RU2229652C1 - Clip for rubber gland securement on pipeline - Google Patents

Abstract

FIELD: machinery building, particularly arrangements for connecting pipes to rigid members. SUBSTANCE: gland comprises coiled up clip member formed of flexible material, for instance of annealed rolled iron of round cross-section having diameter of 4 - 7 mm. Rests having orifices are welded to clip member. Rests are made of steel angle members having 25+ACo-25 mm dimensions. The first rest is flushed with one end of clip member and stop is welded parallel to the first rest along the whole stop length such that stop is offset relative the rest. Stop ends and clip member ends are beveled at the angle of 30 - 45 deg for eliminating cuts in rubber gland during clip tightening. The second rest is welded to clip member at a distance of 50 - 300 mm from clip member end. EFFECT: simplified structure, reduced labor consumption during clip member production and assembling. 3 cl, 5 dwg

Description

The invention relates to mechanical engineering, in particular to devices for attaching rubber cuffs on pipelines with a diameter in the range of 57-1720 mm in order to reliably seal the annular space during the construction of crossings of main pipelines through roads and railways. A known clamp, consisting of a metal tape, a screw and a screw housing, mounted on one end of the tape (see RU patent No. 18435, F 16 L 33/02, 2000).

A collar is also known for fastening sleeves on rigid fittings and pipes (see RU patent No. 2155292, F 16 L 33/08, 1999), containing a metal tape with transverse corrugations at one end, and a welded stop with hole.

A housing with a screw is mounted in the stop hole. The case is made in the form of a frame with a threaded hole for the screw.

The corrugated end of the tape is inserted into the groove of the frame, stretched to failure, then screwed into place.

The disadvantages of the above construction of clamps are:

the great complexity of manufacturing, complicated installation, as well as the inability when compressing the tape to achieve sufficiently high crimping forces that would ensure reliable tightness of the connection.

The present invention solves the problem of ensuring reliable tightness of the cuff on the pipeline by compressing it with an element in the form of rolled round section. This is explained by the fact that the maximum forces arising during compression are created at the point of contact of the crimping element with the surface of the cuff.

The fastening of the cuff by a clamp in the form of a metal tape cannot provide the same effect as the proposed crimp element, made in the form of a round rolled from annealed metal, since the metal tape arising crimping forces are the same throughout the entire width.

Means for achieving the technical result are that the clamp for attaching the rubber sleeve to the pipeline is made of a crimped element rolled into a ring, which is a soft material, for example, annealed round rolled steel with a diameter of 4-7 mm. Both ends of the crimping element are provided with welded stops, which are steel corners, for example 25x25 mm.

On the stops holes are made for installing the coupling bolt, for example, dimensions 8x50 mm.

One of the stops is welded to the crimp member at a distance of 50-300 mm from its end, and the second stop is welded flush to the other end of the crimp member, and a stop made of the same material as the crimp member is welded parallel to the crimp along its entire length along this length. .

The ends welded to the stop of the crimping element and the limiter on the clamping side of the clamp are cut at an angle of 30-45 °.

The design of the clamp for attaching rubber cuffs on the pipeline is illustrated by the drawings:

figure 1 - the proposed collar assembly, a view in a perspective view;

figure 2 is the same, a top view;

figure 3 is a side view of the stop with a stop;

figure 4 is a view cut at an angle of the crimping element and the limiter;

figure 5 is a view of a clamp of two halves.

The clamp for attaching the cuff to the pipeline contains a crimped element rolled into a ring, which is annealed steel products with a diameter of 4-7 mm.

At one end 1 of the crimping element, a stop 2 is flush-welded (FIGS. 1, 2, 3), which is, for example, a steel angle of 25x25 mm, with a hole 3 (FIG. 3).

On this stop along its entire length, parallel to the welded crimp element, with an offset from it, a limiter 4 of the same material as the crimp element is welded.

The ends of the crimping element and the limiter are cut off from the side of the clamp clamp at an angle of 30-45 ° (Fig. 4) to protect the rubber cuff from cuts when pulling the clamp.

The gap 5 between the crimping element 1 and the limiter 4 (figure 3) is selected slightly larger than the diameter of the crimping element.

At the second end 6 of the crimping element at a distance of 50-300 mm from its end 7, a stop 8 is welded with a hole (Fig. 1). A bolt 9, for example, with dimensions of 8x50 mm, which is twisted with a nut 10 (figure 1) is passed through the holes 3 of the stops (Fig. 3). The cuffs are fastened on pipelines with a diameter of 57 to 530 mm with an integral clamp, and for the cuffs are fastened on pipelines with a diameter of 530 to 1720 mm or more, are secured with a collar consisting of two halves 11 and 12, each of which is structurally designed in the same way as an integral the clamp, providing the same functions, contracted by the connecting elements 13 and 14 (figure 5).

The clamp for attaching the cuffs to the pipeline works as follows.

When slightly crimped crimp element located on part 6 (Fig. 1), its end 7 is inserted into the gap 5 on the stop 2, formed by the fixed end 1 of the clamping element and stop 4.

Squeezing the stops 2 and 8, bring them closer to each other. In this case, by passing the end 7 of the crimping element through the gap 5, the exact coincidence of the axes of the holes 3 of the stops 2 and 8 is ensured (Figs. 1, 4). Then, into the holes of the stops 2 and 8, a coupling bolt 9 is inserted (Figs. 1, 2, 3), for example, with dimensions of 8x50 mm and tightened with nut 10. Thus, the clamp is secured. Dismantling is carried out in the reverse order.

The cuffs are fastened to a pipeline with a diameter of 530-1720 mm or more by a clamp of two halves.

Using an integral clamp to secure the cuffs on pipelines of such a large diameter, it is impossible to ensure their reliable crimping, and therefore the tightness of the connection.

When using a clamp, consisting of two halves, the tension of the clamp is ensured in both its parts, and, consequently, the uniform crimp of the cuff over the entire diameter of the pipeline is ensured.

Using the proposed technical solution allows us to simplify the design of the clamp, reduce the complexity of its manufacture and its installation, as well as provide reliable tightness of the annulus for a pipe with a diameter of 57-1720 mm or more.

Claims (3)

1. A clamp for attaching a rubber cuff to a pipeline, consisting of a metal crimped element rolled into a ring and welded stops with holes mounted on it, characterized in that the crimped element is made of soft material, for example, annealed steel rolled round section with a diameter of 4-7 mm . 2. The clamp according to claim 1, characterized in that one of the stops is welded to the crimp element at a distance of 50-300 mm from its end, and the second stop is welded flush to the other end of the crimp element and a limiter is welded along the entire length of the stop in that the same material as the crimp element, while the ends of the crimp element and the limiter on the side of the clamping of the clamp are cut at an angle of 30-45 °, and the distance between them is selected to be sufficient to allow the free end of the crimp element to pass through it. 3. The clamp according to claim 1, characterized in that for crimping the cuffs on the pipelines with a diameter of 530-1720 mm, it is made of two parts, each of which is structurally made in the same way as the integral clamp, providing the same functions.

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