DE2136782A1 - DEVICE FOR PRODUCING PIPE JOINTS - Google Patents

Description

PATENT ADVERTISER BODE 4033 HÖSEL POST BOX TELEPHONE 02102-617Ö1. TELEX 8585166

N «♦ - 4

July 22, 1971

Novoprees G.m.b.H. & Co. KG., 4000 Düsseldorf, Scheurenstr.

Device for making pipe connections

The invention relates to a device for producing pipe connections by means of push-on sleeves or pipe ends that are plugged into one another.

It is known to produce pipe connections by means of slip-on sleeves (DtJP 1 187 870). 3ishcr is not known any useful device, this sleeve by means of pliers or To press the squeezing devices together over the pipe ends in such a way that a permanent pressure-tight pipe connection is created. All Previous attempts to create such a connection failed because of the uniformity of each squeezing process constant pressure on the connecting sleeve. The consequences of this uneven squashing of the stackable The sleeve over the pipe ends had leaks in the connections.

It is the object of this invention to provide a device create, with the help of which an always even coexistence "· squeezing slip-on sleeves over the pipe ends to be connected is achieved. Even if the neighboring device is used for a long time, the deterioration should be avoided as much as possible be kept low. The building device should suitable measures can be used for any common pipe diameter.

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BATH 209885/0637

PATENT ADVERTISER BODE. 4033 HÖSEL POST BOX. TELEPHONE 02102-61701 - TELEX 8585166

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This object is achieved in that in the In the area of the free end of a piston rod of a cylinder, two pressure rollers rolling against one another are mounted and the The pressure rollers with their side facing away from the rolling surface wedge-shaped inner flanks of the free cheeks of an interchangeable squeeze jaw touch and between the two rotatably mounted cheeks of the exchangeable Quetschbackc a spring is arranged.

This ensures that aa & the attachable sleeves are squeezed together with * constant force. By rolling together the pressure rollers arranged on a piston rod of a cylinder, the greatest possible pressure relief of the pressure roller bearings is achieved during the squeezing process. Canting of the piston rod and the resulting leaks in the cylinder are avoided. Wear of the tfangenlagera and wedge-shaped inner flanks of the free scales are compensated for in a simple manner by correspondingly further extension of the piston rod, without a change in force occurring. Another advantage of the invention is that the squeeze basins can be exchanged. Hereby is achieved that with only one crimping the connection of each standard pipe size makes w is. All that is required is the use of the crimping jaw assigned to the corresponding pipe size. In addition, squeezing jaws with the smallest possible external dimensions can always be used in accordance with the respective pipe cross-sections, so that the smaller the pipe cross-section, the smaller the space required for the squeezing device, for example in tusk slits. The easy accessibility of the insert points made possible by correspondingly small squeezing jaws also has a favorable effect on the quality of the connections made. In addition, the squeezing device does not have an unnecessarily high weight.

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2 0 9 8 8 5/0637 bad original

PATENTANWALT BODE - 4033 HÖSEL POST BOX TELEPHONE 02102-61701 TELEX 8585166

Furthermore, it is to be regarded as very advantageous that between don the rotatably mounted cheeks of the exchangeable pliers Spring is arranged. This achieves that the crimping jaw is always kept closed by the spring force. To apply the device according to the invention, the spring force overcome by handshake and the jaw width of the squeezing jaw opened so wide that the squeezing device effortlessly over the sleeves that have not yet been squeezed together can be attached. The spring is then relaxed again by releasing it. The so attached device can unintentionally sleeve no longer be moved on the connections until the squeezing process is completed is. In addition, the fitter has both after applying the squeezing device and before the beginning of the squeezing process Hands free to align the pipes to be connected.

The spring of the exchangeable squeeze jaw is advantageously designed as a leaf spring. This will weaken the material the squeezing jaws avoided, so that the squeezing jaws of the device according to the invention are made even more manageable can.

The leaf spring is expedient with its ends on both sides of the Connection line between the pivot points of the cheeks attached to one cheek each. This will help when twisting one cheek the other turned in the opposite direction, so that the mouth of the squeezing device opens and closes symmetrically, even if force in the opening sense is only exerted on one cheek.

In order to also work in hard-to-reach places, e.g. in corners and under Ceilings to enable the use of the device according to the invention, it is provided that the jaw relative to the rest Device is cranked.

209885/0637

PATENTANWALT BODE 4033 HÖSEL POST BOX TELEPHONE 02102-61701 - TELEX 8585166

The cylinder of the device according to the invention can be acted upon hydraulically or pneumatically. It has been found to be very advantageous if a pressure-dependent switch or a pressure-dependent control system triggers the flow of pressure medium to the cylinder and this is only interrupted in a positively controlled manner when the predetermined squeezing pressure is reached . As a result, the plugged-on connecting sleeves are always evenly squeezed together around the pipe end to be connected and an insufficiently strong or leaky connection is avoided.

the drawing

An embodiment of the invention is shown in FIG and is described in more detail below.

On the piston rod 1 of a hydraulically or pneumatically acted upon cylinder 2, two pressure rollers 3, 3 'rolling off one another are arranged. The pressure rollers 3, 3 * touch the inner flanks t, 4 ^{f of} the cheeks 5, 5 'of an exchangeable crimping jaw 6 during the squeezing process. The cheeks 5, 5' of the crimping jaw 6 are rotatably mounted in the bearings 7, 7 * * the replaceable Crimping jaw 6 is firmly connected to cylinder 2 with the aid of a bolt 8. Between the cheeks 5, 5 'of the crimping jaw 6, a spring 9 is arranged, which is designed as a leaf spring and is fastened to the cheeks 5, 5 * by means of a screw 10, 10' each, on both sides of the connecting line between the bearings 7, 7 '.

Patent claims:

20988S / 0637 E / s ORtGiNAL

Claims (5)

Patent claims: Iy device for the production of pipe connections by means of slip-on sleeves or pipe ends that are interlocked with one another, characterized »that in the area of the free ends of a piston rod (1) of a cylinder (2) two pressure rollers (3,3 ') rolling against each other are mounted and the pressure rollers (3,3') have the wedge-shaped inner flanks with their side facing away from the rolling surface (4,4 ') of the free cheeks (5,5') of an exchangeable Touch the crimping jaw (6) and between the two rotatably mounted cheeks C5,5 ') of the exchangeable crimping jaw (6) a spring (9) is arranged. 2. Apparatus according to claim 1, characterized in that the spring (9) of the replaceable Quetschbaake (6) is designed as a leaf spring. 3. Apparatus according to claim 2, characterized in that the leaf spring (9) with its ends on both sides of the connecting line between the pivot points (7.7 *) of the cheeks (5.5 ') is attached to one cheek (5 or 5'). > f. Device according to one or more of Claims X - 3, characterized in that the squeezing jaw is angled in relation to the rest of the device. 5. Device according to one or more of claims 1 - · * » characterized by the fact that Pressure medium flow to the cylinder (2) itranga controls only is interrupted when the specified nonsense pressure is reached. XI2 / H * 2QS885 / 0837 _BATH Blank page