only in the absence of internal pressure in the interior 31 takes off from their seat and releases the passage to the outside.

In 2 is a partial section through the produced by the company E. Hawle & Co., flanges and armatures, Vöcklabruck (Austria) produced overground hydrant telescopic 14/1. The height adjustment of the hydrant serving pipe connection 41 includes a straight standpipe 42 and a straight hydrant column 43 , which are telescopically telescopically. In a clamping ring 44 be screws 45 inserted and in the holes provided 46 in the flange 47 at the bottom of the hydrant column 43 is arranged, screwed. By tightening these screws is a clamping ring 48 and a sealing ring 49 against each other and against the inside standpipe 42 pressed, which in the tightened state, the connection is watertight and the two tubes - because of the great friction - are held against each other immovable. From the 2 the skilled person can see that the pipe connection 41 an internal water pressure can only withstand safe, if the clamping ring 44 the clamping ring 48 and the sealing ring 49 with a certain force against the standpipe 42 suppressed.

3 shows a partial section through an inventive pipe joint, according to a first embodiment. It is a connection 101 between an inner tube 102 and one, telescopically opposite the inner continuously slidable outer tube 103 , wherein the inner tube 102 an external thread 104 and from the outer tube 103 is at least partially included. The connection comprises a flange 105 , the one to the external thread 104 complementary internal thread 106 and on the inner tube 102 screwed. The connection 101 further comprises a counterflange 107 , on the outer tube 103 is arranged and for the positive centering of the two tubes 102 . 103 with the flange 105 interacts. A thread seal 108 is on the circumference of the inner tube 102 arranged. This is when tightening the flange 105 on the counterflange 107 deformed so that a positive and tight connection between the two tubes 102 . 103 arises.

According to the first embodiment of this pipe connection is the external thread 104 designed as a round thread. The thread seal 108 has a complementary to this round thread surface and the mating flange 107 is terminal on the outer tube 103 arranged. The outer tube 103 points in the area of the counterflange 107 - For receiving at least a portion of the thread seal 108 - A circumferential recess 109 on. The surrounding depression 109 only takes a part 108 ' the thread seal 108 on, so this with a part 108 '' (in 3 dashed lines) - before tightening the flange 105 on the counterflange 107 - over the counterflange 107 also available. When tightening the flange 105 on the counterflange 107 becomes the flange 105 on the thread seal 108 pressed and this at least a part of the supernatant 108 '' deformed.

4 shows a partial section through an inventive pipe joint, according to a second embodiment. Deviating from 3 and according to the second embodiment of this pipe joint is the external thread 104 designed as a half-round thread. The thread seal 108 has a complementary surface to this semi-circular thread surface. The outer tube 103 points in the area of the counterflange 107 - For receiving at least a portion of the thread seal 108 - A circumferential recess 109 on. The surrounding depression 109 take the whole thread seal here 108 on and the flange 105 has a lead 110 on which - when tightening the flange 105 on the counterflange 107 - on the thread seal 108 press and this around the in 4 Dashed part shown deformed.

In addition to the two in 3 and 4 illustrated embodiments may be on the inner tube 102 a guide ring 111 be arranged. This prevents when moving the tubes 102 . 103 in that they tilt and injure the surfaces. Especially with coated inner surfaces (eg rust protection), the use of such guide rings is particularly advantageous.

The 5 and 6 represent as partial sections together a novel hydrant according to the second embodiment. The following description is therefore directed to both 5 and 6 , It is a hydrant with a main valve body 122 and a tower tube 123 , For stepless adjustment of the foot 124 of the top tube 123 to a given trench depth this hydrant comprises a standing over the main valve body 122 arranged jacket tube 121 and a coaxial with the jacket tube 121 and against this height-adjustable telescopic riser 120 for receiving the extension tube 123 , The telescopic riser 120 is in the jacket tube 121 slidable and facing the casing pipe 121 a connection 101 on, as they are already in the 3 respectively. 4 has been described. All corresponding parts are in the 3 to 6 provided with the same reference numerals, so that the respective comments apply accordingly.

In a preferred embodiment, the hydrant comprises an interior space 131 , which by a pipe arranged in the region of an inlet main shut-off 135 can be locked. At that end of the interior 131 which this main gate 135 is opposite, is the interior 131 in the area of a housing upper part 136 through a housing cover 140 completed. The inlet-side main shut-off 135 includes a through the interior 131 and the upper housing part 136 extending actuating device with a preferably tubular actuating rod 137 ,

Because the inventive hydrant is infinitely variable in height, also the actuator or the actuating rod 137 be infinitely height adjustable. For this purpose, the valve housing cover comprises 140 a threaded bush 141 and a running nut disposed therein 142 for stepless adjustment of the spindle extension 139 for the operation of the main shut-off 135 , All corresponding parts are in the 3 to 6 provided with the same reference numerals, so that the respective comments apply accordingly.

Application examples for the hydrant according to the invention:

1. Open the hydrant

The main valve or the main shut-off 135 is done by turning the spindle extension 139 open counterclockwise until the spindle extension engages the stop provided. As a result, the running nut moves 142 in the threaded bush 141 down to their own stop.

