Clamp for connecting pipes

0001The invention relates to a pipe connection of two clamp together to pipe ends, in particular in high pressure applications.

0002Such pipe joint clamp is by the German utility model 200 22 710.6 become known.

0003In the known pipe connector clip are on the inside of the clamp Devices provided that when tightening the clamp in the Surface both tube ends dig.

0004If the known pipe clamp for connecting thin-walled tube ends used or tube ends of easily deformable materials, so can the pipe ends to be under the tightening pressure of the pipe clamp deform and this may lead to leakage at the joint of the to lead pipe ends and all the more so when the to the connecting tubes guided fluid (liquid or gas) under pressure through these pipes flows. Damage to the pipe ends to be carried permanent deformation is not excluded.

0005Object of the present invention is known pipe clamp connections such further training to the tightened state permanently joined to one another pipe ends, with even low Wall thickness, held together in fluid-tight and an axial displacement of the Pipe ends counteract.

0006This object is achieved in that on the inside the clamp devices are provided, which when tightening the clamp seen over the circumference of the pipe ends evenly strong in Outer surface of both pipe ends dig.

0007The pipe connection clamp of the invention has thus the essential Advantage that an application of pressure over the circumference of the two carried pipe ends even with strongly tightened handcuffs very uniform can. The devices for clawing are formed so that the Clawing necessary radial forces evenly over the circumference of the Distributed pipe ends are introduced into the outer surfaces of the pipe ends. Twisting and deformation of the pipe ends in the clamp be avoided, and this even when clamps greatly must be tightened, for example, fluid pressures in the interior of Pipes 50-70 bar seal. By over the circumference of the Tube ends seen homogeneous clawing is an axial Displacement of the pipe ends relative to each other permanently prevented.

0008In a preferred embodiment of the invention, the clip is for connecting of stacked tube ends or two blunt abutting Pipe ends provided. This has the advantage that the inventive Pipe connection clamp both lugged compounds blunt abutting pipe joints or in any one another cross Rohrendverbindungen can be used. With each other inserted pipe ends is arranged a sealing ring between the tube ends and the pipe connection clamp of the invention may, without another Sealing means are used. In blunt adjoining pipe ends is on the inside of the tube connecting clamp according to the invention still a sealing ring is used which seals the pipe joint by the Pipe connection clamp is contracted.

0009In a further embodiment of the invention, the devices of a first and second edge of the clamp and / or ring sections formed, which with its inner edge to the outer surface of the pipe ends dig.

0010This has the advantage that, depending on requirements, the angled edges of a Clamp band or alternatively or jointly ring sections in Interior of the pipe clamp are arranged, which in the tightened dig state of the clamp in the outer surfaces of the pipe ends. A such inventively coated pipe clamp can be attributed to the no longer move pipe ends axially and holds pipe ends permanently and fluid-tight together.

0011Furthermore, it is advantageous if the first and second flanks and / or the Ring sections are formed inclined toward the Schell Center at the clamp. This has the advantage that, in particular at a compound of lugged Pipe ends an axial displacement of the pipe ends relative to each other with increased safety is prevented.

0012In another embodiment of the pipe joint clamp according to the invention are supporting profiles on the inside of the clamp between the first and second edges and / or between the ring sections provided. Through this support profile is the invention Pipe connection clamp further stiffened and inclined to clamp band asked ring sections or flanks keep permanently their predetermined inclination when they are pressure-loaded.

0013Another embodiment of the invention, the clamp at their free Fastening means for opening, closing and tightening of the clamp, in particular screws on and to the first and second sidewalls, the free ends approximately opposite, are slits or cutouts educated. This has the advantage that such a simple clamp with Handles can be laid to connecting pipe ends by the clamp band hingedly so much stretch it over Outer periphery are pushed or placed on pipe ends to be can. Slits and / or recesses facilitate this expansion. To the Close is the clamp band on the outer circumference of the pipe ends abutting compressed and contracted on known screw.

0014the first and second edges and / or the change Preference Ring sections in height between the slots and / or the Recesses and the free ends of the clamp by the amount of the first and second flanks and / or the ring sections, the slot or Recess starting, increases to a maximum and the height then up to the free ends of the clamp scaled down again. This has the advantage that when tightening an inventive Pipe connection clamp the flanks or the ring sections strongly evenly dig distributed over the circumference in the outer surfaces of the tube ends and thus at a greater radial pressure no damage produce the pipe ends to be.

0015In another embodiment of the pipe joint clamp according to the invention is the maximum at an angle of α = 90 ° a semi-circle of the clamp between the slot or recess and reaches a free end. This measure simplest executed a uniform pressure distribution on the outer surfaces of the exercised connecting pipe sections over the periphery of these tubular parts seen will.

0016An effective and safe claw is achieved when the inner Edge of the first and second flanks and / or the inner edge of the Ring sections on the periphery distributed projections is provided. The Projections may be formed as teeth of a variety of contours and can thus more or less point-like in the penetrate outer surfaces of the pipe ends to be.

