DE8500323U1 - DEVICE FOR TESTING AND BLOCKING TUBES - Google Patents

Description

Patent attorneys

LEWINSKY & FRIETSCH

Gotthsrdstr. 81
D-8000 Munich 21

Munich, January 8, 1985 15.578-I / Sb

Städtler & Beck OHG, BoschstraSe 24, 6720-Speyer

Device for testing and shutting off pipes

The device according to the innovation is used to test and shut off pipes of all types and sizes. With previously known Such devices must be ejected at higher pressure, which always takes a lot of time and is often associated with great difficulties.

The innovation is based on the task of eliminating the need for such a spalling off at higher pressures and associated therewith avoid significant expenditure of time and difficulty.

According to the innovation, this is achieved by means of a pressure cylinder to be inserted axially into the pipe to be tested and shut off with a frustoconical outer wall, in its smaller circumferential area an elastically sealing rolling ring rests, which under axially directed action initially on an axial one connected to the pressure cylinder Pull spindle seated pressing and centering member on the revolving Inner wall of the pipe can be fixed and then a clamping member to be placed on the open end of the pipe by means of a tensioning screw that acts on it and sits on the tensioning screw protruding from the open end of the pipe can be pressed between the pressure cylinder and the inner wall of the pipe.

Due to the rolling effect of the elastic sealing Rolling ring, it is possible to absorb large prints without sprouting, which is the case with previously known such Devices is only possible with small nominal sizes.

Larger pipe tolerances can be achieved by using rolling rings with larger cross-sections and larger outside diameters be collected with the same inner diameter.

When using one set, namely two such devices, can check entire pipe sections for strength and tightness of the pipe, even the sleeves, branches and Weld seams are checked, whereby additional fittings are to be attached.

In the drawing, a device of the type proposed here is schematically illustrated in an exemplary embodiment in a partially sectioned side view. The device consists of a pressure cylinder 1, mostly. made of aluminum, for larger devices made of steel. The elastically sealing rolling ring 2 is made of rubber or another elastomer. The pressing and centering element 3 expediently consists of a coaxial iron ring 3 ¹ and an iron support 3 ″ aligned with it and connected via iron supports 3 ″, for example in the form of a circular iron or a star made of flat iron, the axial position of which is defined by a Pull spindle 4 seated screw 3 ^{1111 is} changeable. This tension spindle 4 also serves as a filling or venting port in smaller devices of this type. In the case of larger devices, these additional fittings can also be attached to the pressure cylinder 1. Finally, a tensioning member 5 consisting of a bracket or a cross and a tensioning screw 6 acting on this are provided

The use of the device proposed here happens as follows: The device is initially without the Tensioning member 5 pushed into the pipe 7 to be tested. So-

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then the sealing rolling ring 2 with the pressing and centering member 3 ^{is pushed down by means of its screw 3 1111} until it is firmly seated between the pressure cylinder 1 and the inner wall of the pipe 7. Then the clamping member 5 is placed on the open pipe end and the device is centered at the same time. Then the pressure cylinder 1 is tightened with the clamping screw 6 via the tension spindle 4 / whereby the sealing rolling ring 2 rolls on the conical outer wall of the pressure cylinder 1 and is pressed further and further into the constriction between the pressure cylinder 1 and the inner wall of the pipe. If the pipeline is also pressurized at the same time, the same effect is achieved on the rolling ring 2 as with the clamping screw 6.

Claims (2)

Protection claims s 1. Device for testing and shutting off pipes, characterized by a pressure cylinder (1) to be inserted axially into the pipe to be tested and shut off (7) with a frustoconical outer wall, in the smaller circumferential area of which an elastically sealing rolling ring (2) rests, which under axially directed action first of a press-and-center press seated on an axial tension spindle (4) connected to the pressure cylinder ¹ ^ trierorgan (3) can be fixed on the circumferential inner wall of the pipe (7) and then a tensioning member (5) to be attached to the open end of the pipe (7) by means of a tensioning spindle which engages on it and protrudes from the open end of the pipe ( 4) seated clamping screw (6) can be pressed in between the pressure cylinder (1) and the inner wall of the pipe. 2. Device according to claim. 1, characterized in that the pressing and centering element (3) consists of a coaxial Iron ring (3 ') and an aligned iron support (3 ^{11 ) connected via iron supports (3 111} ), the axial position of which can be changed by a screw (3 ¹¹¹¹ ) seated on the tension spindle (4).