RU2245483C2 - Device for applying isolation belt - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: device has housing which moves around the pipeline in spiral, isolation belt roll holder mounted on the housing, device for friction winding of belt adhesive material on the receiving drum whose axis is adjacent to the branch of the insulation belt which embraces the drum in part. The device is provided with drum shifted transversally with respect to the axes and roll holder which is braked by a rotatable roll or braking shoe which is partially embraced with the insulation belt.

EFFECT: expanded functional .

2 cl, 2 dwg

Description

The invention relates to the field of applying insulating coatings on the outer surfaces of pipelines in field or stationary conditions.

A known machine for the spiral winding of an insulating tape on a pipe [1], comprising a housing spirally rotated around it, on which support rollers are mounted, a roll holder of an insulating tape with a brake for its rotation and a device for separating the applied insulating tape and friction winding from the receiving spool of the release tape material , preventing interturn bonding of an insulating tape in a roll.

The winding device in this machine is made in the form of an axis with a receiving spool mounted on the housing adjacent to a branch of an insulating tape that extends from the roll and partially covers this spool. During the spiral rotation of the housing around the pipeline, the branch of the insulating tape coming off (contracted) from the roll is spirally wound onto the pipeline, rotating the roll, the braking of which ensures the longitudinal tension of this branch and, accordingly, the quality of the applied insulation.

The same tension provides drive rotation of the take-up spool (with simultaneous separation of release material) by frictional tangential action on the cylindrical surface of the roll of release material wound on the spool.

Really insulating tapes produced by domestic enterprises (for example, Litkor type) are characterized by the instability of a number of mechanical characteristics, for example, the degree of deformation and elongation under tension depending on temperature. This is explained, in particular, by the difference in the properties of the materials of all three interconnected layers of the tape - the carrier base, the mastic insulating layer and the release film. The density of rolls of such tapes can also fluctuate.

These instabilities directly affect the process of separation and winding of release material on the take-up spool, because, for example, a decrease in the tension of the insulating tape at the take-up spool (as well as its increased warping, can negatively affect the necessary frictional nature of the process of separation and winding of release release material up to its violation) .

An additional factor of the aforementioned instability is due to the fact that the angle of coverage of the receiving spool with an insulating tape may be insufficient and, in addition, significantly change due to a change in the angular position of the branch coming off the main roll during its consumption (reduction of its diameter).

Constant monitoring and necessary adjustments (reeling of a roll or bobbin), easily carried out in a machine with a manual drive, when the operator is constantly involved in the application of the insulating tape, is unacceptable in the automated version of the machine.

The objective of the present invention was to ensure the stability of the frictional interaction of the insulating tape and the roll of release material on the receiving spool by ensuring both the constant force of pressing the insulating tape to the aforementioned roll (receiving spool) and the constancy of the required angle (arc) of its coverage of this roll.

According to the first embodiment, the problem is solved in that in a machine for applying an insulating tape to the outer surface of a pipeline containing a housing spirally rotating around it, a holder of a roll of insulating tape with an interlayer tape anti-adhesive material placed on it, a rotation brake of this roll and a friction winding device for said material on receiving spool with its axis located adjacent to partially covering this spool, the branch of the insulating tape coming off the roll, the said device is equipped with operechnym offset axes reception bobbin and the coil holder and parallel to them podtormozheno rotatable roll partially covered with convergent branch insulating tape roll its reverse side (i.e., the inverse of said cover relative to the spool manner).

According to the second embodiment, the winding device in the machine is equipped with a brake shoe placed between the axes of the roll holder and the receiving spool and frictionally contacting the branch of the insulating tape partially covering it in a manner opposite to that of the receiving spool.

In both cases, the introduction of an additional brake-guiding element in front of the take-up spool improves the quality of winding the release material and thereby the quality and productivity of the entire machine in an automated mode.