0017Further advantages of the invention will become apparent from the following Figures.

0018The pipe joint clamp invention is particularly for pressurized Tubes suitable and pipe connections can permanently secure, with internal pressures or security pressures of 50 to 70 bar are pressurized. Therefore, tube connection clamps of the invention Specifically suitable for fire mains as are used for example on ships. With the invention Pipe joint clamp can be thin-walled tubes together connect, whose wall thicknesses mm are less than. 5 It is understood, that the tube connecting clamp according to the invention also to be connected Tube ends can be used, whose wall thicknesses are greater than 5 mm. The projections of the invention may be over a semicircle of Ring sections seen in its height in half, for example, that a foreign lying projection has, for example, only half the amount on how a Projection which is formed in a semicircle at the angle of 90 °. The Change in size of the projections by an angle α = 0 ° to an = 90 ° should not continuously be carried out angle α magnifying, but the increase in the projections can to individual applications be adjusted. Thus, contiguous projections also have different heights so that each one a projection adjacent protrusion has the same height as that of this Projections protrudes limited projection on these projections addition or is shorter than those projections.

0019A pipe joint clamp includes devices that the tightening up the clamp over the circumference of the pipe end in varying degrees the outer surface of the pipe end dig. If the pipe joint clamp attracted lying about two pipe ends, so dig for the devices provided in the pipe ends and hold Pipe ends permanently and fluid-tight together.

It shows:

0020<dl tsize="6" compact="compact"><dt>Fig. 1</dt><dd>a pipe connecting clamp according to the invention, as in section a illustrated pipe grips;</dd></dl><dl tsize="6"><dt>FIG. 2</dt><dd>a section of a wall of a pipe end and from a Device which digs into the outer surface of the tube;</dd><dt>Fig. 3</dt><dd>a section through two lugged tube ends with partial views of a Pipe clamp according to the invention.</dd></dl>

0021The exemplary embodiments illustrated in the figures are not to scale to understand and show the pipe connection clamp of the invention in Items so that the present essential characteristics of the pipe clamp to are seen.

0022FIG. 1 shows at 10 a pipe connection clamp as a pipe end 11, is shown in section, embraces. The pipe joint clamp 10 is out a clamp band 12 is formed which has both sides angled edges. In FIG. 1, a first flank 13 is shown and this first flank 13 opposite another angled edge is formed by the the first edge 13 is obscured. The clamp band 12 has free ends 14, 15 , on which fastening means, such as a screw 16, fastened. about the screw 16, the pipe joint clamp 10 is opened or are drawn together. If 10 is opened, the pipe joint clamp and should they be expanded down to a pipe end 11, a slot 17 advantageously, of an unfolding of the pipe clamp halves around the slot 17 easier.

0023First ring portions 18 are inserted into the clamp band 12 and with the Clamp band 12 firmly connected. The first ring sections 18 project beyond the first edge 13 and above projections 19 of the inner edge first ring portions 18 are formed, on an outer surface 20 of the Pipe end on 11th The projections 19 dig in the tightened state of the pipe joint clamp 10 in the outer surface 20 of the pipe end 11 and this over the circumference of the pipe 11 varies. The Projections 19 have seen over the circumference of the ring portions 18 a different height 21. The height 21 of a projection 19 is close to the Slot 17 and in the vicinity of the free ends 14 and 15 less than in the the remaining area of ​​the pipe sections 18 with increasing angle α, which in Arrow up to 90 ° larger, also accept the projections 19 in their height. With a decreasing angle β, which in itself arrow reduced also decreases as the height of the projections 19th The projections 19 are inventively designed such that they at tightened pipe connection clamp 10 equally strongly about the circumference of a tube end 11 distributed press into the outer surface of the 20th

0024Fig. 2 shows a section of a first pipe end 11 and a Extract from a first annular portion 18, as on the outer surface 20 bears. The projections 19 dig into the outer surface 20, so to be connected pipe ends immovably, and this even under pressure, are held together.

0025Fig. 3 shows a pipe end 11 as it is connected to a tube end 22. The Pipe ends 11, 22 overlap and are inserted into one another. Of the Clamp band 12 are adjacent to the first edge 13 and a second edge 23 shown. The first edge 13 and second edge 23 are at right angles from Clamp band 12 angled. In clamp band 12 are placed at an angle first annular portion 18 and a second annular portion 28 arranged. These Ring portions 18, 28 are so dimensioned and with respect to the base of the The clamp band 12 inclined to the the tightened state Tube connector clip 10 can penetrate into the outer surface of the twentieth At the inner edge of the ring portions 18, 28 are projections 19, 29 formed, which dig 20 more or less with the outside surface, depending on how strongly the pipe clamp is tightened over the screws 16th The pipe ends 11, 22 are connected via a seal ring 30 against each other sealed, so that the pipe joint clamp 10 no further must have sealant. To seal this pipe joint clamp No additional sealant required.