RU2285854C2 - Rubber collar for passing cable and method of its making - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: rubber collar comprises conical section that is made in block with the collar at an angle of 30-40°C to the surface of the cone. The conical section is provided with the hollow conical member for setting the cable in the casing of the cable. The collar can be provided with two or more members for passing cables in the protecting pipelines. The method comprises assembling and vulcanizing the collar that are carried out on two curing cores simultaneously. One of the curing cores is basic one, and the other curing core is detachable.

EFFECT: enhanced reliability.

2 cl, 7 dwg

Description

The invention relates to the field of pipeline transport and can be used to seal the annular space and the passage of communication cables in the protective pipe through the sealing bend of the cuff in the transitions of the main pipelines laid in the protective casing (case) under roads and railways.

A device for communicative input and output with a housing for cable transition fixing and sealing elements (see RU 2120692, CL 6 N 02 G 3/22 from 10/20/1998).

The sealing element is made in the form of an elastic sleeve, one end of which is fixedly mounted on the flange of the housing wall with a bandage, and the other is fixedly fixed on the sleeve.

The disadvantage of this technical solution is the complexity of manufacturing. To ensure dust and water tightness and tightness, several parts are used in the device.

The objective of the invention is to create a conical cuff of rubber for passing through it a communication cable in a protective pipe, which provides reliable tightness due to the difference in the diameters of the protective pipe of the communication cables and the diameter of the cuff. In addition, an object of the invention is to provide an effective method for manufacturing a cuff.

The essence of the invention lies in the fact that the rubber cuff is made with cylindrical sections, one of which is made with a diameter of 57 mm to 1420 mm, the other section is with a diameter of 219 mm to 1720 mm, which are interconnected by a conical section, on the surface of which at an angle of 30 -40 ° to it, as a unit with the cuff, a hollow conical outlet is made for passing through it a communication cable in a protective pipe.

In addition, if necessary, for passing through the cuff of two or more communication cables on a conical surface, it is envisaged to perform two or more taps at a distance of 22-122 mm between them.

The essence of the method of manufacturing the inventive cuff is that its assembly and vulcanization is carried out on two mandrels simultaneously, one of them is the main one, copying the cylindrical sections of the cuff and connecting the conical section, and the other mandrel is removable, fixed on the conical section at an angle of 30-40 ° to its surface and a copying branch for passing the communication cable into the protective pipe.

The invention is illustrated by drawings, where

- figure 1 shows a cuff with one tap;

- figure 2 is the same front view;

- figure 3 - cuff with two branches, front view;

- figure 4 - mandrel for the manufacture of cuffs;

- figure 5 is the same front view;

- figure 6 - mandrel for the manufacture of branch;

- Fig.7 - bolt for securing the outlet on the conical section of the main mandrel.

The rubber sleeve for passing the communication cable in the protective pipe consists of a conical section 1 (Fig. 1) and two cylindrical sections 2 and 3 connected to it (Fig. 1) with a diameter of 57 mm to 1420 mm and a diameter of 219 mm to 1720 mm, respectively .

On the conical section 1 (Fig. 1), as a whole with the cuff, at an angle of 30-40 ° to the surface of the cone, a hollow bend 4 (Fig. 1,2) is made for passing through it a communication cable in a protective pipe.

The invention provides, if necessary, the execution on the conical section of the cuff of two or more taps 5, 6 (figure 3).

The cuff works like a regular rubber cuff to seal the annulus. With the cylindrical section 2 (FIG. 1), the cuff is attached to the main pipeline, and the cylindrical section 3 (FIG. 1) is attached to the casing (case) (these figures do not show how the cuff is fixed). Through the tap 4 (FIG. 1) of the cuff, the protective pipe for the communication cable is tightened to the specified section, after which the communication cable is pulled into the pipe to the specified mark.

Due to the tight compression, due to the difference in the diameters of the protective pipe of the communication cable and the inner diameter of the elbow of the rubber cuff, the dust and water tightness of the elbow is ensured.

A method of manufacturing the inventive rubber cuff for the passage in the protective pipe of the communication cable is as follows.