2. Close the hydrant

The main valve or the main shut-off 135 is done by turning the spindle extension 139 closed clockwise until the spindle extension stops at the stop provided pending. As a result, the running nut moves 142 in the threaded bush 141 up to their own stop.

When opening and closing the hydrant according to the invention ensures an inserted locking plate 145 that only the running nut 142 in the threaded bush 141 can move up and down; the threaded bush 141 itself is caused by the inserted locking plate 145 prevented from a change of position.

Although the pipe network is under pressure, the hydrant according to the invention, if it has a double shut-off 143 equipped, as revised or rebuilt as follows or adapted to an enlarged trench depth / pipe cover (eg because of a subsequent embankment).

3. Conversion or revision of the hydrant

• 1. Open the main shut-off until it stops;
• 2. cap nut 144 Loosen and lock washer 145 remove;
• 3. Continue turning the spindle extension 139 in the counterclockwise direction. This leads the Hauptabsperrogan 135 an additional stroke, which is sufficient to the trained as a ball Doppelabsperrorgan on the seat 147 to float up. As a result, the double barrier becomes tight;
• 4. via the standard built-in drain valve is now the interior 131 drained of the hydrant. The pressure of the pipe network holds the ball 143 safe in her seat.
• 5. After loosening the bridge 148 can the top tube 123 be safely lifted and the whole valve unit or each of its parts can be revised as needed.
• 6. The assembly and commissioning of the hydrant after all conversion or revision work is carried out in exactly the reverse order. The adjustment of the nut is done 142 automatically, so that a familiar and safe opening and closing of the hydrant is guaranteed.

4. Adapt the hydrant to an enlarged trench depth / pipe cover

• 1. Expose the hydrant to the flange 105 ;
• 2. Disconnect the hydrant from the network pressure by closing one Slider or procedure according to Point 3.1 to 3.5;
• 3. Check if the hydrant is really depressurised;
• 4. Top tube 123 dismantle;
• 5. Spindle bearings 149 unhook and dismantle;
• 6. Foundation ring 150 remove;
• 7. Loosen the screw connection on the flange 105 and thus relaxing or loosening the thread seal 108 ;
• 8. Turn up or lower the telescopic riser 120 to the desired trench depth or pipe cover;
• 9. Tighten the screw connection on the flange 105 and thus pressing the thread seal 108 ;
• 10th foundation ring 150 put it back on;
• 11. Insert and lock the main spindle;
• 12. Top tube 123 mount;
• 13. Commissioning according to item 3.5 to 3.1 (in reverse order with reference to Example 3) and possibly opening the net valve.

Corresponding The hydrant can also be set to a different riser length, if the Trench depth or the pipe cover (for example, as a result of subsequent Terrainabtrags) should be reduced.

• • Zwischen den beiden zu verbindenden Rohren besteht eine konstante formschlüssige Verbindung. Dies ist unabhängig davon, ob die Schrauben 112 der Verbindung 101 für Flansch 105 und Gegenflansch 107 angezogen oder etwas gelockert sind: Das innere Rohr 102 ist immer mit seiner ein Gewinde aufweisenden, äusseren Oberfläche 104 durch den zu diesem Gewinde eine komplementäre Innenoberfläche 106 aufweisenden Flansch 105, der wiederum gegenüber dem Gegenflansch 107 mit den Schrauben 112 gesichert ist formschlüssig verbunden.
• • Die sichere, spielarme bzw. schlagfreie Führung der teleskopartig gegeneinander und ineinander verschiebbaren Rohre ist durch die Gewindedichtung 108 und vorzugsweise auch durch den Führungsring 111 gewährleistet.
• • Insbesondere der Ersatz auch eines einzelnen Rohres in einem Netz mit Muffenbverbindungen bietet keine Probleme, weil die Länge des Ersatzrohres über die teleskopartige, verschiebbare Rohrverbindung nach dem Einlegen auf das erforderliche Mass verändert bzw. angepasst werden kann.
• • Dieses Anpassen erfordert keine besondere Geschicklichkeit im Ablängen eines Rohres, weil kein solches Ablängen bzw. Abschneiden mehr notwendig ist.

Advantages of the pipe connection according to the invention include:

• • There is a constant positive connection between the two pipes to be connected. This is regardless of whether the screws 112 the connection 101 for flange 105 and counterflange 107 tightened or slightly loosened: The inner tube 102 is always with its threaded, outer surface 104 through to this thread a complementary inner surface 106 having flange 105 which, in turn, faces the counterflange 107 with the screws 112 secured is positively connected.
• • The safe, low-backlash or impact-free guidance of the telescopically against each other and each other in sliding tubes is through the thread seal 108 and preferably also by the guide ring 111 guaranteed.
• • In particular, the replacement of a single pipe in a network with Muffenbverbindungen offers no problems, because the length of the replacement pipe can be changed or adjusted via the telescopic, sliding pipe connection after insertion to the required extent.
• • This adjustment does not require any particular skill in cutting a pipe, because no such cutting or trimming is necessary.