The invention is illustrated in the drawing, where Figs. 1 and 2 show cross-sectional views of machines in a pipeline, respectively, according to embodiments 1 and 2. According to a first embodiment, a machine installed in a pipeline 1 comprises a housing 2, a drive (not shown) for spiral moving the housing 2 with supporting rollers 3. On the housing 2 is mounted a holder 4 of a roll 5 with an insulating tape mounted on a rotary braked axis 6, parallel to which on the bracket 7 of the friction winder are installed the axis of the braked rotary roller 8 and the receiving spools 9. The insulating tape in the roll 5 contains an outer base 10 bearing a mastic insulating layer 11, and a release release material (film) 12.

The machine is used as follows. After the roll 5 is installed on the axis 6 with the braking unit 13, the descending branch (end) 14 is separated from it, which is manually passed between the roller 8 and the receiving spool 9 (with a partial but counter coverage of both), then the release film 12 is separated from the end of the branch 14 and tightly wrap it in a roll on the spool 9, after which the branch 14 (without film 12) is fixed to the pipeline 1.

Next, include a machine drive, which spirally moves the housing 2 with the support rollers 3 through the pipeline 1, rotating it in the direction indicated in figure 1 arrow. In this case, the branch 14, the end of which is fixed to the pipeline 1, is pulled from the roll 5 rotated by it, passes by the roller 8 and the roll 15 covered by it, onto the spools 9, rotating them and wound onto the pipeline 1 in a spiral manner. The rotation of the roll 15 is accompanied by the separation of the film 12 from the branch 14 while winding it onto this roll.

The most important condition for the stability of the whole process is the guaranteed clamping of the branch 14 to the surface of the roll 15, which frictionly ensures its rotation, which is carried out due to the longitudinal tension of the branch 14 created by the braking of the roll 5 and the roller 8, and the braking of the roller 8 eliminates the unacceptable weakening of this tension in the case, for example , local leakage of tape winding in a roll 5.

Preliminary backward deflection of the insulating tape 14 on the roller 8 greatly facilitates (stabilizes) the separation of the release material 12 from it.

Additional stability of this process is supported by the invariability of the span of the spool 9 (and of the roll 15 on it) by the branch 14 provided by the roller 8 regardless of the change in the diameter (flow rate) of the roll 5.

The device, operation and efficiency of the machine according to option 2 (see Fig. 2) is basically identical to the above, except for the use of the brake shoe 8 (instead of the roller) in the device, secured by an articulated lever 16 on the housing 2.

This lever, as the roll 5 is consumed with a change in the angle of inclination of the branch 14, rotates this change, thereby maintaining the positional stability of the process of separation and winding of the material 12.

Thus, both options increase the reliability of winding release material by ensuring the necessary conditions for this process, including optimizing its preliminary back deflection of the insulating tape.

Used Books

1. Description of the invention of the Russian Federation to patent No. 2160864 from 12.20.2000, M.cl. 7 F 16 L 58/10, Insulating tape winding machine (prototype).

Claims (2)

1. A machine for applying an insulating tape to the outer surface of the pipeline, comprising a housing that is spirally moved around it, an insulating tape roll holder with a brake for rotating it, and a friction winding device for tape anti-adhesive material on the receiving spool with its axis partially adjacent to this the spool of the branch of the insulating tape coming off the roll, characterized in that the said device is equipped with a transverse offset relative to the axes of the receiving spool and rzhatelya roll being slowed down and parallel to the rotatable roller, partially covered with converging insulating tape roll reverse coverage reception bobbin relative manner. 2. A machine for applying an insulating tape to the outer surface of the pipeline, comprising a housing that is spirally moved around it, a holder of a roll of insulating tape with a brake for its rotation, and a device for friction winding of the tape anti-adhesive material on the receiving spool with its axis partially adjacent to this the spool of the branch of the insulating tape coming off the roll, characterized in that the said device is equipped with a transverse offset relative to the axes of the receiving spool and rzhatelya roll and parallel to the brake shoe, partially male trailing from insulating tape roll reverse coverage reception bobbin relative manner.

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