The cuff is assembled and vulcanized on two mandrels, one of which is the main one, copying the shape of the conical cuff, and the other is removable, copying the shape of the tap, is mounted on the conical section of the main mandrel at an angle of 30-40 ° to the surface of the cone using a coupling bolt 8 (Fig. 4 , 7) and a rigidly fixed nut 9 (Fig. 4) on the inside of the cuff mandrel.

Preliminarily, on the conical part of the mandrel 7 (Fig. 4), the cuffs are fixed by means of a coupling bolt 8 (Fig. 4) and a nut 9 welded from the inside of the mandrel (Fig. 4), a removable conical mandrel 10 of the cuff outlet (Fig. 6). Then, the cuff mandrel thus assembled is mounted and fixed at the centers 11, 12 for applying raw rubber.

Rotating the mandrel in the centers, impose simultaneously on the entire surface and on the surface of the mandrel 10 plates of crude rubber with a thickness of 2-3 mm, while controlling the tight fit of the rubber to the mandrel to deflect the cuff.

Then roll the laid rubber to the mandrels with a roller; bubbles formed pierce with an awl and re-roll these places. Raw rubber is applied in two to three layers.

After applying raw rubber and rolling all surfaces of the mandrels, the cylindrical parts 13, 14, the mandrel of the cuff are wrapped with cotton material to obtain high-quality cylindrical seats of the rubber cuff. Then stand 10 minutes to relieve stress and place the mandrel in the vulcanization boiler with a vulcanization temperature of 130 ° C-140 ° C, the vulcanization time of 90-100 minutes

After vulcanization, the mandrel with the cuff is removed from the vulcanization boiler, it is cooled to ambient temperature, the cotton material is unscrewed from the cylindrical parts of the cuff.

Then on the conical part of the mandrel of the cuff from the mandrel of the outlet 10 (Fig. 4), the coupling bolt 8 is turned out, the vulcanized cuff 1 (Fig. 1) is removed from the main mandrel together with the outlet 4.

The removed cuff from the mandrel is placed vertically and the mandrel 10 of the outlet 10 is removed from the inside of the cuff to the inside of the cuff.

The bent cuff manufactured in this way is a single unit.

Then on the cuff, bumps and scuffs are eliminated, silicone grease is applied from the outside, and talcum powder is sprinkled on the inside.

The manufacture of conical rubber cuffs with two or more bends (figure 3) is carried out in a similar way, taking into account the fact that the mandrels of the bends are located on the conical part of the main mandrel at a distance of 22-122 mm from each other.

The proposed method of manufacturing a rubber cuff with a bend for passing through the protective cable of the communication cable will allow to produce similar cuffs at low cost, while guaranteeing reliable sealing of the cable in the cuff when laying it, which significantly reduces the construction time of junctions under the roads.

Claims (6)

1. A rubber cuff for skipping in the protective pipe of the communication cable, made in the form of a cone with cylindrical sections at the top and bottom of the cone, characterized in that on its cone in one piece with the cuff at an angle of 30-40 ° to the surface of the cone a hollow conical tap . 2. The cuff according to claim 1, characterized in that the cylindrical section at the top of the cone is made with a diameter of 57 ÷ 1420 mm, and the cylindrical section at the base of the cone is made with a diameter of 219 ÷ 1720 mm. 3. The cuff according to claim 1, characterized in that it is equipped with a second branch located from the first at a distance of 22-122 mm 4. A method of manufacturing a rubber cuff according to claim 1, characterized in that its assembly and vulcanization is carried out on two mandrels simultaneously, one of which is the main one, copying the cylindrical sections of the cuff and connecting the conical section, and the second mandrel is removable, fixed on the conical section under an angle of 30-40 ° to its surface and a copying branch for the passage of the communication cable in the protective pipeline. 5. The method according to claim 4, characterized in that the retention mandrel is kept on the conical section of the main mandrel using a coupling bolt passed through the outlet mandrel into the hole of the main mandrel and screwed into a nut welded on the inner surface of the conical portion of the main mandrel. 6. The method according to claim 4, characterized in that the cuff is assembled by successively applying crude rubber in 2-3 layers with a layer thickness of 2-3 mm to the mandrel, followed by vulcanization of the assembled cuff in a vulcanization boiler at a temperature of 130-140 ° C. and exposure for 90-100 minutes

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