• • Die Grabentiefe, bzw. die Rohrüberdeckung kann auf die tatsächlichen örtlichen Erfordernisse ausgerichtet sein; auf die genaue Einbautiefe des Hydranten muss keine Rücksicht genommen werden.
• • Durch das Vorsehen eines demontierbaren, mit einer Hutmutter 144 gehaltenen Sicherungsblechs 145 wird eine unbewusste Manipulation an der Höhenverstellung ausgeschlossen.
• • Dieses Sicherungsblech 145 ist von oben gut zugänglich, stört aber dennoch den routinemässigen Gebrauch des Hydranten in keiner Weise.

Advantages of the height-adjustable hydrant according to the invention include:

• • The trench depth or the pipe cover can be adjusted to the actual local requirements; to the exact installation depth of the hydrant must be taken no consideration.
• • By providing a removable, with a cap nut 144 held locking plate 145 an unconscious manipulation of the height adjustment is excluded.
• • This locking plate 145 is easily accessible from above, but does not interfere with the routine use of the hydrant in any way.

Claims (11)

Connection ( 101 ) between an inner tube ( 102 ) and one, telescopically with respect to the inner continuously displaceable, outer tube ( 103 ), wherein the inner tube ( 102 ) an external thread ( 104 ) and from the outer tube ( 103 ) is at least partially included, characterized in that the compound ( 101 ) a flange ( 105 ), one to the external thread ( 104 ) complementary internal thread ( 106 ) and on the inner tube ( 102 ) is screwed; that the connection ( 101 ) a counterflange ( 107 ) located on the outer tube ( 103 ) is arranged and for the positive centering of the two tubes ( 102 . 103 ) with the flange ( 105 ) cooperates; and that a thread seal ( 108 ) on the circumference of the inner tube ( 102 ), which when tightening the flange ( 105 ) on the counterflange ( 107 ) is deformed so that a positive and tight connection between the two tubes ( 102 . 103 ) arises. Pipe connection according to claim 1, characterized in that the external thread ( 104 ) is designed as a round or half-round thread. Pipe connection according to claim 1 or 2, characterized in that the thread seal ( 108 ) has a surface complementary to this thread. Pipe connection according to one of the preceding claims, characterized in that the mating flange ( 107 ) terminal on the outer tube ( 103 ) is arranged. Pipe connection according to one of the preceding claims, characterized in that the outer pipe in the region of the mating flange ( 107 ) - for receiving at least a portion of the thread seal ( 108 ) - a circumferential depression ( 109 ) having. Pipe connection according to claim 5, characterized in that the circumferential recess ( 109 ) only a part ( 108 ' ) of the thread seal ( 108 ), so that these with a part ( 108 '' ) - before tightening the flange ( 105 ) on the counterflange ( 107 ) - over the counterflange ( 107 ) so that - when tightening the flange ( 105 ) on the counterflange ( 107 ) - the flange ( 105 ) on the thread seal ( 108 ) presses and deforms them. Pipe connection according to claim 5, characterized in that the circumferential recess ( 109 ) the whole thread seal ( 108 ) and the flange ( 105 ) a lead ( 110 ), which - when tightening the flange ( 105 ) on the counterflange ( 107 ) - on the thread seal ( 108 ) presses and deforms them. Pipe connection according to one of the preceding claims, characterized in that on the inner tube ( 102 ) a guide ring ( 111 ) is arranged. Hydrant with a main valve body ( 122 ) and an attachment tube ( 123 ), which - for stepless adjustment of the foot ( 124 ) of the top tube ( 123 ) to a given trench depth - one standing above the main valve body ( 122 ) arranged jacket tube ( 121 ) and a coaxial with the jacket tube ( 121 ) and against this height-adjustable telescopic riser ( 120 ) for receiving the extension tube ( 123 ), characterized in that the telescopic riser ( 120 ) in the jacket tube ( 121 ) is slidable and opposite the jacket tube ( 121 ) a connection ( 101 ) according to one or more of claims 1 to 8. Fire hydrant according to claim 9, having an interior ( 131 ), which by a arranged in the region of an inlet pipe main shut-off ( 135 ) can be shut off; the at one end, which this main gate ( 135 ), in the region of a housing upper part ( 136 ) by a housing cover ( 140 ) is completed, wherein the inlet-side main shut-off ( 135 ) one through the interior ( 131 ) and the upper housing part ( 136 ) extending actuator with an actuating rod ( 137 ), characterized in that the attachment tube ( 123 ) a valve housing cover ( 140 ), which a threaded bushing ( 141 ) and a running nut arranged therein ( 142 ) for stepless adjustment of the spindle extension ( 139 ) for the operation of the main barrier ( 135 ). Fire hydrant according to claim 10, characterized in that the threaded bushing ( 141 ) by a in the region of the valve housing cover ( 140 ) arranged safety plate ( 145 ) is secured against unintentional twisting.